CN101530693B - Method and device for secondarily filtering desulfuration liquid by side stream - Google Patents
Method and device for secondarily filtering desulfuration liquid by side stream Download PDFInfo
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- CN101530693B CN101530693B CN2009100204879A CN200910020487A CN101530693B CN 101530693 B CN101530693 B CN 101530693B CN 2009100204879 A CN2009100204879 A CN 2009100204879A CN 200910020487 A CN200910020487 A CN 200910020487A CN 101530693 B CN101530693 B CN 101530693B
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Abstract
The invention relates to a method and a device for secondarily filtering a doctor solution by side stream, and belongs to the technical field of purification of the doctor solution of synthesis ammonia. The method adopts a doctor solution side-stream filter process, and desulfurizes the doctor solution by a doctor solution side-stream filter system and a filter regeneration system which regenerates the filter system; and the device consists of the doctor solution side-stream filter system and the filter regeneration system. The invention is suitable for tannin extract normal pressure desulfurization systems; and after the doctor solution shunted on a doctor solution main pipeline is desulfurized by the device, suspending sulfur and secondary salt contents in deficient liquid after the desulfurization can be effectively reduced, and phenomenon of tower blockage of a desulfurizing tower is reduced. The method and the device not only improve the desulfurization efficiency of the tannin extract desulfurization systems and prolong the stable operation cycle of the systems, but also reduce the discharge of the doctor solution due to tower cleaning; and the suspending sulfur particles after the desulfurization are not discharged and have no pollution, the phenomenon of the tower blockage of the desulfurizing tower is reduced, and the system is stably operated in a long cycle; and the method and the device realize online operation and online back washing, and optimally configure a back washing solution to prevent the back washing solution polluting the environment.
Description
Technical field
The invention belongs to a kind of method and apparatus of secondarily filtering doctor solution by side stream, belong to synthetic ammonia doctor solution purification techniques field.
Background technology
Desulfurization is the important procedure of synthetic ammonia gas purification, also is that more link is produced in the loaded down with trivial details restriction of technology.Domestic most of little nitrogen fertilizer production enterprise adopts alkaline solution to add the catalyst absorption process to remove H in semiwater gas and the conversion gas
2S.General process route be semiwater gas by gas holder behind aeration tower, static decoking, roots blower and cooling tower, enter desulfurizing tower, in the desulfurizing tower packing layer with the doctor solution counter current contacting, after inorganic sulfur in the gas and part organic sulfur are absorbed by solution, enter separator and clean cooler, enter gas compressor behind the gas process static decoking device after the refrigerated separation, go to the follow-up workshop section of synthetic ammonia through gas compressor.Desulfur pump extracts lean solution from the lean solution groove and enters in the desulfurizing tower, desulfurization rich solution behind the absorbing hydrogen sulphide is sent into the oxidation regeneration groove after the pump pressurization, after injector absorbs air oxidation regeneration, sulphur flotates from regeneration tank with the form of foam, the rich solution that contains sulphur is converted into the not lean solution of sulfur-bearing, lean solution enters the lean solution groove through liquid level regulator, so recycles.
In recent years, because the influence of multiple factors such as coal source anxiety and low-sulfur coal are on the high side, cause sulphur coal to be applied to make semiwater gas rapidly in enterprise, the production scale of adding enterprise is increasing, thereby it is increasing to make desulphurization system remove the amount of hydrogen sulfide in the unit interval.In this case, the desulfurization difficulty is increasing, and the suspension sulfur content raises in the doctor solution, and the secondary salt generation strengthens, and system's desulfuration efficiency descends.
Suspension sulphur is residual in wet oxidation process desulfurization lean solution can't avoid with generation secondary salt, that is to say that it is an objective reality, adopts which kind of desulfurizing agent all can not eliminate from root.More and more higher to environmental protection requirement in recent years, and to the suspension sulphur in the doctor solution and secondary salt treatment measures preferably not, cause suspension sulphur in the desulfurization lean solution and secondary salt because of accumulating severe overweight for a long time.This has not only worsened the lean solution quality, has influenced desulfuration efficiency, and causes desulfurizing tower stifled tower phenomenon often to occur, has to stop and takes off the tower cleaning, has had a strong impact on the ordinary production of enterprise.What mention promptly is said method as 19 pages of the 3rd phase of March in 2000 " little nitrogenous fertilizer " magazines " the desulfurizing tower plugging reason is analyzed and precautionary measures ".
