CN102636076B - Online asphalt cleaning system and method for coking ammonia distillation waste water cooler - Google Patents
Online asphalt cleaning system and method for coking ammonia distillation waste water cooler Download PDFInfo
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- CN102636076B CN102636076B CN 201210104691 CN201210104691A CN102636076B CN 102636076 B CN102636076 B CN 102636076B CN 201210104691 CN201210104691 CN 201210104691 CN 201210104691 A CN201210104691 A CN 201210104691A CN 102636076 B CN102636076 B CN 102636076B
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Abstract
The invention belongs to the technical field of coke oven gas purification and relates to an online asphalt cleaning system and method for a coking ammonia distillation waste water cooler. According to the method, high-temperature ammonia distillation waste water after ammonia removal in an ammonia distillation tower is used as a medium and a waste water pump is used for supplying power. The method comprises the steps of: cutting off the flow of circulating water in a waste water cooler before performing the cleaning operation; then, directly conveying waste water into a waste water pipeline in front of an ammonia distillation waste water cooler through a bypass pipeline before the waste water pump conveys the ammonia distillation waste water to pass through an ammonia water heat exchanger; then, conveying the waste water into the ammonia distillation waste water cooler through the waste water pipeline wherein tar and asphalt in a cooler flow channel are heated and flushed with the high-temperature waste water so that the tar and asphalt accumulated in the flow channel are softened to flow so as to be washed away by the waste water flowing at a high speed, and the tar and asphalt finally reach a gravity oil removal basin of a sewage treatment system. The method and system disclosed by the invention overcome the incapability of the online cleaning, realize a fast and simple cleaning mode and guarantee the continuous and stable production.
Description
Technical field
The invention belongs to the coke oven gas purification technical field, relate to a kind of system and method for coking distilled ammonia wastewater cooler Hand scarf pitch.
Background technology
Coke oven produces remained ammonia at the coke-oven gas purification process, because remained ammonia contains part tar, when the remained ammonia oil removing, the various defects that often exist due to waste-oil scavenger, can not all remove fine particle tar and oil slick in remained ammonia, cause remained ammonia to carry part tar secretly.And in the remained ammonia processing procedure, usually use tower plate bubble hood formula ammonia still to steam and blow processing remained ammonia, in ammonia still, adopt steam from the bottom up remained ammonia to be steamed and blows, because the high temperature steaming of steam is blown, the light components of tar in remained ammonia is evaporated, the distilled ammonia wastewater of the heavy component stayed after with ammonia still process flows automatically to the ammonia still bottom, after part natural sedimentation, at the bottom of tower, discharge, part is blended in distilled ammonia wastewater, carry and be cooled to 70-80 ℃ through the ammoniacal liquor heat exchanger with waste water pump, be cooled to arrive after 40-45 ℃ again gravity oil-removing pond or the accident pool of sewage disposal system through gaseous effluent cooler.Due to process high temperature distillation in ammonia still, the tar overwhelming majority of carrying secretly in remained ammonia becomes mink cell focus, even become pitch, therefore through gaseous effluent cooler, be cooled to 40-45 ℃, as easy as rolling off a log because cold mink cell focus and the pitch of causing of chance is deposited, accumulate in the passage of gaseous effluent cooler, cause passage to stop up, the chiller treatment ability descends, and heat exchange efficiency descends, the waste water water temperature is higher, affects the normal operation of sewage disposal.More seriously affect the normal conveying of distilled ammonia wastewater, affect the treating capacity of remained ammonia, cause preceding working procedure remained ammonia amount many, impact is produced.
" Chemical cleaning of spiral heat exchanger grease " that Yang Zhi in 2006 waits by force the people to deliver on " the cleaning world " the 22nd volume, mainly wherein that a small amount of light oil for heat exchanger is cleaned, its basic principle be adopt alkaline cleaning agent at normal temperatures heat exchanger cleaned, make in long-pending oil in heat exchanger and alkaline cleaner-OH base occurs to send out and answers, reach the oil removing purpose, scale removal process needs to stop work.
