CN204933231U - Flue gas sodium method desulfurization unit in sulfur recovery unit - Google Patents
Flue gas sodium method desulfurization unit in sulfur recovery unit Download PDFInfo
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- CN204933231U CN204933231U CN201520651492.0U CN201520651492U CN204933231U CN 204933231 U CN204933231 U CN 204933231U CN 201520651492 U CN201520651492 U CN 201520651492U CN 204933231 U CN204933231 U CN 204933231U
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Abstract
The utility model relates to flue gas sodium method desulfurization unit in a kind of sulfur recovery unit, comprises flue, and it is characterized in that the outlet of flue connects the tower top entrance of quenching column, quenching column internal upper part is provided with the first spray equipment; The tower bottom outlet of quenching column connects the injection point of comprehensive tower; Comprehensive tower is divided into three sections, is respectively slurries district, packing area and foam removal district from bottom to top; The second spray equipment to the filler spray in packing area is provided with between packing area and foam removal district; Injection point is between packing area and slurries district; The bottom in slurries district is provided with air-blowing device; The outlet at bottom of comprehensive tower connects acid line, and acid line is divided into three tunnels, and wherein the first via connects the first spray equipment, and the second tunnel connects the second spray equipment, and the 3rd tunnel connects sewage-treatment plant; The top exit of comprehensive tower connects chimney; The bottom of comprehensive tower is also connected with the alkali lye pipeline be connected with slurries district.This desulfurization unit can to make in emission sulfur content lower than 50mg/m
3, to meet new environmental requirement.
Description
Technical field
The utility model relates to chemical plant installations, specifically refers to flue gas sodium method desulfurization unit in a kind of sulfur recovery unit.
Background technology
Current sulfur recovery facility technology path is the burning of Crouse's sulphur, vent gas treatment and flue gas, and this process route sulfur recovery rate can reach more than 99.95%, and sulfur dioxide in flue gas concentration of emission is usually at 300 ~ 800mg/nm
3.
Along with environmental requirement is more and more harsher, domestic new environmental protection standard requires that sulfur recovery facility discharge sulfur dioxide in flue gas concentration of emission is less than 100mg/nm
3, traditional technology path cannot meet this harsh environmental requirement, must adopt new technology, makes device Recovered sulphur as much as possible, guarantees that discharge sulfur dioxide in flue gas concentration meets environmental requirement simultaneously.
Summary of the invention
Technical problem to be solved in the utility model provides one that discharge sulfureous in flue gas content can be made to control be less than 50mg/m for the present situation of prior art
3flue gas sodium method desulfurization unit in following sulfur recovery unit, to meet new environmental requirement, protection of the environment.
The utility model solves the problems of the technologies described above adopted technical scheme: flue gas sodium method desulfurization unit in this sulfur recovery unit, comprise the flue connecting and burn unit exhanst gas outlet in sulfur recovery facility, it is characterized in that the outlet of described flue connects the tower top entrance of quenching column, described quenching column internal upper part is provided with the first spray equipment;
The tower bottom outlet of described quenching column connects the injection point of comprehensive tower;
Described comprehensive tower is divided into three sections, is respectively slurries district, packing area and foam removal district from bottom to top; The second spray equipment to the filler spray in described packing area is provided with between described packing area and foam removal district; Described injection point is between described packing area and slurries district; The bottom in described slurries district is provided with air-blowing device; The outlet at bottom of described comprehensive tower connects acid line, and described acid line is divided into three tunnels, and wherein the first via connects described first spray equipment, and the second tunnel connects described second spray equipment, and the 3rd tunnel connects sewage-treatment plant; The top exit of described comprehensive tower connects chimney;
The bottom of described comprehensive tower is also connected with the alkali lye pipeline be connected with described slurries district.
Preferably, in order to ensure desulfurized effect, described flue can connect the heat medium passage of First Heat Exchanger, the refrigerant passage of described First Heat Exchanger connects the heat medium passage of the second heat exchanger, the refrigerant passage entrance of described second heat exchanger connects air blast, and the refrigerant passage outlet of described second heat exchanger connects described chimney.This structure can be lowered the temperature before entering quenching column to flue gas, to ensure the desulfurized effect of quenching column; Air simultaneously after heating enters chimney and can heat tail gas to be discharged, forms colourless gas.
Foam removal plot structure in above-mentioned each scheme can have multiple, such as can select conventional demister, preferably, multiple foam removal packing section and multiple 3rd spray equipment can be interval with in described foam removal district, each described 3rd spray equipment each foam removal packing section of subtend respectively, and each described 3rd spray equipment connects external source.Adopt the foam removal better effects if of filler, and entrained solid granule in flue gas can be retained, and by spray, drip washing goes out the material retained in filler can make foam removal filler regenerate.
Consider unusual service condition, on described flue, also can be connected with two bypass conduits, described two bypass conduits is provided with control valve, and described two bypass conduits connects described chimney.Flue gas after burning directly can be imported chimney from two bypass conduits during unusual service condition.
