CN203474725U - Coal tar desulfurization and deodorization device - Google Patents
Coal tar desulfurization and deodorization device Download PDFInfo
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- CN203474725U CN203474725U CN201320498573.2U CN201320498573U CN203474725U CN 203474725 U CN203474725 U CN 203474725U CN 201320498573 U CN201320498573 U CN 201320498573U CN 203474725 U CN203474725 U CN 203474725U
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Abstract
The utility model discloses a coal tar desulfurization and deodorization device. The coal tar desulfurization and deodorization device comprises a pre-washing unit, a fiber liquid membrane desulfurization and deodorization unit, a fixed bed deodorization unit and a tail gas treatment unit which are connected sequentially. The alkaline liquid is extracted from trace hydrogen sulfide and mercaptan in coal tar by utilizing the mode of the serial connection of a fiber liquid membrane reaction device with efficient matrix transfer efficiency and a fixed bed reactor. The coal tar desulfurization and deodorization device disclosed by the utility model has the advantages of high desulfurization and deodorization efficiency, less alkaline consumption, less waste alkaline emission, less tail gas pollution and the like.
Description
Technical field
The utility model belongs to coal chemical technology, relates to a kind of coal tar desulfuration-deodorization device.
Background technology
In Coal Chemical Industry process, coal tar is one of staple product of coking industry, can be divided into coal-tar heavy oil, coal-tar middle oil and coalite tar according to dry distillation of coal temperature difference.Coal tar purposes is very extensive, can be used for extracting many Chemicals and produces the fuel such as gasoline, diesel oil.
In recent years, along with crude oil appreciates and the continuous increase of coal tar output, in major part, coalite tar is used directly as fuel.Because coal tar forms very complexity, the mercaptans content that sulphur content especially has stench feature is high, causes serious environmental pollution, therefore, when it is used as industrial chemicals, must carry out desulfuration-deodorization processing.
For coal tar deodorization, process, mainly contain at present the technology such as hydrogenation technique, alkali washing process and all kinds of deodorizing compositions of interpolation.Wherein coal tar hydrogenating treatment technology deodorising effect is good, but technical process is complicated; Alkali washing process only has certain effect to small molecules mercaptan, thereby deodorization treatment effect is comparatively limited; Add deodorizing composition and easily occur on the one hand the phenomenon of unstable product quality, conventionally cause on the other hand the difficulty aggravation of downstream oil product processing.
Utility model content
The purpose of this utility model is to provide a kind of coal tar desulfuration-deodorization treatment unit, the mode that adopts fiber liquid film mass transfer mode to connect with fixed-bed reactor is carried out the caustic extraction of trace hydrogen sulfide and mercaptan in coal tar, the feature such as have that desulfuration-deodorization efficiency is high, salkali waste discharges less and tail gas pollution is low.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions:
A coal tar desulfuration-deodorization device, comprises pre-washing unit, fiber liquid film desulfuration-deodorization unit, fixed bed deodorization unit and the tail gas treating unit of connecting successively.
The major equipment of described pre-washing unit comprises coal tar/water mixer, pre-washing precipitation tank, washes recycle pump and coal tar surge tank in advance; Described coal tar/water mixer, pre-washing precipitation tank and wash in advance recycle pump and connect successively; Described coal tar surge tank is connected with the top exit of pre-washing precipitation tank.
The major equipment of described fiber liquid film desulfuration-deodorization unit comprises coal tar front pump, coal tar strainer, coal tar/oxidation wind mixing tank A, fiber liquid film conversion unit, alkali cleaning slurry tank, catalyzer injector and the NaOH solution circulating pump of series connection successively; The outlet of described NaOH solution circulating pump is connected with the alkali lye import on fiber liquid film conversion unit top.
The major equipment of described fixed bed deodorization unit comprises activator storage tank, activator mix device, coal tar/oxidation wind mixing tank B, fixed-bed reactor, catch pot and the coal tar Send out pump of connecting successively by pipeline.
The major equipment of described tail gas treating unit is salkali waste flow container.
The coal tar surge tank of described pre-washing unit is connected with the coal tar front pump import of described fiber liquid film desulfuration-deodorization unit; The top exit of the alkali cleaning slurry tank of described fiber liquid film desulfuration-deodorization unit is connected with the activator mix device of described fixed bed deodorization unit by pipeline; The outlet at bottom of the alkali cleaning slurry tank of described fiber liquid film desulfuration-deodorization unit is connected with the salkali waste flow container of described tail gas treating unit by pipeline; The top exit of the catch pot of described fixed bed deodorization unit is connected with the salkali waste flow container of described tail gas treating unit by pipeline; The outlet at bottom of the catch pot of described fixed bed deodorization unit is connected with the coal tar surge tank of described pre-washing unit by pipeline.