Within 2004, Guo believes loyal " the tar fouling in exchanger of coking plant benzole work segment Chemical cleaning " delivered on " the cleaning world " the 20th volume, wherein adopt basic species to add the aqueous solution of surfactant (SAA) preparation, the method of simultaneously adding organic solvent realizes that the cleaning of heat exchanger, scale removal process need to stop work.
The patent No. is 200710152357.1, patent name is: " cleaning of tower, device for coking process " discloses and utilized crude benzol to spray and clean from tower top, carry out closed cycle with pump as power, and the crude benzol temperature is controlled in 25～40 ℃ of scopes, cyclic process needs to stop work.
Although above several and known manner of cleaning up is all being obtained different effects aspect the tar of coking heat exchange equipment, pitch cleaning, but all there is a shortcoming, be exactly to be all to need the off-line cleaning, need to first be stopped work heat transmission equipment, rear employing pump is that power carries out soak cleaning, and the time is long, according to different chemical substances generally more than 4 hours.
Summary of the invention
Technical problem to be solved by this invention is, overcome the shortcoming of prior art, a kind of system and method for coking distilled ammonia wastewater cooler Hand scarf pitch is provided, the problem that having solved the distilled ammonia wastewater cooler can not Hand scarf tar, pitch stops up, significantly shortened the gaseous effluent cooler cleaning tar asphalt required time of process, realized that cooler stops up the quick cleaning of changing because of tar asphalt, improves the cooling effectiveness of cooler.
The technical scheme that the present invention solves above technical problem is:
The system of coking distilled ammonia wastewater cooler Hand scarf pitch, comprise the distilled ammonia wastewater cooler, the ammoniacal liquor heat exchanger, waste water pump and ammonia still, be connected to the cooling water return pipe on the distilled ammonia wastewater cooler, the recirculated cooling water feed pipe, gaseous effluent cooler outlet pipe and gaseous effluent cooler distilled ammonia wastewater water inlet pipe, the gaseous effluent cooler outlet pipe is connected to sewage gravity oil-removing pond, the recirculated cooling water feed pipe is provided with the gaseous effluent cooler inlet valve, the distilled ammonia wastewater cooler is connected to the ammoniacal liquor heat exchanger by the gaseous effluent cooler distilled ammonia wastewater water inlet pipe that is provided with ammoniacal liquor heat exchanger wastewater effluent valve, the ammoniacal liquor heat exchanger is connected to waste water pump by the ammoniacal liquor heat exchanger wastewater inlet pipe that is provided with ammoniacal liquor heat exchanger influent waste water valve, waste water pump is connected to the high temperature distilled ammonia wastewater outlet of ammonia still by the distilled ammonia wastewater outlet pipe, be connected to bypass pipe between gaseous effluent cooler distilled ammonia wastewater water inlet pipe and ammoniacal liquor heat exchanger wastewater inlet pipe, be connected to ammoniacal liquor heat exchanger waste water bypass pipe valve on bypass pipe, the cooling water return pipe, gaseous effluent cooler outlet pipe and gaseous effluent cooler distilled ammonia wastewater water inlet pipe all are provided with valve.
