CN211471329U - Blast furnace gas desulfurization and desorption gas sintering treatment system - Google Patents
Blast furnace gas desulfurization and desorption gas sintering treatment system Download PDFInfo
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- CN211471329U CN211471329U CN201922197629.0U CN201922197629U CN211471329U CN 211471329 U CN211471329 U CN 211471329U CN 201922197629 U CN201922197629 U CN 201922197629U CN 211471329 U CN211471329 U CN 211471329U
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Abstract
The utility model relates to a blast furnace gas desulfurization and desorption gas sintering processing system, including heating device, the sintering machine, dust collector, desulphurization unit and adsorption tower, the built-in purification medium that is filled with of adsorption tower, the air inlet of adsorption tower loops through blast furnace gas inlet branch pipe and blast furnace gas inlet main pipe and is connected with TRT, the gas outlet of adsorption tower loops through the main pipe of giving vent to anger of clean coal gas and is connected with the main pipe of giving vent to anger of clean coal gas, heating device's regeneration gas export loops through the main pipe of giving vent to anger of regeneration desorption gas and is connected with the gas outlet of adsorption tower with regeneration desorption gas inlet branch pipe, heating device's regeneration gas entry and the main pipe of giving vent to anger of clean coal gas are connected, the gas pipeline of sintering machine is connected with the air inlet of adsorption tower, the flue gas. The utility model solves the technical problem of poor gas purification effect in blast furnace gas.
Description
Technical Field
The utility model relates to a coal gas desulfurization technical field especially relates to a blast furnace gas desulfurization and desorption gas sintering processing system.
Background
Blast furnace gas is a main byproduct generated in an iron-making process flow and is colorless and tasteless combustible gas. The theoretical combustion temperature is 1400-1500 ℃, and the ignition point is about 700 ℃. The blast furnace gas is characterized by low heat value (3300-4200 kJ/Nm)3) And the gas production is large, and the gas is easy to explode when being mixed with air. The main components of blast furnace gas are: 25 to 30 percent of CO; h21.5％～3.0％；CH40.2％～0.5％；N255％～60％；CO 29％～12％；O20.2％～0.4％。
In recent decades, with the widespread use of blast furnace gas dry bag dust removal and blast furnace gas top pressure turbine power generation (TRT), the pressure of blast furnace gas has beenThe force energy and the heat energy are fully recovered. The blast furnace gas after pressure energy and heat energy are recovered by the residual pressure turbine power generation device is sent to users such as hot blast stoves, heating furnaces, coke ovens, boilers, sintering, pellets and the like to be used as fuel. After the blast furnace gas is combusted, sulfur in the discharged gas is mainly in the form of SO2The content is 45-185 mg/m3The exhaust is carried out after the purification reaches the standard, and the limit value of the particulate matter exhaust after the blast furnace gas combustion is 10mg/m along with the strict requirement of environmental protection3SO in gas2Emission limit of 35mg/m3Emission limit of nitrogen oxides of 50mg/m3. The traditional desulfurization method is to perform desulfurization on coal gas, mainly adopts the processes of a calcium method, a magnesium method, a sodium method, an ammonia method, an organic alkali method and the like, but compared with blast furnace gas, the volume of the combusted coal gas is increased, the temperature is high, the pressure is low, so that a coal gas desulfurization device is huge, the water consumption is high, circulating water needs to be treated separately, and the defects of high desulfurization cost, secondary pollution and the like are caused. The method for treating the blast furnace gas source is mainly to adopt the traditional wet scrubbing desulfurization after the residual pressure turbine power generation device, wherein H is2S、SO2Etc. are easy to be removed, and COS and CS in blast furnace gas2The SO in the gas after the combustion of the blast furnace gas is not easy to remove2The content is still out of limits. At present, most of the purification of the gas in the blast furnace gas, especially the removal of sulfides, has the defects of complex system structure, complex operation and control, poor purification effect and the like, and no economical and feasible method and equipment exist in the purification process of the blast furnace gas.
Aiming at the problem of poor purification effect of coal gas in blast furnace gas in the related art, no effective solution is provided at present.
Therefore, the inventor provides a blast furnace gas desulfurization and desorption gas sintering treatment system by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a blast furnace gas desulfurization and desorption gas sintering processing system, it is good to blast furnace gas purifying effect, have structure and operation flow simple, with low costs, no secondary pollution's advantage.
