CN112239684A - Coke oven gas desulfurization purification process and device based on complex iron catalyst - Google Patents
Coke oven gas desulfurization purification process and device based on complex iron catalyst Download PDFInfo
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- CN112239684A CN112239684A CN202010979596.XA CN202010979596A CN112239684A CN 112239684 A CN112239684 A CN 112239684A CN 202010979596 A CN202010979596 A CN 202010979596A CN 112239684 A CN112239684 A CN 112239684A
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- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
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Abstract
The invention relates to the technical field of fuel gas purification, in particular to a coke oven gas desulfurization purification process and a coke oven gas desulfurization purification device based on a complex iron catalyst. The invention relates to a coke oven gas desulfurization purification device, which comprises a desulfurization unit, a regeneration unit, a liquid seal tank, a pregnant solution tank, a complex iron catalyst storage tank, an alkali liquor storage tank and a sulfur foam tank; the coal gas inlet of the desulfurization unit is connected with sulfur-containing coke oven coal gas, the coal gas outlet of the desulfurization unit is connected with a coal gas collecting device, the desulfurization liquid outlet of the desulfurization unit is connected with a liquid seal tank, the liquid seal tank is connected with the inlet of a pregnant solution tank, the inlet of the pregnant solution tank is also connected with a complex iron catalyst storage tank and an alkali liquor storage tank, the outlet of the pregnant solution tank is connected with the desulfurization liquid regeneration inlet of the regeneration unit, the sulfur foam outlet of the regeneration unit is connected with the sulfur foam tank, and the desulfurization liquid regeneration outlet of the regeneration unit is connected with the desulfurization liquid inlet of the desulfurization unit. The content of hydrogen sulfide in the purified coke oven gas is 20mg/Nm3The followingAnd can control the growth of rich salt in the desulfurization process.
Description
Technical Field
The invention relates to the technical field of fuel gas purification, in particular to a coke oven gas desulfurization purification process and a coke oven gas desulfurization purification device based on a complex iron catalyst.
Background
The coke oven gas is a high-calorific-value gas, can be used as a fuel, and can also be used as an important raw material of chemical products, such as synthetic ammonia, methanol and the like. The coke oven gas, whether used as fuel or as raw material for production, needs to be purified before use to remove H in the gas2S, HCN and the like, and meets the requirements of environmental protection and production.
The existing coke oven gas desulfurization is Na2CO3Or ammonia is used as alkali source, the desulfurization catalyst is a compound of PDS, ADA or PDS, a high tower regeneration process, a jet regeneration process and an integrated process are adopted, the catalyst is mainly a compound catalyst taking PDS as a core, and in order to purify hydrogen sulfide to 20mg/Nm3Hereinafter, the number of desulfurization stages generally requires 2 to 3 stages of absorption. The sulfur content of raw material coal used in the domestic coking industry is higher and higher, which leads to the higher and higher sulfur content of coking by-product coke oven gas, and when the content of hydrogen sulfide of coke oven gas imported from a desulfurizing device is 8-12g/Nm3When the content is more than the above, three towers are adopted for series operation, and the content of the hydrogen sulfide in the purified coke oven gas is 100-200 mg/Nm-3(ii) a When the content of hydrogen sulfide of coke oven gas at the inlet of the desulfurizing device is 5-7g/Nm3When the content is more than the above, two towers are adopted for series operation, and the content of the hydrogen sulfide in the purified coke oven gas is 100-300 mg/Nm-3(ii) a When the content of hydrogen sulfide of coke oven gas at the inlet of the desulfurizing device is 3g/m3The two towers are connected in series, and the content of hydrogen sulfide in the purified coke oven gas is 50-100mg/Nm3All of them can not meet the requirements of city gas (the gas contains hydrogen sulfide and is less than 20 mg/m)3). In addition, the current desulfurization process using PDS as a core catalyst has the disadvantages of large circulating liquid amount and high power consumptionAnd the defects that rich salt is generated in the desulfurization process and the desulfurization solution needs to be discharged out regularly and vigorously are overcome, salt extraction treatment or other treatment is carried out on the discharged desulfurization solution, and the cost of additional environment-friendly treatment is increased.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a coke oven gas desulfurization and purification process and a coke oven gas desulfurization and purification device based on a complex iron catalyst, which have the characteristic of high desulfurization efficiency, and the content of hydrogen sulfide in the coke oven gas is 20mg/Nm after the coke oven gas is subjected to the desulfurization and purification process3In addition, the complex iron catalyst is adopted to replace the existing PDS-based desulfurization catalyst, so that the growth of rich salt in the desulfurization process can be controlled, and the discharge of waste liquid in the desulfurization and purification process of coke oven gas is eliminated.
