CN108531225B - Deep desulfurization and oil removal device and process for self-made water gas in ceramic industry - Google Patents
Deep desulfurization and oil removal device and process for self-made water gas in ceramic industry Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
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- C10K1/026—Dust removal by centrifugal forces
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/20—Purifying combustible gases containing carbon monoxide by treating with solids; Regenerating spent purifying masses
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- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
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Abstract
The invention relates to a self-made water gas deep desulfurization and oil removal device in the ceramic industry, which comprises a water gas main pipe, wherein a plurality of water gas branch pipes are connected in parallel with the water gas main pipe, each water gas branch pipe is respectively provided with a desulfurization and oil removal tower, the water gas branch pipe at the air inlet end of the desulfurization and oil removal tower is provided with a pre-oil removal device, the desulfurization and oil removal tower is filled with air from the lower part and discharged from the top, the air inlet direction of an air inlet pipe arranged at the lower part of the desulfurization and oil removal tower and the airflow direction in the desulfurization and oil removal tower form an included angle, the desulfurization and oil removal tower sequentially comprises an arc spiral bent plate, a rotational flow oil removal section, an oil removal dehydration section, an amplification air distribution section, a first desulfurization section and a second desulfurization section from bottom to top, one end of the arc. The device has the advantages of high desulfurization efficiency, simple equipment, low investment and operation cost, easy control and management and the like, and is an economic and efficient water gas deep desulfurization and oil removal device.
Description
Technical Field
The invention relates to the field of atmospheric pollution control, in particular to a self-made water gas deep desulfurization and oil removal device and process in the ceramic industry.
Background
In the face of increasingly severe atmospheric pollution situations, countries issue and implement a series of environmental protection policies and related atmospheric pollution abatement action schemes successively, wherein the implementation of clean coal use plans effectively improves the problem of atmospheric pollution caused by coal use. Among a plurality of coal clean use modes, the technology of producing combustible gas (water gas) by coal gasification to replace direct combustion of coal is a more efficient and clean coal use mode. At present, the coal gasification technology is most commonly applied in the building material industry, especially the ceramic industry. Although water gas combustion produces lower concentrations of flue gas pollutants, particularly lower concentrations of particulate matter, than direct combustion of coal, such as SO2The emission concentration of the acid gas is still high. The reason is that about 95 percent of sulfur (S) in coal is H in the process of producing water gas2S and organic sulfur enter water gas, most of factory gas stations are not provided with desulfurization facilities at present, and SO is finally used in the water gas combustion process2The situation exists in flue gas. In addition, although the factory gas station is provided with an electric tar precipitator, most of tar is removed, a small amount of tar is still present in the water gas, and smoke pollutants are generated along with the combustion and decomposition of the water gas. Therefore, if deep desulfurization and oil removal can be carried out on the water gas before the water gas is combusted, the concentration of flue gas pollutants discharged by the combustion of the water gas is lower, the purpose of clean coal utilization is better met, and the problem of subsequent flue gas desulfurization is also avoided.
At present, few patents and technical reports are reported for water gas desulfurization in China, but in factories which take coal gas, coke oven gas and natural gas as raw materials to prepare methanol, synthetic ammonia and synthetic oil, gas fine desulfurization processes are adopted, and methods such as a low-temperature methanol absorption method, an NHD (polyethylene glycol dimethyl ether) absorption method, a dry-process fine desulfurization method and the like are generally adopted. In addition, patent 201610115440.0 discloses a method for decarbonizing and desulfurizing raw gas, which includes steps of dehydration, filtration, a first cooling process, a second cooling process, etc., but the method has many equipments and complex process, especially cooling the gas to-90 to-60 ℃, increasing the pressure to 3.5 to 8Mpa, and has high requirements for process equipment and extremely high energy consumption. Patent 201510375624.6 discloses a super fine desulfurizer and its preparation method, wherein the super fine desulfurizer is solid composed of carrier and active component, and is prepared by excess impregnation method, and the adopted desulfurization process is dry process. Patent 201410632507.9 discloses a deep fine desulfurization process for synthetic raw material gas and a device thereof, which realizes deep desulfurization by several stages of titanium-based cobalt molybdenum catalysts, several stages of zinc oxide desulfurizer and one stage of multifunctional fine desulfurizer, but the desulfurization process adopted by the technology is a dry process, and has more equipment and complex process.
