CN203447956U - Low-temperature methanol desulfurizing tower and coke oven gas purifying device utilizing same - Google Patents
Low-temperature methanol desulfurizing tower and coke oven gas purifying device utilizing same Download PDFInfo
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- CN203447956U CN203447956U CN201320522134.0U CN201320522134U CN203447956U CN 203447956 U CN203447956 U CN 203447956U CN 201320522134 U CN201320522134 U CN 201320522134U CN 203447956 U CN203447956 U CN 203447956U
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Abstract
The utility model relates to a coke oven gas purifying technology, and in particular relates to a low-temperature methanol desulfurizing tower and a coke oven gas purifying device utilizing the low-temperature methanol desulfurizing tower. The technical problems of high cost, complex process and high dosage of a catalyst in a coke oven gas desulfurizing process in the prior art are solved. The low-temperature methanol desulfurizing tower comprises a vertically arranged tower body with a hollow inner part, wherein a gas outlet is formed on the top of the tower body, a bottom liquid outlet is formed on the bottom of the tower body; a first liquid collecting box and a second liquid collecting box are arranged in the tower body from top to bottom; the two liquid collecting boxes divide the inner part of the tower body into three cavities; a liquid inlet is formed close to the upper tower body side wall, of each cavity; a liquid outlet is formed close to the lower tower body side wall, of each of the upper cavity and the middle cavity; and a gas inlet is formed close to the bottom of the side wall of the lower cavity. Compared with a traditional coke over gas desulfurizing device, the coke oven gas purifying device has the characteristics of high processing capacity to sulfide, low cost, simple process, simplicity in operation, low running cost, and the like.
Description
Technical field
The utility model relates to coke oven gas purification technology, is specially a kind of low-temp methanol desulfurizing tower and adopts the coke oven gas purifying device of this desulfurizing tower.
Background technology
Coke-stove gas is the significant by-products obtaining in process of coking, quite ripe to the research of the constituent of coke-stove gas in recent years.Coke-stove gas belongs to the right gas of middle calorific value, wherein comprises huge value.
China is one of world steel big country, and coke output also position is at the forefront in the world, and is growing trend always.Coke output 2000 is 1.22 hundred million tons, within 2006, is 2.33 hundred million tons, within 2009, has risen to 3.53 hundred million tons.4.43 hundred million tons within 2012, have been risen to.When producing coke, can produce a large amount of coke-stove gas, if produce 430m according to producing 1 ton of coke
3coke-stove gas calculates, and within 2009, the annual coke-stove gas generating capacity of China can reach 1904.9 hundred million m
3, wherein the coke-stove gas of 70% left and right is personal for enterprise, commercialization and city dweller's gas, and remaining coke-stove gas directly burns and diffuses in atmosphere, has not only caused huge energy waste, and contaminated environment.According to expert, calculate, the coke-oven coal tolerance in atmosphere is diffused in the annual burning of China, is equivalent to country's " the more than 2 times of West-east Gas design year displacement.Therefore, the recycling of coke-stove gas is significant to realizing recycling with economic sustainable development of china natural resources.The purification of coke-stove gas has just become the most important thing.And key problem in coke oven gas purification is exactly desulfurization.
Be usually used at present Desulphurization Technology Coke Oven Gas and have dry method and the large class of wet desulphurization two.
Wet desulfurizing process mainly contains ADA method, HPF method, tannin extract method, DDS, PDF desulfurization etc., and ADA method sulfur removal technology be take sodium as alkali source, and quantity of alkali consumption is large, and waste liquid is difficult, must establish to carry salt device, invests larger.The H of coal gas after HPF method sulfur removal technology desulfurizing tower
2s content still can not reach town gas standard-required, need carry out afterbody desulfurization.Sulphur quality and productive rate are not high yet.And with respect to ADA method, investment is large, complex process, high to technological operation requirement, operation stability is relatively low.
Dry desulfurization is used for smart desulfurization, and inorganic sulfur and organic sulfur are had to higher degree of purification.Coal gas dry-method desulfurization mainly contains the desulfurizing agents such as iron oxide, active carbon, zinc oxide.Their common shortcomings are that desulphurization catalyst Sulfur capacity is little, and catalyst amount is large and will often change, and operation, operating cost are high.
Summary of the invention
Cost in current coke oven gas desulfurization process is high in order to solve for the utility model, complex process, technical problem that catalyst amount is large, a kind of low-temp methanol desulfurizing tower is provided and adopts the coke oven gas purifying device of this desulfurizing tower.
