CN212701225U - Device for cooling and washing waste sulfuric acid cracking flue gas - Google Patents
Device for cooling and washing waste sulfuric acid cracking flue gas Download PDFInfo
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- CN212701225U CN212701225U CN201921793159.8U CN201921793159U CN212701225U CN 212701225 U CN212701225 U CN 212701225U CN 201921793159 U CN201921793159 U CN 201921793159U CN 212701225 U CN212701225 U CN 212701225U
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Abstract
The utility model relates to a device for cooling washing of waste sulfuric acid schizolysis flue gas, including following part: the liquid collection device comprises a barrel body (7), the barrel body (7) is connected with a liquid collection tank (3), a reverse spraying pipe (1) is arranged in the barrel body (7), one end of the reverse spraying pipe (1) is a flue gas inlet end (11), the other end of the reverse spraying pipe is a reverse spraying liquid inlet end (12), a packing layer (6) is arranged between the barrel body (7) and the reverse spraying pipe (1), and a spray head is arranged above the packing layer (6) close to the flue gas inlet end (11). The utility model discloses realize the rapid cooling and the washing of high temperature flue gas in an equipment, shortened the gas cleaning flow, saved construction investment and land and used, improved the safety and stability nature of system.
Description
Technical Field
The utility model belongs to the chemical industry equipment field, concretely relates to a device that is used for cooling washing of waste sulfuric acid schizolysis flue gas.
Background
The technology for recovering sulfuric acid by cracking waste acid is mainly divided into a dry method technology and a wet method technology, wherein the dry method technology is used for washing sulfur dioxide-containing flue gas generated by burning and cracking waste acid and controlling the temperature of the flue gas after washing so as to ensure the high quality of finished acid and the water balance of a subsequent acid making system. Because the flue gas contains sulfur dioxide and a small amount of sulfur trioxide, the temperature of the flue gas which is discharged from the cracking furnace is required to be kept higher than the dew point after waste heat recovery (namely before the flue gas is washed) so as to ensure that dew point corrosion does not occur. The temperature of the flue gas before the existing device is washed is generally kept to be more than or equal to 320 ℃.
The invention of Chinese patent CN1751984A discloses a process for producing sulfuric acid by high-temperature cracking of waste alkylated sulfuric acid, which comprises a waste acid cracking purification section, a conversion section and a dry absorption section, wherein the waste acid treatment process is used for cracking the waste sulfuric acid at the high temperature of 1000-1100 ℃, and the qualified sulfuric acid product is produced by acid cleaning purification, twice contact conversion and twice absorption, and is used for an alkylation device for reuse, and simultaneously the purpose of protecting the environment is achieved, the raw material used in the process is single alkylated waste sulfuric acid with the concentration of 85-90%, and the recovery rate of the waste sulfuric acid can reach 90%.
The Chinese invention patent CN105480953A discloses a process for cracking alkylated waste acid by using sulfur as fuel, namely a process for producing sulfuric acid by cracking alkylated waste acid in a high-temperature environment generated by sulfur combustion, which comprises the procedures of cracking waste sulfuric acid at high temperature, recovering heat of a waste heat boiler, carrying out closed pickling purification, carrying out twice conversion, carrying out twice absorption, carrying out tail gas absorption and the like, and producing a qualified sulfuric acid product. Compared with the commonly used gas fuels such as natural gas, liquefied gas and the like, the alkylation waste acid cracking process using sulfur as the fuel converts the fuel into the product, thereby greatly reducing the operation cost of the device. But the invention does not disclose how to cool and wash the spent sulfuric acid cracking flue gas quickly.
In the existing process, the cooling and washing of high-temperature flue gas are completed by two independent devices, and circulating tanks are required to be respectively arranged, so that the equipment cost is higher, the occupied area is larger, the civil engineering cost is higher, and an intermediate connecting pipeline is arranged, so that more devices are needed, the flow is longer, and the leakage hidden danger is larger.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the device for cooling and washing the waste sulfuric acid cracking flue gas is provided aiming at the defects existing in the prior art. The device of the utility model shortens the process flow, saves the construction investment and the land use, and has high efficiency, convenience and safety and stability.