Therefore, at present, a plurality of raw material gas desulfurization methods are developed in the industries of methanol synthesis, ammonia synthesis and the like at home, but the process equipment is complex, the investment and operation cost is high, the method cannot be directly copied and applied to the field of taking water gas as gas fuel, and meanwhile, the method is lack of desulfurization technical reserves in the field in China.
Disclosure of Invention
Aiming at the technical problems in the prior art, one of the purposes of the invention is as follows: provides a self-made water gas deep desulfurization and oil removal device in ceramic industry, which aims at the composition characteristic of water gas and reduces SO in the flue gas discharged by water gas combustion2Concentration, and deep desulfurization and oil removal of water gas in the ceramic industry are realized.
Aiming at the technical problems in the prior art, the second purpose of the invention is as follows: provides a self-made water gas deep desulfurization and oil removal process in the ceramic industry, which aims at the composition characteristic of water gas and reduces SO in the flue gas discharged by water gas combustion2Concentration ofAnd deep desulfurization and oil removal of water gas in the ceramic industry are realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
a self-made water gas deep desulfurization and oil removal device in the ceramic industry comprises a water gas main pipe, a plurality of water gas branch pipes are connected in parallel with the water gas main pipe, each water gas branch pipe is provided with a desulfurization and oil removal tower, the water gas branch pipe at the air inlet end of the desulfurization and oil removal tower is provided with a pre-oil removal device, the desulfurization and oil removal tower is provided with air from the lower part and air from the top part, the air inlet direction of an air inlet pipe arranged at the lower part of the desulfurization and oil removal tower and the air flow direction in the desulfurization and oil removal tower form an included angle, the desulfurization and oil removal tower sequentially comprises an, enlarge gas distribution section, first desulfurization section and second desulfurization section, the intake pipe is connected to the one end of arc spiral bent plate, and the desulfurization deoiling tower inside wall is connected to the other one end of arc spiral bent plate, is equipped with the solid absorption packing layer in the first desulfurization section, is equipped with the solid absorption packing layer in the second desulfurization section.
Furthermore, the pre-oil removing device is a cylindrical barrel with a ceramic raschig ring arranged inside, and an oil collecting hopper is arranged at the middle bottom of the cylindrical barrel.
Further, the cyclone oil removing section comprises an air distribution cover cylinder, an air distribution supporting layer, air distribution blades and an air distribution blind plate, wherein the air distribution supporting layer, the air distribution blades and the air distribution blind plate are arranged in the air distribution cover cylinder, and the air distribution blades are arranged below the air distribution blind plate.
Further, the oil removing and dewatering section comprises a dewatering supporting layer and a wave-shaped folding plate, and the wave-shaped folding plate is fixedly connected with the dewatering supporting layer.
Furthermore, the amplifying gas distribution section comprises a bell mouth-shaped gas distribution port with a gradually expanding cross section from bottom to top, and a perforated gas distribution plate is arranged above the gas distribution port.
Further, the first desulfurization section comprises a first support frame, a first screen, a first support layer and a solid absorption packing layer; the second desulfurization section comprises a second support frame, a second screen, a second supporting layer, a solid adsorption packing layer and a top fixing net.
Furthermore, the desulfurization and oil removal tower is provided with a bypass pipeline which is communicated with the water gas branch pipe and a pipeline at the gas outlet end of the desulfurization and oil removal tower.
Furthermore, the bypass pipeline is provided with a bypass valve, each water gas branch pipe is respectively provided with an air inlet valve, and the pipeline at the air outlet end of each desulfurization and oil removal tower is respectively provided with an air outlet valve.