The purpose of the utility model can be realized by adopting the following technical scheme:
the utility model provides a blast furnace gas desulfurization and desorption gas sintering processing system, blast furnace gas desulfurization and desorption gas sintering processing system includes heating device, sintering machine, dust collector, desulphurization unit and a plurality of adsorption towers, wherein:
purifying media are filled in each adsorption tower, the air inlet of each adsorption tower is respectively connected with one end of a corresponding blast furnace gas inlet branch pipe, the other end of each blast furnace gas inlet branch pipe is connected with a blast furnace gas inlet main pipe, the blast furnace gas inlet main pipe is connected with a gas outlet of a TRT, the gas outlet of each adsorption tower is respectively connected with one end of a corresponding clean gas outlet branch pipe, and the other end of each clean gas outlet branch pipe is connected with the clean gas outlet main pipe;
a regenerated gas outlet of the heating device is connected with one end of a regenerated desorption gas inlet main pipe, the other end of the regenerated desorption gas inlet main pipe is connected with one end of a plurality of regenerated desorption gas inlet branch pipes, the other end of each regenerated desorption gas inlet branch pipe is connected with a corresponding gas outlet of the adsorption tower, a regenerated gas inlet of the heating device is connected with one end of a first clean gas return pipe, the other end of the first clean gas return pipe is connected with a clean gas outlet main pipe, the first clean gas return pipe is connected with one end of a second clean gas return pipe, and the other end of the second clean gas return pipe is connected with the regenerated desorption gas inlet main pipe;
the gas inlet pipeline of the sintering machine is connected with one end of a desorption and desorption gas outlet main pipe, the other end of the desorption and desorption gas outlet main pipe is connected with one end of a plurality of desorption and desorption gas outlet branch pipes, the other end of each desorption and desorption gas outlet branch pipe is connected with the corresponding gas inlet of the adsorption tower, the flue gas pipeline of the sintering machine is connected with the gas inlet of the dust removal device, and the gas outlet of the dust removal device is connected with the gas inlet of the desulfurization device.
In a preferred embodiment of the present invention, the blast furnace gas inlet branch pipe is provided with a first valve, and the clean gas outlet branch pipe is provided with a third valve.
In a preferred embodiment of the present invention, a fifth valve is disposed on the main pipe for the regeneration desorption gas inlet, a fourth valve is disposed on the branch pipe for the regeneration desorption gas inlet, and an eighth valve and a seventh valve are sequentially disposed on the first return pipe for clean gas between the main pipes for the clean gas outlet, and a sixth valve is disposed on the second return pipe for clean gas.
The utility model discloses an in a preferred embodiment, be provided with the regeneration gas fan on the first clean gas muffler, the regeneration gas fan is located the eighth valve with between the seventh valve, the second clean gas muffler is connected the eighth valve with on the first clean gas muffler between the regeneration gas fan.
The utility model discloses a in a preferred embodiment, desorption gas is given vent to anger and is provided with the ninth valve on being responsible for, desorption gas is provided with the second valve on giving vent to anger the branch pipe, the sintering machine with be provided with the tenth valve on the gas-supply line between the dust collector.
In a preferred embodiment of the present invention, the air inlet of the adsorption tower is located in the lower part of the adsorption tower, the air outlet of the adsorption tower is located in the top of the adsorption tower, and the purification medium is filled in the air inlet of the adsorption tower and between the air outlets of the adsorption tower.
In a preferred embodiment of the present invention, the blast furnace gas inlet main pipe is provided with a spray cooling device for reducing the temperature of the gas in the pipe.
In a preferred embodiment of the present invention, the heating device includes a heat exchanger and a heater, the regenerated gas inlet of the heat exchanger is connected to the first clean gas return pipe, the regenerated gas outlet of the heat exchanger is connected to the regenerated gas inlet of the heater, and the regenerated gas outlet of the heater is connected to the regenerated desorbed gas inlet main pipe.
In a preferred embodiment of the present invention, the sintering machine includes a sintering machine main body and an igniter, the sintering machine main body is provided with a flue gas pipeline and a gas inlet pipeline, and the igniter is disposed on the gas inlet pipeline of the sintering machine main body.
In a preferred embodiment of the present invention, the purification medium is a hydrophobic microcrystalline material.
In a preferred embodiment of the present invention, at least one of the adsorption towers is a spare adsorption tower.