In order to using water wisely, described external source can be from the fresh water of sulphur unit and purifying waste water from acidic water stripping device.
Compared with prior art, flue gas sodium method desulfurization unit provided by the utility model absorbs with NaOH after first tail gas medium sulphide content being burned into sulfur dioxide again, and sulfur dioxide is strong acid, and therefore removal efficiency is high; And can effectively remove COS, CS in tail gas
2and RSH, in emission, sulfur content is lower than 50mg/m
3, far below new environmental requirement; And equipment investment is low, occupation of land space is little, and resistance drop is little, and energy conservation and consumption reduction effects is remarkable.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
As shown in Figure 1, in this sulfur recovery unit, flue gas sodium method desulfurization unit comprises:
Flue 1, connects the exhanst gas outlet burning unit in sulfur recovery facility, for the tail gas containing sulfur dioxide after burning is delivered to quenching column 2.The present embodiment is also connected with two bypass conduits 11 on flue 1, and two bypass conduits 11 is provided with control valve 12, and two bypass conduits 11 connects chimney 6.
First Heat Exchanger 71 and the second heat exchanger 72, flue 1 connects the tower top entrance of quenching column 2 by the heat medium passage of First Heat Exchanger 71, two ports of the refrigerant passage of First Heat Exchanger 71 connect two ports of the heat medium passage of the second heat exchanger 72 respectively, the refrigerant passage entrance of the second heat exchanger connects air blast 9, and the refrigerant passage outlet of described second heat exchanger connects chimney 6.
Namely surrounding air enters the second heat exchanger and cools heating agent in the second heat exchanger, refrigerant as First Heat Exchanger cools the flue gas in the second heat exchanger, cooled flue gas enters in quenching column 2, entered the tail gas of heating exhaust in chimney 6 by the air after heating, after tail gas is heated, become colourless gas emptying.
Quenching column 2 is venturi scrubber, and quenching column internal upper part is provided with the first spray equipment 21; First spray equipment can select as required of the prior art any one; The tower bottom outlet of quenching column connects the injection point 31 of comprehensive tower 3.
Comprehensive tower 3, is divided into three sections, is respectively slurries district 32, packing area 33 and foam removal district 34 from bottom to top.
The bottom in slurries district is provided with air-blowing device 35, and air-blowing device 35 connects the non-purifying wind pipe road 4 of sulphur unit, also can connect outside air; Injection point 31 is between described packing area 33 and slurries district 32.Air-blowing device 35 can select as required of the prior art any one, the present embodiment adopt gas distributor.The bottom of comprehensive tower is also connected with the alkali lye pipeline 8 from sulfur recovery facility be connected with slurries district 32.The ducted alkali lye of alkali lye is sodium hydroxide solution.
Be filled with filler in packing area 33, filler is conventional fillers; The second spray equipment 331 is provided with between packing area 33 and foam removal district 34.
Be interval with multiple foam removal packing section 341 and multiple 3rd spray equipment 342 in foam removal district 34, the present embodiment is two-stage foam removal, and pressure drop is low, and demist is effective.The quantity of foam removal packing section can be arranged as required; Each 3rd spray equipment 342 each foam removal packing section 341 of subtend respectively, each 3rd spray equipment 342 connects external source, and the external source in the present embodiment is from the fresh water of sulphur unit and purifying waste water from acidic water stripping device.
The outlet at bottom of comprehensive tower 3 connects acid line 36, acid line 36 is provided with circulating pump 37, and acid line is divided into three tunnels, and wherein the first via 361 connects the first spray equipment 21, second tunnel 362 connects the second spray equipment the 331, three tunnel 363 and connects sewage-treatment plant 5.The top exit of comprehensive tower connects chimney 6.
The operation principle of the flue gas sodium method desulfurization unit in this sulfur recovery unit is described below:
From the flue gas after the burning of sulfur recovery facility, after first entering First Heat Exchanger heat exchange cooling, enter quenching column from top, undertaken lowering the temperature by venturi grid together with the circulation fluid sprayed from quenching column top first spray equipment, desulfurization.The oxious components such as the sulfur dioxide in flue gas are recycled liquid and absorb, and flue-gas temperature are reduced further simultaneously, form slurries in quenching column bottom.
Sodium hydroxide solution from alkali lye pipeline injects bottom comprehensive tower, maintains the pH value of tower entoplasm liquid zone about 7.
Slurries and flue gas enter comprehensive tower bottom quenching column, complete gas-liquid two-phase be separated in the slurries district of comprehensive tower.The air reaction of slurries in slurries district and non-purification wind, by Na
2sO
3be oxidized to Na
2sO
4, extracted out by circulating pump, be divided into three tunnels.Wherein the first via enters quenching column via the first spray equipment and recycles; Second tunnel enters comprehensive tower via the second spray equipment and recycles; 3rd tunnel is sent to sewage-treatment plant and carries out reprocessing.
