CN206692604U - A kind of system for preparing water-gas with oven gas and water-coal-slurry - Google Patents
A kind of system for preparing water-gas with oven gas and water-coal-slurry Download PDFInfo
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- CN206692604U CN206692604U CN201720512379.3U CN201720512379U CN206692604U CN 206692604 U CN206692604 U CN 206692604U CN 201720512379 U CN201720512379 U CN 201720512379U CN 206692604 U CN206692604 U CN 206692604U
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Abstract
The utility model discloses a kind of system for preparing water-gas with oven gas and water-coal-slurry, the system includes oven gas separative element, gas holder, first compression unit, pre- desulfurization unit and the second compression unit, the outlet of the oven gas of the oven gas separative element is connected with the entrance of the gas holder, the outlet of the gas holder is connected with the air inlet of first compression unit, the gas outlet of first compression unit is connected it with the air inlet of the pre- desulfurization unit includes coal water slurry gasification unit, water-coal-slurry preparation unit, CO converter units and desulfurization and decarburization unit, the coal water slurry gasification unit has Multichannel combination burner, second compression unit, the water-coal-slurry preparation unit is connected by pipeline with the gasifier nozzle.The advantages of system process that the utility model prepares water-gas with oven gas with water-coal-slurry is simple, and operating flexibility is big, overall invest reduces, and high with the continuous operation ratio of system, and consumption is low, workable, and security is good.
Description
Technical field
It the utility model is related to technical field of coal chemical industry, and in particular to a kind of to prepare water-gas with oven gas and water-coal-slurry
System.
Background technology
Oven gas, also known as coke-stove gas, refer to use coal for coking in coke oven after high-temperature retorting, in output coke
While with tar product, a kind of imflammable gas of generation, be coking industry byproduct.Oven gas composition is sufficiently complex,
Mainly it is made up of hydrogen and methane, other are also containing a small amount of carbon monoxide, carbon dioxide, nitrogen, oxygen and other unsaturations
Hydro carbons.In addition, also containing hundreds of kinds of materials such as coal tar, organic sulfur, benzene class, phenols, naphthalenes.Oven gas passes through tar separation, taken off
Benzene produces the byproduct such as tar and crude benzol, then carries out original of the washing, purifying desulfurization as other chemical products such as synthesis ammonia, methanol
Expect that gas uses, as shown in figure 1, the preparation of conventional water-gas and the technological process utilized are：Out pass through oven gas from coke-oven plant
The oven gas that separative element 1 separates, and after wet desulphurization, into oven gas gas holder 2, then by the first compression unit 3
(being specially helical-lobe compressor) boosts to 0.2MPa, into pre- desulfurization unit 4, tentatively removes remaining organic sulfur, hydrogen sulfide, remains
Remaining tar, benzene, naphthalene etc.；2.5MPa is boosted to subsequently into the second compression unit 5 (being specially reciprocating compressor), is sent to and adds
Hydrogen desulfurization unit 6, organic sulfur and most unsaturated hydrocarbons are converted into hydrogen sulfide, methane, and remove most hydrogen sulfide,
Then remaining hydrogen sulfide is removed in fine de-sulfur unit 7, the total sulfur for going out desulfurization is not higher than 0.5PPm, containing the more purified gas of methane
Into methane conversion unit 8 (be specially reburner), oxygen and methane reaction are converted into carbon monoxide and hydrogen, then by the
Three compression units 11 are pressurized to 5.5Mpa, send Methanol Plant to produce methanol.If production synthesis ammonia, it is also necessary to by CO converter units
9th, decarburization unit 10, hydrogen remove the 3rd compression unit 11 again, then remove synthesis ammonia plant with nitrogen in proportion, finally, each system
Caused waste water send sewage treatment plant 12 to handle.The safe and environment-friendly, effective of oven gas utilizes an always problem, at present,
Traditional way is to carry out washing, purifying desulfurization again by tar separation, the de- benzene production byproduct such as tar and crude benzol, oven gas
Unstripped gas as other chemical products such as synthesis ammonia, methanol uses.