In order to achieve the aim, the coke oven gas desulfurization and purification device comprises a desulfurization unit and a regeneration unit, and is characterized by also comprising a liquid seal tank, a liquid enrichment tank, a complex iron catalyst storage tank, an alkali liquor storage tank and a sulfur foam tank; the device comprises a desulfurization unit, a gas inlet of the desulfurization unit, a gas outlet of the desulfurization unit, a gas collecting device, a desulfurization liquid outlet of the desulfurization unit, a liquid seal tank, a liquid-rich tank, a complex iron catalyst storage tank and an alkali liquor storage tank, wherein the gas inlet of the desulfurization unit is connected with sulfur-containing coke oven gas, the gas outlet of the desulfurization unit is connected with the gas collecting device, the desulfurization liquid outlet of the desulfurization unit is connected with the liquid seal tank, the liquid seal tank is connected with the inlet of the liquid-rich tank, the inlet of the liquid-rich tank is also connected with the complex iron catalyst storage tank and the alkali liquor storage tank, the outlet of the liquid-rich tank is connected with the desulfurization liquid regeneration.
Preferably, the desulfurization unit is formed by connecting a first desulfurization tower and a second desulfurization tower in series, the regeneration unit is formed by connecting a first regeneration tower and a second regeneration tower in parallel, and desulfurization solution regeneration inlets of the first regeneration tower and the second regeneration tower are respectively connected with an outlet of the pregnant solution tank through pipelines.
As a preferred scheme, the first desulfurization tower is a spray tower, the second desulfurization tower is a packed tower, the first desulfurization tower comprises a tower body, a desulfurization liquid inlet spraying distributor and a filler, the coal gas outlet is arranged at the top of the tower body, the desulfurization liquid inlet is arranged at the upper part of the tower body 11a, the desulfurization liquid inlet spraying distributor is arranged at the upper part in the tower body and is connected with the desulfurization liquid inlet, the filler is arranged between the coal gas outlet and the desulfurization liquid inlet spraying distributor, the coal gas inlet is arranged at the lower part of the tower body, and the desulfurization liquid outlet is arranged at the bottom of the tower body.
Preferably, the first desulfurization tower further comprises a plurality of liquid distributors, and the plurality of liquid distributors are arranged between the gas inlet and the desulfurization liquid inlet spraying distributor at equal intervals.
A coke oven gas desulfurization purification process based on a complex iron catalyst comprises the following steps:
(1) and (3) desulfurization: introducing sulfur-containing coke oven gas from the lower part of the first desulfurization tower, introducing desulfurization liquid into the upper part of the first desulfurization tower, carrying out countercurrent contact desulfurization on the coke oven gas and the desulfurization liquid, and carrying out repeated redistribution on the desulfurization liquid by using a liquid distributor in the gas-liquid contact process in the tower; introducing the coke oven gas purified by the desulfurization solution of the first desulfurization tower into a second desulfurization tower to be subjected to countercurrent contact desulfurization treatment with the desulfurization solution again, and conveying the coke oven gas treated by the second desulfurization tower to a subsequent working section;
(2) regeneration of the desulfurization solution: collecting the desulfurization solution flowing out of the first desulfurization tower and the desulfurization solution flowing out of the second desulfurization tower, supplementing alkali liquor and complex iron catalyst solution into the desulfurization solution to obtain desulfurization mixed solution, introducing the desulfurization mixed solution into the first regeneration tower and the second regeneration tower respectively, enabling the desulfurization mixed solution to be in parallel flow contact with compressed air in the first regeneration tower and the second regeneration tower, oxidizing and regenerating the desulfurization mixed solution to obtain regenerated desulfurization solution and sulfur foam, returning the regenerated desulfurization solution into the first desulfurization tower and the second desulfurization tower respectively for circulating desulfurization treatment, and enabling the sulfur foam to flow into a sulfur foam tank from the top of the tower for sulfur recovery treatment.