A self-made water gas deep desulfurization and oil removal process in the ceramic industry by using the device, which comprises the following steps,
1) the water gas from a factory gas station enters each water gas branch pipe through a water gas main pipe, firstly the water gas enters a pre-oil removal device, and large oil droplets and particles are removed;
2) then the water gas is guided by an air inlet pipe and an arc spiral bent plate from the bottom of the desulfurization and oil removal tower to tangentially enter the desulfurization and oil removal tower, then enters a rotational flow oil removal section, and oil drops, water drops and particles in the water gas are thrown to the inner wall surface of the tower under the action of centrifugal force to be removed;
3) the water gas continuously enters the oil removal dehydration section upwards for further oil removal and dehydration;
4) then the water gas upwards enters an amplifying gas distribution section, the flow rate of the gas is reduced, and the gas is uniformly distributed;
5) the water gas continuously enters the first desulfurization section upwards, and the water gas realizes H through contact reaction with a desulfurizing agent in the first desulfurization section2Removing acid gases such as S and the like, and further dehydrating and removing oil;
6) then the gas enters a second desulfurization section upwards, and organic sulfur in the water gas is absorbed and removed through contact with an adsorbent in the second desulfurization section, and meanwhile, the water is further dehydrated and deoiled; and finally spraying the purified water gas into a ceramic kiln through a burner for combustion.
A desulfurizing agent is Cu/Fe-loaded activated carbon particles, the size of the Cu/Fe-loaded activated carbon particles is 3-10 mm in diameter and 5-10 mm in length, the Cu/Fe-loaded activated carbon particles are prepared by an impregnation method, wherein a carrier is granular activated carbon, active components are copper nitrate and ferric nitrate, and an adsorbent is one of activated carbon, activated carbon fibers and a molecular sieve.
In summary, the present invention has the following advantages:
the self-made water gas deep desulfurization and oil removal device (1) in the ceramic industry integrates the functions of physical interception, centrifugation, rotational flow, absorption, adsorption and the like, has compact equipment structure, small volume, easy operation and high pollutant removal efficiency, can realize the simultaneous high-efficiency purification of various pollutants such as sulfide, tar and the like in water gas, and has the removal rate of sulfide and tar higher than 90%; (2) the device and equipment of the invention are simple, the operation and management are convenient, and the overall investment and the operation cost are low. In addition, the process arrangement is flexible, each gas branch pipe can be provided with one set of small device according to the actual situation, and one gas station can be provided with one set of large device. The arrangement of a plurality of small devices has the advantages that each device is overhauled without influencing the operation of other devices, the integral water gas can still be deeply purified, and the large device has the advantages of single device and convenient operation and management; (3) the invention can be applied to deep desulfurization and deoiling treatment of water gas in ceramic industry in China, can also be applied to deep desulfurization and deoiling treatment of water gas in other building material industries such as cement, glass and the like and other industries, and has the characteristics of wide application range, strong adaptability and the like.
The device has the advantages of high desulfurization efficiency, simple equipment, low investment and operation cost, easy control and management and the like, and is an economic and efficient water gas deep desulfurization and oil removal device.
The deep desulfurization and oil removal process for self-made water gas in ceramic industry organically combines the technologies of physical absorption, chemical reaction, physical adsorption and the like to realize H in the water gas2The method has the advantages of high pollutant removal efficiency, simple process, low investment and operation cost and the like.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a homemade water gas deep desulfurization and oil removal device in the ceramic industry.
FIG. 2 is a schematic structural diagram of a single water gas branch pipe and a desulfurization and oil removal tower of the homemade water gas deep desulfurization and oil removal device in the ceramic industry.
Wherein, fig. 1 and fig. 2 include:
1 is by pass line, 2 is the air inlet valve, 3 is the deoiling device in advance, 4 is desulfurization deoiling tower, 5 is the bleeder valve, 6 is arc spiral bent plate, 7 is the whirl deoiling section, 8 is the deoiling dehydration section, 9 is for enlargeing the gas distribution section, 10 is first desulfurization section, 11 is the second desulfurization section, 12 is the by pass valve, 13 is the valve that outgases, 14 is the water gas house steward, 15 is the water gas branch pipe.
