CN208771089U - Gas solid separation system in fumed nano power production - Google Patents
Gas solid separation system in fumed nano power production Download PDFInfo
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- CN208771089U CN208771089U CN201820791893.XU CN201820791893U CN208771089U CN 208771089 U CN208771089 U CN 208771089U CN 201820791893 U CN201820791893 U CN 201820791893U CN 208771089 U CN208771089 U CN 208771089U
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Abstract
The utility model provides the gas solid separation system in a kind of fumed nano power production, gas-solid mixing conduit is connect with cyclone separator, cyclone separator bottom is connect with product surge tank, product surge tank is connect through venturi conveyer one with deacidification furnace, and deacidification furnace and venturi conveyer two are connected to product feed bin.It is connect through pipeline with cyclone separator at the top of deacidification furnace.It is connect through pipeline with separation buffer tank at the top of cyclone separator, separation buffer pot bottom is connect through venturi conveyer three with cyclone separator.Separation buffer tank top is connect with bag filter again after pipeline is connect with heat exchanger, and bag filter is connected to washing absorption device.Bag filter bottom is connect through venturi conveyer four with separation buffer tank.The utility model is using in such a way that cyclone separator is additionally arranged at the bottom product surge tank, and convenient for the sedimentation and separation of powder, the acid gas carried secretly in powder substantially reduces, and deacidification effect of the product in follow-up equipment deacidification furnace is obvious.
Description
Technical field
The utility model provides a kind of gas-solid separating device, specially white carbon black vapor phase method gas-solid produced during the preparation process
The separator and separation method of mixture.
Background technique
Halide such as silicon tetrachloride, methyl trichlorosilane, ocratation, four are usually used in the preparation of fumed nano powder
Titanium chloride, aluminium chloride etc. are primary raw material, and polycondensation reaction is hydrolyzed at high temperature and oxide powder material is made.It is reacted
Principle is as follows:
By reaction equation it is found that will generate hydrogen chloride or hydrogen fluoride gas during the reaction, these gases are easy absorption
Make them that there is stronger acidity on oxide powder material surface, to affect their application.And it is fluorinated hydrogen
Body is even more serious to Influence of production, it is known that hydrofluoric acid is easy to react with silica, so if not in time
Hydrogen fluoride gas and silicon dioxide granule separation, will affect the yield of silica product.So raw in fumed nano powder
The design of gas solid separation system in production, the influence to subsequent technique is very big, produces gas phase dioxy especially with ocratation
In the technique of SiClx, gas solid separation system is most important.
Existing fumed nano powder gas solid separation system equipment mainly include cyclone separator, venturi conveyer,
Deacidification furnace, bag filter；Normal workflow be the high-temperature gas-solid mixture to come from front end be introduced into cyclone separator into
Row gas solid separation, the powder after separation is deposited on the bottom of cyclone separator and is sent by venturi to deacidification furnace depickling, after depickling
Product is admitted to product feed bin, and the tail gas at the top of deacidification furnace carries a small amount of powder secretly and is admitted to bag filter；From cyclone separator
The gas that top comes out carries a small amount of powder secretly and enters bag filter, is further separated in bag filter, cloth bag
Powder under deduster bottom deposit, which is sent by venturi to cyclone separator, carries out gas solid separation again, goes out from bag filter
The gas come enters washing tail gas absorptive unit.The system has the following deficiencies:
1. the venturi feeding ability of cyclone separator bottom is affected due to the fluctuation of system, can be incited somebody to action when feeding is big
Acid gas in cyclone separator is extracted into deacidification furnace, influences the deacidification effect of deacidification furnace；Feeding hour will lead to cyclone separator
Middle buildup influences the separative efficiency of cyclone separator, can aggravate follow-up equipment cloth bag after the Effiency of whirlwind Separator decline and remove
The workload of dirt device increases the resistance of whole system, causes the unstable of production system.
2., in order to guarantee the stabilization of production, bottom venturi feeding can be generally increased when bag filter resistance rises,
But will lead to the increasing of cyclone inlet tolerance in this way, the separative efficiency decline of cyclone separator certainly will be will lead to, more
Dust can enter bag filter from Cyclone outlet, cause the load of cloth bag to increase, formed vicious circle.