Summary of the invention
At the defective of prior art, the invention provides that a kind of technology is simple, equipment is few, process stabilizing is reliable, operating cost is low, maintenance cost is low, the method and apparatus of pollution-free, secondarily filtering doctor solution by side stream that efficient is high.
A kind of method of secondarily filtering doctor solution by side stream, step is as follows:
1) with desulfur pump with doctor solution suction doctor solution trunk line from the lean solution groove;
2) open the valve that the doctor solution side line pipeline that is connected on the doctor solution trunk line is shunted, the doctor solution of doctor solution side line pipeline shunting 5%～20% flow is admitted to filter and filters;
3) filter clean doctor solution filtrate and be sent back to the lean solution groove through the filtrate pipeline;
When 4) the doctor solution filtrate through filtering that is sent back to the lean solution groove is obviously reduced, filter plant needs regeneration, earlier the doctor solution in the filter is flow back to the lean solution groove through back liquid pipeline, with the valve open that just blows on the air duct, the air that comes from air tank enters filter and just blows through just blowing air duct;
5) just blowing finish after, close the valve that just blows on the air duct, open the valve on the blowback air duct, air enters filter through the blowback air duct and carries out blowback, and filter residue is blown off;
6) after the air blowback is finished, close the valve on the blowback air duct, open the valve on the desalted water pipeline, desalted water enters filter by the desalted water pipeline, the filter residue in the washing and filtering machine;
7) be cleaned the filter residue that gets off and discharge, enter the sulphur foam cell through Residue extraction pipeline from the filter slag-drip opening.
The employed equipment of a kind of said method, constituted by doctor solution side line filtration system and filter regeneration system, wherein doctor solution side line filtration system comprises the lean solution groove, desulfur pump, the doctor solution trunk line, the filtrate pipeline, doctor solution side line pipeline and filter, the filter regeneration system comprises air tank, the positive blowpipe of air road, air blowback pipeline and desalted water pipeline, it is characterized in that the lean solution groove connects the doctor solution trunk line, be connected behind the doctor solution trunk line serial connection desulfur pump and with doctor solution side line pipeline, have valve on the doctor solution lateral line canal, its other end inserts in the filter; Connect back liquid pipeline on the doctor solution lateral line canal, have valve on the back liquid pipeline, its other end feeds the lean solution groove; Air tank in the filter regeneration system connects air positive blowpipe road and air blowback pipeline, and two pipelines have valve, is connected to filter up and down on the side, two ends; Be connected to filtrate pipeline and desalted water pipeline on the filter downside, two pipelines have valve, and the filtrate pipeline other end feeds the lean solution groove; The filter bottom has Residue extraction pipeline.
Present device is applicable to tannin extract desulfurization at normal-pressure system, distributes doctor solution from the doctor solution trunk line and can effectively reduce suspension sulphur and secondary salt content the desulfurization lean solution after this equipment is crossed filtration and desulphurization, reduces the stifled tower phenomenon of desulfurizing tower.Both improve the desulfuration efficiency of tannin extract desulphurization system, prolonged the stable operation cycle of system again, and also reduced because of taking off tower and caused the discharging of doctor solution, avoided the pollution of environment.
The inventive method adopts doctor solution side line filtering technique, and desulfurization suspension sulfur granules does not efflux, and non-environmental-pollution reduces the stifled phenomenon of desulfurizing tower sulphur, and system's long-period stable operation is more than 2 years; This method can effectively be filtered desulfurization lean solution system, realizes on-line operation, online backflushing, and the solution optimization of recoil is provided with, and avoids backwash liquid to cause environmental pollution, realizes effectively filtering.
The present invention have technology simple, optimize rationally, equipment is few, work stable and reliable operation, advantages such as operating cost is low, pollution-free, maintenance cost is low, efficient is high, production capacity is big, operation automation, to producing no any negative effect, can really realize energy-saving and emission-reduction, have good economic benefit, social environment benefit and popularizing application prospect.