Detailed Description
The present invention will be described in further detail below.
Examples 1,
As shown in figure 1 and figure 2, a self-made water gas deep desulfurization and oil removal device in ceramic industry comprises a water gas main pipe, a plurality of water gas branch pipes are connected in parallel with the water gas main pipe, each water gas branch pipe is respectively provided with a desulfurization and oil removal tower 4, the water gas branch pipe at the air inlet end of the desulfurization and oil removal tower 4 is provided with a pre-oil removal device 3, the desulfurization and oil removal tower 4 is provided with air from the lower part and air from the top, the air inlet direction of an air inlet pipe arranged at the lower part of the desulfurization and oil removal tower 4 and the air flow direction in the desulfurization and oil removal tower 4 form an included angle, the desulfurization and oil removal tower 4 sequentially comprises an arc spiral bent plate 6, a rotational flow oil removal section 7, an oil removal dehydration section 8, an amplification air distribution section 9, a first desulfurization section 10 and a second desulfurization section 11 from bottom to top, one end of the arc spiral bent plate 6 is connected with, a solid adsorption packing layer is arranged in the second desulfurization section 11. An oil drain valve 5 is arranged at the bottom of the desulfurization and oil removal tower 4. The pre-oil removing device 3 is a cylindrical barrel with a ceramic raschig ring arranged inside, and an oil collecting hopper is arranged at the middle bottom of the cylindrical barrel. The cyclone oil removing section 7 comprises an air distribution cover cylinder, an air distribution supporting layer, an air distribution blade and an air distribution blind plate, wherein the air distribution supporting layer, the air distribution blade and the air distribution blind plate are arranged in the air distribution cover cylinder, and the air distribution blade is arranged below the air distribution blind plate. The de-oiling dewatering section 8 comprises a dewatering support layer and a corrugated flap which is fixedly connected to the dewatering support layer. The amplifying gas distribution section 9 comprises a bell mouth-shaped gas distribution port with a gradually expanding cross section from bottom to top, and a perforated gas distribution plate is arranged above the gas distribution port. The first desulfurization section 10 comprises a first support frame, a first screen, a first support layer and a solid absorption packing layer; the second desulfurization section 11 comprises a second support frame, a second screen, a second supporting layer, a solid adsorption packing layer and a top fixing net. The desulfurization and oil removal tower 4 is provided with a bypass pipeline 1, and the bypass pipeline 1 is communicated with a water gas branch pipe and a pipeline at the gas outlet end of the desulfurization and oil removal tower 4. The bypass pipeline 1 is provided with a bypass valve 12, each water gas branch pipe is provided with an air inlet valve 2, and the pipeline at the air outlet end of each desulfurization and oil removal tower 4 is provided with an air outlet valve 13.
The basic principle of the invention is that: the water gas firstly enters a pre-oil removal device 3, partial oil drops and particles are removed by reducing the gas speed, mechanical collision, physical interception and the like, and finally the water gas is collected in an oil collecting hopper. The water gas after pre-deoiling passes through the desulfurization and deoiling tower 4 from the bottom of the desulfurization and deoiling tower 4 through the arc-shaped spiral bent plate 6 and the rotational flow deoiling section 7, then flows upwards through the desulfurization and deoiling tower 4 in a high-speed rotational flow mode, and oil droplets, water droplets and particulate matters with large particle sizes in the water gas are separated and removed by centrifugal action. Then the water gas enters the oil removing and dewatering section 8 and is blocked by the wave-shaped folded plate to remove most of oil drops, water drops and particles in the water gas. The water gas after oil removal and dehydration enters the amplifying gas distribution section 9 upwards, so that the gas flow rate is reduced on one hand, and the gas is uniformly distributed through the perforated gas distribution plate on the other hand. The uniformly distributed water gas upwards enters a first desulfurization section 10, the gas fully contacts with Cu/Fe-loaded activated carbon particles in the upward flowing process, and H in the gas2S and Cu in Cu/Fe-loaded activated carbon particles2+、Fe3+ reacting to produce CuS and Fe2S3Removing the precipitate, and further removing oil, dehydrating and adsorbing part of H in the process section2S and organic sulfur. The water gas enters a second desulfurization section 11 after passing through a first desulfurization section 10, the gas is fully contacted with the adsorbent in the upward flowing process, and organic sulfur and part of unremoved H in the gas2S is adsorbed and removed, and particles can be further removed by the process section. Finally, pollutants such as sulfide, tar, particulate matters and the like in the water gas are efficiently removed, and the water gas is deeply purified and then enters a ceramic finished kiln for combustion.