The method of coking distilled ammonia wastewater cooler Hand scarf pitch, carry out according to the following steps:
(i) close the gaseous effluent cooler inlet valve on the recirculated cooling water feed pipe of distilled ammonia wastewater cooler, stop the circulation of distilled ammonia wastewater cooler recirculated water;
(ii) open ammoniacal liquor heat exchanger waste water bypass pipe valve, close ammoniacal liquor heat exchanger influent waste water valve and ammoniacal liquor heat exchanger wastewater effluent valve, open waste water pump, the high temperature distilled ammonia wastewater that will export out from ammonia still high temperature distilled ammonia wastewater by waste water pump is delivered to bypass pipe, be delivered to gaseous effluent cooler distilled ammonia wastewater water inlet pipe by bypass pipe, directly enter the distilled ammonia wastewater cooler by gaseous effluent cooler distilled ammonia wastewater water inlet pipe, utilize the heating of high temperature distilled ammonia wastewater and wash away the tar in the distilled ammonia wastewater cooler flow path, pitch, make to accumulate the tar in runner, pitch softens and has mobile, thereby taken away by swiftly flowing high temperature distilled ammonia wastewater, finally by the gaseous effluent cooler outlet pipe, be delivered to the sewage gravity oil-removing pond of sewage disposal system, reach the purpose of cleaning tar asphalt.
The technical scheme that the present invention further limits is:
The method of aforesaid coking distilled ammonia wastewater cooler Hand scarf pitch, the high temperature distilled ammonia wastewater temperature that ammonia still (9) high temperature distilled ammonia wastewater exports out is 99～102 ℃.
The invention has the beneficial effects as follows: the present invention has realized the Hand scarf tar asphalt function of gaseous effluent cooler, by adopting medium high temperature distilled ammonia wastewater own as carrier, tar asphalt in cooler is cleared up, cleaning speed is fast, instant effect, time is generally at 10-20min, and the manner of cleaning up such as soak cleaning, steam blowing of comparing other have obvious advantage in time, and tar, pitch elimination efficiency reach more than 50% simultaneously.The present invention is without running cost, save production cost, to service life of extension device, improve heat exchange efficiency and all play an important role, solved in the past simultaneously can not Hand scarf problem, realize quick, easy manner of cleaning up, guaranteed the continous-stable of producing.
The accompanying drawing explanation
Fig. 1 is connection diagram of the present invention.
The specific embodiment
Embodiment 1
The present embodiment provides a kind of system of coking distilled ammonia wastewater cooler Hand scarf pitch, connect as shown in Figure 1, comprise distilled ammonia wastewater cooler 4, ammoniacal liquor heat exchanger 6, waste water pump 11 and ammonia still 9, be connected to cooling water return pipe 1 on distilled ammonia wastewater cooler 4, recirculated cooling water feed pipe 2, gaseous effluent cooler outlet pipe 12 and gaseous effluent cooler distilled ammonia wastewater water inlet pipe 5, gaseous effluent cooler outlet pipe 12 is connected to sewage gravity oil-removing pond 13, recirculated cooling water feed pipe 2 is provided with gaseous effluent cooler inlet valve 3, distilled ammonia wastewater cooler 4 is connected to ammoniacal liquor heat exchanger 6 by the gaseous effluent cooler distilled ammonia wastewater water inlet pipe 5 that is provided with ammoniacal liquor heat exchanger wastewater effluent valve 8, ammoniacal liquor heat exchanger 6 is connected to waste water pump 11 by the ammoniacal liquor heat exchanger wastewater inlet pipe 14 that is provided with ammoniacal liquor heat exchanger influent waste water valve 7, waste water pump 11 is connected to the high temperature distilled ammonia wastewater outlet of ammonia still 9 by distilled ammonia wastewater outlet pipe 15, be connected to bypass pipe 16 between gaseous effluent cooler distilled ammonia wastewater water inlet pipe 5 and ammoniacal liquor heat exchanger wastewater inlet pipe 14, be connected to ammoniacal liquor heat exchanger waste water bypass pipe valve 10 on bypass pipe 16, cooling water return pipe 1, gaseous effluent cooler outlet pipe 12 and gaseous effluent cooler distilled ammonia wastewater water inlet pipe 5 all are provided with valve.