In order to solve the technical problem, the utility model provides a device for cooling washing of waste sulfuric acid schizolysis flue gas, including following part:
a device for cooling and washing waste sulfuric acid cracking flue gas comprises the following components:
the reverse spraying device comprises a barrel 7, the barrel 7 is connected with the liquid collecting tank 3, a reverse spraying pipe 1 is arranged in the barrel 7, one end of the reverse spraying pipe 1 is a flue gas inlet end 11, the other end of the reverse spraying pipe is a reverse spraying liquid inlet end 12, a packing layer 6 is arranged between the barrel 7 and the reverse spraying pipe 1, and a spray nozzle is arranged above the packing layer 6, close to the flue gas inlet end 11.
According to some embodiments of the utility model, still include contrary circulating pump 2 that spouts, contrary circulating pump 2's of spouting one end with contrary spray liquid entry end 12 is connected, the other end with collecting tank 3 is connected.
According to some embodiments of the utility model, still including spraying circulating pump 4, the one end that sprays circulating pump 4 is connected with water-cooled heat exchanger 5, the other end with collecting tank 3 is connected, water-cooled heat exchanger 5 with the shower nozzle is connected.
According to the utility model discloses a some embodiments, liquid in the collecting tank 3 by spray 4 behind the pressurization process become after the cooling of water-cooled heat exchanger 5 spray liquid and pass through the shower nozzle sprays on the packing layer 6.
According to the utility model discloses a some embodiments are through adjusting thereby the temperature of the circulating water volume of water-cooled heat exchanger 5 in order to adjust the spray liquor realizes the regulation to the exhanst gas outlet temperature, and general exhanst gas outlet flue gas temperature is less than or equal to 40 ℃.
According to some embodiments of the utility model, be provided with watering end 9 and flue gas outlet end 8 on the barrel 7.
According to some embodiments of the present invention, the reverse spray circulation pump 2 and the spray circulation pump 4 are provided with the waste liquid outlet end 10.
According to some embodiments of the present invention, the sprinkler head is along the circumferential uniform distribution of the barrel 7.
According to some embodiments of the invention, the number of spray heads is 1-3, preferably 1-2.
According to some embodiments of the present invention, the thickness of the packing layer 6 is 3 to 7, preferably 4.5 to 5.5 meters.
According to some embodiments of the present invention, the end surface formed by the nozzle is parallel to the two end surfaces of the packing layer 6.
According to some embodiments of the invention, the end face that the shower nozzle formed with the terminal surface of contrary hydrojet entry end is parallel.
The utility model carries out quenching and washing to the waste sulfuric acid pyrolysis gas by the following method:
after waste heat recovery, flue gas with the temperature of less than or equal to 420 ℃ enters the reverse spray pipe 1 from the flue gas inlet end 11 of the reverse spray pipe 1, and is in reverse contact with reverse spray liquid sprayed upwards from the bottom of the reverse spray pipe 1 in the pipe to form a gas-liquid mixing area, so that the liquid is evaporated, sensible heat of the flue gas is converted into latent heat, and the temperature of the flue gas is rapidly reduced to be below 80 ℃. The cooled flue gas, the un-evaporated water and the dilute acid flow out from the bottom of the reverse spray pipe 1, the liquid returns to the liquid collecting tank 3 for recycling, the un-condensed gas upwards passes through the packing layer 6 from the lower part of the packing layer 6, contacts with the spray liquid sprayed from the upper part of the packing layer 6 to further cool and remove ash in the flue gas, and finally is discharged through the flue gas outlet end 8 to enter the subsequent acid making process. The reverse spraying liquid is pumped out from the liquid collecting tank 3 by the reverse spraying circulating pump 2 and is pressurized to a reverse spraying nozzle to be sprayed out, and the spraying liquid (the difference between the spraying liquid and the reverse spraying liquid is that the temperature of the spraying liquid is lower than that of the reverse spraying liquid) is pumped out from the liquid collecting tank 3 by the spraying circulating pump 4, is cooled by the water-cooled heat exchanger 5 and is then conveyed to the spraying nozzle positioned at the upper part of the packing layer 6 to be sprayed out.
The utility model discloses final exhaust flue gas temperature is confirmed according to the required water yield of follow-up system acid, and temperature regulation is through adjusting the circulating water yield of water cooled heat exchanger 5 is realized. And the excessive moisture condensed in the flue gas quenching and cleaning process is discharged by the reverse spraying circulating pump 2 or the spraying circulating pump 4.