The ceramic industry self-made water gas deep desulfurization and oil removal process using the device is characterized in that: comprises the following steps of (a) carrying out,
1) the water gas from a factory gas station enters each water gas branch pipe through a water gas main pipe, firstly the water gas enters a pre-oil removal device 3, and large oil droplets and particles are removed;
2) then the water gas is guided by an air inlet pipe and an arc spiral bent plate 6 from the bottom of the desulfurization and oil removal tower 4 and tangentially enters the desulfurization and oil removal tower 4, then enters a rotational flow oil removal section 7, and oil drops, water drops and particles in the water gas are thrown to the inner wall surface of the tower under the action of centrifugal force to be removed;
3) the water gas continuously enters the oil removal dehydration section 8 upwards for further oil removal and dehydration;
4) then the water gas upwards enters an amplifying gas distribution section 9, the flow rate of the gas is reduced, and the gas is uniformly distributed;
5) the water gas continuously enters the first desulfurization section 10 upwards, and H is realized by the contact reaction of the water gas and a desulfurizing agent in the first desulfurization section 102Removing acid gases such as S and the like, and further dehydrating and removing oil;
6) then the gas enters the second desulfurization section 11 upwards, and organic sulfur in the water gas is removed by adsorption through contact with the adsorbent in the second desulfurization section 11, and meanwhile, the oil is further removed by dehydration; and finally spraying the purified water gas into a ceramic kiln through a burner for combustion.
The desulfurizer is Cu/Fe-loaded activated carbon particles, the sizes of the Cu/Fe-loaded activated carbon particles are 3-10 mm in diameter and 5-10 mm in length, the Cu/Fe-loaded activated carbon particles are prepared by an impregnation method, wherein a carrier is granular activated carbon, active components are copper nitrate and ferric nitrate, and an adsorbent is one of activated carbon, activated carbon fibers and a molecular sieve.
In summary, the present invention has the following advantages:
the self-made water gas deep desulfurization and oil removal device (1) in the ceramic industry integrates the functions of physical interception, centrifugation, rotational flow, absorption, adsorption and the like, has compact equipment structure, small volume, easy operation and high pollutant removal efficiency, can realize the simultaneous high-efficiency purification of various pollutants such as sulfide, tar and the like in water gas, and has the removal rate of sulfide and tar higher than 90%; (2) the device and equipment of the invention are simple, the operation and management are convenient, and the overall investment and the operation cost are low. In addition, the process arrangement is flexible, each gas branch pipe can be provided with one set of small device according to the actual situation, and one gas station can be provided with one set of large device. The arrangement of a plurality of small devices has the advantages that each device is overhauled without influencing the operation of other devices, the integral water gas can still be deeply purified, and the large device has the advantages of single device and convenient operation and management; (3) the invention can be applied to deep desulfurization and deoiling treatment of water gas in ceramic industry in China, can also be applied to deep desulfurization and deoiling treatment of water gas in other building material industries such as cement, glass and the like and other industries, and has the characteristics of wide application range, strong adaptability and the like.
The device has the advantages of high desulfurization efficiency, simple equipment, low investment and operation cost, easy control and management and the like, and is an economic and efficient water gas deep desulfurization and oil removal device.