The method of the present embodiment coking distilled ammonia wastewater cooler Hand scarf pitch, carry out according to the following steps:
(i) close the gaseous effluent cooler inlet valve 3 on the recirculated cooling water feed pipe 2 of distilled ammonia wastewater cooler 4, stop the circulation of distilled ammonia wastewater cooler 4 recirculated waters, be unlikely to make the high temperature distilled ammonia wastewater by distilled ammonia wastewater cooler 4 to be cooled;
(ii) open ammoniacal liquor heat exchanger waste water bypass pipe valve 10, close ammoniacal liquor heat exchanger influent waste water valve 7 and ammoniacal liquor heat exchanger wastewater effluent valve 8, open waste water pump 11, the high temperature distilled ammonia wastewater that will export out from ammonia still 9 high temperature distilled ammonia wastewaters by waste water pump 11 is delivered to bypass pipe 16, high temperature distilled ammonia wastewater temperature is 99～102 ℃, be delivered to gaseous effluent cooler distilled ammonia wastewater water inlet pipe 5 by bypass pipe 16, directly enter distilled ammonia wastewater cooler 4 by gaseous effluent cooler distilled ammonia wastewater water inlet pipe 5, utilize the heating of high temperature distilled ammonia wastewater and wash away the tar in distilled ammonia wastewater cooler 4 runners, pitch, make to accumulate the tar in runner, pitch softens and has mobile, thereby taken away by swiftly flowing high temperature distilled ammonia wastewater, finally by gaseous effluent cooler outlet pipe 12, be delivered to the sewage gravity oil-removing pond 13 of sewage disposal system, reach the purpose of cleaning tar asphalt.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (3)
1. the system of coking distilled ammonia wastewater cooler Hand scarf pitch, comprise distilled ammonia wastewater cooler (4), ammoniacal liquor heat exchanger (6), waste water pump (11) and ammonia still (9), it is characterized in that: be connected to cooling water return pipe (1) on described distilled ammonia wastewater cooler (4), recirculated cooling water feed pipe (2), gaseous effluent cooler outlet pipe (12) and gaseous effluent cooler distilled ammonia wastewater water inlet pipe (5), described gaseous effluent cooler outlet pipe (12) is connected to sewage gravity oil-removing pond (13), described recirculated cooling water feed pipe (2) is provided with gaseous effluent cooler inlet valve (3), described distilled ammonia wastewater cooler (4) is connected to ammoniacal liquor heat exchanger (6) by the gaseous effluent cooler distilled ammonia wastewater water inlet pipe (5) that is provided with ammoniacal liquor heat exchanger wastewater effluent valve (8), described ammoniacal liquor heat exchanger (6) is connected to waste water pump (11) by the ammoniacal liquor heat exchanger wastewater inlet pipe (14) that is provided with ammoniacal liquor heat exchanger influent waste water valve (7), described waste water pump (11) is connected to the high temperature distilled ammonia wastewater outlet of ammonia still (9) by distilled ammonia wastewater outlet pipe (15), be connected to bypass pipe (16) between described gaseous effluent cooler distilled ammonia wastewater water inlet pipe (5) and ammoniacal liquor heat exchanger wastewater inlet pipe (14), be connected to ammoniacal liquor heat exchanger waste water bypass pipe valve (10) on described bypass pipe (16), described cooling water return pipe (1), gaseous effluent cooler outlet pipe (12) and gaseous effluent cooler distilled ammonia wastewater water inlet pipe (5) all are provided with valve.