Description of drawings
Fig. 1 is a side line filtering technique process chart of the present invention.
Wherein, 1, air tank, 2, just blow air duct, 3, filter, 4, filtrate pipeline, 5, doctor solution trunk line, 6, back liquid pipeline, 7, the lean solution groove, 8, desulfur pump, 9, doctor solution side line pipeline, 10, Residue extraction pipeline, 11, the desalted water pipeline, 12, the blowback air duct.
The specific embodiment
The present invention will be further described below in conjunction with drawings and Examples, but be not limited thereto.
Embodiment 1:(method embodiment)
A kind of method of secondarily filtering doctor solution by side stream, step is as follows:
1) with desulfur pump with doctor solution suction doctor solution trunk line from the lean solution groove;
2) open the valve that the doctor solution side line pipeline that is connected on the doctor solution trunk line is shunted, doctor solution side line pipeline is shunted the doctor solution of about 8% flow, is admitted to filter and filters;
3) filter clean doctor solution filtrate and be sent back to the lean solution groove through the filtrate pipeline;
When 4) the doctor solution filtrate through filtering that is sent back to the lean solution groove is obviously reduced, filter plant needs regeneration, earlier the doctor solution in the filter is flow back to the lean solution groove through back liquid pipeline, with the valve open that just blows on the air duct, the air that comes from air tank enters filter and just blows through just blowing air duct;
5) just blowing finish after, close the valve that just blows on the air duct, open the valve on the blowback air duct, air enters filter through the blowback air duct and carries out blowback, and filter residue is blown off;
6) after the air blowback is finished, close the valve on the blowback air duct, open the valve on the desalted water pipeline, desalted water enters filter by the desalted water pipeline, the filter residue in the washing and filtering machine;
7) be cleaned the filter residue that gets off and discharge, enter the sulphur foam cell through Residue extraction pipeline from the filter slag-drip opening.
Embodiment 2:(method embodiment)
Identical with embodiment 1, just the doctor solution that doctor solution side line pipeline is shunted about 12% flow in the step 2 is admitted to filter and filters.
Embodiment 3:(method embodiment)
Identical with embodiment 1, just the doctor solution that doctor solution side line pipeline is shunted about 18% flow in the step 2 is admitted to filter and filters.
Embodiment 4:(apparatus embodiments)
The structure of the embodiment of the invention 2 as shown in Figure 1, the employed equipment of a kind of said method, constituted by doctor solution side line filtration system and filter regeneration system, wherein doctor solution side line filtration system comprises the lean solution groove, desulfur pump, the doctor solution trunk line, the filtrate pipeline, doctor solution side line pipeline and filter, the filter regeneration system comprises air tank, the positive blowpipe of air road, air blowback pipeline and desalted water pipeline, it is characterized in that the lean solution groove connects the doctor solution trunk line, be connected behind the doctor solution trunk line serial connection desulfur pump and with doctor solution side line pipeline, have valve on the doctor solution lateral line canal, its other end inserts in the filter; Connect back liquid pipeline on the doctor solution lateral line canal, have valve on the back liquid pipeline, its other end feeds the lean solution groove; Air tank in the filter regeneration system connects air positive blowpipe road and air blowback pipeline, and two pipelines have valve, is connected to filter up and down on the side, two ends; Be connected to filtrate pipeline and desalted water pipeline on the filter downside, two pipelines have valve, and the filtrate pipeline other end feeds the lean solution groove; The filter bottom has Residue extraction pipeline.