Low-temp methanol desulfurizing tower described in the utility model is to adopt following technical scheme to realize: a kind of low-temp methanol desulfurizing tower, comprise the tower body that the inside of vertically setting up is hollow, and the top of tower body is provided with gas vent, and tower body bottom is provided with bottom liquid outlet; Tower body inside is from top to bottom provided with the first catch box and the second catch box, and two catch boxs are from top to bottom divided into three cavitys by tower body inside; On the tower body sidewall of each cavity near its top, be equipped with liquid-inlet, upper cavity and middle cavity are provided with liquid outlet near the tower body sidewall of its underpart; Lower chamber sidewall is provided with gas feed near the position of bottom; The liquid outlet of upper cavity is connected by the first circulation line with the liquid-inlet of middle cavity; The liquid outlet of middle cavity is connected by the second circulation line with the liquid-inlet of lower chamber; Described catch box comprises a level board, and the middle part of level board has centre bore, and the border, edge of centre bore is provided with baffle plate straight up, and baffle plate top is provided with choked flow cap, between described choked flow cap and the upper end of baffle plate, has interval; The liquid outlet position of described upper cavity is lower than the upper end of the first catch box baffle plate; The liquid outlet position of described middle cavity is lower than the upper end of the second catch box baffle plate.
The utility model is when carrying out desulfuration operations, and methanol solution is entered by the liquid-inlet of upper cavity, and coke-stove gas is entered by the gas feed of tower body bottom.Coke-stove gas passes through three cavitys of tower from top to bottom successively, fully contacts and desulfurization with the methanol solution in three cavitys, and the coke-stove gas after desulfurization leaves from the gas vent of tower top.Methanol solution fully absorbs H
2after S, from bottom liquid outlet, discharge.Methyl alcohol is sprayed into by liquid-inlet, and catch box, for by coke-stove gas, stops that by choked flow cap methanol solution directly flows to the cavity of bottom simultaneously, and gas is by rising on the interval between choked flow cap and baffle plate.Liquid outlet is for methyl alcohol can only be flowed out from liquid outlet lower than the upper end of baffle plate.When whole device is used, technique is simple, easy to operate.Methyl alcohol cost is lower, recycles easy.
Further, on described first, second circulation line, be all serially connected with a desulfurizing tower heat exchanger.
For fully absorbing the H in coke-stove gas
2s is provided with heat exchanger on circulation line, after the methyl alcohol being flowed out can being lowered the temperature, inputs to next cavity by inside cavity again, and the methyl alcohol after cooling is easier to absorb the H in coke-stove gas
2s, has guaranteed desulfurization precision like this.
Coke oven gas purifying device described in the utility model is to adopt following technical scheme to realize: a kind of coke oven gas purifying device, comprises the oil removing connecting in turn, de-benzene, de-naphthalene device, the first compression set, the second compression set, heat exchanger, ammonia cooler and separator; Between described the first compression set and the second compression set, be connected with the first desulfurizing tower; Separator gas outlet is connected with the second desulfurizing tower; Described the first desulfurizing tower and the second desulfurizing tower all adopt low-temp methanol desulfurizing tower; Described the first desulfurizing tower is serially connected between the first compression set and the second compression set by gas feed and gas vent; A gas feed of heat exchanger is connected with the second compression set, and another gas feed of heat exchanger is connected with the gas vent of the second desulfurizing tower; The gas vent of separator is connected with the gas feed of the second desulfurizing tower.
Contain H
2s, COS, CS
2, mercaptan, thioether, thiophene etc. coke-stove gas, through oil removing, except naphthalene, except benzene device, remove impurity and enter the first desulfurizing tower after by the first compression set compression and carry out pre-desulfurization, in tower, by pressure 0.6～1.0MPa, the methyl alcohol of 0 ℃ of left and right of temperature absorbs most sulfide and CO
2by the second compression set, recompress 3.0～4.0MPa and enter heat exchanger, with after purified gas heat exchange, enter ammonia cooler, be cooled to-20 ℃, after separator separation, enter the second desulfurizing tower, the further desulfurization of-20 ℃ of left and right methanol solution counter current contacting with through precooling, removes remaining sulfide, CO
2, HCN, C
3and C
3above gaseous hydrocarbon etc., H after desulfurization
2s≤0.1ppm, CO
2≤ 20ppm, desulfurization after-purification gas is workshop section after heat exchanger heat exchange recovery cold is sent to.Described oil removing, de-benzene, de-naphthalene device, the first compression set, the second compression set, heat exchanger, ammonia cooler and separator are existing known equipment, and its principles and structure is all well known to those skilled in the art.