3. entering cloth bag together after the tail gas mixing come out at the top of the tail gas and deacidification furnace that come out at the top of from cyclone separator
Deduster, Cyclone outlet exhaust temperature between 170-200 degree, deacidification furnace exhaust temperature between 300-350 degree, by
Short in process, temperature maintains between 180~220 degree after the mixing of two strands of tail gas, and high-temperature gas enters right after bag filter
The service life of filter bag causes influence, and the service life of filter bag reduces, and maintenance cost increases.
Summary of the invention
The utility model provides the gas solid separation system in the new fumed nano power production of one kind, overcomes tradition point
Defect from system improves the stability of separative efficiency and production, reduces production cost.It is illustrated below with reference to figure:
Gas solid separation system in fumed nano power production, gas-solid mixing conduit are connect with cyclone separator, rotation
Wind separator bottom is connect with product surge tank, and product surge tank is connect through venturi conveyer one with deacidification furnace, deacidification furnace with
Venturi conveyer two is connected to product feed bin.
It is connect through pipeline with cyclone separator at the top of the deacidification furnace.Through pipeline and separation buffer at the top of cyclone separator
Tank connection, separation buffer pot bottom are connect through venturi conveyer three with cyclone separator.The separation buffer tank top warp
Pipeline is connect with bag filter again after connecting with heat exchanger, and bag filter is connected to washing absorption device.
The bag filter bottom is connect through venturi conveyer four with separation buffer tank.
The gas solid separation system in fumed nano power production described in a kind of carries out gas-solid separating method, including as follows
Step:
(1) the high temperature gas phase method white carbon black gas-solid mixture (temperature is 170-200 DEG C) to come from front end is introduced into whirlwind
Separator carry out gas solid separation, isolated powder since gravity deposits in the product surge tank below cyclone separator,
It is sent afterwards by venturi conveyer into deacidification furnace and depickling is carried out to powder, it is defeated by venturi after the powder completion depickling in deacidification furnace
Device is sent to send to product feed bin；
(2) tail gas at the top of deacidification furnace containing a small amount of powder is separated by cyclone separator is re-fed into, from whirlwind point
Separation buffer tank is introduced from the gas come out at the top of device, powder is deposited on surge tank bottom due to gravity in separation buffer tank
Portion is sent to cyclone separator again by venturi conveyer and is separated；
(3) gas come out from separation buffer tank top enters bag filter after heat exchanger exchanges heat, and removes in cloth bag
The a small amount of powder carried secretly in gas is filtered in dirt device, filtered tail gas is admitted to washing tail gas absorptive unit, cloth bag
The powder of bottom deposit is sent to separation buffer tank by venturi conveyer and carries out precipitation and separation, and gas solid separation can be completed.
It is had the following beneficial effects: using the technical solution of the utility model
1. the utility model is using in such a way that cyclone separator is additionally arranged at the bottom product surge tank, convenient for powder sedimentation and
Separation, since separating effect is obvious, the continuity that venturi conveyer one works is guaranteed, and the acid gas carried secretly in powder is substantially
Reduce, deacidification effect of the product in follow-up equipment deacidification furnace is obvious, and product pH value is obviously improved.
2. the utility model has installed separation buffer tank additional between cyclone separator and bag filter, from cyclone separator
The powder significant portion carried secretly in 1 gas come out can deposit in separation buffer tank, reduce the work of subsequent bag filter
Make load, ensure that the cycle of operation of bag filter.
3. the utility model has installed heat exchanger additional before bag filter, controlled by online thermometer into cloth bag
The gas temperature of deduster makes the service life of tetrafluoro filter bag in bag filter be protected, and does not have to frequently replacement filter bag, drop
Low production cost.
Detailed description of the invention
Fig. 1 is a kind of gas solid separation system for the preparation of fumed nano powder, which is produced by cyclone separator 1
Product surge tank 2, venturi conveyer 1, deacidification furnace 4, venturi conveyer 25, separation buffer tank 6, venturi conveyer three
7, bag filter 8, venturi conveyer 49, the composition of heat exchanger 10.