Following defect be present in traditional technological process：1st, because oven gas composition is sufficiently complex, containing organic sulfur, benzene, anthracene,
A variety of poisonous and harmful substances such as quinone, naphthalene, during the purification use of oven gas, waste water is difficult to handle, waste gas toxicity is big, to soil
Earth, water body, seriously polluted, the improvement difficulty of air, and cost for wastewater treatment is high, investment is big, complex process, technical requirements height；
2nd, the preparation technology flow of water-gas is longer, and investment is larger, and floor space is big, and checking maintenance workload is big；3rd, due in oven gas
Tar, sulphur, benzene, naphthalene equal size are high, and the burn into of equipment and pipeline to system blocks serious and is difficult to administer, and easily reveals
With parking accident, so whole system is relatively inaccessible to macrocyclic stable operation, potential safety hazard is more.Hydrogen content in oven gas
Height, H/C is higher after methane reborner, so causing periodic off-gases amount larger, is burnt up as fuel gas, causes substantial amounts of
Energy dissipation.
Utility model content
The purpose of this utility model is to provide a kind of system for preparing water-gas with oven gas and water-coal-slurry, existing to overcome
The defects of with the presence of technology.
In order to solve the above technical problems, the utility model provides a kind of is with what water-coal-slurry prepared water-gas with oven gas
System, the system include oven gas separative element, gas holder, the first compression unit, pre- desulfurization unit and the second compression unit, institute
The outlet for stating the oven gas of oven gas separative element is connected with the entrance of the gas holder, the outlet of the gas holder and the described first pressure
The air inlet connection of contracting unit, the gas outlet of first compression unit is connected with the air inlet of the pre- desulfurization unit, described
The gas outlet of pre- desulfurization unit is connected with the air inlet of second compression unit, and the system also includes coal water slurry gasification list
Member, water-coal-slurry preparation unit, CO converter units and desulfurization and decarburization unit,
The coal water slurry gasification unit has Multichannel combination burner, prepared by second compression unit, the water-coal-slurry
Unit is connected by pipeline with the multichannel gasifier nozzle；
The oven gas separative element, gas holder, the first compression unit, pre- desulfurization unit and the second compression unit sewage go out
Mouth is connected by pipeline with the water-coal-slurry preparation unit water inlet respectively；
The gas outlet of the coal water slurry gasification unit is connected by pipeline with the CO converter units；
The gas outlet of the CO converter units is connected with the air inlet of the desulfurization and decarburization unit.
In one embodiment of the present utility model, the system for preparing water-gas also includes the 3rd compression unit and synthesis
Ammonia unit, the gas outlet of the desulfurization and decarburization unit are connected with the 3rd compression unit, the 3rd compression unit with it is described
Synthesize the connection of ammonia unit.
In one embodiment of the present utility model, the system for preparing water-gas also includes methanol and ethylene glycol synthesis is single
Member, methanol and the ethylene glycol synthesis unit are connected with the desulfurization and decarburization unit, and the methanol and ethylene glycol synthesis unit can be with
Produce the chemical products such as methanol, ethylene glycol.
It is provided with one embodiment of the present utility model, between the coal water slurry gasification unit and the CO converter units useless
Pot and the aeration tower being connected with the useless pot, the useless pot are connected with the water-gas unit, the outlet of the aeration tower
Mouth is connected with the CO converter units.
The utility model also provides a kind of method for preparing water-gas with oven gas and water-coal-slurry, and methods described includes following
Step：
Oven gas separative element is separated the tar in oven gas, ammonia and crude benzol, and by isolated Jiao
Furnace gas is transported to gas holder storage；
Oven gas in gas holder after the first compression unit, the processing of pre- desulfurization unit, passes through the second compression unit successively
Enter coal water slurry gasification unit into Multichannel combination burner after boosting；
Caused by the oven gas separative element, gas holder, the first compression unit, pre- desulfurization unit and the second compression unit
Sewage enters water-coal-slurry preparation unit by pipeline and prepares water-coal-slurry；
The water-coal-slurry, purity oxygen, oven gas enter the coal water slurry gasification unit by Multichannel combination burner respectively
Carry out redox reaction and obtain unpurifed gas；
The unpurifed gas enters CO converter units, desulfurization and decarburization unit after washing cooling, purification.
