CN215692403U - Molten salt separation chamber - Google Patents
Molten salt separation chamber Download PDFInfo
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- CN215692403U CN215692403U CN202121483302.0U CN202121483302U CN215692403U CN 215692403 U CN215692403 U CN 215692403U CN 202121483302 U CN202121483302 U CN 202121483302U CN 215692403 U CN215692403 U CN 215692403U
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- salt separation
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Abstract
The utility model relates to the technical field of chemical industry environmental protection, in particular to a molten salt separation chamber, which comprises a flue gas inlet, a flue gas outlet and a salt discharge hole arranged at the bottom of the molten salt separation chamber; the molten salt separation chamber is internally provided with N baffling walls which are arranged at intervals along the length direction of the molten salt separation chamber and used for dividing the molten salt separation chamber into N +1 molten salt separation chambers which are communicated with each other, and a molten salt separation device is arranged in each molten salt separation chamber and used for carrying out molten salt separation on the cracked flue gas to obtain pre-desalted flue gas and liquid molten salt; wherein N is more than or equal to 2. The molten salt separation chamber provided by the utility model can fully remove liquid salt drops with the particle size of more than or equal to 50 mu m, the removal rate of the molten salt in the flue gas reaches more than 70%, the desalting pressure of subsequent equipment is greatly reduced, the separation and recycling of salts in the waste sulfuric acid are realized, the problems of blockage and corrosion of subsequent heat exchange equipment and pipelines are solved, and the full recycling of the heat of the cracking flue gas of the salt-containing waste sulfuric acid is realized.
Description
Technical Field
The utility model relates to the technical field of chemical engineering environmental protection, in particular to a molten salt separation chamber.
Background
The production and use of dye in China is the first major country, the production and use of dye in China all account for more than 70% of the world in recent years, the production process of dye and dye intermediate produces a large amount of waste sulfuric acid, and the concentrated waste sulfuric acid contains more than 70% of sulfuric acid, organic matters, various sulfates and chlorides, such as sodium sulfate, potassium sulfate, sodium chloride, potassium chloride and the like, and is extremely difficult to treat. The domestic common treatment method comprises the following steps: neutralization, oxidation, extraction, adsorption and the like, but the methods all have the defects of low recovery rate, serious secondary pollution and the like generally, and cannot carry out thorough treatment.
CN106629630A has proposed a cracking technology who contains salt waste sulfuric acid, through carrying out pyrolysis to containing salt waste sulfuric acid, then carry out waste heat recovery to the high temperature flue gas through exhaust-heat boiler and air heater, then send into the flue gas follow-up system of making acid production finished product sulfuric acid, because contain the salt of higher concentration in the dyestuff spent acid, above-mentioned salt has generated liquid fused salt in the pyrolysis furnace, the fused salt liquid drop is smugglied secretly to heat transfer systems such as follow-up exhaust-heat boiler and air heater along with the pyrolysis flue gas in, a large amount of fused salt are attached to and are formed solid salt on heat transfer pipe wall and pipeline, block up the exhaust-heat boiler heat exchange tube, still can cause the perforation of exhaust-heat boiler heat exchange tube, bring the potential safety hazard, even the device parks.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problems that the cracking flue gas blocks a pipeline in the heat exchange process and even a device is stopped due to high salt content in the cracking flue gas in the prior art, and provides a molten salt separation chamber.
In order to achieve the purpose, the utility model provides a molten salt separation chamber, which comprises a flue gas inlet arranged at one end of the molten salt separation chamber, a flue gas outlet arranged at the other end of the molten salt separation chamber and a salt discharge hole arranged at the bottom of the molten salt separation chamber; the molten salt separation chamber is internally provided with N baffling walls which are arranged at intervals along the length direction of the molten salt separation chamber and used for dividing the molten salt separation chamber into N +1 molten salt separation chambers which are communicated with each other, and a molten salt separation device is arranged in each molten salt separation chamber and used for carrying out molten salt separation on the cracked flue gas to obtain pre-desalted flue gas and liquid molten salt; wherein N is more than or equal to 2.