Claims (2)
1. the method for a secondarily filtering doctor solution by side stream, step is as follows;
1) with desulfur pump with doctor solution suction doctor solution trunk line from the lean solution groove;
2) open the valve that the doctor solution side line pipeline that is connected on the doctor solution trunk line is shunted, the doctor solution of doctor solution side line pipeline shunting 5%～20% flow is admitted to filter and filters;
3) filter clean doctor solution filtrate and be sent back to the lean solution groove through the filtrate pipeline;
When 4) the doctor solution filtrate through filtering that is sent back to the lean solution groove is obviously reduced, filter needs regeneration, earlier the doctor solution in the filter is flow back to the lean solution groove through back liquid pipeline, with the valve open that just blows on the air duct, the air that comes from air tank enters filter and just blows through just blowing air duct;
5) just blowing finish after, close the valve that just blows on the air duct, open the valve on the blowback air duct, air enters filter through the blowback air duct and carries out blowback, and filter residue is blown off;
6) after the air blowback is finished, close the valve on the blowback air duct, open the valve on the desalted water pipeline, desalted water enters filter by the desalted water pipeline, the filter residue in the washing and filtering machine;
7) be cleaned the filter residue that gets off and discharge, enter the sulphur foam cell through Residue extraction pipeline from the filter slag-drip opening.
2. equipment that uses in the method according to claim 1, constituted by doctor solution side line filtration system and filter regeneration system, wherein doctor solution side line filtration system comprises the lean solution groove, desulfur pump, the doctor solution trunk line, the filtrate pipeline, doctor solution side line pipeline and filter, the filter regeneration system comprises air tank, the positive blowpipe of air road, air blowback pipeline and desalted water pipeline, it is characterized in that the lean solution groove connects the doctor solution trunk line, be connected behind the doctor solution trunk line serial connection desulfur pump and with doctor solution side line pipeline, have valve on the doctor solution lateral line canal, its other end inserts in the filter; Connect back liquid pipeline on the doctor solution lateral line canal, have valve on the back liquid pipeline, its other end feeds the lean solution groove; Air tank in the filter regeneration system connects air positive blowpipe road and air blowback pipeline, and two pipelines have valve, is connected to filter up and down on the side, two ends; Be connected to filtrate pipeline and desalted water pipeline on the filter downside, two pipelines have valve, and the filtrate pipeline other end feeds the lean solution groove; The filter bottom has Residue extraction pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100204879A CN101530693B (en) | 2009-04-14 | 2009-04-14 | Method and device for secondarily filtering desulfuration liquid by side stream |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100204879A CN101530693B (en) | 2009-04-14 | 2009-04-14 | Method and device for secondarily filtering desulfuration liquid by side stream |
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| CN101530693A CN101530693A (en) | 2009-09-16 |
| CN101530693B true CN101530693B (en) | 2011-04-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104815553A (en) * | 2015-04-21 | 2015-08-05 | 威海恒邦化工有限公司 | Method for enhancing novel wet purification effects of semi-water gas |
| CN107684770A (en) * | 2017-10-04 | 2018-02-13 | 山东胜星化工有限公司 | One kind backwash poor liquid filter of desulfurization |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0537694A1 (en) * | 1991-10-17 | 1993-04-21 | Chubu Electric Power Company, Incorporated | Process for treating effluent from flue-gas desulfurization system and apparatus thereof |
| EP0763377A1 (en) * | 1995-09-08 | 1997-03-19 | Mitsubishi Jukogyo Kabushiki Kaisha | Flue gas treating system |
| CN1142093C (en) * | 2002-04-23 | 2004-03-17 | 宋志骥 | Process for refining water glass by precise minipore filter |
| CN201099676Y (en) * | 2007-09-28 | 2008-08-13 | 兖矿峄山化工有限公司 | Automatic continuous reclamation device for desulfurization solution |
-
2009
- 2009-04-14 CN CN2009100204879A patent/CN101530693B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0537694A1 (en) * | 1991-10-17 | 1993-04-21 | Chubu Electric Power Company, Incorporated | Process for treating effluent from flue-gas desulfurization system and apparatus thereof |
| EP0763377A1 (en) * | 1995-09-08 | 1997-03-19 | Mitsubishi Jukogyo Kabushiki Kaisha | Flue gas treating system |
| CN1142093C (en) * | 2002-04-23 | 2004-03-17 | 宋志骥 | Process for refining water glass by precise minipore filter |
| CN201099676Y (en) * | 2007-09-28 | 2008-08-13 | 兖矿峄山化工有限公司 | Automatic continuous reclamation device for desulfurization solution |
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Granted publication date: 20110420 Termination date: 20130414 |