Preferably, the complex iron catalyst solution is obtained by dissolving a complex iron catalyst in deionized water, and the total iron concentration in the desulfurization mixed solution is controlled to be 300-3000 mg/L.
Preferably, the alkali liquor is ammonia water or sodium carbonate solution.
Preferably, the flow velocity of the coke oven gas in the first desulfurizing tower is 0.3-3 m/s, and the spraying density of the desulfurizing solution in the first desulfurizing tower is 20-60 m3/m2H, the pressure of the coke oven gas passing through the first desulfurizing tower is reduced to 200-1200 Pa, and the spraying density of a desulfurizing solution in the second desulfurizing tower is 25-80 m3/m2·h。
Preferably, the first desulfurization tower is a spray tower, and the second desulfurization tower is a packed tower.
As a preferred scheme, the coke oven gas desulfurization purification process based on the complex iron catalyst is realized by a coke oven gas desulfurization purification device, and the coke oven gas desulfurization purification device comprises a desulfurization unit, a regeneration unit, a liquid seal tank, a liquid enrichment tank, a complex iron catalyst storage tank, an alkali liquor storage tank and a sulfur foam tank; the device comprises a desulfurization unit, a liquid seal tank, a rich liquid tank, a complex iron catalyst storage tank and an alkali liquor storage tank, wherein a gas inlet of the desulfurization unit is connected with sulfur-containing coke oven gas, a gas outlet of the desulfurization unit is connected with a gas collecting device, a desulfurization liquid outlet of the desulfurization unit is connected with the liquid seal tank, the liquid seal tank is connected with an inlet of the rich liquid tank, an inlet of the rich liquid tank is also connected with the complex iron catalyst storage tank and the alkali liquor storage tank, an outlet of the rich liquid tank is connected with a desulfurization liquid regeneration inlet of a regeneration unit, a sulfur foam outlet of the regeneration unit is connected with a sulfur foam tank, and a desulfurization liquid regeneration outlet of the regeneration unit is connected;
the desulfurization unit is formed by connecting a first desulfurization tower and a second desulfurization tower in series, the regeneration unit is formed by connecting a first regeneration tower and a second regeneration tower in parallel, and desulfurization solution regeneration inlets of the first regeneration tower and the second regeneration tower are respectively connected with an outlet of the pregnant solution tank through pipelines; the first desulfurization tower is a spray tower, the second desulfurization tower is a packed tower and comprises a tower body, a desulfurization liquid inlet spraying distributor, a filler and a plurality of liquid distributors, the coal gas outlet is formed in the top of the tower body, the desulfurization liquid inlet is formed in the upper portion of the tower body, the desulfurization liquid inlet spraying distributor is formed in the upper portion of the tower body and connected with the desulfurization liquid inlet, the filler is arranged between the coal gas outlet and the desulfurization liquid inlet spraying distributor, the coal gas inlet is formed in the lower portion of the tower body, and the desulfurization liquid outlet is formed in the bottom of the tower body; the plurality of liquid distributors are arranged between the coal gas inlet and the desulfurization liquid inlet spraying distributor at equal intervals.
Compared with the existing coke oven gas desulfurization process of the compound catalyst taking PDS as the core, the invention has the following advantages:
(1) the complex iron catalyst has high selectivity, can control the growth of the desulfurization rich salt and eliminate the discharge of waste liquid.
(2) The two-stage desulfurization process adopting the empty tower spraying and series-connection packed tower has the advantages of high desulfurization efficiency, short process flow, less investment and low cost.
(3) The desulfurization solution of the invention has small circulation amount and low operation cost.
(4) The process can ensure that the content of hydrogen sulfide in the high-sulfur coke oven gas is 20mg/Nm3The method can meet the use standard of urban gas and can meet the requirement of preparing methanol from coke oven gas.