The deep desulfurization and oil removal process for self-made water gas in ceramic industry organically combines the technologies of physical absorption, chemical reaction, physical adsorption and the like to realize H in the water gas2The method has the advantages of high pollutant removal efficiency, simple process, low investment and operation cost and the like.
Several specific examples are given below:
the average content of sulfide in the water gas produced by a gas station of a certain ceramic factory is 3g/Nm3The average concentration of tar content was 1.5g/Nm3。
1) The bypass valve 12 is closed and the bottom inlet valve 2 and the top outlet valve 13 of the device are opened.
2) The water gas from a factory gas station enters each water gas branch pipe through a water gas main pipe, each water gas branch pipe is connected with 1 set of desulfurization and oil removal device, firstly the water gas enters a pre-oil removal device 3 to remove large-particle oil drops and particles, wherein the diameter of the pre-oil removal device 3 is 4 times of the pipe diameter of each water gas branch pipe, and the length of the pre-oil removal device is 10 times of the pipe diameter of each branch pipe. The ceramic raschig ring has the diameter of 6mm and the length of 6 mm.
3) The water gas after pre-deoiling enters the device from the bottom of the desulfurizing and deoiling device through the guide of the arc-shaped spiral bent plate 6 in a tangential directionThe device sequentially comprises a rotational flow oil removing section 7, an oil removing and dehydrating section 8, an amplifying gas distribution section 9, a first desulfurization section 10 and a second desulfurization section 11 to realize H in water gas2High-efficiency purification of S, organic sulfur, tar and other pollutants. Wherein the first desulfurization section 10 is filled with Cu/Fe-loaded activated carbon particles with the size of 3mm in diameter and 5mm in length, and the second desulfurization section 11 is filled with activated carbon particles.
4) And spraying the purified water gas into the ceramic kiln through a burner by a pipeline for combustion.
The emission concentration of sulfide after water gas purification is 0.15g/Nm3The removal rate is 95%; the tar emission concentration is 0.1g/Nm3And the removal rate is 93.3 percent. Purifying SO in flue gas generated by combustion of front and rear water gas2The discharge concentrations were 500 and 25mg/Nm, respectively3It can be seen that the invention is applicable to ceramic flue gas SO2The purification efficiency is obvious, and the SO in the flue gas can be obviously reduced2And the subsequent flue gas treatment load is greatly reduced.
Examples 2,
The main structure of this embodiment is the same as that of embodiment 1, and the same parts are not described herein again, except that: the average content of sulfide in the water gas produced by a gas station of a certain ceramic factory is 3g/Nm3The average concentration of tar content was 1.5g/Nm3. As shown in fig. 1 and 2.
1) The bypass valve 12 is closed and the bottom inlet valve 2 and the top outlet valve 13 of the device are opened.
2) The water gas from a factory gas station enters each water gas branch pipe through a water gas main pipe, each water gas branch pipe is connected with 1 set of desulfurization and oil removal device, firstly, the water gas enters a pre-oil removal device 3 to remove large oil drops and particles, wherein the diameter of the pre-oil removal device 3 is 6 times of the pipe diameter of the water gas branch pipe, and the length of the pre-oil removal device is 12 times of the pipe diameter of the branch pipe. The ceramic raschig ring has the diameter of 12mm and the length of 12 mm.
3) The pre-deoiled water gas enters the device tangentially from the bottom of the desulfurization and deoiling device through the diversion of the arc-shaped spiral bent plate 6, sequentially passes through a rotational flow deoiling section 7, a deoiling and dehydrating section 8, an amplifying gas distribution section 9, a first desulfurization section 10 and a second desulfurization section 11, and H in the water gas is realized2S, organic sulfur, tar and other pollutantsHigh-efficiency purification. Wherein the first desulfurization section 10 is filled with Cu/Fe-loaded activated carbon particles with the size of 6mm in diameter and 7mm in length, and the second desulfurization section 11 is filled with activated carbon fibers.