This process unit is compared with traditional Desulphurization Technology Coke Oven Gas device, has sulfide removal ability by force, and investment cost is low, technique is simple, the operation features such as easily row, operating cost be low.
This desulfurization purifier, the technological progress for fields such as China's coking industries, has very important realistic meaning.
Accompanying drawing explanation
Fig. 1 low-temp methanol Structure of Flue Gas Desulfuration Absorbing described in the utility model schematic diagram.
Fig. 2 catch box structural representation described in the utility model.
The structural representation of Fig. 3 coke oven gas purifying device described in the utility model.
1-tower body, 2-gas vent, the outlet of 3-bottom liquid, 4-the first catch box, 5-the second catch box, 6-liquid-inlet, 7-liquid outlet, 8-gas feed, 9-desulfurizing tower heat exchanger, 10-level board, 11-centre bore, 12-baffle plate, 13-choked flow cap, 14-the first desulfurizing tower, 15-oil removing, de-benzene, de-naphthalene device, 16-the first compression set, 17-the second compression set, 18-heat exchanger, 19-ammonia cooler, 20-separator, 21-the second desulfurizing tower.
The specific embodiment
A low-temp methanol desulfurizing tower, comprises the tower body 1 that the inside of vertically setting up is hollow, and the top of tower body 1 is provided with gas vent 2, and tower body bottom is provided with bottom liquid outlet 3; Tower body 1 inside is from top to bottom provided with the first catch box 4 and 5, two catch boxs of the second catch box are from top to bottom divided into three cavitys by tower body 1 inside; On the tower body sidewall of each cavity near its top, be equipped with liquid-inlet 6, upper cavity and middle cavity are provided with liquid outlet 7 near the tower body sidewall of its underpart; Lower chamber sidewall is provided with gas feed 8 near the position of bottom; The liquid outlet 7 of upper cavity is connected by the first circulation line with the liquid-inlet 6 of middle cavity; The liquid outlet 7 of middle cavity is connected by the second circulation line with the liquid-inlet 6 of lower chamber; Described catch box comprises a level board 10, and the middle part of level board 10 has centre bore 11, and the border, edge of centre bore 11 is provided with baffle plate 12 straight up, and baffle plate 12 tops are provided with choked flow cap 13, between described choked flow cap 13 and the upper end of baffle plate 12, has interval; Liquid outlet 7 positions of described upper cavity are lower than the upper end of the first catch box 4 baffle plates 12; Liquid outlet 7 positions of described middle cavity are lower than the upper end of the second catch box 5 baffle plates 12.Choked flow cap 13 is positioned at baffle plate 12 top positions that are tubular structure, just in time directly over centre bore 11, for stoping methyl alcohol to pass through.Choked flow cap 13 is arranged on the top of baffle plate by support.
On described first, second circulation line, be all serially connected with a desulfurizing tower heat exchanger 9.
A coke oven gas purifying device, comprises the oil removing connecting in turn, de-benzene, de-naphthalene device 15, the first compression set 16, the second compression set 17, heat exchanger 18, ammonia cooler 19 and separator 20; Between described the first compression set 16 and the second compression set 17, be connected with the first desulfurizing tower 14; Separator 20 gas vents are connected with the second desulfurizing tower 21; Described the first desulfurizing tower 14 and the second desulfurizing tower 21 all adopt low-temp methanol desulfurizing tower; Described the first desulfurizing tower 14 is serially connected between the first compression set 16 and the second compression set 17 by gas feed and gas vent; A gas feed of heat exchanger 18 is connected with the second compression set 17, and another gas feed of heat exchanger 18 is connected with the gas vent 2 of the second desulfurizing tower 21; The gas vent of separator 20 is connected with the gas feed 8 of the second desulfurizing tower 21.
The throughput direction that arrow direction in Fig. 3 is coke-stove gas.