Specific embodiment
Embodiment 1
Gas solid separation system in fumed nano power production, gas-solid mixing conduit are connect with cyclone separator 1, rotation
1 bottom of wind separator is connect with product surge tank 2, and product surge tank 2 is connect through venturi conveyer 1 with deacidification furnace 4, depickling
Furnace 4 and venturi conveyer 25 are connected to product feed bin.
4 top of deacidification furnace is connect through pipeline with cyclone separator 1.1 top of cyclone separator is through pipeline and separation buffer tank 6
Connection, 6 bottom of separation buffer tank is connect through venturi conveyer 37 with cyclone separator 1.6 top of separation buffer tank is through pipeline
It is connect again with bag filter 8 after being connect with heat exchanger, bag filter 8 is connected to washing absorption device.8 bottom of bag filter
Portion is connect through venturi conveyer 49 with separation buffer tank 6.
The high temperature gas phase method nano-powder gas-solid mixture (180 DEG C) to come from front end is introduced into the progress of cyclone separator 1
Gas solid separation, isolated powder since gravity deposits in the product surge tank 2 below cyclone separator, after by venturi
Conveyer 1, which is sent into deacidification furnace 4, carries out depickling to powder, by venturi conveyer two after the powder completion depickling in deacidification furnace
5 send to product feed bin；Tail gas at the top of deacidification furnace containing a small amount of powder is re-fed into cyclone separator 1 and is separated；From rotation
The gas come out at the top of wind separator 1 is introduced into separation buffer tank 6, and powder is deposited on due to gravity in separation buffer tank
Pot bottom is buffered, is sent to cyclone separator and is separated again by venturi conveyer 37；It is come out from separation buffer tank top
Gas by heat exchanger 10 heat exchange after enter bag filter 8, in bag filter to a small amount of powder carried secretly in gas into
Row filtering, filtered tail gas are admitted to washing tail gas absorptive unit, and the powder of cloth bag bottom deposit is sent by venturi conveyer 9
Precipitation and separation is carried out to separation buffer tank 6.
Embodiment 2
The high temperature gas phase method white carbon black gas-solid mixture (180 DEG C) to come from front end is introduced into cyclone separator 1 and carries out gas
Gu separation, isolated white carbon black since gravity deposits in the white carbon black surge tank 2 below cyclone separator, after by literary mound
In conveyer 1 send into deacidification furnace 4 depickling carried out to powder, the white carbon black powder in deacidification furnace is completed after depickling by venturi
Conveyer 25, which is sent, obtains qualified gas-phase silica finished product to product feed bin；Containing a small amount of white carbon black powder at the top of deacidification furnace
Tail gas is re-fed into cyclone separator 1 and is separated；The gas come out at the top of cyclone separator 1 is introduced into separation buffer tank
6, white carbon black powder is deposited on buffering pot bottom due to gravity in separation buffer tank, again by venturi conveyer 37
It send to cyclone separator and is separated；The gas come out from separation buffer tank top removes after the heat exchange of heat exchanger 10 into cloth bag
Dirt device 8 is filtered a small amount of white carbon black powder carried secretly in gas in bag filter, and filtered tail gas is admitted to tail
Gas washing absorptive unit, the white carbon black powder of cloth bag bottom deposit, which is sent by venturi conveyer 9 to separation buffer tank 6, to be precipitated
Separation.
The utility model is applied to Yichang remittance 3 × 2000 ton/year of 6 line process units separation system of silica-rich material second phase, this
Invention system has following different and advantage compared with traditional separation system:
1. the utility model separation system has installed product surge tank 2 additional below in cyclone separator 1；
2. the utility model separation system has installed separation buffer tank 6 additional between cyclone separator 1 and bag filter 8；
The introducing of above-mentioned surge tank, so that being reduced into solid content in the gas of bag filter 1% hereinafter, cloth bag
Deduster pressure difference maintains within the scope of technology controlling and process (processing range is < 15Kpa) for a long time, significantly reduces bag filter
Load.
The utility model separation system has installed cooler 10 additional before bag filter 8, controls cloth using robot control system(RCS)
Bag dust collector inlet exhaust gas temperature (it is 150 ± 10 DEG C that tail gas, which enters temperature)；It can guarantee the exhaust temperature into bag filter
Control extends the service life of bag filter within process set value (technological temperature is set in less than or equal to 170 DEG C).