Drawings
FIG. 1 is a schematic structural diagram of a coke oven gas desulfurization and purification device of the present invention;
FIG. 2 is a schematic structural diagram of a first desulfurization tower (spray tower) in FIG. 1;
the components in the figures are numbered as follows: the desulfurization unit 10, the first desulfurization tower 11, the second desulfurization tower 12, the tower body 11a, a desulfurization liquid feed spraying distributor 11b, a liquid distributor 11c, a coal gas inlet 11d, a coal gas outlet 11e, a desulfurization liquid outlet 11f, a desulfurization liquid inlet 11g, a manhole 11h, a filler 11i, a seal head 11j, a liquid seal tank 20, a rich liquid tank 30, a complex iron catalyst storage tank 40, an alkali liquid storage tank 50, a regeneration unit 60, a first regeneration tower 61, a second regeneration tower 62, a desulfurization liquid regeneration inlet 63, a desulfurization liquid regeneration outlet 64, a sulfur foam outlet 65, an air inlet 66, a first lift pump 70, a second lift pump 80 and a sulfur foam tank 90.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, which is illustrated in the accompanying drawings.
Example 1
Referring to fig. 1, the coke oven gas desulfurization purification apparatus of the present embodiment includes a desulfurization unit 10, a liquid seal tank 20, a rich solution tank 30, a complex iron catalyst storage tank 40, an alkali solution storage tank 50, a regeneration unit 60, a first lift pump 70, a second lift pump 80, and a sulfur foam tank 90;
referring to fig. 1 and 2, a desulfurization unit 10 is formed by connecting a first desulfurization tower 11 and a second desulfurization tower 12 in series, wherein the first desulfurization tower 11 is a spray tower, and the second desulfurization tower 12 is a packed tower; the first desulfurizing tower 11 comprises a tower body 11a, a desulfurizing liquid inlet spraying distributor 11b, four liquid distributors 11c, a coal gas inlet 11d, a coal gas outlet 11e, a desulfurizing liquid outlet 11f, a desulfurizing liquid inlet 11g, a manhole 11h, a filler 11i and a sealing head 11 j; the coal gas outlet 11e is arranged at the top of the tower body 11a, the desulfurization liquid inlet 11g is arranged at the upper part of the tower body 11a, the desulfurization liquid inlet spraying distributor 11b is arranged at the upper part in the tower body 11a and is connected with the desulfurization liquid inlet 11g, the coal gas inlet 11d is arranged at the lower part of the tower body 11a, the desulfurization liquid outlet 11f is arranged at the bottom of the tower body 11a, and the four liquid distributors 11c are equidistantly arranged between the coal gas inlet 11d and the desulfurization liquid inlet spraying distributor 11 b; the filler 11i is arranged in the tower body 11a and positioned between the coal gas outlet 11e and the desulfurizing liquid inlet spraying distributor 11 b; the head 11j is arranged at the bottom of the tower body 11a, and four manholes 11h are arranged and are respectively positioned above the liquid distributor 11 c.
The regeneration unit 60 is formed by connecting a first regeneration tower 61 and a second regeneration tower 62 in parallel, wherein desulfurization solution regeneration inlets 63 of the first regeneration tower 61 and the second regeneration tower 62 are respectively arranged at the bottom of the first regeneration tower 61 and the second regeneration tower 62, air inlets 66 of the first regeneration tower 61 and the second regeneration tower 62 are respectively arranged at the lower part of the first regeneration tower 61 and the second regeneration tower 62, desulfurization solution regeneration outlets 64 of the first regeneration tower 61 and the second regeneration tower 62 are respectively arranged at the upper part of the first regeneration tower 61 and the second regeneration tower 62, and sulfur foam outlets 65 of the first regeneration tower 61 and the second regeneration tower 62 are respectively arranged at the top of the first regeneration tower 61 and the second regeneration tower 62.
A gas inlet 11d of the first desulfurizing tower 11 is connected with sulfur-containing coke oven gas, a gas outlet 11e of the first desulfurizing tower 11 is connected with a gas inlet of the second desulfurizing tower 12, and a gas outlet of the second desulfurizing tower 12 is connected with a gas collecting device;
the desulfurization solution outlet 11f of the first desulfurization tower 11 and the desulfurization solution outlet of the second desulfurization tower 12 are respectively connected with a liquid seal tank 20, the liquid seal tank 20 is connected with a rich solution tank 30, the inlet of the rich solution tank 30 is also connected with a complex iron catalyst storage tank 40 and an alkali liquor storage tank 50, the outlet of the rich solution tank 30 is connected with a first regeneration tower 61 through a first lift pump 70, the outlet of the rich solution tank 30 is connected with a second regeneration tower 62 through a second lift pump 80, the desulfurization solution regeneration outlets 64 of the first regeneration tower 61 and the second regeneration tower 62 are respectively connected with the first desulfurization tower 11 and the second desulfurization tower 12 through pipelines to realize the recycling of the desulfurization solution, and the sulfur foam outlets 65 of the first regeneration tower 61 and the second regeneration tower 62 are connected with a sulfur foam tank 90.
