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June, 2015

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Potential risk factors for solar polysilicon production process

Different from those used to electronics and solar cells, monocrystalline silicon, is also different from amorphous silicon thin-film devices and solar cells, polysilicon is made up of tiny silicon materials. Major polysilicon producer Hemlock Semiconductor, OCI, WACKER (Wacker Chemie), GCL-poly energy, and REC, LDK Solar, MEMC, and some smaller producers.

Polysilicon industry is developing rapidly, and levels above 1000t polysilicon production plant were built. However, polysilicon production process, hydrogen, chlorine, trichlorosilane and silicon and other harmful substances, and there are fire, explosion, poisoning, suffocation, electric shock injuries and many other risk factors.

Harmful substances produced in the polysilicon production process of chlorine gas, hydrogen, Silicon, hydrogen chloride, trichlorosilane, main risk characteristics are:

1. hydrogen gas: mix can form explosive mixtures with air, heat or open flame or explosion. Gas is lighter than air, when indoors use and storage, leakage increased stranded roof difficult to discharge, when Mars will cause an explosion. Halogens such as fluorine, chlorine, bromine and hydrogen will react violently.

2. oxygen, combustible materials, combustible matter combustion and explosion of one of the essential elements and oxidation of most active substances. And combustible (such as acetylene and methane) forms explosive mixtures.

3. chlorine: a pungent odor and can be generated with a number of chemical explosions or explosive material. Almost all metallic and non-metallic corrosion. Are highly toxic. Is a strong irritant gases.

4. hydrogen chloride: anhydrous hydrogen chloride is non corrosive, but when in contact with water, are corrosive. Can react with reactive metal powders, releasing hydrogen gas. Cyanide can produce highly toxic hydrogen cyanide gas.

5. three hydrogen Silicon chlorine: open flame burning strongly. Subject to high thermal decomposition may produce toxic chlorine gas. Reacts with oxidants, are a fire hazard. Very volatile and fumes in the air, in contact with water or water vapour can generate heat and toxic corrosive smoke. Combustion (decomposition) products: hydrogen chloride, silica.

6. Silicon tetrachloride: heating or hot water liberation, release toxic corrosive smoke.

7. hydrofluoric acid: corrosive, very strong. H vesicant immediately burned. Can react with bare metal and releases hydrogen with air to form an explosive mixture.

8. a nitric acid: strong oxidizing. And combustible (such as benzene) and organic matter (such as sugar, cellulose) exposure will react violently, even cause fire. With alkali metals react violently. Has strong corrosion resistance.

9. the nitrogen: in case of high fever, increased pressure within the container. Cracking and danger of explosion.

10. hydrogen fluoride: highly corrosive. In case of high fever, increased pressure within the container, is in danger of cracking and exploding.

11. sodium hydroxide solution: this product is non-combustible, with strong strong corrosive, irritant can cause the human body burns.

Second, electric shock, other risk factors such as mechanical damage

Fire, explosion, poisoning is polysilicon projects in major danger and harmful factors in production, in addition, there is electric shock, mechanical damage, corrosion, dust and other hazardous and harmful factors. Are:

1. preparation of hydrogen: electrolyzer, hydrogen, and oxygen tanks, fire and explosion, electric shock and mechanical damage.

2. hydrogen chloride synthesis: synthesis furnace of hydrogen chloride, chlorine and hydrogen gas buffer tanks, fire and explosion, poisoning, electrocution.

3. the three Silicon-hydrogen chloride synthesis: three Silicon-hydrogen chloride synthesis furnace, synthesis gas scrubbers, feeding machine, fire and explosion, electric shock, poisoning, corrosion, mechanical damage and dust.

4. the synthesis gas separation: mixed gas scrubber, hydrogen chloride absorption tower, Tower, the mixed gas compressor hydrogen chloride resolved, fire and explosion, electric shock, poisoning, corrosion, mechanical damage.

5. separation of chlorosilanes: distillation, reboiler, condenser air, fire and explosion, electric shock, poisoning, corrosion, mechanical damage.

6. the three hydrogen Silicon chlorine reduction: three hydrogen Silicon chlorine carburetor, reduction furnace, reduction furnace cooling water circulation pumps, fire and explosion, electric shock, poisoning, corrosion, mechanical damage.

7. restore gas separation: mixed gas scrubber, gas compressors, hydrogen chloride absorption towers, fire and explosion, electric shock, poisoning, corrosion, mechanical damage.

8. hydrogen-Silicon tetrachloride: Silicon tetrachloride carburetor, hydrogen furnace, fire and explosion, electric shock, poisoning, corrosion, mechanical damage.