The utility model has the advantages that:
the utility model discloses realize the rapid cooling and the washing of high temperature flue gas in an equipment, shortened the gas cleaning flow, saved construction investment and land and used, improved the safety and stability nature of system.
Drawings
FIG. 1 is a schematic process flow diagram of quench washing of spent sulfuric acid cracked flue gas using an apparatus according to one embodiment of the present invention;
wherein the reference numerals are:
1-reverse spraying pipe; 2-reverse spraying circulating pump; 3-a liquid collecting tank; 4-spraying a circulating pump; 5-water cooling heat exchanger; 6-a filler layer; 7-a cylinder body; 8-flue gas outlet end; 9-adding a water port end; 10-the effluent outlet end, 11-the flue gas inlet end and 12-the reverse spray inlet end.
Detailed Description
The present invention will be further illustrated by the following examples. The following example employs an apparatus as shown in fig. 1 to perform quench scrubbing of spent sulfuric acid cracking flue gas.
The utility model provides a device for cooling washing of waste sulfuric acid schizolysis flue gas, including following part (as shown in figure 1):
a device for cooling and washing waste sulfuric acid cracking flue gas comprises the following components:
the liquid collecting device comprises a barrel 7, wherein the barrel 7 is connected with a liquid collecting tank 3, a reverse spraying pipe 1 is arranged in the barrel 7, one end of the reverse spraying pipe 1 is a flue gas inlet end 11, the other end of the reverse spraying pipe is a reverse spraying liquid inlet end 12, a packing layer 6 is arranged between the barrel 7 and the reverse spraying pipe 1, and a spray head is arranged above the packing layer 6, close to the flue gas inlet end 11;
the reverse spraying circulating pump 2 is connected with the reverse spraying liquid inlet end 12 at one end and is connected with the liquid collecting tank 3 at the other end;
one end of the spraying circulating pump 4 is connected with a water-cooling heat exchanger 5, the other end of the spraying circulating pump 4 is connected with the liquid collecting tank 3, and the water-cooling heat exchanger 5 is connected with the spray head;
the cylinder body 7 is provided with a water adding port end 9 and a smoke outlet end 8;
the reverse spray circulating pump 2 and the spray circulating pump 4 are provided with a waste liquid outlet end 10.
Example 1
A device for cooling and washing waste sulfuric acid cracking flue gas comprises: the equipment main part (barrel 7) is the entire body of glass steel material, the material of contrary spray tube 1 and contrary nozzle also is glass steel, pack in the packing layer 6 is the crisscross filler of polypropylene oblique ripples literary composition, contrary circulating pump 2 that spouts with it is the engineering plastic pump to spray circulating pump 4, water-cooled heat exchanger 5 is the plate heat exchanger of 254SMO material.
Use natural gas as the alkylation waste sulfuric acid recovery unit of heat supply source, the flue gas that the schizolysis produced falls to 320 ℃ after waste heat recovery and gets into the utility model discloses an in the device, flue gas pressure is-3.5 kpa, 20 meters of lift of circulating pump 2 are spouted in the contrary, 20 meters of lift of circulating pump 4 spray, the liquid temperature is 65 ℃ in the collecting tank 3, and the spray liquid warp water-cooled heat exchanger 5 back temperature is 38 ℃, and equipment export flue gas temperature is 39 ℃.
Example 2
A device for cooling and washing waste sulfuric acid cracking flue gas comprises: the equipment main part (barrel 7) is the entire body of glass steel material, the material of contrary spray tube 1 and contrary nozzle also is glass steel, pack in the packing layer 6 and be polypropylene haler ring, contrary circulating pump 2 that spouts with it is the engineering plastic pump to spray circulating pump 4, water-cooled heat exchanger 5 is the plate heat exchanger of 254SMO material.
In the alkylation waste sulfuric acid recovery unit who uses catalysis dry gas as the heat supply source, the flue gas that the schizolysis produced drops to 350 ℃ after waste heat recovery and gets into the utility model discloses an in the device, flue gas pressure is-3.5 kpa, 2 lifts 20 meters of circulating pump are spouted in the contrary, 20 meters of lift of circulating pump 4 spray, the liquid temperature is 65 ℃ in the collecting tank 3, and the spray liquid warp water-cooled heat exchanger 5 back temperature is 36 ℃, and equipment export flue gas temperature is 37 ℃.