From the above, the utility model discloses a blast furnace gas desulfurization and desorption gas sintering processing system's characteristics and advantage are: the purification medium is filled in the adsorption tower, and the impurities such as hydrogen sulfide, organic sulfur and the like in the blast furnace gas are adsorbed and removed through the purification medium, so that the influence of water contained in the blast furnace gas on sulfur removal is reduced, and the adsorption efficiency of sulfur-containing impurities is improved. The regenerated gas outlet of the heating device is connected with the gas outlet of the adsorption tower, the regenerated gas inlet of the heating device is connected with the purified gas outlet main pipe, the gas inlet of the adsorption tower is connected with the gas inlet pipeline of the sintering machine, the flue gas pipeline of the sintering machine is sequentially connected with the dust removal device and the desulfurization device, the purified blast furnace gas in the purified gas outlet main pipe is used as the regenerated gas to enter the adsorption tower, the purification medium can be desorbed and regenerated under the heating action of the regenerated gas and can be used for in-situ catalytic conversion of organic sulfur into inorganic sulfur, and the regenerated gas and sulfur-containing compounds (most of which are H) are used2S) desorption gas mix and form desorption gas and discharge to carry out high temperature combustion in the sintering machine, trade sulfur dioxide and mix in the flue gas with all sulfides that contain in the coal gas, the flue gas that will only contain sulfur dioxide loops through dust collector and desulphurization unit again, with dust and sulfur dioxide in getting rid of the flue gas, thereby can discharge the flue gas after purifying to the outside, whole process can carry out abundant recovery and getting rid of to the sulphur resource that contains in the blast furnace gas, reach the purpose to the high-efficient sulphur removal of blast furnace gas, the utility model discloses simple structure, except that sulphur convenient operation, the energy saving can avoid secondary pollution. In addition, through the arrangement of the sintering machine, the dust removal device and the desulfurization device, the purification equipment of the sintering machine can be utilized to complete dust removal and desulfurization treatment, and the guarantee of dust removal and desulfurization treatment is ensuredAnd completely removing sulfides in the discharged flue gas to reach the external discharge standard.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1: is a structural schematic diagram of the blast furnace gas desulfurization and desorption gas sintering treatment system of the utility model.
The utility model provides a reference numeral:
1. an adsorption tower; 2. A blast furnace gas inlet main pipe;
201. a blast furnace gas inlet branch pipe; 3. A heat exchanger;
4. a heater; 5. A regeneration gas fan;
6. a spray cooling device; 7. A clean gas outlet main pipe;
701. a clean gas outlet branch pipe; 8. A main regenerative desorption gas inlet pipe;
801. a regeneration desorption gas inlet branch pipe; 9. Desorbing desorption gas outlet main pipe;
901. a desorption gas outlet branch pipe; 10. Sintering machine;
1001. a sintering machine main body; 1002. An igniter;
11. TRT; 12. A gas purifying user;
13. a dust removal device; 14. A desulfurization unit;
15. a factory building chimney; 16. A second clean gas return pipe;
17. a first clean gas return pipe; v1, first valve;
v2, second valve; v3, third valve;
v4, fourth valve; v5, fifth valve;
v6, sixth valve; v7, seventh valve;
v8, eighth valve; v9, ninth valve;
v10, tenth valve.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a blast furnace gas desulfurization and desorption gas sintering processing system, this blast furnace gas desulfurization and desorption gas sintering processing system include heating device, sintering machine 10, dust collector 13, desulphurization unit 14 and a plurality of adsorption tower 1, wherein: each adsorption tower 1 is internally provided with a packing layer filled with a purification medium, the air inlet of each adsorption tower 1 is respectively connected with one end of a corresponding blast furnace gas inlet branch pipe 201, the other end of each blast furnace gas inlet branch pipe 201 is connected with a blast furnace gas inlet main pipe 2, the blast furnace gas inlet main pipe 2 is connected with the gas outlet of a TRT (blast furnace gas residual pressure turbine power generation device) 11, the air outlet of each adsorption tower 1 is respectively connected with one end of a corresponding clean gas outlet branch pipe 701, the other end of each clean gas outlet branch pipe 701 is connected with a clean gas outlet main pipe 7, and the other end of the clean gas outlet main pipe 7 is connected with a clean gas user 12 in a subsequent section. The regeneration gas outlet of the heating device is connected with one end of the regeneration desorption gas inlet main pipe 8, the other end of the regeneration desorption gas inlet main pipe 8 is connected with one end of a plurality of regeneration desorption gas inlet branch pipes 801, the other end of each regeneration desorption gas inlet branch pipe 801 is connected with the corresponding gas outlet of the adsorption tower 1, the regeneration gas inlet of the heating device is connected with one end of the first clean gas air return pipe 17, the other end of the first clean gas air return pipe 17 is connected with the clean gas outlet main pipe 7, the first clean gas air return pipe 17 is connected with one end of the second clean gas air return pipe 16, and the other end of the second clean gas air return pipe 16 is connected with the regeneration desorption gas inlet main pipe 8. The gas inlet pipeline of the sintering machine 10 is connected with one end of the desorption gas outlet main pipe 9, the other end of the desorption gas outlet main pipe 9 is connected with one end of the desorption gas outlet branch pipes 901, the other end of each desorption gas outlet branch pipe 901 is connected with the corresponding gas inlet of the adsorption tower 1, the flue gas pipeline of the sintering machine 10 is connected with the gas inlet of the dust removal device 13, the gas outlet of the dust removal device 13 is connected with the gas inlet of the desulfurization device 14, and the gas outlet of the desulfurization device 14 is connected with the factory building chimney 15.