Preferably, the baffle walls comprise a lower baffle wall and an upper baffle wall; one end of the lower deflection wall is arranged on the bottom wall of the molten salt separation chamber, the other end of the lower deflection wall extends into the molten salt separation chamber along the vertical direction, and the bottom end of the lower deflection wall is provided with a drainage hole; one end of the upper baffling wall is arranged on the top wall of the molten salt separation chamber, and the other end of the upper baffling wall extends into the molten salt separation chamber along the vertical direction.
Preferably, the lower baffle walls and the upper baffle walls are alternately arranged at intervals.
Preferably, the molten salt separation device comprises a frame, and M separation plates arranged on the frame and parallel to each other, wherein two ends of each separation plate are fixed on the frame and used for separating the molten salt separation cavity into M +1 flow channels, and M is more than or equal to 5.
Preferably, the angle between the separation plate and the horizontal line is 0-60 °.
Preferably, the distance between two adjacent separation plates is 50-150 mm.
Preferably, the bottom wall of the molten salt separation chamber is provided with a gradient of 1-5 per mill.
Preferably, the top of each molten salt separation cavity is provided with a manhole.
Preferably, the inner wall of the molten salt separation chamber is provided with a refractory and corrosion-resistant layer.
Preferably, the outer wall of the molten salt separation chamber is coated with a heat insulating layer.
Through the technical scheme, the molten salt separation chamber provided by the utility model can fully remove liquid salt drops with the particle size of more than or equal to 50 microns, the removal rate of the molten salt in the flue gas reaches more than 70%, the desalting pressure of subsequent equipment is greatly reduced, the separation and recycling of salts in the waste sulfuric acid are realized, the problems of blockage and corrosion of subsequent heat exchange equipment and pipelines are solved, and the heat of the cracked flue gas of the salt-containing waste sulfuric acid is fully recycled.
Drawings
Fig. 1 is a schematic structural view of a molten salt separation chamber according to an embodiment of the present invention.
Description of the reference numerals
21. Lower deflection wall 22 and upper deflection wall
23. Molten salt separation device 24 and manhole
25. Flue gas inlet 26, flue gas outlet
27. Salt discharge hole 28, refractory and corrosion-resistant layer
29. Thermal-insulating layer 210 and molten salt separation cavity
211. Drainage hole
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right as viewed with reference to the accompanying drawings, unless otherwise specified; "inner and outer" generally refer to the inner and outer relative to the profile of the components themselves; "distal and proximal" generally refer to distance relative to the contour of the components themselves.
FIG. 1 is a schematic structural view of a molten salt separation chamber according to an embodiment of the utility model; the molten salt separation chamber comprises a flue gas inlet 25 arranged at one end of the molten salt separation chamber, a flue gas outlet 26 arranged at the other end of the molten salt separation chamber and a salt discharge hole 27 arranged at the bottom of the molten salt separation chamber; n baffling walls which are arranged at intervals along the length direction of the molten salt separation chamber are arranged in the molten salt separation chamber and are used for dividing the molten salt separation chamber into N +1 molten salt separation chambers 210 which are communicated with each other, a molten salt separation device 23 is arranged in each molten salt separation chamber 210 and is used for carrying out molten salt separation on the cracking flue gas to obtain pre-desalted flue gas and molten salt, wherein N is larger than or equal to 2, preferably N is 3-10, and more preferably N is 4-6.
According to the utility model, preferably, the deflection walls comprise a lower deflection wall 21 and an upper deflection wall 22, one end of the lower deflection wall 21 is arranged on the bottom wall of the molten salt separation chamber, the other end of the lower deflection wall extends into the molten salt separation chamber 210 along the vertical direction, and the bottom of the lower deflection wall 21 is provided with a drainage hole 211; one end of the upper baffle wall 22 is arranged on the top wall of the molten salt separation chamber, and the other end extends into the molten salt separation chamber 210 along the vertical direction. Preferably, the lower baffle walls 21 and the upper baffle walls 22 are alternately arranged at intervals, so that the pyrolysis flue gas flows in a circuitous way in the molten salt separation chamber, and the molten salt separation efficiency is increased.