Based on the above analysis, it is the main potential risks of fire and explosion, chemical poisoning, harmful factors in terms of technology, equipment, facilities and protection problems and defects, is very likely to occur, it should be for reasons that may occur and take preventive measures to actively exclude.

Primary prevention measures are: automatic control system for production use, and improve the standard of control; in chlorine, hydrogen chloride, trichlorosilane Silicon Silicon chloride, hydrochloric acid, easy to leak part of fresh air and sets flammable and toxic gas detection and alarm system; personnel issued qualified for the job for antivirus, dust-proof and burns and other protective equipment to avoid risks of polysilicon.

Air Conditioner Air Purifier

Potential risk factors for solar polysilicon production process 1

Air-Conditioner-Air-Purifier

Item: Air Conditioner Air Purifier

Short Description: How to purify air in air conditioner room?How to clean indoor air and remove dust or bacterium in A/C building?The best answer is  to let your air conditioner become an Air Purifier.Your air conditioner shouldn`t be only a device which adjust indoor room temperature,it also should has some other function. And today,you are viewing a surprised item which let your air conditioner have a third function- cleaning and purifier indoor air.The Air Conditioner fan suction air from inlet and  go into this purifier which utilize the technology of electrostatic adherence to filter air and remove dust or bacterium in the air.Repeatable and washable,no need to replace the filter core,just need to wash it and then you can use it again.

Important Features: Electrostatic adherence to filter air and remove dust or bacterium in the air.Repeatable and washable,no need to replace the filter core

Place of origin: China , Sell to worldwide.

Order or Inquiry on “Air Conditioner Air Purifier
Models & Details for “Air Conditioner Air Purifier”

air cleaning electrostatic adherence to remove dust AC indoor unit partner Air Purifier Installed on the air condition air purifier and air conditioning

Advantage :

√ utilize the technology of electrostatic adherence to filter air and remove dust or bacterium in the air,remove PM2.5 rate 99%;
√ Repeatable and washable,no need to replace the filter core,just need to wash it and then you can use it again;
√ Nice looking;
√ Easy installation;
√ Low power consumption.

 

Buying guide to “Air Conditioner Air Purifier”
  • The item  is available for retail and wholesale;
  • The item takes large packing dimension,therefore,takes much volume weight.The place of origin is in China,when you buy one or two,please consider freight(by air or by sea) into the cost;
  • Accept bulk order with Container delivery;
  • Please contact us to email: [email protected]
General Knowledge on “the technology of electrostatic adherence to remove dust or bacterium ”

 

Air Conditioner Negative Ion Generator

Potential risk factors for solar polysilicon production process 2

Air Conditioner Negative Ion Generator

Item: Air Conditioner Negative Ion Generator

Short Description:Your air conditioner shouldn`t be only a device which adjust indoor air temperature-cooling or heating. It should have some other function.The device introduced today is a surprised item,which can let your air conditioner become a air freshner.It can let indoor air be more fresh,more cleaning and thus more comfortable.Air Conditioner Negative Ion Generator,also names Air Freshner for air conditioner,Air Purifier,can generate a lot of  Negative Ion,which are taken to everywhere with the blown air from air conditioner.Do you want the feeling that live in fresh or close to the waterfall,where let you feel very comfortable?Yes,with this Negative Ion Generator,you can own this feeling in your air conditioner room.

Important Features:Generate and quickly Distribute much of Negative Ion to everywhere in room with the function of A/C blowing air(cooling or heating).Purify air and Let you feel fresh.

Place of origin: China , Sell to worldwide.

Order or Inquiry on “Air Conditioner Negative Ion Generator
Models & Details for “Air Conditioner Negative Ion Generator”

AC-Negative-Ion-Generatorkill-bacteriaLet Air Condition become air purifier

Advantage :

√ Producing  electrostatic to remove dust;
√ Producing much of Negative Ion to let you feel live in forest or close to waterfall;
√ Improve people`s health;
√ Promote sleeping performance;
√ Very small power consumption,it takes 3W only;
√ The best partner to Air conditioner indoor unit.Clean indoor air and fresh air;
√ Easy installation and nice looking;

Feature :

Air Conditioning negative ion generator has the function to remove dust by electrostatic, clean air: negative ion generate high-voltage electrostatic which is conjunction with the air of smoke, dust particles, by the action of gravity, making the dust with static electricity, dust particles, resulting in the settlement, to dust purpose, can reduce air conditioning hardware failure rate.