4) And spraying the purified water gas into the ceramic kiln through a burner by a pipeline for combustion.
The emission concentration of sulfide after water gas purification is 0.17g/Nm3The removal rate is 94.3%; the tar emission concentration is 0.08g/Nm3The removal rate was 94.7%. Purifying SO in flue gas generated by combustion of front and rear water gas2The discharge concentrations were 500 and 28mg/Nm, respectively3It can be seen that the invention is applicable to ceramic flue gas SO2The purification efficiency is obvious, and the SO in the flue gas can be obviously reduced2And the subsequent flue gas treatment load is greatly reduced.
Examples 3,
The main structure of this embodiment is the same as that of embodiment 1, and the same parts are not described herein again, except that: the average content of sulfide in the water gas produced by a gas station of a certain ceramic factory is 3g/Nm3The average concentration of tar content was 1.5g/Nm3. As shown in fig. 1 and 2.
1) The bypass valve 12 is closed and the bottom inlet valve 2 and the top outlet valve 13 of the device are opened.
2) The water gas from a factory gas station enters each water gas branch pipe through a water gas main pipe, each water gas branch pipe is connected with 1 set of desulfurization and oil removal device, firstly the water gas enters a pre-oil removal device 3 to remove large-particle oil drops and particles, wherein the diameter of the pre-oil removal device 3 is 8 times of the pipe diameter of each water gas branch pipe, and the length of the pre-oil removal device is 15 times of the pipe diameter of each branch pipe. The ceramic raschig ring has the diameter of 15mm and the length of 15 mm.
3) The pre-deoiled water gas enters the device tangentially from the bottom of the desulfurization and deoiling device through the diversion of the arc-shaped spiral bent plate 6, sequentially passes through a rotational flow deoiling section 7, a deoiling and dehydrating section 8, an amplifying gas distribution section 9, a first desulfurization section 10 and a second desulfurization section 11, and H in the water gas is realized2High-efficiency purification of S, organic sulfur, tar and other pollutants. Wherein the first desulfurization section 10 is filled with Cu/Fe-loaded activated carbon particles with the size of 15mm in diameter and 15mm in length, and the second desulfurization section 11 is filled with a molecular sieve.
4) And spraying the purified water gas into the ceramic kiln through a burner by a pipeline for combustion.
The emission concentration of sulfide after water gas purification is 0.2g/Nm3The removal rate is 93.3%; the tar emission concentration is 0.05g/Nm3And the removal rate is 96.7%. Purifying SO in flue gas generated by combustion of front and rear water gas2The discharge concentrations were 500 and 33mg/Nm, respectively3It can be seen that the invention is applicable to ceramic flue gas SO2The purification efficiency is obvious, and the SO in the flue gas can be obviously reduced2And the subsequent flue gas treatment load is greatly reduced.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (7)
1. The utility model provides a pottery trade self-control water gas degree of depth desulfurization deoiling device which characterized in that: the device comprises a water gas main pipe, a plurality of water gas branch pipes are connected in parallel with the water gas main pipe, each water gas branch pipe is respectively provided with a desulfurization and oil removal tower, the water gas branch pipe at the air inlet end of the desulfurization and oil removal tower is provided with a pre-oil removal device, the desulfurization and oil removal tower is filled with air from the lower part and discharged from the top, the air inlet direction of an air inlet pipe arranged at the lower part of the desulfurization and oil removal tower and the air flow direction in the desulfurization and oil removal tower form an included angle, the desulfurization and oil removal tower sequentially comprises an arc spiral bent plate, a rotational flow oil removal section, an oil removal dehydration section, an amplification air distribution section, a first desulfurization section and a second desulfurization section from bottom to top, one end of the arc spiral bent plate is connected with the air inlet pipe, the other end of;
the cyclone oil removing section comprises an air distribution cover cylinder, an air distribution supporting layer, an air distribution blade and an air distribution blind plate, wherein the air distribution supporting layer, the air distribution blade and the air distribution blind plate are arranged in the air distribution cover cylinder, and the air distribution blade is arranged below the air distribution blind plate;
the oil removing and dewatering section comprises a dewatering supporting layer and a waveform folding plate, and the waveform folding plate is fixedly connected with the dewatering supporting layer;
the amplifying gas distribution section comprises a bell mouth-shaped gas distribution port with a gradually expanding cross section from bottom to top, and a perforated gas distribution plate is arranged above the gas distribution port.