The isolated gas phase in slurries district enters packing area, contacts with the circulation fluid from the second spray equipment is reverse in packing area, continues desulfurization.Flue gas after desulfurization enters foam removal district, and the droplet that removing is carried and foam are discharged from the tower top of comprehensive tower, enter chimney.Entered chimney by the hot-air after secondary heater heats simultaneously, by tail gas heating to be discharged, form colourless gas from chimney emptying.
After tested, in the tail gas of discharge, sulfur content is less than 50mg/m
3.
3rd spray equipment can periodic duty, the foam retained and granule is leached out, to ensure the foam removal function in foam removal district in foam removal filler.
Claims (4)
1. flue gas sodium method desulfurization unit in sulfur recovery unit, comprise the flue (1) connecting and burn unit exhanst gas outlet in sulfur recovery facility, it is characterized in that the outlet of described flue (1) connects the tower top entrance of quenching column (2), described quenching column internal upper part is provided with the first spray equipment (21);
The tower bottom outlet of described quenching column connects the injection point (31) of comprehensive tower (3);
Described comprehensive tower (3) is divided into three sections, is respectively slurries district (32), packing area (33) and foam removal district (34) from bottom to top; The second spray equipment (331) to the filler spray in described packing area is provided with between described packing area (33) and foam removal district (34); Described injection point (31) is positioned between described packing area (33) and slurries district (32); The bottom in described slurries district is provided with air-blowing device (35); The outlet at bottom of described comprehensive tower 3 connects acid line (36), described acid line (36) is divided into three tunnels, wherein the first via (361) connects described first spray equipment (21), second tunnel (362) connects described second spray equipment (331), and the 3rd tunnel (363) connects sewage-treatment plant (5); The top exit of described comprehensive tower connects chimney (6);
The bottom of described comprehensive tower is also connected with the alkali lye pipeline (8) be connected with described slurries district (32).
2. the flue gas sodium method desulfurization unit in sulfur recovery unit according to claim 1, it is characterized in that described flue (1) connects the heat medium passage of First Heat Exchanger (71), the refrigerant passage of described First Heat Exchanger (71) connects the heat medium passage of the second heat exchanger (72), the refrigerant passage entrance of described second heat exchanger connects air blast (9), and the refrigerant passage outlet of described second heat exchanger connects described chimney (6).
3. the flue gas sodium method desulfurization unit in sulfur recovery unit according to claim 1 and 2, it is characterized in that in described foam removal district (34), being interval with multiple foam removal packing section (341) and multiple 3rd spray equipment (342), each described 3rd spray equipment (342) each foam removal packing section (341) of subtend respectively, and each described 3rd spray equipment (342) connects external source.
4. the flue gas sodium method desulfurization unit in sulfur recovery unit according to claim 3, it is characterized in that described flue (1) is also connected with two bypass conduits (11), described two bypass conduits (11) is provided with control valve (12), and described two bypass conduits (11) connects described chimney (6).
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|---|---|---|---|
| CN201520651492.0U CN204933231U (en) | 2015-08-26 | 2015-08-26 | Flue gas sodium method desulfurization unit in sulfur recovery unit |
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|---|---|---|---|
| CN201520651492.0U CN204933231U (en) | 2015-08-26 | 2015-08-26 | Flue gas sodium method desulfurization unit in sulfur recovery unit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345245A (en) * | 2016-10-21 | 2017-01-25 | 洛阳栾川钼业集团股份有限公司 | Structure improvement method of demister in WSA wet-process acid production |
| CN109999627A (en) * | 2018-01-05 | 2019-07-12 | 北京万信同和能源科技有限公司 | Wet plume abatement equipment and method for catalytic cracking wet desulphurization device |
| CN114177748A (en) * | 2020-09-14 | 2022-03-15 | 中国石油化工股份有限公司 | Reduce SO in sulphur flue gas2Discharged alkaline washing tower and process |
| CN115253995A (en) * | 2022-09-30 | 2022-11-01 | 江苏富淼科技股份有限公司 | Tower-type quaternary ammonium salt production device and quaternary ammonium salt production method |
-
2015
- 2015-08-26 CN CN201520651492.0U patent/CN204933231U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106345245A (en) * | 2016-10-21 | 2017-01-25 | 洛阳栾川钼业集团股份有限公司 | Structure improvement method of demister in WSA wet-process acid production |
| CN109999627A (en) * | 2018-01-05 | 2019-07-12 | 北京万信同和能源科技有限公司 | Wet plume abatement equipment and method for catalytic cracking wet desulphurization device |
| CN114177748A (en) * | 2020-09-14 | 2022-03-15 | 中国石油化工股份有限公司 | Reduce SO in sulphur flue gas2Discharged alkaline washing tower and process |
| CN115253995A (en) * | 2022-09-30 | 2022-11-01 | 江苏富淼科技股份有限公司 | Tower-type quaternary ammonium salt production device and quaternary ammonium salt production method |
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