The utility model discloses be filled with the purification medium in adsorption tower 1, adsorb impurity such as hydrogen sulfide and organic sulfur in the desorption blast furnace gas through the purification medium, reduce the influence of moisture in the blast furnace gas to the sulphur removal, improve the adsorption efficiency to containing sulphur impurity. The regenerated gas outlet of the heating device is connected with the gas outlet of the adsorption tower 1, the regenerated gas inlet of the heating device is connected with the purified gas outlet main pipe 7, the gas inlet of the adsorption tower 1 is connected with the gas inlet pipeline of the sintering machine 10, the flue gas pipeline of the sintering machine 10 is sequentially connected with the dust removal device 13 and the desulfurization device 14, the purified blast furnace gas in the purified gas outlet main pipe 7 is used as the regenerated gas to enter the adsorption tower 1, the purification medium can be desorbed and regenerated under the heating action of the regenerated gas and can be used for in-situ catalytic conversion of organic sulfur into inorganic sulfur, and the regenerated gas and sulfur-containing compounds (most of which are H)2S) desorption gas mix and form desorption gas and discharge to carry out high temperature combustion in sintering machine 10, convert the whole sulphide that contains in the coal gas into sulfur dioxide and mix in the flue gas, the flue gas that will only contain sulfur dioxide loops through dust collector 13 and desulphurization unit 14 again, with dust and the sulfur dioxide in getting rid of the flue gas, thereby can discharge the flue gas after purifying outside, whole process can carry out abundant recovery and getting rid of to the sulphur resource that contains in the blast furnace gas, reach the purpose of the high-efficient sulphur removal of blast furnace gas, the utility model discloses simple structure, except sulphur convenient operation, the energy saving can avoid secondary pollution. In addition, through the arrangement of the sintering machine 10, the dust removal device 13 and the desulfurization device 14, the dust removal and desulfurization treatment can be completed by using the purification equipment of the sintering machine, and the removal of sulfides in the externally discharged flue gas is ensured so as to reach the standard of external emission.
Specifically, as shown in fig. 1, a first valve V1 is provided on the blast furnace gas inlet branch pipe 201, and a third valve V3 is provided on the clean gas outlet branch pipe 701. The main regeneration desorption gas inlet pipe 8 is provided with a fifth valve V5, the branch regeneration desorption gas inlet pipe 801 is provided with a fourth valve V4, the first clean gas return pipe 17 between the regeneration gas inlet of the heating device and the main clean gas outlet pipe 7 is sequentially provided with an eighth valve V8 and a seventh valve V7, and the second clean gas return pipe 16 is provided with a sixth valve V6. The first clean gas return pipe 17 is provided with a regenerated gas fan 5, the regenerated gas fan 5 is positioned between the eighth valve V8 and the seventh valve V7, and the second clean gas return pipe 16 is connected to the first clean gas return pipe 17 between the eighth valve V8 and the regenerated gas fan 5. The desorption gas main gas outlet pipe 9 is provided with a ninth valve V9, the desorption gas branch gas outlet pipe 901 is provided with a second valve V2, and a tenth valve V10 is arranged on a gas transmission pipeline between the sintering machine 10 and the dust removing device 13. The on-off of the corresponding pipeline is controlled by controlling the opening and closing states of the valves, so that the desulfurization of the blast furnace gas is completed.
Furthermore, a temperature detection device is arranged in the packing layer, the temperature of the purification medium can be detected in real time through the temperature detection device, and the temperature of the packing layer can be adjusted according to the requirement.
The temperature detecting device may be, but is not limited to, a temperature sensor.
Further, the inner diameter of the adsorption column 1 is 4m to 8 m.
In the utility model, the purifying medium is a hydrophobic microcrystal material.
Further, the hydrophobic microcrystalline material can be made of a material containing at least one element of magnesium, calcium, strontium, yttrium, lanthanum, cerium, europium, iron, cobalt, nickel, copper, silver, zinc and the like, and specifically, the hydrophobic microcrystalline material is selected from at least one of X-type molecular sieve, Y-type molecular sieve, A-type molecular sieve, ZSM-type molecular sieve, mordenite, β -type molecular sieve, MCM-type molecular sieve and SAPO-type molecular sieve, wherein the catalyst for converting organic sulfur into inorganic sulfur comprises an iron-cobalt-manganese-molybdenum-nickel catalyst, CO-K-Al catalyst and a mixed catalyst2O3、ZrO2/TiO2At least one of catalysts; and in practical implementation, the amount of the catalyst can be reasonably set by a person skilled in the art according to the field operation requirement.
