CN104119940A - Acid tar recovery and treatment method - Google Patents
Acid tar recovery and treatment method Download PDFInfo
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- CN104119940A CN104119940A CN201410369676.8A CN201410369676A CN104119940A CN 104119940 A CN104119940 A CN 104119940A CN 201410369676 A CN201410369676 A CN 201410369676A CN 104119940 A CN104119940 A CN 104119940A
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Abstract
The invention discloses an acid tar recovery and treatment method. The method comprises the steps of adding acid tar and ammonia water which are at the weight ratio of (1 to 6) to (1 to 2) into a reactor to obtain a mixed solution; enabling the acid tar and the ammonia water to be subjected to neutral reaction under the condition of 85-90 DEG C; when the pH value of the mixed solution is up to 7-8, introducing the mixed solution to a vertical tar and ammonia water separation device containing a mixture of the tar, the ammonia water and tar residues, mixing the mixture of the tar, the ammonia water and the tar residues with the mixed solution, and separating a mixture composed of the mixture of the tar, the ammonia water and the tar residues as well as the mixed solution. The mixture composed of the mixture of the tar, the ammonia water and the tar residues as well as the mixed solution is separated by the vertical tar and ammonia water separation device, so that the mixture containing the tar and benzene insoluble substances in the mixed solution is located at a lower layer, and a mixture containing the ammonia water and ammonium sulfate in the mixed solution is located at an upper layer.
Description
Technical field
The present invention relates to a kind of recovery and treatment method of acid tar, specifically, relate to a kind of recovery and treatment method of avoiding environment to cause the acid tar of secondary pollution.
Background technology
Produce in the process of sulphur ammonium (ammonium sulfate) at coke-oven gas, because the tar droplet of carrying secretly in coal gas reacts with approximately 3%～5% the free acid containing in ammonium sulfate liquor, can produce a kind of polyblend of complexity, i.e. acid tar.Correlation detection data show, acid tar can comprise the benzene insoluble of the sulphur ammonium of 2.22%～3.82% sulfuric acid, 18%～22% (for example 20%), 0.71%～0.84% ash content, 50%～52% (for example 51%) and 28%～36.5% water by weight percentage.Be entrained in tar in coal gas and contact formed acid tar and the sulphur ammonium crystal grain bonding of carrying secretly in the coal dust and the ammonium sulfate liquor that get off with the sulphuric acid soln spraying, make this acid tar there is certain viscosity.If acid tar is deposited in the obstruction that can cause production system in the system of producing sulphur ammonium for a long time.In addition, acid tar is entrained in ammonium sulfate products, can have a strong impact on the quality of ammonium sulfate products.
In the prior art, generally adopt following method to process acid tar.
First method is carried out coal blending use after acid tar directly can being mixed with coal charge.But the labour intensity of the method is large, the toxicity of acid tar and the acid safety that can greatly affect staff and transportation equipment in transportation.
Second method can directly be carried out burning disposal by acid tar.Although this burning disposal can be destroyed the objectionable constituent in acid tar up hill and dale,, acid tar can cause the sulfuric acid in acid tar at high temperature to decompose directly into stove burning, produces a large amount of SO2, and directly discharge can cause environmental pollution.In addition, owing to directly acid tar being burned, the benzene insoluble in acid tar cannot be recycled, caused the waste of resource.
Summary of the invention
One object of the present invention is the recovery and treatment method of the acid tar of the safety that a kind of staff of raising and equipment are provided.
Another object of the present invention is to provide a kind of recovery and treatment method of avoiding environment to cause the acid tar of secondary pollution.
Join in reactor according to the recovery and treatment method of acid tar of the present invention acid tar and ammoniacal liquor that to comprise the steps: weight ratio be 1:6～1:2, obtain mixing solutions, under the condition of 85 DEG C～90 DEG C, make acid tar and ammoniacal liquor carry out neutralization reaction, in the time that the pH of mixing solutions value reaches 7～8, described mixing solutions is passed into and contains tar, in the vertical tar ammonia tripping device of the mixture of ammoniacal liquor and coke tar refuse, make tar, the mixture of ammoniacal liquor and coke tar refuse mixes with described mixing solutions, and separating tar, the mixture of ammoniacal liquor and coke tar refuse and the mixture of described mixing solutions, wherein, by vertical tar ammonia tripping device to tar, the mixture of ammoniacal liquor and coke tar refuse separates with the mixture of described mixing solutions, make the mixture that comprises the benzene insoluble in tar and mixing solutions be positioned at lower floor, the mixture that comprises the ammonium sulfate in ammoniacal liquor and mixing solutions is positioned at upper strata.