The coke oven gas desulfurization purification process based on the complex iron catalyst is realized by the coke oven gas desulfurization purification device, and specifically comprises the following steps:
(1) and (3) desulfurization: introducing sulfur-containing coke oven gas from the lower part of the first desulfurization tower, introducing desulfurization liquid into the upper part of the first desulfurization tower, carrying out countercurrent contact desulfurization on the coke oven gas and the desulfurization liquid, and carrying out repeated redistribution on the desulfurization liquid by using a liquid distributor in the gas-liquid contact process in the tower; introducing the coke oven gas purified by the desulfurization solution of the first desulfurization tower into a second desulfurization tower to be subjected to countercurrent contact desulfurization treatment with the desulfurization solution again, and conveying the coke oven gas treated by the second desulfurization tower to a subsequent working section;
(2) regeneration of the desulfurization solution: collecting the desulfurization solution flowing out of the first desulfurization tower and the desulfurization solution flowing out of the second desulfurization tower, supplementing alkali liquor and complex iron catalyst solution into the flowing desulfurization solution to obtain desulfurization mixed solution, introducing the desulfurization mixed solution into a regeneration tower, enabling the desulfurization mixed solution to be in parallel flow contact with compressed air in the regeneration tower, oxidizing and regenerating the desulfurization mixed solution to obtain regenerated desulfurization solution and sulfur foam, respectively returning the regenerated desulfurization solution to the first desulfurization tower and the second desulfurization tower for circulating desulfurization treatment, and enabling the sulfur foam to flow into a sulfur foam tank from the tower top for sulfur recovery treatment;
wherein the complex iron catalyst solution is obtained by dissolving a complex iron catalyst (GLT-01A/B complex iron catalyst, from energy environmental protection GmbH of force of Wuhan, China) in deionized water, and controlling the total iron concentration in the desulfurization mixed solution to be 300 mg/L;
the alkali solution is ammonia water or sodium carbonate solution;
the flow velocity of the coke oven gas in the spray tower is 0.3m/s, and the spray density of the desulfurization solution is 20m3/m2H, the pressure of the coke oven gas passing through the spray tower is reduced to 200Pa, and the spray density of the packed desulfurization tower is 25m3/m2·h。
Examples 2 to 4
The steps of examples 2, 3 and 4 are the same as example 1, only the adjustment of the process parameters is performed, and the details are not repeated here, and the process parameters of examples 1 to 4 are shown in table 1.
TABLE 1
As can be seen from Table 1, when the hydrogen sulfide content of the coke oven gas at the inlet of the first desulfurization tower is 2 to 10g/Nm3When in use, the complex iron catalyst is used as a desulfurization catalyst, and the hydrogen sulfide content in the coke oven gas is less than 20mg/Nm after the two-stage desulfurization process of the empty tower spraying series packed tower is adopted3The complex iron catalyst is used to replace available PDS catalyst, and this can control the growth of rich salt in desulfurizing process and eliminate waste liquid exhaust in the desulfurizing and purifying process of coke oven gas.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A coke oven gas desulfurization purification device comprises a desulfurization unit (10) and a regeneration unit (60), and is characterized by also comprising a liquid seal tank (20), a rich solution tank (30), a complex iron catalyst storage tank (40), an alkali liquor storage tank (50) and a sulfur foam tank (90); the desulfurization device comprises a desulfurization unit (10), a gas inlet (11d) of the desulfurization unit (10) and a gas outlet (11e) of the desulfurization unit (10), wherein the gas outlet (11e) of the desulfurization unit (10) is connected with a gas collecting device, a desulfurization solution outlet (11f) of the desulfurization unit (10) is connected with a liquid seal tank (20), the liquid seal tank (20) is connected with an inlet of a liquid enrichment tank (30), an inlet of the liquid enrichment tank (30) is also connected with a complex iron catalyst storage tank (40) and an alkali liquor storage tank (50), an outlet of the liquid enrichment tank (30) is connected with a desulfurization solution regeneration inlet (63) of a regeneration unit (60), a sulfur foam outlet (65) of the regeneration unit (60) is connected with a sulfur foam tank (90), and a desulfurization solution regeneration outlet (64) of the regeneration unit (60) is connected with a desulfurization solution inlet (11g) of the desulfurization unit (10).