According to the utility model, preferably, the molten salt separation device 23 comprises a frame and M parallel separation plates arranged on the frame, wherein two ends of each separation plate are fixed on the frame and used for separating the molten salt separation cavity 210 into M +1 flow channels 231, so that the pyrolysis flue gas flows in the flow channels, the molten salt sedimentation speed in the pyrolysis flue gas is increased, droplets are formed and attached to the separation plates, and finally the droplets fall to the bottom of the molten salt separation cavity 210 along the separation plates, preferably, M is greater than or equal to 5, and more preferably, M is 8-20. Further preferably, for ease of maintenance, the molten salt separation device 23 is of an integral skid-mounted construction.
Under the optimal condition, the included angle between the separation plate and the horizontal line is 0-60 degrees, and the optimal included angle is 20-30 degrees; the molten salt separation efficiency is increased as the distance between two adjacent separation plates is smaller, but the smaller distance also leads to the increase of the flow resistance of the cracked flue gas, and further preferably, the distance between two adjacent separation plates is 50-150mm, for example, any value in the range of 50mm, 100mm, 150mm or any two of the above values; under the optimal conditions, the sedimentation of the molten salt can be accelerated, and the molten salt separation efficiency can be improved.
In order to improve the corrosion resistance of the separation plate, the material of the separation plate is preferably silicon carbide ceramic or acid-resistant ceramic.
According to the utility model, in order to discharge the separated liquid molten salt out of the molten salt separation chamber, the bottom wall of the molten salt separation chamber is preferably provided with a gradient of 1-5%, wherein the salt discharge hole 7 is the lowest point of the bottom wall of the molten salt separation chamber. Further preferably, the salt discharge holes 27 are arranged below the flue gas outlet 26.
According to the utility model, preferably, the top of each molten salt separation cavity 210 is provided with a manhole 24, so that the molten salt separation device 23 can be conveniently taken out and replaced from the manhole 24.
In order to improve the heat insulation effect of the molten salt separation chamber and improve the heat utilization rate and the molten salt separation efficiency, under the preferable condition, the inner wall of the molten salt separation chamber is provided with a refractory corrosion-resistant layer 28, and more preferably, the refractory corrosion-resistant layer 28 is made of corundum or chrome corundum; further preferably, the outer wall of the molten salt separation chamber is coated with a heat insulation layer 29, and more preferably, the material of the heat insulation layer 29 is at least one selected from aluminum silicate, magnesium silicate and calcium silicate.
Under the preferable condition, the tube side pressure drop of the molten salt separation chamber is less than or equal to 0.5 kPa. Under the optimal selection condition, the system can meet the requirement on equipment pressure drop, the negative pressure environment of the waste acid cracking system is not influenced, and the stable operation of the system can be ensured.
In a preferred embodiment of the utility model, the method for separating the pyrolysis flue gas in the molten salt separation chamber is as follows: the pyrolysis flue gas is introduced into the molten salt separation chamber from the flue gas inlet 25, the pyrolysis flue gas flows to the flue gas outlet 27 through the first molten salt separation chamber and the second molten salt separation chamber … … (the N + 1) th molten salt separation chamber in a roundabout manner, the pyrolysis flue gas flows in the narrow flow channel separated by the separation plate in each molten salt separation chamber, liquid molten salt is accelerated to settle in the flowing process, and the pyrolysis flue gas is attached to, drained to the bottom of the molten salt separation chamber through the separation plate, finally collected at the bottom wall of the molten salt separation chamber at the salt discharge hole 27 and discharged out of the molten salt separation chamber.