According to embodiments of the invention, described recovery and treatment method also can comprise: in reactor, described mixing solutions is carried out to stir process, to promote neutralization reaction.
According to embodiments of the invention, described recovery and treatment method also can comprise: by steam-heated mode, described mixing solutions is heated.
According to embodiments of the invention, described reactor can comprise housing, be connected for acid tar being introduced to acid tar inlet pipe in housing with housing, be connected for ammoniacal liquor being introduced to ammoniacal liquor inlet pipe in housing with housing, be arranged in vapour pipe in inner walls, be arranged on agitator in housing, be connected with housing for mixing solutions being drawn to the mixing solutions outlet pipe of housing and being arranged on the thermometer in housing.
According to embodiments of the invention, described reactor also can comprise the transferpump being connected with mixing solutions outlet pipe, mixing solutions is transported in vertical tar ammonia tripping device.
According to embodiments of the invention, the mixture of separating tar, ammoniacal liquor and coke tar refuse can comprise with the step of the mixture of described mixing solutions: the mixture of tar, ammoniacal liquor and coke tar refuse is carried out to first separation with the mixture of described mixing solutions by mechanize dreg scraping trough; By first isolated macrobead coke tar refuse input tar slag bucket, and by the first isolated mixture input tar ammonia separator tank that comprises tar, ammoniacal liquor, ammonium sulfate, small-particle coke tar refuse and benzene insoluble; By tar ammonia separator tank, the mixture that comprises tar, ammoniacal liquor, ammonium sulfate, small-particle coke tar refuse and benzene insoluble is left standstill, the top that makes tar ammonia separator tank is the mixture that comprises ammoniacal liquor and ammonium sulfate, and the bottom of tar ammonia separator tank is the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble; The mixture that comprises ammoniacal liquor and ammonium sulfate is expelled to ammoniacal liquor holding tank; Utilize tar pulp pump that the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble of tar ammonia separator tank bottom is extracted out and delivered to the de-slag device of secondary; Take off slag device by secondary the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble is carried out to secondary separation; The scrapper conveyor that small-particle coke tar refuse after secondary separation is taken off to slag device by secondary scrapes, and is expelled to tar slag bucket; The mixture that comprises tar and benzene insoluble after secondary separation is expelled to tar medial launder.
According to the recovery and treatment method of acid tar of the present invention, first acid tar is processed, afterwards the mixing solutions obtaining after processing is mixed with the mixture of tar, ammoniacal liquor and coke tar refuse from coke oven, and separation component wherein, make the benzene insoluble in mixing solutions enter into tar, ammonium sulfate in mixing solutions enters into ammoniacal liquor, thereby has avoided producing the problem of secondary pollutant in the time that acid tar is processed, and has avoided environment.In addition, according to recovery and treatment method of the present invention, by the mixing solutions obtaining after acid tar is processed is delivered directly in vertical tar ammonia tripping device, omit the transportation to mixing solutions, thereby reduce labour intensity, improved the safety of staff and equipment.In addition, the recovery and treatment method of acid tar of the present invention has the advantages such as simple to operate, practical.
Brief description of the drawings
By the description to embodiment of carrying out below in conjunction with accompanying drawing, above-mentioned and/or other object of the present invention and advantage will become apparent, wherein:
Fig. 1 shows the structural representation of the reactor of the recovery and treatment method for carrying out acid tar of the present invention;
Fig. 2 shows the structural representation of the vertical tar ammonia tripping device of the recovery and treatment method for carrying out acid tar of the present invention.
Embodiment
Below will be by describing embodiment with reference to accompanying drawing, to explain the present invention.But the present invention can implement with multiple different form, should not be understood to be confined to the exemplary embodiment in this proposition.Provide these embodiment make of the present invention open will be thoroughly and completely, and scope of the present invention is conveyed to those skilled in the art fully.
Comprise acid tar is carried out to the step of neutralization reaction and the step that mixing solutions is separated according to the recovery and treatment method of acid tar of the present invention.
Specifically, acid tar being carried out in the step of neutralization reaction, first, the acid tar and the ammoniacal liquor that are 1:6～1:2 (for example, 1:5) by weight ratio join in reactor, obtain mixing solutions; Then, under the condition of 85 DEG C～90 DEG C, carry out neutralization reaction.The concentration of the ammoniacal liquor using according to the recovery and treatment method of acid tar of the present invention is 22～25 % by weight.