In one embodiment of the present utility model, the unpurifed gas first passes through the sensible heat of useless pot recovery unpurifed gas, so
Enter CO converter units after aeration tower washing cooling afterwards.
In one embodiment of the present utility model, the unpurifed gas forms 3.0- after the useless pot processing
10.0MPa saturated vapor.
A kind of system and method for preparing water-gas with oven gas and water-coal-slurry of the present utility model has advantages below：
It is simple that the utility model with oven gas and water-coal-slurry prepares water-gas method technological process, equipment operation elasticity is big,
The advantages of overall investment reduces, and high with the continuous operation ratio of system, and consumption is low, workable, and security is good, avoids existing
Pollution of the field discharge to environment；The pre- desulfurization unit of high methane gas, fine de-sulfur unit, methane reborner unit are eliminated, is avoided
The solid wastes such as pre- desulfurization unit, the pollution problem of fine de-sulfur unit and catalyst are difficult to the problem of recycling；By unit
It is caused to contain the reluctant sewage such as tar, benzene, organic sulfur, water is used as water-coal-slurry processed, both saves sewage disposal
Expense turn avoid pollution environment.
Brief description of the drawings
Fig. 1 is the system composition figure that tradition produces water-gas using oven gas.
Fig. 2 is the system composition figure of the present utility model that water-gas is prepared with oven gas and water-coal-slurry.
Embodiment
Following examples are used to illustrate the utility model, but are not limited to the scope of the utility model.
As shown in Fig. 2 the system that a kind of oven gas of the present utility model prepares water-gas with water-coal-slurry co-gasification, this reality
Include oven gas separative element 1, gas holder 2, the first compression unit with the new system that water-gas is prepared with oven gas and water-coal-slurry
3rd, pre- desulfurization unit 4, the second compression unit 5, coal water slurry gasification unit 6, water-coal-slurry preparation unit 7, CO converter units 8 and de-
Sulphur decarburization unit 9.The outlet of the oven gas of oven gas separative element 1 is connected with the entrance of gas holder 2, the outlet of gas holder 2 with the
The air inlet connection of one compression unit 3, the gas outlet of the first compression unit 3 are connected with the air inlet of pre- desulfurization unit 4, pre- desulfurization
The gas outlet of unit 4 is connected with the air inlet of the second compression unit 5, wherein, the gasification furnace of coal water slurry gasification unit 6 has to be led to more
Road assembled nozzle, the second compression unit 5, water-coal-slurry preparation unit 7 are connected by pipeline with Multichannel combination burner.In gasification furnace
High temperature and high pressure environment under, it is also micro- into the coal slurry, methane, organic sulfur of gasification furnace there occurs violent redox reaction
The benzene of amount, anthracene, quinone, naphthalene etc. and other unsaturated hydrocarbons are all substantially transitioned to CO, CO2, H2、H2S、NH3、CH4Deng simple material, institute
To serve the work of three methanation reburner, hydrodesulfurization tower and gasification furnace devices simultaneously equivalent to coal water slurry gasification unit 6
With.The setting of Multichannel combination burner on gasification furnace so that the annular space that oven gas or high methane gas pass through Multichannel combination burner
Into gasification furnace, in gasification furnace and oxygen, water-coal-slurry that violent redox occurs under conditions of HTHP together is anti-
Should, the simple hydrogen sulfide of generating structure, hydrogen, carbon dioxide, carbon monoxide etc..It is few by containing in the oven gas of preliminary purification
The organic sulfur of amount, tar, benzene class, naphthalene, anthracene, quinone etc., under high-temperature and high-pressure conditions, methane and a small amount of tar, benzene, naphthalene, insatiable hunger
It is CO, H with Transient transformations such as hydro carbons, organic sulfurs2、H2S, avoid pollution of the scene discharge to environment.
Wherein, oven gas separative element 1, gas holder 2, the first compression unit 3, the compression unit 5 of pre- desulfurization unit 4 and second
Outlet of sewer be connected respectively by pipeline with the water inlet of water-coal-slurry preparation unit 7.Water-gas preparation system of the present utility model
The reluctant sewage such as tar, benzene, organic sulfur will be contained caused by unit, water are used as water-coal-slurry preparation unit 7,
Both the investment cost of sewage disposal device had been saved, turn avoid the discharge of waste gas, sewage and solid waste, it is useless so as to reduce
Gas, sewage and solid waste discharge the pollution to environment.