The positive beneficial effect that the utility model has:
1. utilize and there is the caustic extraction that mode that the fiber liquid film conversion unit of efficient mass transfer efficiency connects with fixed-bed reactor is carried out trace hydrogen sulfide and mercaptan in coal tar.In fiber liquid film desulfuration-deodorization unit, first coal tar mix with oxidation wind, then in fiber liquid film conversion unit, contact with the alkali lye of injecting catalyst, the most of mercaptan in coal tar is converted into corresponding disulphide, and realize in coal tar all removing of hydrogen sulfide.In fixed bed deodorization unit, under the effect of oxidation wind and activator, in coal tar, remaining mercaptan is oxidized to corresponding disulphide in fixed-bed reactor, and the desulfuration-deodorization that finally completes coal tar is processed, and coal tar desulfuration-deodorization efficiency is high;
2. liquid film mass transfer mode and the large mass transfer surfaces of utilizing fiber liquid film conversion unit, improved caustic extraction efficiency, thereby effectively reduced operating load and the process cost thereof of the fixed-bed reactor of series connection;
3. at coal tar, wash in advance unit, by water elution, remove most of insoluble impurities that may contain in coal tar on the one hand, utilize on the other hand coal tar surge tank, effectively solve the impact that feed throughput and the fluctuation of sulphur content scope bring more greatly, thereby there is good turndown ratio.
4. the waste lye of use device discharge is processed waste gas, remove the materials such as micro-alkali lye, hydro carbons and sour gas that wherein may contain, after reaching exhaust emission standard, height is put emptying, further improves the utilization ratio of alkali lye, and the topsoil of effectively avoiding tail gas to cause.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figure 1, described coal tar desulfuration-deodorization device, comprises pre-washing unit, fiber liquid film desulfuration-deodorization unit, fixed bed deodorization unit and the tail gas treating unit of by pipeline, connecting successively.The major equipment of described pre-washing unit comprises coal tar/water mixer 1, pre-washing precipitation tank 2, washes recycle pump 3 and coal tar surge tank 4 in advance, the major equipment of described fiber liquid film desulfuration-deodorization unit comprises coal tar front pump 5, coal tar strainer 6, coal tar/oxidation wind mixing tank A7, fiber liquid film conversion unit 8, alkali cleaning slurry tank 9, catalyzer injector 10 and NaOH solution circulating pump 11, wherein fiber liquid film conversion unit 8 is connected by flange with alkali cleaning slurry tank 9, this fiber liquid film conversion unit adopts the various conversion units that can realize liquid film mass transfer mode in prior art, can be for example that the patent No. is any one fiber liquid film conversion unit of recording in the Chinese patent of ZL2010 2 0266679.6, the major equipment of described fixed bed deodorization unit comprises activator storage tank 12, activator mix device 13, coal tar/oxidation wind mixing tank B14, fixed-bed reactor 15, catch pot 16 and coal tar Send out pump 17, the major equipment of described tail gas treating unit is salkali waste flow container 18.
The coal tar surge tank 4 of described pre-washing unit is connected with coal tar front pump 5 imports of described fiber liquid film desulfuration-deodorization unit by pipeline; The top exit of the alkali cleaning slurry tank 9 of described fiber liquid film desulfuration-deodorization unit is connected with the activator mix device 13 of described fixed bed deodorization unit by pipeline; The outlet at bottom of the alkali cleaning slurry tank 9 of described fiber liquid film desulfuration-deodorization unit is connected with the salkali waste flow container 18 of described tail gas treating unit by pipeline; The top exit of the catch pot 16 of described fixed bed deodorization unit is connected with the salkali waste flow container 18 of described tail gas treating unit by pipeline; The outlet at bottom of the catch pot 16 of described fixed bed deodorization unit is connected with the coal tar surge tank 4 of described pre-washing unit by pipeline.
The coal tar desulfuration-deodorization concrete steps of using above-mentioned coal tar desulfuration-deodorization device to carry out are as follows:
In pre-washing unit, from the pending coal tar of battery limit (BL) with from the recirculated water of pre-washing recycle pump 3, in coal tar/water mixer 1, mixes, the most of insoluble impurities containing in coal tar is removed in washing water, complete the pre-washing processing of coal tar.Coal tar and water from coal tar/water mixer 1 enter pre-washing precipitation tank 2, utilize gravity settling that coal tar and water are obtained separated, isolated coal tar removes coal tar surge tank 4 from pre-washing precipitation tank 2 top exits, and the washing water that discharge pre-washing precipitation tank 2 bottoms is delivered to coal tar/water mixer 1 through pre-washing recycle pump 3 and recycled.The fresh water that pre-water washing process needs is intermittently inputted by respective lines, and the waste water of discharge is intermittently discharged by corresponding pipeline.