2. for the method for the coking distilled ammonia wastewater cooler Hand scarf pitch of the described system of claim 1, it is characterized in that: carry out according to the following steps:
(i) close the gaseous effluent cooler inlet valve (3) on the recirculated cooling water feed pipe (2) of distilled ammonia wastewater cooler (4), stop the circulation of distilled ammonia wastewater cooler (4) recirculated water;
(ii) open ammoniacal liquor heat exchanger waste water bypass pipe valve (10), close ammoniacal liquor heat exchanger influent waste water valve (7) and ammoniacal liquor heat exchanger wastewater effluent valve (8), open waste water pump (11), the high temperature distilled ammonia wastewater that will export out from ammonia still (9) high temperature distilled ammonia wastewater by waste water pump (11) is delivered to bypass pipe (16), be delivered to gaseous effluent cooler distilled ammonia wastewater water inlet pipe (5) by bypass pipe (16), directly enter distilled ammonia wastewater cooler (4) by gaseous effluent cooler distilled ammonia wastewater water inlet pipe (5), utilize the heating of high temperature distilled ammonia wastewater and wash away the tar in distilled ammonia wastewater cooler (4) runner, pitch, make to accumulate the tar in runner, pitch softens and flows, thereby taken away by swiftly flowing high temperature distilled ammonia wastewater, finally by gaseous effluent cooler outlet pipe (12), be delivered to the sewage gravity oil-removing pond (13) of sewage disposal system, reach the purpose of cleaning tar asphalt.
3. the method for coking distilled ammonia wastewater cooler Hand scarf pitch as claimed in claim 2, it is characterized in that: the high temperature distilled ammonia wastewater temperature that described ammonia still (9) high temperature distilled ammonia wastewater exports out is 99～102 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210104691 CN102636076B (en) | 2012-04-10 | 2012-04-10 | Online asphalt cleaning system and method for coking ammonia distillation waste water cooler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210104691 CN102636076B (en) | 2012-04-10 | 2012-04-10 | Online asphalt cleaning system and method for coking ammonia distillation waste water cooler |
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| CN102636076A CN102636076A (en) | 2012-08-15 |
| CN102636076B true CN102636076B (en) | 2013-07-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103203336B (en) * | 2013-03-26 | 2014-12-31 | 鞍钢股份有限公司 | Device and method for cleaning ammonia distillation system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3432396A (en) * | 1966-07-07 | 1969-03-11 | United States Steel Corp | Method of clearing tar accumulations from a coke-oven collector main |
| CN2533134Y (en) * | 2002-03-07 | 2003-01-29 | 中国石化镇海炼油化工股份有限公司 | Coke cooling water circulation treatment devic for coking |
| CN101157865A (en) * | 2007-09-28 | 2008-04-09 | 江苏沙钢集团有限公司 | Cleaning process for coking process tower and device |
| CN202182673U (en) * | 2011-06-29 | 2012-04-04 | 鞍钢股份有限公司 | Replacement device for condensate of primary cooler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7670462B2 (en) * | 2006-04-13 | 2010-03-02 | Great Southern Independent L.L.C. | System and method for on-line cleaning of black oil heater tubes and delayed coker heater tubes |
-
2012
- 2012-04-10 CN CN 201210104691 patent/CN102636076B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3432396A (en) * | 1966-07-07 | 1969-03-11 | United States Steel Corp | Method of clearing tar accumulations from a coke-oven collector main |
| CN2533134Y (en) * | 2002-03-07 | 2003-01-29 | 中国石化镇海炼油化工股份有限公司 | Coke cooling water circulation treatment devic for coking |
| CN101157865A (en) * | 2007-09-28 | 2008-04-09 | 江苏沙钢集团有限公司 | Cleaning process for coking process tower and device |
| CN202182673U (en) * | 2011-06-29 | 2012-04-04 | 鞍钢股份有限公司 | Replacement device for condensate of primary cooler |
Non-Patent Citations (4)
| Title |
|---|
| 杨智强等.螺旋板式换热器油垢的化学清洗.《清洗世界》.2006,第22卷(第8期),42-43. |
| 焦化厂循环冷却水系统不停车清洗;郭信忠;《清洗世界》;20041231;第20卷(第12期);7-9,13 * |
| 螺旋板式换热器油垢的化学清洗;杨智强等;《清洗世界》;20060831;第22卷(第8期);42-43 * |
| 郭信忠.焦化厂循环冷却水系统不停车清洗.《清洗世界》.2004,第20卷(第12期),7-9，13. |
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