The gas outlet of coal water slurry gasification unit 6 is connected by pipeline with CO converter units 8, the gas outlet of CO converter units 8
It is connected with the air inlet of desulfurization and decarburization unit 9.
The water gas system of the present utility model for preparing also includes the 3rd compression unit 10, synthesis ammonia unit 11, produces methanol
Or ethylene glycol route includes methanol and ethylene glycol synthesis unit 12.The gas outlet of desulfurization and decarburization unit 9 and the 3rd compression unit
10 connections, the 3rd compression unit 10 are connected with synthesis ammonia unit 11.The water-gas come out from desulfurization and decarburization unit 9 can be used as system
The unstripped gas of the chemical products such as standby methanol or ethylene glycol, methanol or second two are prepared for supplying methanol and ethylene glycol synthesis unit 12
The products such as alcohol.Useless pot and the aeration tower being connected with useless pot are provided between coal water slurry gasification unit 6 and CO converter units 8 (in figure
It is not shown), useless pot is connected with water-gas unit 6, and the gas outlet of aeration tower is connected with CO converter units 8.
Oven gas composition is sufficiently complex, mainly by hydrogen, methane, carbon monoxide, carbon dioxide, nitrogen, in addition goes back
Contain hundreds of kinds of materials such as coal tar, unsaturated hydro carbons, organic sulfur, benzene class, phenols, naphthalene.The utility model oven gas and water
The method that coal slurry prepares water-gas comprises the following steps：Tar, ammonia and crude benzol are entered by oven gas separative element 1 first
Row initial gross separation, and the oven gas that preliminary purification is obtained is transported to gas holder 2 and stored；Oven gas in gas holder 2 is successively by the
One compression unit 3, pre- desulfurization unit 4 are handled, the second compression unit, then enter coal water slurry gasification by Multichannel combination burner
Unit 6, meanwhile, water-coal-slurry and the second compression unit 5 prepared by the purity oxygen that is separated from air, water-coal-slurry preparation unit 7
Oven gas together into coal water slurry gasification unit 6 is aoxidized, reduction reaction obtains unpurifed gas；Other high methane gas pass through
Second compression unit 5 enters coal water slurry gasification unit 6.In coal water slurry gasification unit 6, oven gas separative element 1 by tar and
The oven gas of benzene separation, water-coal-slurry caused by water-coal-slurry preparation unit 7 and isolated purity oxygen from air pass through
Multichannel combination burner enters the gasification furnace of coal water slurry gasification unit 6, and violent oxidation, reduction occur under high-temperature and high-pressure conditions
Reaction, generates the unpurifed gas based on hydrogen, carbon monoxide, carbon dioxide, and unpurifed gas enters useless pot and reclaims unpurifed gas
In sensible heat, while produce 3.0-10.0MPa saturated vapor.
Meanwhile oven gas separative element 1, gas holder 2, the first compression unit 3, the compression unit 5 of pre- desulfurization unit 4 and second
Caused sewage enters water-coal-slurry preparation unit 7 by pipeline.
After unpurifed gas enters CO converter units 8, desulfurization and decarburization unit 9 after aeration tower washing cooling, purification again
Water-gas, as synthesis path two, after water-gas compresses further across the 3rd compression unit 10, closed into methanol and ethylene glycol
Methanol, ethylene glycol etc. are generated into unit 12；Or synthesize the products such as ammonia as the deammoniation synthesis unit 11 of route of synthesis one.
The utility model is combined by oven gas or other high methane gas with water-coal-slurry produces water-gas, and oven gas is direct
Using compared to flow is simple, investment is low, production cost is low, easy to operate, security is good, three waste discharge is few, environment-friendly
The features such as.The utility model produces carbon monoxide, hydrogen with oven gas and water-coal-slurry co-gasification, eliminates the purification of oven gas
And conversion procedure, and avoid oven gas purification and the discharge of the waste gas in conversion process, sewage and solid waste.