In fiber liquid film desulfuration-deodorization unit, coal tar from coal tar surge tank 4 is delivered to coal tar strainer 6 via coal tar front pump 5, filter out after the trace impurity wherein containing, in coal tar/oxidation wind mixing tank A7, mix with the oxidation wind from battery limit (BL), and contact with the circulation alkali liquor that contains catalyzer from NaOH solution circulating pump 11 in fiber liquid film conversion unit 8, realizing the alkali cleaning of hydrogen sulfide and part mercaptan in coal tar removes, mercaptan is wherein oxidized to corresponding disulphide and enters coal tar, hydrogen sulfide is converted into corresponding sulfide and enters in circulation alkali liquor.Coal tar from fiber liquid film conversion unit 8 obtains separated with alkali lye in alkali cleaning slurry tank 9, isolated coal tar removes the activator mix device 13 of described fixed bed deodorization unit from alkali cleaning slurry tank 9 top exits, the alkali lye that alkali cleaning slurry tank 9 outlet at bottoms are discharged, after the required catalyzer of catalyzer injector adition process at 10 intermittence, is delivered to fiber liquid film conversion unit 8 by NaOH solution circulating pump 11 and is recycled.The required fresh alkali lye of process is intermittently inputted by respective lines, and the waste lye producing intermittently enters the salkali waste flow container 18 of described tail gas treating unit by pipeline.
In fixed bed deodorization unit, coal tar from the activator of activator tank 12 with alkali cleaning slurry tank 9 top exits from described fiber liquid film desulfuration-deodorization unit, in activator mix device 13, mix, and enter fixed-bed reactor 15 by coal tar/oxidation wind mixing tank B14 with after oxidation wind from battery limit (BL) mixes; In fixed-bed reactor 15, in coal tar, remaining mercaptan is converted into corresponding disulphide under the effect of oxidation wind, activator, and the deodorization that completes coal tar is processed.From the coal tar after the desulfuration-deodorization of fixed-bed reactor 15 bottoms, after separated with tail gas in catch pot 16, from tail gas separating tank bottom, discharge, by coal tar Send out pump 17, can be delivered to out-of-bounds, also can be delivered to the coal tar surge tank 4 of described pre-washing unit.
At tail gas treating unit, from the tail gas at catch pot 16 tops, in salkali waste flow container 18, remove take-off equipment after the materials such as micro-alkali lye, hydro carbons and sour gas that wherein may contain.
Claims (2)
1. a coal tar desulfuration-deodorization device, is characterized in that: the pre-washing unit, fiber liquid film desulfuration-deodorization unit, fixed bed deodorization unit and the tail gas treating unit that comprise series connection successively; The major equipment of described pre-washing unit comprises coal tar/water mixer (1), pre-washing precipitation tank (2), washes recycle pump (3) and coal tar surge tank (4) in advance; Described coal tar/water mixer (1), pre-washing precipitation tank (2) and wash in advance recycle pump (3) and connect successively; Described coal tar surge tank (4) inlet end is communicated with the top exit of pre-washing precipitation tank (2); The major equipment of described fiber liquid film desulfuration-deodorization unit comprises successively coal tar front pump (5), coal tar strainer (6), coal tar/oxidation wind mixing tank A(7 of series connection), fiber liquid film conversion unit (8), alkali cleaning slurry tank (9), catalyzer injector (10) and NaOH solution circulating pump (11); The outlet of described NaOH solution circulating pump (11) is connected with the alkali lye import on fiber liquid film conversion unit (8) top; The major equipment of described fixed bed deodorization unit comprises successively activator storage tank (12), activator mix device (13), coal tar/oxidation wind mixing tank B(14 of series connection), fixed-bed reactor (15), catch pot (16) and coal tar Send out pump (17); The major equipment of described tail gas treating unit is salkali waste flow container (18).
2. coal tar desulfuration-deodorization device as claimed in claim 1, is characterized in that: the coal tar surge tank (4) of described pre-washing unit is connected with coal tar front pump (5) import of described fiber liquid film desulfuration-deodorization unit; The top exit of the alkali cleaning slurry tank (9) of described fiber liquid film desulfuration-deodorization unit is connected with the activator mix device (13) of described fixed bed deodorization unit by pipeline; The outlet at bottom of the alkali cleaning slurry tank (9) of described fiber liquid film desulfuration-deodorization unit is connected with the salkali waste flow container (18) of described tail gas treating unit; The top exit of the catch pot (16) of described fixed bed deodorization unit is connected with the salkali waste flow container (18) of described tail gas treating unit; The outlet at bottom of the catch pot (16) of described fixed bed deodorization unit is connected with the coal tar surge tank (4) of described pre-washing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320498573.2U CN203474725U (en) | 2013-08-15 | 2013-08-15 | Coal tar desulfurization and deodorization device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320498573.2U CN203474725U (en) | 2013-08-15 | 2013-08-15 | Coal tar desulfurization and deodorization device |
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| CN203474725U true CN203474725U (en) | 2014-03-12 |
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| CN201320498573.2U Expired - Fee Related CN203474725U (en) | 2013-08-15 | 2013-08-15 | Coal tar desulfurization and deodorization device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110387254A (en) * | 2019-07-08 | 2019-10-29 | 宁波章甫能源科技有限公司 | A kind of coal oil desulfuration-deodorization system and method |
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2013
- 2013-08-15 CN CN201320498573.2U patent/CN203474725U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110387254A (en) * | 2019-07-08 | 2019-10-29 | 宁波章甫能源科技有限公司 | A kind of coal oil desulfuration-deodorization system and method |
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