  • Improve lung function: 30 minutes after inhalation of negative ions, the amount of oxygen the lungs can absorb an increase of 20% to 15% more carbon dioxide discharge.
  • Improve cardiac function: negative ions have significant antihypertensive effect, can improve cardiac function, increase myocardial viability.
  • Improve sleep: After negative effect, make people in high spirits, work efficiency, but also improve sleep, there are significant sedative and hypnotic effects.
  • Promote metabolism: negative ions can activate the body a variety of enzymes, promote metabolism.
    Enhanced disease resistance: anion can change body reactive, active reticuloendothelial system function, enhance the body immunity
  • Bactericidal function: anion easy adsorption bacteria, make it happen structural change and energy transfer, leading to bacterial disease and death.
  • With the blown air from A/C indoor unit,Negative Ion are taken to everythere in room and reach better cleaning effience.

Application :
Widely used for various types of air conditioner.It can works for wall mounted air condioner,ceiling mounting air conditioner, ground standing air conditioner,and so on.Very easy installation,just to stick it at the air outlet.

Dimension and Parameter:
Power Wattage: 3W,
Voltage: 220V,
Frequency: 50HZ,
Size: 86 * 36 * 23MM
Noise: 0
With four carbon brushes, 3200W release of negative ions!

*Suggest to use 1 unit per 10㎡ A/C room, 2 unit per 20㎡ A/C room, 3 units per 30㎡ A/C room…

Buying guide to “Air Conditioner Negative Ion Generator”
  • The item  is available for retail and wholesale;
  • The place of origin is in China,when you buy one or two,please consider freight(by air or by sea) into the cost;
  • Accept bulk order with Container delivery;
  • Please contact us to email: [email protected]
General Knowledge on “Negative Ion Generator”

The role of negative ions to improve air environment is as following:

Currently Negative Ion has been used as an important criterion for evaluation of environmental and air quality. When people walk in the beach, waterfalls and forests, breathing will feel comfortable, relaxed and happy, one of the most important reason the air is rich in negative ions. The air environment deterioration was mainly due to the air are positive and negative ions concentration ratio imbalance, the air contains harmful gases and smoke, dust, viruses, bacteria and the like. On the one hand you can adjust the air ions positive and negative ion concentration ratio, on the other hand can also play a role in purifying the air and negative ions in the air can be invisible micron floating dust, attracted by the positive and negative ions, forming molecules collide sink floor, and two of bacterial proteins make negative reversed, leaving the bacterial viability decline or death. Anion air purification characteristics inactivated fast inactivation rate of microbial air, the surface of the article, bacteria, virus inactivation are.

Environment place Negative Ion concentration and relations of human health

“Corresponds to the concentration effect of negative ions form”
Forest Falls: 10 000 -2 million human body has a natural healing power
Alpine seaside: 5000-1 million sterilization to reduce the spread of disease
Rural Field: 1000-5000 enhance immunity, antibacterial
Wilderness suburbs: 100-1000 enhance immunity, antibacterial
Park: 400-1000 enhance immunity, antibacterial
City Park: 400-600 improve the health status
Street Green Belt: 200-400 weak improve physical health
City Room: 100-induced physiological disorders such as insomnia, headache
Office buildings: 40-50 induced physiological disorders such as insomnia, headache
Industrial Development Zone: 0 prone to various diseases
The above data from the National Taiwan University of Science and Technology Professor Ye Zhengtao collected.Negative Ion concentration table Unit: / cm3

PP Damper Valves,controlling by hand,Circle Duct inline plastic VCD

Potential risk factors for solar polysilicon production process 3

HVAC Parts>>Ventilation Material>Air Duct Damper>>PP Damper Valves,controlling by hand

PP-Damper-Valves

Item: PP Damper Valves,controlling by hand,Circle Duct inline plastic Volume Control Damper

Short Description:Duct inline plastic air damper, also named Volume Control Damper for round air duct,Polypro control damper,PP control damper,plastic PP Butterfly Air Damper Valve,designed with blade,control knob and flange,regulated by manual/hand or by electric.It is an important accessory used in industrial plant or civil construction of ventilation, air conditioning,HVAC and air purification project. Generally used in air conditioning ducts, ventilation pipes, by adjust the angle of baffle to adjust the air flow volume in the duct.The material PP can prevent condensation water,anti-corrosion,and with good insulation performance.You can weld or melt flange to this damper for your application

Materials:PP plastic,Polypropylene Damper Valve,meltable and has weldability;

Size Available:to insert pipe Φ63mm,Φ75mm,Φ90mm,Φ110mm,Φ160mm,Φ200mm, Φ250mm, Φ315mm ,Φ400mm,Φ500mm﹙inner diameter﹚,all stock are available.Type: Insert Type

Place of origin: China , Sell to worldwide.