Furthermore, the hydrophobic microcrystalline material is made of a zinc-modified ZSM-5 molecular sieve material or a copper-modified ZSM-5 molecular sieve material, and the silicon-aluminum ratio of the molecular sieve material is 150; the hydrophobic microcrystalline material contains ZSM molecular sieve adsorbent, etc., and contains Co-Mo-Ni catalyst.
Specifically, as shown in fig. 1, an air inlet of the adsorption tower 1 is located at the lower part of the adsorption tower 1, an air outlet of the adsorption tower 1 is located at the top of the adsorption tower 1, a purification medium is filled between the air inlet of the adsorption tower 1 and the air outlet of the adsorption tower 1, blast furnace gas enters the adsorption tower 1 from the air inlet at the lower part of the adsorption tower 1 and passes through the purification medium from bottom to top, and after impurities such as hydrogen sulfide and organic sulfur in the blast furnace gas are sufficiently adsorbed by the purification medium, the obtained purified blast furnace gas is discharged through the air outlet at the top of the adsorption tower 1.
Further, as shown in fig. 1, a spray cooling device 6 for reducing the temperature of the gas in the blast furnace gas inlet main pipe 2 is provided, and the blast furnace gas is cooled by the spray cooling device 6 before entering the adsorption tower 1, so that the adsorption tower 1 is kept at a temperature at which the adsorption capacity of the purification medium is strong, and the optimal adsorption effect on impurities such as hydrogen sulfide and organic sulfur is achieved.
Further, the spray cooling device 6 may be, but is not limited to, a plurality of atomization nozzles disposed on the blast furnace gas inlet main 2.
In an optional embodiment of the present invention, as shown in fig. 1, the heating device includes a heat exchanger 3 and a heater 4, a regeneration gas inlet of the heat exchanger 3 is connected to the first clean gas return pipe 17, a regeneration gas outlet of the heat exchanger 3 is connected to a regeneration gas inlet of the heater 4, and a regeneration gas outlet of the heater 4 is connected to the regeneration desorption gas inlet main pipe 8. Cooperate through heat exchanger 3 and heater 4 and heat the intensification and handle the regeneration gas, need not extra regulation and control and detect and can guarantee to heat the regeneration gas to predetermineeing the temperature, control the convenience, can guarantee that hydrophobic type microcrystalline material adsorbed organic sulfur can turn into inorganic sulfur to the desorption can reach abundant desulfurization effect in to the desorption gas.
Further, the heat exchanger 3 is a steam heat exchanger, and the heater 4 is an electric heater.
In an alternative embodiment of the present invention, as shown in fig. 1, the sintering machine 10 includes a sintering machine main body 1001 and an igniter 1002, the sintering machine main body 1001 is provided with a flue gas pipeline and a gas inlet pipeline, and the igniter 1002 is provided on the gas inlet pipeline of the sintering machine main body 1001. The desorption gas and air are mixed and enter a gas inlet pipeline of the sintering machine main body 1001, the desorption gas is ignited through an igniter 1002 and then is combusted in the sintering machine main body 1001, all sulfides in the desorption gas are converted into sulfur dioxide in the combustion process, the sulfur dioxide is discharged along with the combusted flue gas through a flue gas pipeline arranged on the sintering machine main body 1001, and the discharged flue gas containing the sulfur dioxide is purified sequentially through a dust removal device 13 and a desulfurization device 14 and then reaches the standard of external discharge.
Further, the dust removing device 13 may be, but is not limited to, a bag-type dust remover.
Further, the desulfurization unit 14 may be, but is not limited to, a spray tower.
Further, at least one of the adsorption columns 1 is a spare adsorption column.