3. natural subsidence or electrostatic precipitation, accelerated particle sedimentation separation can be used in surge tank.
4. Tthe utility model system pressure is stablized, product quality is guaranteed product vapor phase method nano silica than table wave
Dynamic range is reduced to ± 10 by original ± 25, and the pH value of white carbon black product is promoted to 4.15 by original 3.95.So that gas phase
The specific surface area and pH value controlled level of silica are significantly larger than standard GB/T/T 20020-2013 requirement.
Since the production of fumed silica is carried out in a continuous, closed system, production process is related to original
Material vaporization, mixing；The processes such as combustion reaction, particle buildup, gas solid separation, depickling, vent gas treatment, temperature, the pressure of whole system
The variation of the parameters such as power brings the key technical index of the pH value of specific surface area, particle size and distribution, product to product
It influences.Using the technical solution of the utility model, on the one hand can range of pressure fluctuations in guarantee system it is small, on the other hand,
The temperature fluctuation that certifiable product enters bag filter is small, and is lower than set temperature.Therefore it can guarantee the specific surface of product
Product is stablized, and improves the pH value of product and extends the service life of bag filter.
Claims (5)
1. the gas solid separation system in fumed nano power production, which is characterized in that gas-solid mixing conduit and cyclonic separation
Device (1) connection, cyclone separator (1) bottom are connect with product surge tank (2), and product surge tank (2) is through venturi conveyer one
(3) it is connect with deacidification furnace (4), deacidification furnace (4) and venturi conveyer two (5) are connected to product feed bin.
2. the gas solid separation system in fumed nano power production according to claim 1, which is characterized in that deacidification furnace
(4) top is connect through pipeline with cyclone separator (1).
3. the gas solid separation system in fumed nano power production according to claim 1, which is characterized in that whirlwind point
It is connect through pipeline with separation buffer tank (6) from the top of device (1), separation buffer tank (6) bottom is through venturi conveyer three (7) and rotation
Wind separator (1) connection.
4. the gas solid separation system in fumed nano power production according to claim 3, which is characterized in that separation is slow
It rushes at the top of tank (6) and is connect again with bag filter (8) after pipeline is connect with heat exchanger, bag filter (8) is connected to washing
Absorption plant.
5. the gas solid separation system in fumed nano power production according to claim 4, which is characterized in that cloth bag removes
Dirt device (8) bottom is connect through venturi conveyer four (9) with separation buffer tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820791893.XU CN208771089U (en) | 2018-05-25 | 2018-05-25 | Gas solid separation system in fumed nano power production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820791893.XU CN208771089U (en) | 2018-05-25 | 2018-05-25 | Gas solid separation system in fumed nano power production |
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| Publication Number | Publication Date |
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| CN208771089U true CN208771089U (en) | 2019-04-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108607306A (en) * | 2018-05-25 | 2018-10-02 | 广州吉必盛科技实业有限公司 | Gas solid separation system in fumed nano power production and separation method |
| WO2021164102A1 (en) * | 2020-02-20 | 2021-08-26 | 广州汇富研究院有限公司 | Surface modification combined treatment device and method for fumed silica |
-
2018
- 2018-05-25 CN CN201820791893.XU patent/CN208771089U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108607306A (en) * | 2018-05-25 | 2018-10-02 | 广州吉必盛科技实业有限公司 | Gas solid separation system in fumed nano power production and separation method |
| WO2021164102A1 (en) * | 2020-02-20 | 2021-08-26 | 广州汇富研究院有限公司 | Surface modification combined treatment device and method for fumed silica |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220509 Address after: 443007 No. 66-2 Ting Ting Road, Ting Ting District, Yichang, Hubei Patentee after: Hubei HuiFu nano materials Co.,Ltd. Patentee after: Hubei Xingfa Chemical Group Co., Ltd Address before: No. 15, Nanxiang 3rd road, Science City, high tech Industrial Development Zone, Guangzhou, Guangdong 510663 Patentee before: GUANGZHOU GBS HIGH-TECH & INDUSTRY Co.,Ltd. Patentee before: Hubei Xingfa Chemical Group Co., Ltd |
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| TR01 | Transfer of patent right |