Example 3
A device for cooling and washing waste sulfuric acid cracking flue gas comprises: the equipment main part (barrel 7) is the entire body of glass steel material, contrary spray tube 1 and contrary nozzle material also are glass steel, pack in the packing layer 6 is the polypropylene haler ring, contrary circulating pump 2 that spouts with it is the engineering plastic pump to spray circulating pump 4, water-cooled heat exchanger 5 is the plate heat exchanger of 254SMO material.
Use liquid sulphur as the alkylation waste sulfuric acid recovery unit of heat supply source, the flue gas that the schizolysis produced falls to 350 ℃ after waste heat recovery and gets into the utility model discloses an in the device, flue gas pressure is-4 kpa, 20 meters of lift of circulating pump 2 are spouted in the contrary, 20 meters of lift of circulating pump 4 spray, the liquid temperature is 66 ℃ in the collecting tank 3, and the spray liquid warp water-cooled heat exchanger 5 back temperature is 40 ℃, and equipment export flue gas temperature is 41 ℃.
Example 4
A device for cooling and washing waste sulfuric acid cracking flue gas comprises: the equipment main part (barrel 7) is the entire body of glass steel material, contrary spray tube 1 and contrary nozzle material also are glass steel, pack in the packing layer 6 for the crisscross filler of polypropylene oblique ripples literary composition, contrary circulating pump 2 that spouts with it is the fluoroplastic pump to spray circulating pump 4, water-cooled heat exchanger 5 is the plate heat exchanger of 254SMO material.
In the alkylation waste sulfuric acid recovery unit who uses hydrogen sulfide as the heat supply source, the flue gas that the schizolysis produced through waste heat recovery after the temperature drop to 350 ℃ get into the utility model discloses an in the device, flue gas pressure is-2 kpa, 20 meters of lift of circulating pump 2 are spouted in the contrary, 20 meters of lift of circulating pump 4 spray, liquid temperature is 65 ℃ in the collecting tank 3, and the temperature is 36 ℃ behind the water-cooled heat exchanger for the spray liquid, and equipment export flue gas temperature is 37 ℃.
Example 5
A device for cooling and washing waste sulfuric acid cracking flue gas comprises: the equipment main part (barrel 7) is the entire body of glass steel material, contrary spray tube 1 and contrary nozzle material also are glass steel, pack in the packing layer 6 for the crisscross filler of polypropylene oblique ripples literary composition, contrary circulating pump 2 that spouts with it is the fluoroplastic pump to spray circulating pump 4, water-cooled heat exchanger 5 is the plate heat exchanger of 254SMO material.
In the acetylene waste sulfuric acid recovery unit who uses the sour gas of sulfur containing hydrogen sulfide as the heat supply source, the flue gas that the schizolysis produced through waste heat recovery after the temperature drop to 400 ℃ get into the utility model discloses an in the device, flue gas pressure is-4 kpa, 20 meters of lift of circulating pump 2 are spouted in the contrary, 20 meters of lift of circulating pump 4 spray, the liquid temperature is 65 ℃ in the collecting tank 3, and the spray liquid warp the water-cooled heat exchanger 5 after the temperature is 36 ℃, equipment export flue gas temperature is 37 ℃.
Example 6
A device for cooling and washing waste sulfuric acid cracking flue gas comprises: the equipment main part (barrel 7) is the entire body of glass steel material, contrary spray tube 1 and contrary nozzle material also are glass steel, pack in the packing layer 6 is the polypropylene haler ring, contrary circulating pump 2 that spouts with it is the engineering plastic pump to spray circulating pump 4, water-cooled heat exchanger 5 is the plate heat exchanger of 254SMO material.
Use natural gas as the dye intermediate waste sulfuric acid of heat supply source to retrieve and produce and send out the nicotinic acid device, the flue gas that the schizolysis produced is through waste heat recovery back temperature drop to 420 ℃ and get into the utility model discloses an in the device, flue gas pressure is-4 kpa, 20 meters of lift of circulating pump 2 are spouted in the contrary, 20 meters of lift of circulating pump 4 spray, the liquid temperature is 60 ℃ in the collecting tank 3, and the spray liquid warp water-cooled heat exchanger 5 back temperature is 30 ℃, and equipment export flue gas temperature is 31 ℃.