The utility model discloses a basic operating principle does: the sulfur content of the TRT11 externally discharged blast furnace gas is 40-160 mg/m3Of inorganic sulfur (most of which are H)2S) content of 10-50 mg/m3Organic sulfur content of 80-150 mg/m3The temperature of the blast furnace gas is reduced to 40-60 ℃ through a spray cooling device 6, then the gas enters an adsorption tower 1, the adsorption tower 1 is filled with hydrophobic microcrystalline materials, and H in the blast furnace gas2S, etc. inorganic sulfur, COS and CS2The organic sulfur and other impurities are absorbed by the hydrophobic microcrystalline material in the absorption tower 1, and the sulfur content in the absorbed blast furnace gas is less than 20mg/m3And is conveyed to subsequent working sections for use through the clean gas outlet main pipe 7 and the clean gas outlet branch pipe 701 in sequence. Wherein, the quantity of adsorption tower 1 is more than or equal to 2, and at least 1 is reserve adsorption tower, and the hydrophobic type microcrystalline material that loads in adsorption tower 1 possesses stronger adsorption efficiency when the temperature is 20 ~ 80 ℃, and it can desorption regeneration at 160 ~ 350 ℃, and organic sulfur that is adsorbed is by normal position catalytic conversion inorganic sulfur during regeneration. And after the adsorption of all the adsorption towers 1 reaches the preset saturation threshold, starting the standby adsorption tower, and performing regeneration operation on the adsorption tower 1 with the adsorption reaching the saturation threshold. Wherein the regeneration operation is: regenerated airThe machine 5 extracts a small amount of clean blast furnace gas from the clean gas outlet main pipe 7, the clean blast furnace gas passes through the first clean gas return pipe 17 and then is subjected to double heating of the heat exchanger 3 and the heater 4 in sequence, the regenerated gas is heated to 160-350 ℃, and then the regenerated gas passes through the regenerated desorption gas inlet main pipe 8 and each regenerated desorption gas inlet branch pipe 801 in sequence and enters each adsorption tower 1. The regeneration process of the adsorption tower 1 is divided into three processes of temperature rise, heat preservation and cold blowing, the regeneration time of each adsorption tower 1 is about 60 hours, sulfides, impurities and the like adsorbed by the hydrophobic microcrystalline material are desorbed into desorption gas in the regeneration process, and organic sulfur in the desorption gas is converted into H2S and other inorganic sulfur are desorbed into desorption gas, the desorption gas mixed with the inorganic sulfur and impurities in the adsorption tower 1 is called desorption gas, and the desorption gas mainly contains H2S and impurities, the general regeneration process needs 1-5 days, preferably 3 days, desorption gas in the adsorption tower 1 sequentially passes through the desorption gas outlet branch pipe 901 and the desorption gas outlet main pipe 9 to enter the sintering machine 10 to be mixed with air and then to be combusted, all sulfides in the desorption gas are converted into sulfur dioxide, gas containing sulfur dioxide and discharged from the sintering machine 10 sequentially passes through the dust removal device 13 and the desulfurization device 14 to be subjected to dust removal and desulfurization treatment, and the gas is purified to reach the standard of external emission and is discharged from a factory building chimney 15.
The utility model discloses carry the desorption gas in the adsorption tower 1 to carry out the concrete operation flow who discharges outward in the factory building chimney 15 and do:
350000Nm as shown in FIG. 13After the blast furnace gas is subjected to TRT power generation, the total sulfur content in the blast furnace gas is less than 200mg/m3In which H is2S content of 30%, COS and CS2The content of the dust is 70 percent, the pressure of the blast furnace gas is 12-16 kPa, and the dust content is less than 10mg/m3The gas temperature was about 90 ℃. At this time, the adsorption tower 1 located at the rearmost end is used as a spare adsorption tower, the first valve V1 and the third valve V3 of each of the other adsorption towers 1 are opened, the other valves are closed, the blast furnace gas passes through the main blast furnace gas inlet pipe 2, each of the blast furnace gas inlet branch pipes 201, and the gas inlets of the adsorption towers 1 in this order, and enters each of the adsorption towers 1, and the blast furnace gas is subjected to mist cooling by the mist cooling device 6 before entering the adsorption towers 1And (5) reducing the temperature to about 60 ℃. When blast furnace gas passes through the packing layer in the adsorption tower 1, H2S, etc. inorganic sulfur and organic sulfur (COS and CS)2Etc.) and impurities are absorbed by the hydrophobic microcrystalline material, and the total sulfur content of the purified blast furnace gas is less than 20mg/m3The obtained purified blast furnace gas is discharged from the gas outlet of the adsorption tower 1 to the purified gas outlet branch pipes 701, and each purified gas outlet branch pipe 701 is collected to the purified gas outlet main pipe 7 and then conveyed to a subsequent purified blast furnace gas working section for subsequent treatment. After 3 days of operation, the first valve V1 and the third valve V3 of the spare adsorption tower are opened, the first valve V1 and the third valve V3 of the adsorption tower 1 positioned at the frontmost end are closed, the adsorption tower 1 positioned at the frontmost end is regenerated, meanwhile, the regenerated gas fan 5 is started, the seventh valve V7, the eighth valve V8, the fifth valve V5 and the fourth valve V4 corresponding to the adsorption tower 1 positioned at the frontmost end are opened, clean blast furnace gas in the blast furnace gas inlet main pipe 2 enters the regenerated gas fan 5, the gas amount is 3000Nm3And h, pressurizing the blast furnace gas by a regeneration gas fan 5 by 10kPa, and heating the pressurized regeneration gas (namely the clean blast furnace gas) by a heat exchanger 3 and a heater 4 in sequence. The heated regeneration gas enters the adsorption tower 1 at the most front end through the regeneration desorption gas inlet main pipe 8, the regeneration desorption gas inlet branch pipe 801 and the gas outlet of the adsorption tower 1 at the most front end in sequence, when the regeneration desorption gas in the adsorption tower 1 passes through the packing layer, the packing layer is heated, the packing layer is provided with a temperature detection device, the change of the temperature of the packing layer can be detected in real time, when the temperature