The utility model prepares water-gas method with oven gas and water-coal-slurry, and operating flexibility is big, there is system continuously to run
The advantages of rate is high, and consumption is low, workable, and security is good；Organic sulfur, tar, benzene class, naphthalene, anthracene, quinone etc. pass through water-coal-slurry gas
The Multichannel combination burner for changing unit is directly entered gasification furnace, and play occurs under conditions of HTHP together for oxygen, coal slurry
Strong redox reaction, the simple hydrogen sulfide of generating structure, hydrogen, carbon dioxide, carbon monoxide etc., avoids live discharge
Pollution to environment；The pre- desulphurization system of high methane gas, fine de-sulfur system, methane reborner system are eliminated, avoids pre- desulfurization
The solid wastes such as system, the pollution problem of fine de-sulfur system and catalyst are difficult to the problem of recycling；The utility model will be each
Containing reluctant sewage such as tar, benzene, organic sulfurs caused by unit, water is used as water-coal-slurry processed, both saves sewage
Processing cost turn avoid pollution environment.
Although above having made detailed description to the utility model with generality explanation and specific embodiment,
On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, the these modifications or improvements on the basis of without departing from the utility model spirit, belonging to the utility model will
Seek the scope of protection.
Claims (4)
1. a kind of system for preparing water-gas with oven gas and water-coal-slurry, the system includes oven gas separative element, gas holder, the
One compression unit, pre- desulfurization unit and the second compression unit, the outlet of the oven gas of the oven gas separative element with it is described
The entrance connection of gas holder, the outlet of the gas holder are connected with the air inlet of first compression unit, first compression unit
Gas outlet be connected with the air inlet of the pre- desulfurization unit, the gas outlet of the pre- desulfurization unit and second compression unit
Air inlet connection, it is characterised in that it is single that the system also includes coal water slurry gasification unit, water-coal-slurry preparation unit, CO conversion
Member and desulfurization and decarburization unit,
The coal water slurry gasification unit has Multichannel combination burner, second compression unit, the water-coal-slurry preparation unit
It is connected by pipeline with the multichannel gasifier nozzle；
The oven gas separative element, gas holder, the first compression unit, pre- desulfurization unit and the second compression unit outlet of sewer point
It is not connected by pipeline with the water-coal-slurry preparation unit water inlet；
The gas outlet of the coal water slurry gasification unit is connected by pipeline with the CO converter units；
The gas outlet of the CO converter units is connected with the air inlet of the desulfurization and decarburization unit.
2. the system according to claim 1 for preparing water-gas with oven gas and water-coal-slurry, it is characterised in that
The system for preparing water-gas also includes the 3rd compression unit and synthesis ammonia unit, the outlet of the desulfurization and decarburization unit
Mouth is connected with the 3rd compression unit, and the 3rd compression unit is connected with the synthesis ammonia unit.
3. the system according to claim 1 for preparing water-gas with oven gas and water-coal-slurry, it is characterised in that
The system for preparing water-gas also includes methanol and ethylene glycol synthesis unit, methanol and the ethylene glycol synthesis unit with
The desulfurization and decarburization unit connection.
4. the system according to claim 1 for preparing water-gas with oven gas and water-coal-slurry, it is characterised in that
Useless pot and the aeration tower being connected with the useless pot are provided between the coal water slurry gasification unit and the CO converter units,
The useless pot is connected with the water-gas unit, and the gas outlet of the aeration tower is connected with the CO converter units.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720512379.3U CN206692604U (en) | 2017-05-09 | 2017-05-09 | A kind of system for preparing water-gas with oven gas and water-coal-slurry |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720512379.3U CN206692604U (en) | 2017-05-09 | 2017-05-09 | A kind of system for preparing water-gas with oven gas and water-coal-slurry |
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| CN206692604U true CN206692604U (en) | 2017-12-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995724A (en) * | 2017-05-09 | 2017-08-01 | 北京清创晋华科技有限公司 | A kind of system and method that water-gas is prepared with oven gas and water-coal-slurry |
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- 2017-05-09 CN CN201720512379.3U patent/CN206692604U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995724A (en) * | 2017-05-09 | 2017-08-01 | 北京清创晋华科技有限公司 | A kind of system and method that water-gas is prepared with oven gas and water-coal-slurry |
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