Example 7
A device for cooling and washing waste sulfuric acid cracking flue gas comprises: the equipment main part (barrel 7) is the entire body of glass steel material, contrary spray tube 1 and contrary nozzle material also are glass steel, pack in the packing layer 6 is the polypropylene haler ring, contrary circulating pump 2 that spouts with it is the engineering plastic pump to spray circulating pump 4, water-cooled heat exchanger 5 is the plate heat exchanger of 254SMO material.
Use hydrogen as the waste sulfuric acid recovery unit of fluorine chemical industry of heat supply source, the flue gas that the schizolysis produced falls to 380 ℃ after waste heat recovery and gets into the utility model discloses an in the device, flue gas pressure is-4 kpa, 20 meters of lift of circulating pump 2 are spouted in the contrary, 20 meters of lift of circulating pump 4 spray, the liquid temperature is 66 ℃ in the collecting tank 3, and the spray liquid warp water-cooled heat exchanger 5 after the temperature is 37 ℃, equipment export flue gas temperature is 38 ℃.
It should be noted that the above embodiments are only used for explaining the present invention, and do not constitute any limitation to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. Modifications may be made to the invention as specified within the scope of the claims and modifications may be made without departing from the scope and spirit of the invention. Although the present invention has been described herein with reference to particular means, materials and embodiments, it is not intended to be limited to the particulars disclosed herein, but rather the present invention extends to all other methods and applications having the same functionality.
Claims (10)
1. A device for cooling and washing waste sulfuric acid cracking flue gas is characterized in that,
the device comprises a barrel body (7) and a liquid collecting tank (3), wherein the barrel body (7) is connected with the liquid collecting tank (3), a reverse spraying pipe (1) is arranged in the barrel body (7), one end of the reverse spraying pipe (1) is a flue gas inlet end (11), the other end of the reverse spraying pipe is a reverse spraying liquid inlet end (12), a packing layer (6) is arranged between the barrel body (7) and the reverse spraying pipe (1), and a spray head is arranged above the flue gas inlet end (11) and close to the packing layer (6).
2. An apparatus according to claim 1, characterized in that the apparatus further comprises a reverse spray circulation pump (2), one end of the reverse spray circulation pump (2) being connected to the reverse spray inlet port (12) and the other end being connected to the sump (3).
3. The device according to claim 2, characterized in that the device further comprises a spray circulation pump (4), one end of the spray circulation pump (4) is connected with a water-cooled heat exchanger (5), the other end is connected with the liquid collecting tank (3), and the water-cooled heat exchanger (5) is connected with the spray head.
4. The device according to claim 1 or 2, characterized in that the cartridge (7) is provided with a filler end (9) and a flue gas outlet end (8).
5. The arrangement according to claim 3, characterized in that the reverse spray circulation pump (2) and the spray circulation pump (4) are provided with a waste liquid outlet end (10).
6. Device according to claim 1, characterized in that the spray heads are evenly distributed in the circumferential direction of the cylinder (7).
7. Device according to claim 1 or 2, characterized in that the thickness of the packing layer (6) is 3-7 meters.
8. The device according to claim 1 or 6, characterized in that the spray head forms an end face which is parallel to both end faces of the packing layer (6).
9. A device according to claim 1 or 6, characterized in that the spray head forms an end surface parallel to the end surface of the inlet end (12) for the reverse spray.
10. The apparatus of claim 6, wherein the number of spray heads is 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921793159.8U CN212701225U (en) | 2019-10-23 | 2019-10-23 | Device for cooling and washing waste sulfuric acid cracking flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921793159.8U CN212701225U (en) | 2019-10-23 | 2019-10-23 | Device for cooling and washing waste sulfuric acid cracking flue gas |
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| Publication Number | Publication Date |
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| CN212701225U true CN212701225U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921793159.8U Active CN212701225U (en) | 2019-10-23 | 2019-10-23 | Device for cooling and washing waste sulfuric acid cracking flue gas |
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| CN (1) | CN212701225U (en) |
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- 2019-10-23 CN CN201921793159.8U patent/CN212701225U/en active Active
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