of the packing layer reaches 200 ℃, the heat is preserved, the temperature is maintained at 180-210 ℃, and at the moment, the H adsorbed by the hydrophobic microcrystalline material2S and other inorganic sulfur and organic sulfur are desorbed, the organic sulfur is converted into inorganic sulfur in situ during desorption, the inorganic sulfur is desorbed and then enters regenerated desorption gas to be called desorption gas, and the content of hydrogen sulfide in the desorption gas is 20g/m3And also contains a small amount of organic sulfur. The desorption gas in the adsorption tower 1 at the foremost end sequentially passes through the gas inlet of the adsorption tower 1, the desorption gas outlet branch pipe 901 and the desorption gas outlet main pipe 9, enters the sintering machine 10, is mixed with air and then is combusted, all sulfides in the desorption gas are converted into sulfur dioxide in the combustion process in the sintering machine 10,the flue gas containing sulfur dioxide discharged from the sintering machine 10 after combustion is subjected to dust removal and desulfurization treatment sequentially through a dust removal device 13 and a desulfurization device 14, and is discharged from a factory building chimney 15 after purification. After the thermal desorption of the adsorption tower 1 located at the forefront was continued for 1 day, the adsorption tower 1 was cooled. And closing the eighth valve V8 and the fifth valve V5, and simultaneously opening the sixth valve V6, so that the purified blast furnace gas enters the adsorption tower 1 at the foremost end through the main regeneration desorption gas inlet pipe 8 and the branch regeneration desorption gas inlet pipe 801 to be cooled, and the next adsorption tower 1 can be regenerated after the cooling process is finished. When it is necessary to start the regeneration of the next adsorption tower 1, the sixth valve V6, the fourth valve V4 and the second valve V2 corresponding to the adsorption tower 1 located at the forefront are closed, the first valve V1 and the third valve V3 corresponding to the adsorption tower 1 located at the forefront are opened, the first valve V1 and the third valve V3 corresponding to the next adsorption tower 1 are closed, and the desorption regeneration of the next adsorption tower 1 is performed in the same manner as described above.
The utility model discloses blast furnace gas desulfurization and desorption gas sintering processing system's characteristics and advantage are:
firstly, the adsorption tower 1 in the blast furnace gas desulfurization and stripping gas sintering treatment system adsorbs and removes impurities such as hydrogen sulfide and organic sulfur in the blast furnace gas, reduces the influence of water content in the blast furnace gas on desulfurization, and improves the adsorption efficiency of sulfur-containing impurities.
And secondly, the clean blast furnace gas in the clean gas outlet main pipe 7 in the blast furnace gas desulfurization and desorption gas sintering treatment system is heated by a heating device and then is introduced into the adsorption tower 1 as regenerated gas, so that the required regenerated gas amount is small, the sulfur concentration in the desorption gas is high, the energy consumption is low, the working cost is reduced, and the system is suitable for popularization and use.
Thirdly, the high concentration H is contained in the blast furnace gas desulfurization and desorption gas sintering treatment system2The desorption gas of S is conveyed to the sintering machine 10, the sulfides in the desorption gas can be completely converted into sulfur dioxide, the flue gas mixed with the sulfur dioxide sequentially passes through the dust removal device 13 and the desulfurization device 14, the dust removal and desulfurization treatment of the flue gas can be completed, the removal of inorganic sulfur and organic sulfur in the discharged flue gas is ensured, the equipment structure is simple, and the equipment structure is simpleThe blast furnace gas can reach the standard for use, the sulfur resource can be fully recovered, the energy is saved, the secondary pollution is avoided, and the externally discharged flue gas can reach the externally discharged standard.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (11)
1. The blast furnace gas desulfurization and desorption gas sintering treatment system is characterized by comprising a heating device, a sintering machine (10), a dust removal device (13), a desulfurization device (14) and a plurality of adsorption towers (1), wherein:
purifying media are filled in each adsorption tower (1), the air inlet of each adsorption tower (1) is respectively connected with one end of a corresponding blast furnace gas inlet branch pipe (201), the other end of each blast furnace gas inlet branch pipe (201) is connected with a blast furnace gas inlet main pipe (2), the blast furnace gas inlet main pipe (2) is connected with a gas outlet of a TRT (11), the air outlet of each adsorption tower (1) is respectively connected with one end of a corresponding clean gas outlet branch pipe (701), and the other end of each clean gas outlet branch pipe (701) is connected with a clean gas outlet main pipe (7);
a regenerated gas outlet of the heating device is connected with one end of a regenerated desorption gas inlet main pipe (8), the other end of the regenerated desorption gas inlet main pipe (8) is connected with one end of a plurality of regenerated desorption gas inlet branch pipes (801), the other end of each regenerated desorption gas inlet branch pipe (801) is connected with a corresponding gas outlet of the adsorption tower (1), a regenerated gas inlet of the heating device is connected with one end of a first clean gas return pipe (17), the other end of the first clean gas return pipe (17) is connected with the clean gas outlet main pipe (7), the first clean gas return pipe (17) is connected with one end of a second clean gas return pipe (16), and the other end of the second clean gas return pipe (16) is connected with the regenerated desorption gas inlet main pipe (8);
the gas inlet pipeline of the sintering machine (10) is connected with one end of a desorption gas outlet main pipe (9), the other end of the desorption gas outlet main pipe (9) is connected with one end of a plurality of desorption gas outlet branch pipes (901), the other end of each desorption gas outlet branch pipe (901) is connected with the corresponding gas inlet of the adsorption tower (1), the flue gas pipeline of the sintering machine (10) is connected with the gas inlet of the dust removal device (13), and the gas outlet of the dust removal device (13) is connected with the gas inlet of the desulfurization device (14).