Order or Inquiry on “PP Damper Valves,controlling by hand
Models & Details for “PP Damper Valves,controlling by hand,Circle Duct inline plastic Volume Control Damper”

Damper-valve-partsgood-quality-damper

Features&Advantage :

√ Made of plastic PP or PVC,can prevent condensation water.
√ Made of plastic PP,light weight and anti-corrosion.
√ Grey color,same as PP pipe and pipe fittings;
√ Many size models,widely fit for most of duct pipes.
√ Good insulation performance,reduce energy loss.
√ Resistant to abrasion, heat and corrosion.
√ Good sealing performance to prevent the air from leakage.
√ Separable design:main body,stop plate,screw nut and handle is separable,for you to reconstruct for some project;
√ By screwing the plastic nut,can adjust the stop plate`s loose or tight to stand at a required position or angle;
√ Meltable and weldable: can incorporate PP pipe,PP Tee,PP elbow by melt way;
√ Thickness 4mm,can withstand high pressure(For DN315,thickness 5mm).
√ Easy installation and quick working.

Application :
This product is widely used in a variety of applications,mainly for ventilation project,HVAC system,duct, chimney, VAV box, air handler, or other air handling equipment,to stops or regulates the flow of air in the circular duct,from media transfer to isolation and venting, and also for water project.

Types,Dimension and Parameter:

  • DN50 ( 2″,Model Φ63,to insert OD63mm plastic pipe ),long 120mm;
  • DN65 (2.5″,Model Φ75,to insert OD75mm plastic pipe ),long 130mm;
  • DN80 (3″,Model Φ90,to insert OD90mm plastic pipe ),long 140mm;
  • DN100 (4″,Model Φ110,to insert OD110mm plastic pipe ),long 155mm;
  • DN150 (6″,Model Φ160,to insert OD160mm plastic pipe ),long 200mm;
  • DN200 (8″,Model Φ200,to insert OD200mm plastic pipe ),long 240mm;
  • DN250 (10″,Model Φ250,to insert OD250mm plastic pipe ),long 250mm;
  • DN315 (12″,Model Φ315,to insert OD315mm plastic pipe ),long 320mm;
  • DN355 (14″,Model Φ315,to insert OD355mm plastic pipe );
  • DN400 (16″,Model Φ400,to insert OD400mm plastic pipe );
  • DN500 (20″,Model Φ500,to insert OD500mm plastic pipe );
  • … …

all-PP-duct-air-dampersPP-volume-control-damper stop plate in PP-air-damper PP-Volume-Control-Damper-with handleplastic-dampers-with-stop-blade2inch-plastic-damper-by-manual 2.5inch-plastic-damper-by-manual operate 3inch-plastic-butterfly damper by hand adjusting 4inch-plastic-air regulator 6inch-plastic-duct air adjust 8inch-Air Volume Control air Damper by manual 10inch-plastic-VCD by hand 12inch-Polyproyhlene manual adjusted air damper

Buying guide to “PP Damper Valves,controlling by hand,Circle Duct inline plastic Volume Control Damper”
  • The item  is available for retail and wholesale;
  • The item takes large packing dimension,therefore,takes much volume weight.The place of origin is in China,when you buy one or two,please consider freight(by air or by sea) into the cost;
  • Accept bulk order with Container delivery;
  • Please contact us to email: [email protected]
General Knowledge on “PP Damper Valves,controlling by hand”

Air damper means the valve or a plate which can prevent or adjust/regulate air flow volume in the pipe or ventilation duct, chimney pipe, VAV box device, air handling machine, or other air processing equipments. This PP damper valve is manufactured for suiting for flowing all corrosive and non-corrosive gas environments, high and low temperature service as well.

  • PP air damper is non-toxic, health, stand high temperature;
  • Anti-rust: PP air damper can withstand PH value in a wide range of temperatures, high concentrations in the range of 1 to 14 acid and alkali corrosion;
  • Wear-resistant, non-fouling: PP air damper has uniform and smooth tube inner wall small,small flow resistance and no scaling;
  • Reducing vibration and noise: PP air damper has excellent insulation properties, can significantly reduce the vibration and noise caused by the flow of liquid.
  •  anti-cracking: PP material is good elasticity,which makes pipes and fittings sectionally together with the expansion of the liquid frost without bursting.
  •  anti-condensation, less heat loss: PP material is a poor thermal conductor, reducing condensation and reduce heat loss.
  • Easy Installation: PP damper valve is light weight, easy to install and operate, meltable and has weldability.
  • Long service life: PP duct damper valve systems can serve 50 years.

HVAC Parts>>Ventilation Material>Air Duct Damper>>PP Damper Valves,controlling by hand