Claims (3)
1. a low-temp methanol desulfurizing tower, comprises the tower body (1) that the inside of vertically setting up is hollow, and the top of tower body (1) is provided with gas vent (2), and tower body bottom is provided with bottom liquid outlet (3); It is characterized in that, tower body (1) inside is from top to bottom provided with the first catch box (4) and the second catch box (5), and two catch boxs are from top to bottom divided into three cavitys by tower body (1) inside; On the tower body sidewall of each cavity near its top, be equipped with liquid-inlet (6), upper cavity and middle cavity are provided with liquid outlet (7) near the tower body sidewall of its underpart; Lower chamber sidewall is provided with gas feed (8) near the position of bottom; The liquid outlet of upper cavity (7) is connected by the first circulation line with the liquid-inlet (6) of middle cavity; The liquid outlet of middle cavity (7) is connected by the second circulation line with the liquid-inlet (6) of lower chamber; Described catch box comprises a level board (10), the middle part of level board (10) has centre bore (11), the border, edge of centre bore (11) is provided with baffle plate (12) straight up, baffle plate (12) top is provided with choked flow cap (13), between described choked flow cap (13) and the upper end of baffle plate (12), has interval; The liquid outlet of described upper cavity (7) position is lower than the upper end of the first catch box (4) baffle plate (12); The liquid outlet of described middle cavity (7) position is lower than the upper end of the second catch box (5) baffle plate (12).
2. low-temp methanol desulfurizing tower as claimed in claim 1, is characterized in that, is all serially connected with a desulfurizing tower heat exchanger (9) on described first, second circulation line.
3. a coke oven gas purifying device, comprises the oil removing connecting in turn, de-benzene, de-naphthalene device (15), the first compression set (16), the second compression set (17), heat exchanger (18), ammonia cooler (19) and separator (20); It is characterized in that, between described the first compression set (16) and the second compression set (17), be connected with the first desulfurizing tower (14); Separator (20) gas vent is connected with the second desulfurizing tower (21); Described the first desulfurizing tower (14) and the second desulfurizing tower (21) all adopt low-temp methanol desulfurizing tower claimed in claim 1; Described the first desulfurizing tower (14) is serially connected between the first compression set (16) and the second compression set (17) by gas feed and gas vent; A gas feed of heat exchanger (18) is connected with the second compression set (17), and another gas feed of heat exchanger (18) is connected with the gas vent (2) of the second desulfurizing tower (21); The gas vent of separator (20) is connected with the gas feed (8) of the second desulfurizing tower (21).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320522134.0U CN203447956U (en) | 2013-08-26 | 2013-08-26 | Low-temperature methanol desulfurizing tower and coke oven gas purifying device utilizing same |
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| CN201320522134.0U CN203447956U (en) | 2013-08-26 | 2013-08-26 | Low-temperature methanol desulfurizing tower and coke oven gas purifying device utilizing same |
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| CN203447956U true CN203447956U (en) | 2014-02-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126530A (en) * | 2015-09-22 | 2015-12-09 | 中石化宁波工程有限公司 | Coking exhaust gas purification method |
| CN105126380A (en) * | 2015-09-22 | 2015-12-09 | 中石化宁波工程有限公司 | Coking exhaust gas treatment method |
| CN105169879A (en) * | 2015-09-22 | 2015-12-23 | 中石化宁波工程有限公司 | Coked tail gas processing method |
| CN107694269A (en) * | 2017-11-15 | 2018-02-16 | 山东日丽环保科技有限公司 | A kind of high effect dust cleaner and dust collecting process suitable for ammonia process desulfuration tower |
| CN111672283A (en) * | 2020-06-01 | 2020-09-18 | 中国石油化工股份有限公司 | Amine liquid desulfurizing tower |
-
2013
- 2013-08-26 CN CN201320522134.0U patent/CN203447956U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126530A (en) * | 2015-09-22 | 2015-12-09 | 中石化宁波工程有限公司 | Coking exhaust gas purification method |
| CN105126380A (en) * | 2015-09-22 | 2015-12-09 | 中石化宁波工程有限公司 | Coking exhaust gas treatment method |
| CN105169879A (en) * | 2015-09-22 | 2015-12-23 | 中石化宁波工程有限公司 | Coked tail gas processing method |
| CN105126530B (en) * | 2015-09-22 | 2017-09-12 | 中石化宁波工程有限公司 | A kind of coking exhaust purifying method |
| CN107694269A (en) * | 2017-11-15 | 2018-02-16 | 山东日丽环保科技有限公司 | A kind of high effect dust cleaner and dust collecting process suitable for ammonia process desulfuration tower |
| CN111672283A (en) * | 2020-06-01 | 2020-09-18 | 中国石油化工股份有限公司 | Amine liquid desulfurizing tower |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20200826 |