Can select any suitable reactor, carry out neutralization reaction as long as meeting acid tar and ammoniacal liquor.In one embodiment of the invention, as shown in Figure 1, reactor can comprise housing 1, is connected for acid tar being introduced to acid tar inlet pipe 2 in housing 1 with housing 1, is connected for ammoniacal liquor being introduced to ammoniacal liquor inlet pipe 3 in housing 1 with housing 1, is arranged in vapour pipe 4 on housing 1 inwall, is arranged on agitator 5 in housing 1, is connected with housing 1 for mixing solutions being drawn to the mixing solutions outlet pipe 6 of housing 1 and being arranged on the thermometer 7 in housing 1.In addition, this reactor also can comprise the transferpump (not shown) being connected with mixing solutions outlet pipe 6.
In the time using as shown in Figure 1 reactor, the acid tar that production sulphur ammonium can be produced is passed in housing 1 by acid tar inlet pipe 2, ammoniacal liquor is passed in housing 1 by ammoniacal liquor inlet pipe 3, and ensures that the weight ratio of acid tar and ammoniacal liquor is 1:6～1:2.According to embodiments of the invention, for cost-saving, the ammoniacal liquor using in the present invention can be the ammonia being recovered from coke-oven gas, the strong aqua obtaining after condensation.
Acid tar and the essence of reacting of ammoniacal liquor are sulfuric acid in acid tar and the neutralization reaction of ammoniacal liquor.If the weight ratio of acid tar and ammoniacal liquor is greater than 1:2, can cause the sulfuric acid reaction in acid tar incomplete, affect follow-up recycling; If the weight ratio of acid tar and ammoniacal liquor is less than 1:6, can increase processing cost.The remaining ammoniacal liquor that acid tar reacts obtained mixing solutions with ammoniacal liquor can comprise tar, ammonium sulfate, benzene insoluble and may exist.In this article, the ammonium sulfate of mentioning can refer to ammoniumsulphate soln.
Can heat mixing solutions by steam-heated mode.For example, can in the vapour pipe 4 being arranged on housing 1 inwall, pass into steam, so that mixing solutions is carried out to indirect heating, neutralization reaction be carried out under the condition of 85 DEG C～90 DEG C.Can promote that like this acid tar is dissolved in ammoniacal liquor better, make sulfuric acid and the ammoniacal liquor in acid tar can rapid reaction.
In one embodiment of the invention, in order to make acid tar be dissolved in better in ammoniacal liquor and promote reaction, can carry out stir process to mixing solutions.For example, can stir mixing solutions by the agitator 5 being arranged in housing 1.In addition, the blade of agitator can adopt propeller type blade.
In the time that the pH of the mixing solutions in reactor value reaches 7～8, neutralization reaction finishes or substantially finishes.
The terminal of neutralization reaction of the present invention can be determined by the reaction times.But, because acid tar is dissolved in the uncertainty of the dissolution rate of ammoniacal liquor, therefore, be difficult for directly determining by the reaction times terminal of neutralization reaction.And the present invention determines the terminal of neutralization reaction by the pH value of the mixing solutions of mensuration neutralization reaction, can control more accurately neutralization reaction, that is, in the time that the pH of mixing solutions value reaches 7～8, neutralization reaction finishes or substantially finishes.
For mixing solutions is separated, mixing solutions is passed in the vertical tar ammonia tripping device of the mixture (this mixture is from coke oven) that contains tar, ammoniacal liquor and coke tar refuse, the mixture of tar, ammoniacal liquor and coke tar refuse is mixed with described mixing solutions, and separate component wherein.Preferably, can mixing solutions be delivered to vertical tar ammonia tripping device by the transferpump (not shown) being connected with mixing solutions outlet pipe 6.Adopt the transportation that can omit in this way the mixing solutions obtaining after acid tar is processed, thereby reduced labour intensity, improved the safety of staff and equipment.