2. The coke oven gas desulfurization purification apparatus according to claim 1, wherein the desulfurization unit (10) is composed of a first desulfurization tower (11) and a second desulfurization tower (12) connected in series, the regeneration unit (60) is composed of a first regeneration tower (61) and a second regeneration tower (62) connected in parallel, and desulfurization solution regeneration inlets (63) of the first regeneration tower (61) and the second regeneration tower (62) are respectively connected with an outlet of the rich liquor tank (30) through pipes.
3. The coke oven gas desulfurization purification apparatus according to claim 2, wherein the first desulfurization tower (11) is a spray tower, the second desulfurization tower (12) is a packed tower, the first desulfurization tower (11) comprises a tower body (11a), a desulfurization liquid inlet spray distributor (11b) and packing (11i), the gas outlet (11e) is disposed at the top of the tower body (11a), the desulfurization liquid inlet (11g) is disposed at the upper portion of the tower body (11a), the desulfurization liquid inlet spray distributor (11b) is disposed at the upper portion of the tower body (11a) and connected to the desulfurization liquid inlet (11g), the packing (11i) is disposed between the gas outlet (11e) and the desulfurization liquid inlet spray distributor (11b), the gas inlet (11d) is disposed at the lower portion of the tower body (11a), the desulfurization liquid outlet (11f) is arranged at the bottom of the tower body (11 a).
4. The coke oven gas desulfurization purification apparatus according to claim 3, wherein the first desulfurization tower (11) further comprises a plurality of liquid distributors (11c), the plurality of liquid distributors (11c) being arranged at equal intervals between the gas inlet (11d) and the desulfurization liquid inlet spray distributor (11 b).
5. A coke oven gas desulfurization purification process based on a complex iron catalyst comprises the following steps:
(1) and (3) desulfurization: introducing sulfur-containing coke oven gas from the lower part of a first desulfurizing tower (11), introducing desulfurizing liquid into the upper part of the first desulfurizing tower (11), carrying out countercurrent contact desulfurization on the coke oven gas and the desulfurizing liquid, and redistributing the desulfurizing liquid for multiple times by using a liquid distributor (11c) in the gas-liquid contact process in the tower; introducing the coke oven gas purified by the desulfurization solution of the first desulfurization tower (11) into a second desulfurization tower (12) to be in countercurrent contact with the desulfurization solution again for desulfurization treatment, and conveying the coke oven gas treated by the second desulfurization tower (12) to a subsequent working section;
(2) regeneration of the desulfurization solution: collecting the desulfurization solution flowing out of a first desulfurization tower (11) and the desulfurization solution flowing out of a second desulfurization tower (12), supplementing alkali liquor and complex iron catalyst solution into the desulfurization solution to obtain desulfurization mixed solution, introducing the desulfurization mixed solution into a first regeneration tower (61) and a second regeneration tower (62) respectively, enabling the desulfurization mixed solution to be in parallel flow contact with compressed air in the first regeneration tower (61) and the second regeneration tower (62), oxidizing and regenerating the desulfurization mixed solution to obtain regenerated desulfurization solution and sulfur foam, returning the regenerated desulfurization solution into the first desulfurization tower (11) and the second desulfurization tower (12) respectively for circulating desulfurization treatment, and enabling the sulfur foam to flow into a sulfur foam tank (90) from the top of the tower for sulfur recovery treatment.
6. The coke oven gas desulfurization purification process based on the complex iron catalyst of claim 5, wherein the complex iron catalyst solution is obtained by dissolving a complex iron catalyst in deionized water, and the total iron concentration in the desulfurization mixed solution is controlled to be 300-3000 mg/L.
7. The coke oven gas desulfurization purification process based on the complex iron catalyst of claim 5, wherein the alkali solution is ammonia water or sodium carbonate solution.