2. The blast furnace gas desulfurization and stripping gas sintering treatment system according to claim 1, wherein a first valve (V1) is disposed on the blast furnace gas inlet branch pipe (201), and a third valve (V3) is disposed on the clean gas outlet branch pipe (701).
3. The blast furnace gas desulfurization and stripping gas sintering treatment system according to claim 1, wherein a fifth valve (V5) is disposed on the main regeneration stripping gas inlet pipe (8), a fourth valve (V4) is disposed on the branch regeneration stripping gas inlet pipe (801), an eighth valve (V8) and a seventh valve (V7) are sequentially disposed on the first clean gas return pipe (17) from the regeneration gas inlet of the heating device to the main clean gas outlet pipe (7), and a sixth valve (V6) is disposed on the second clean gas return pipe (16).
4. The blast furnace gas desulfurization and stripping gas sintering treatment system according to claim 3, characterized in that a regeneration gas fan (5) is disposed on the first clean gas return pipe (17), the regeneration gas fan (5) is located between the eighth valve (V8) and the seventh valve (V7), and the second clean gas return pipe (16) is connected to the first clean gas return pipe (17) between the eighth valve (V8) and the regeneration gas fan (5).
5. The blast furnace gas desulfurization and desorption gas sintering treatment system according to claim 1, wherein a ninth valve (V9) is provided on the main desorption gas outlet pipe (9), a second valve (V2) is provided on the branch desorption gas outlet pipe (901), and a tenth valve (V10) is provided on a gas transmission pipeline between the sintering machine (10) and the dust removal device (13).
6. The blast furnace gas desulfurization and stripping gas sintering treatment system according to claim 1, characterized in that the gas inlet of the adsorption tower (1) is located at the lower part of the adsorption tower (1), the gas outlet of the adsorption tower (1) is located at the top of the adsorption tower (1), and the purification medium is filled between the gas inlet of the adsorption tower (1) and the gas outlet of the adsorption tower (1).
7. The blast furnace gas desulfurization and stripping gas sintering treatment system according to claim 1, characterized in that the blast furnace gas inlet main pipe (2) is provided with a spray cooling device (6) for reducing the temperature of the gas in the pipe.
8. The blast furnace gas desulfurization and stripping gas sintering treatment system according to claim 1, wherein the heating device comprises a heat exchanger (3) and a heater (4), a regeneration gas inlet of the heat exchanger (3) is connected to the first clean gas return pipe (17), a regeneration gas outlet of the heat exchanger (3) is connected to a regeneration gas inlet of the heater (4), and a regeneration gas outlet of the heater (4) is connected to the regeneration stripping gas inlet main pipe (8).
9. The blast furnace gas desulfurization and desorption gas sintering treatment system according to claim 1, wherein the sintering machine (10) comprises a sintering machine main body (1001) and an igniter (1002), a flue gas pipeline and a gas inlet pipeline are provided on the sintering machine main body (1001), and the igniter (1002) is provided on the gas inlet pipeline of the sintering machine main body (1001).
10. The blast furnace gas desulfurization and stripping gas sintering treatment system according to claim 1, wherein the purification medium is a hydrophobic microcrystalline material.
11. The blast furnace gas desulfurization and stripping gas sintering treatment system according to claim 1, characterized in that at least one of the adsorption towers (1) is a spare adsorption tower.
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| CN112322363A (en) * | 2020-11-02 | 2021-02-05 | 东北大学 | Nano composite zeolite adsorption blast furnace gas fine desulfurization process and device |
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