The molten salt separation chamber can fully remove liquid salt drops with the particle size of more than or equal to 50 mu m, the removal rate of the molten salt in the flue gas reaches more than 70%, the desalting pressure of subsequent equipment is greatly reduced, the separation and recycling of salts in the waste sulfuric acid are realized, the problems of blockage and corrosion of subsequent heat exchange equipment and pipelines are solved, and the full recycling of the heat of the cracking flue gas of the salt-containing waste sulfuric acid is realized.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the utility model, many simple modifications can be made to the technical solution of the utility model, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the utility model, and all fall within the scope of the utility model.
Claims (10)
1. A molten salt separation chamber is characterized by comprising a flue gas inlet (25) arranged at one end of the molten salt separation chamber, a flue gas outlet (26) arranged at the other end of the molten salt separation chamber and a salt discharging hole (27) arranged at the bottom of the molten salt separation chamber; n baffling walls which are arranged at intervals along the length direction of the fused salt separation chamber are arranged in the fused salt separation chamber and are used for dividing the fused salt separation chamber into N +1 fused salt separation cavities (210) which are communicated with each other, and a fused salt separation device (23) is arranged in each fused salt separation cavity (210) and is used for carrying out fused salt separation on the cracked flue gas to obtain pre-desalted flue gas and liquid fused salt; wherein N is more than or equal to 2.
2. A molten salt separation chamber as claimed in claim 1, characterised in that the baffle walls comprise a lower baffle wall (21) and an upper baffle wall (22);
one end of the lower baffling wall (21) is arranged on the bottom wall of the molten salt separation chamber, the other end of the lower baffling wall extends into the molten salt separation cavity (210) along the direction, and the bottom end of the lower baffling wall (21) is provided with a drainage hole (211);
one end of the upper baffling wall (22) is arranged on the top wall of the molten salt separation chamber, and the other end of the upper baffling wall extends into the molten salt separation chamber (210) along the vertical direction.
3. A molten salt separation chamber as claimed in claim 2, characterised in that the lower deflection walls (21) and the upper deflection walls (22) are alternately spaced apart.
4. The molten salt separation chamber according to claim 1, characterized in that the molten salt separation device (23) comprises a frame, M mutually parallel separation plates arranged on the frame, both ends of the separation plates being fixed on the frame for separating the molten salt separation chamber (210) into M +1 flow channels (231), wherein M ≧ 5.
5. A molten salt separation chamber as claimed in claim 4, wherein the separation plate is angled at 0-60 ° to the horizontal.
6. A molten salt separation chamber as claimed in claim 4 wherein the separation of adjacent two separation plates is 50-150mm apart.
7. A molten salt separation chamber as claimed in any one of claims 1 to 6 wherein the bottom wall of the molten salt separation chamber is provided with a gradient of from 1 to 5%.
8. A molten salt separation chamber as claimed in any one of claims 1 to 6 wherein each molten salt separation chamber (210) is provided with a manhole (24) at the top.
9. A molten salt separation chamber as claimed in any one of claims 1 to 6, characterised in that the inner wall of the molten salt separation chamber is provided with a refractory corrosion resistant layer (28).
10. A molten salt separation chamber as claimed in any one of claims 1 to 6, characterised in that the outer wall of the molten salt separation chamber is coated with a thermally insulating layer (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121483302.0U CN215692403U (en) | 2021-06-30 | 2021-06-30 | Molten salt separation chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121483302.0U CN215692403U (en) | 2021-06-30 | 2021-06-30 | Molten salt separation chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215692403U true CN215692403U (en) | 2022-02-01 |
Family
ID=80046518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121483302.0U Active CN215692403U (en) | 2021-06-30 | 2021-06-30 | Molten salt separation chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215692403U (en) |
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2021
- 2021-06-30 CN CN202121483302.0U patent/CN215692403U/en active Active
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Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Address before: 210048 Jiangsu Province, Nanjing city Liuhe District Dachang geguan Road No. 699 Patentee before: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Patentee before: CHINA PETROLEUM & CHEMICAL Corp. |