As shown in Figure 2, the vertical tar ammonia tripping device using in the present invention can comprise: mechanize dreg scraping trough 100, receive mixing solutions and from the mixture of tar, ammoniacal liquor and the coke tar refuse of coke oven and the two is mixed to obtain mixture, this mixture separated for the first time; Tar ammonia separator tank 200, receives the first isolated mixture that comprises tar, ammoniacal liquor, ammonium sulfate, small-particle coke tar refuse and benzene insoluble; Tar pulp pump 600, extracts the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble of tar ammonia separator tank 200 bottoms out; Secondary takes off slag device 300, receive the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble of extracting out from tar ammonia separator tank 200 bottoms by tar pulp pump 600, and the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble is carried out to secondary separation, in the de-slag device 300 of secondary, be provided with the scrapper conveyor for small-particle coke tar refuse is scraped; Tar slag bucket 500, receives from the first isolated macrobead coke tar refuse of mechanize dreg scraping trough 100 with by secondary and takes off the small-particle coke tar refuse that the scrapper conveyor of slag device 300 scrapes; Tar medial launder 400, receives the mixture that comprises tar and benzene insoluble of discharging from the de-slag device 300 of secondary; Ammoniacal liquor holding tank 700, receives the mixture that comprises ammoniacal liquor and ammonium sulfate overflowing from the top of tar ammonia separator tank 200.Wherein, mechanize dreg scraping trough 100 is connected with tar ammonia separator tank 200 by pipeline; Tar ammonia separator tank 200 is connected by the de-slag device 300 of tar pulp pump 600 and secondary.
In at least one in the de-slag device 300 of mechanize dreg scraping trough 100, tar ammonia separator tank 200 and secondary, can leave standstill material wherein, to reach at least in part the object of separation.
In the time using vertical tar ammonia tripping device to separate with the mixture of the mixture of tar, ammoniacal liquor and coke tar refuse from coke oven mixing solutions, can carry out according to following step: mixing solutions is separated by mechanize dreg scraping trough 100 for the first time with the mixture of the mixture of tar, ammoniacal liquor and coke tar refuse from coke oven; By first isolated macrobead coke tar refuse input tar slag bucket 500, and by the first isolated mixture input tar ammonia separator tank 200 that comprises tar, ammoniacal liquor, ammonium sulfate, small-particle coke tar refuse and benzene insoluble; By tar ammonia separator tank 200, the mixture that comprises tar, ammoniacal liquor, ammonium sulfate, small-particle coke tar refuse and benzene insoluble is left standstill, the top that makes tar ammonia separator tank 200 is the mixture that comprises ammoniacal liquor and ammonium sulfate, and the bottom of tar ammonia separator tank 200 is the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble; The mixture that comprises ammoniacal liquor and ammonium sulfate is expelled to ammoniacal liquor holding tank 700; Utilize tar pulp pump 600 that the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble of tar ammonia separator tank 200 bottoms is extracted out and delivered to the de-slag device 300 of secondary; Take off slag device 300 by secondary the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble is carried out to secondary separation; The scrapper conveyor that small-particle coke tar refuse after secondary separation is taken off to slag device 300 by secondary scrapes, and is expelled to tar slag bucket 500; The mixture that comprises tar and benzene insoluble after secondary separation is expelled to tar medial launder 400.
The present invention separates with the mixture of the mixture of tar, ammoniacal liquor and coke tar refuse from coke oven mixing solutions by vertical tar ammonia tripping device, make the mixture that comprises tar and benzene insoluble be positioned at lower floor, the mixture that comprises ammoniacal liquor and ammonium sulfate is positioned at upper strata, thereby reaches the recovery to acid tar.According to the recovery and treatment method of acid tar of the present invention, first acid tar is processed, afterwards the mixing solutions obtaining after processing is mixed with the mixture of tar, ammoniacal liquor and coke tar refuse from coke oven, and separation component wherein, make the benzene insoluble in mixing solutions enter into tar, ammonium sulfate in mixing solutions enters into ammoniacal liquor, thereby has avoided producing the problem of secondary pollutant in the time that acid tar is processed, and has avoided environment.
In addition, according to recovery and treatment method of the present invention, by the mixing solutions obtaining after acid tar is processed is delivered directly in vertical tar ammonia tripping device, omit the transportation to mixing solutions, thereby reduce labour intensity, improved the safety of staff and equipment.
In addition, the recovery and treatment method of acid tar of the present invention has the advantages such as simple to operate, practical.
More than describe the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant and combination to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Claims (6)
1. a recovery and treatment method for acid tar, is characterized in that described recovery and treatment method comprises the steps:
The acid tar that is 1:6～1:2 by weight ratio and ammoniacal liquor join in reactor, obtain mixing solutions;
Under the condition of 85 DEG C～90 DEG C, make acid tar and ammoniacal liquor carry out neutralization reaction;
In the time that the pH of mixing solutions value reaches 7～8, described mixing solutions is passed in the vertical tar ammonia tripping device of the mixture that contains tar, ammoniacal liquor and coke tar refuse, the mixture of tar, ammoniacal liquor and coke tar refuse is mixed with described mixing solutions, and the mixture of separating tar, ammoniacal liquor and coke tar refuse and the mixture of described mixing solutions
Wherein, by vertical tar ammonia tripping device, the mixture of tar, ammoniacal liquor and coke tar refuse is separated with the mixture of described mixing solutions, make the mixture that comprises the benzene insoluble in tar and mixing solutions be positioned at lower floor, the mixture that comprises the ammonium sulfate in ammoniacal liquor and mixing solutions is positioned at upper strata.