8. The complex iron catalyst-based coke oven gas desulfurization and purification process as claimed in claim 5, wherein the flow velocity of the coke oven gas in the first desulfurization tower (11) is 0.3-3 m/s, and the spraying density of the desulfurization solution in the first desulfurization tower (11) is 20-60 m3/m2H, the pressure of the coke oven gas passing through the first desulfurizing tower (11) is reduced to 200-1200 Pa, and the spraying density of the desulfurizing solution in the second desulfurizing tower (12) is 25-80 m3/m2·h。
9. The complex iron catalyst-based coke oven gas desulfurization purification process according to claim 5, wherein the first desulfurization tower (11) is a spray tower and the second desulfurization tower (12) is a packed tower.
10. The coke oven gas desulfurization purification process based on the complex iron catalyst according to any one of claims 5 to 9, which is realized by a coke oven gas desulfurization purification device, wherein the coke oven gas desulfurization purification device comprises a desulfurization unit (10), a regeneration unit (60), a liquid seal tank (20), a liquid-rich tank (30), a complex iron catalyst storage tank (40), an alkali liquor storage tank (50) and a sulfur foam tank (90); the coal gas inlet (11d) of the desulfurization unit (10) is connected with sulfur-containing coke oven gas, the coal gas outlet (11e) of the desulfurization unit (10) is connected with a coal gas collecting device, the desulfurization solution outlet (11f) of the desulfurization unit (10) is connected with a liquid seal tank (20), the liquid seal tank (20) is connected with the inlet of a liquid enrichment tank (30), the inlet of the liquid enrichment tank (30) is also connected with a complex iron catalyst storage tank (40) and an alkali liquor storage tank (50), the outlet of the liquid enrichment tank (30) is connected with the desulfurization solution regeneration inlet (63) of the regeneration unit (60), the sulfur foam outlet (65) of the regeneration unit (60) is connected with a sulfur foam tank (90), and the desulfurization solution regeneration outlet (64) of the regeneration unit (60) is connected with the desulfurization solution inlet (11g) of the desulfurization unit (10);
the desulfurization unit (10) is formed by connecting a first desulfurization tower (11) and a second desulfurization tower (12) in series, the regeneration unit (60) is formed by connecting a first regeneration tower (61) and a second regeneration tower (62) in parallel, and desulfurization solution regeneration inlets (63) of the first regeneration tower (61) and the second regeneration tower (62) are respectively connected with an outlet of the rich liquor tank (30) through pipelines; the first desulfurizing tower (11) is a spray tower, the second desulfurizing tower (12) is a packed tower, the first desulfurizing tower (11) comprises a tower body (11a), a desulfurizing liquid inlet liquid spraying distributor (11b), a filler (11i) and a plurality of liquid distributors (11c), the coal gas outlet (11e) is arranged at the top of the tower body (11a), the desulfurizing liquid inlet (11g) is arranged at the upper part of the tower body (11a), the desulfurizing liquid inlet spraying distributor (11b) is arranged at the upper part in the tower body (11a) and is connected with the desulfurizing liquid inlet (11g), the filler (11i) is arranged between the coal gas outlet (11e) and the desulfurizing liquid inlet liquid spraying distributor (11b), the coal gas inlet (11d) is arranged at the lower part of the tower body (11a), and the desulfurization liquid outlet (11f) is arranged at the bottom of the tower body (11 a); the plurality of liquid distributors (11c) are arranged between the gas inlet (11d) and the desulfurization liquid inlet spraying distributor (11b) at equal intervals.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114250087A (en) * | 2021-12-29 | 2022-03-29 | 临涣焦化股份有限公司 | Coke oven gas complex iron pre-cooling pretreatment system and method before desulfurization |
| CN114806649A (en) * | 2022-04-19 | 2022-07-29 | 武汉国力通能源环保股份有限公司 | Coke oven gas complex iron desulfurization recycling process method and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250087A (en) * | 2021-12-29 | 2022-03-29 | 临涣焦化股份有限公司 | Coke oven gas complex iron pre-cooling pretreatment system and method before desulfurization |
| CN114250087B (en) * | 2021-12-29 | 2023-10-03 | 临涣焦化股份有限公司 | Coke oven gas complex iron pre-desulfurization cooling pretreatment system and method |
| CN114806649A (en) * | 2022-04-19 | 2022-07-29 | 武汉国力通能源环保股份有限公司 | Coke oven gas complex iron desulfurization recycling process method and device |
| CN114806649B (en) * | 2022-04-19 | 2023-11-24 | 武汉国力通能源环保股份有限公司 | Coke oven gas complex iron desulfurization resource processing method and device |
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