2. The self-made water gas deep desulfurization and oil removal device in the ceramic industry according to claim 1, characterized in that: the pre-oil removing device is a cylindrical barrel with a ceramic raschig ring arranged inside, and an oil collecting hopper is arranged at the middle bottom of the cylindrical barrel.
3. The self-made water gas deep desulfurization and oil removal device in the ceramic industry according to claim 1, characterized in that: the first desulfurization section comprises a first support frame, a first screen, a first support layer and a solid absorption packing layer; the second desulfurization section comprises a second support frame, a second screen, a second supporting layer, a solid adsorption packing layer and a top fixing net.
4. The self-made water gas deep desulfurization and oil removal device in the ceramic industry according to claim 1, characterized in that: the desulfurization and oil removal tower is provided with a bypass pipeline which is communicated with the water gas branch pipe and a pipeline at the gas outlet end of the desulfurization and oil removal tower.
5. The self-made water gas deep desulfurization and oil removal device in the ceramic industry as recited in claim 4, characterized in that: the bypass pipeline is provided with a bypass valve, each water gas branch pipe is provided with an air inlet valve, and the pipeline at the air outlet end of each desulfurization and oil removal tower is provided with an air outlet valve.
6. A ceramic industry homemade water gas deep desulfurization degreasing process using the device of any one of claims 1 to 5, characterized in that: comprises the following steps of (a) carrying out,
1) the water gas from a factory gas station enters each water gas branch pipe through a water gas main pipe, firstly the water gas enters a pre-oil removal device, and large oil droplets and particles are removed;
2) then the water gas is guided by an air inlet pipe and an arc spiral bent plate from the bottom of the desulfurization and oil removal tower to tangentially enter the desulfurization and oil removal tower, then enters a rotational flow oil removal section, and oil drops, water drops and particles in the water gas are thrown to the inner wall surface of the tower under the action of centrifugal force to be removed;
3) the water gas continuously enters the oil removal dehydration section upwards for further oil removal and dehydration;
4) then the water gas upwards enters an amplifying gas distribution section, the flow rate of the gas is reduced, and the gas is uniformly distributed;
5) the water gas continuously enters the first desulfurization section upwards, and the water gas realizes H through contact reaction with a desulfurizing agent in the first desulfurization section2S, removing acid gas, and further dehydrating and removing oil;
6) then the gas enters a second desulfurization section upwards, and organic sulfur in the water gas is absorbed and removed through contact with an adsorbent in the second desulfurization section, and meanwhile, the water is further dehydrated and deoiled; and finally spraying the purified water gas into a ceramic kiln through a burner for combustion.
7. The self-made water gas deep desulfurization and oil removal process in the ceramic industry according to claim 6, characterized in that: the desulfurizer is Cu/Fe-loaded activated carbon particles, the Cu/Fe-loaded activated carbon particles are 3-10 mm in diameter and 5-10 mm in length, and are prepared by an impregnation method, wherein the carrier is granular activated carbon, the active components are copper nitrate and ferric nitrate, and the adsorbent is one of activated carbon and activated carbon fibers.
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| CN110559792A (en) * | 2019-09-09 | 2019-12-13 | 佛山市天地元一净化设备有限公司 | uniform air inlet structure of adsorption machine tank body |
| CN112812858A (en) * | 2021-03-10 | 2021-05-18 | 中冶华天南京工程技术有限公司 | Novel blast furnace gas dry method vertical desulfurizing tower |
| CN114735868A (en) * | 2022-04-20 | 2022-07-12 | 武汉理工大学 | Comprehensive treatment device for petrochemical wastewater |
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