2. recovery and treatment method according to claim 1, is characterized in that, described recovery and treatment method also comprises: in reactor, described mixing solutions is carried out to stir process, to promote neutralization reaction.
3. recovery and treatment method according to claim 1, is characterized in that, described recovery and treatment method also comprises: by steam-heated mode, described mixing solutions is heated.
4. recovery and treatment method according to claim 1, it is characterized in that, described reactor comprises housing, be connected for acid tar being introduced to acid tar inlet pipe in housing with housing, be connected for ammoniacal liquor being introduced to ammoniacal liquor inlet pipe in housing with housing, be arranged in vapour pipe in inner walls, be arranged on agitator in housing, be connected with housing for mixing solutions being drawn to the mixing solutions outlet pipe of housing and being arranged on the thermometer in housing.
5. recovery and treatment method according to claim 4, is characterized in that, described reactor also comprises the transferpump being connected with mixing solutions outlet pipe, mixing solutions is transported in vertical tar ammonia tripping device.
6. recovery and treatment method according to claim 1, is characterized in that, the step of the mixture of separating tar, ammoniacal liquor and coke tar refuse and the mixture of described mixing solutions comprises:
The mixture of tar, ammoniacal liquor and coke tar refuse is carried out to first separation with the mixture of described mixing solutions by mechanize dreg scraping trough;
By first isolated macrobead coke tar refuse input tar slag bucket, and by the first isolated mixture input tar ammonia separator tank that comprises tar, ammoniacal liquor, ammonium sulfate, small-particle coke tar refuse and benzene insoluble;
By tar ammonia separator tank, the mixture that comprises tar, ammoniacal liquor, ammonium sulfate, small-particle coke tar refuse and benzene insoluble is left standstill, the top that makes tar ammonia separator tank is the mixture that comprises ammoniacal liquor and ammonium sulfate, and the bottom of tar ammonia separator tank is the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble;
The mixture that comprises ammoniacal liquor and ammonium sulfate is expelled to ammoniacal liquor holding tank;
Utilize tar pulp pump that the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble of tar ammonia separator tank bottom is extracted out and delivered to the de-slag device of secondary;
Take off slag device by secondary the mixture that comprises small-particle coke tar refuse, tar and benzene insoluble is carried out to secondary separation;
The scrapper conveyor that small-particle coke tar refuse after secondary separation is taken off to slag device by secondary scrapes, and is expelled to tar slag bucket;
The mixture that comprises tar and benzene insoluble after secondary separation is expelled to tar medial launder.
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| CN201410369676.8A CN104119940A (en) | 2014-07-30 | 2014-07-30 | Acid tar recovery and treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410369676.8A CN104119940A (en) | 2014-07-30 | 2014-07-30 | Acid tar recovery and treatment method |
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| CN104119940A true CN104119940A (en) | 2014-10-29 |
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| CN201410369676.8A Pending CN104119940A (en) | 2014-07-30 | 2014-07-30 | Acid tar recovery and treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113652255A (en) * | 2021-08-23 | 2021-11-16 | 内江市博威能源有限公司 | Medicament feeding device for coal tar recovery and use method thereof |
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2014
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Patent Citations (4)
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| GB552277A (en) * | 1941-12-24 | 1943-03-30 | David Vincent Hollingworth | Improvements relating to the treatment of waste acid tar obtained from the refining of benzol, petroleum spirit and other hydrocarbons |
| CN1472279A (en) * | 2002-08-01 | 2004-02-04 | 四川省达州钢铁集团有限责任公司 | Acid tar oil treating method |
| CN102154022A (en) * | 2011-03-11 | 2011-08-17 | 南京钢铁股份有限公司 | Process and device for recycling coked ammonium sulfate acid tar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113652255A (en) * | 2021-08-23 | 2021-11-16 | 内江市博威能源有限公司 | Medicament feeding device for coal tar recovery and use method thereof |
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Application publication date: 20141029 |