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CN-116410797-B - Ammonia distillation system

CN116410797BCN 116410797 BCN116410797 BCN 116410797BCN-116410797-B

Abstract

The invention belongs to the technical field of gas purification, and discloses an ammonia distillation system which comprises an ammonia distillation tower, an asphalt filtering unit, an ammonia distillation emptying tank and a reflux unit. The first asphalt filter comprises an asphalt box, a flow guide pipe and a baffle, wherein the flow guide pipe is connected with the ammonia distillation tower, the flow guide pipe comprises an extension section, the extension section is arranged in the asphalt box, the baffle is arranged in the asphalt box and divides the asphalt box into a first space and a second space, the extension section is positioned in the first space, an overflow notch is formed in one end, far away from the outlet end of the extension section, of the baffle along the extension direction of the extension section, of the baffle, the overflow notch is communicated with the first space and the second space, a first outlet is formed in the asphalt box surrounding the second space, the first outlet is not lower than the overflow notch, an ammonia distillation emptying tank is communicated with the first outlet, the backflow unit comprises a slag scraping tank, a tar ammonia water separator, an ammonia water collector and a third filter, which are sequentially connected, and the third filter is connected with the ammonia distillation emptying tank.

Inventors

  • XU HUAN
  • LI SI
  • QIU QIUWEI
  • YE RUSHAN
  • PAN SHAOMING
  • HUANG QIUYAN
  • Huo Xiaoshan
  • LU XIAOFENG
  • Jiang Yaohuang
  • YANG TAO
  • YANG ZHIJUN
  • WANG DAOYUAN
  • LI JINGMIN
  • SUN SHOUDUO
  • LIAO ZHIJUN

Assignees

  • 广东中南钢铁股份有限公司

Dates

Publication Date
20260508
Application Date
20230529

Claims (10)

  1. 1. An ammonia distillation system, comprising: An ammonia still (1) capable of discharging waste liquid; Asphalt filter unit, including first asphalt filter (2), first asphalt filter (2) include pitch case (21), honeycomb duct (22) and baffle (23), honeycomb duct (22) with ammonia still (1) link to each other, honeycomb duct (22) include extension section (222), extension section (222) set up in pitch case (21), from the entry end of extension section (222) to the exit end of extension section (222), extension section (222) follow from one side of pitch case (21) down to pitch case (21) opposite side, baffle (23) set up in pitch case (21) and with pitch case (21) are separated into first space (211) and second space (212), extension section (222) are located first space (211), along the extending direction of extension section (222), one end that keeps away from on baffle (23) the exit end of extension section (222) is equipped with overflow breach (24), first space (211) are equipped with first breach (212) and second space (212), the first outlet (213) is arranged at one side of the asphalt tank (21) far away from the overflow notch (24), and the first outlet (213) is not lower than the overflow notch (24); An ammonia distillation emptying tank (4) communicated with the first outlet (213); The reflux unit comprises a slag scraping groove (51), a tar ammonia water separator (52), an ammonia water collector (53) and a third filter (54) which are sequentially connected, wherein the slag scraping groove (51) is connected with the ammonia evaporation emptying groove (4), the third filter (54) is connected with the ammonia evaporation tower (1), and the third filter (54) is used for filtering oil in the waste liquid.
  2. 2. The ammonia distillation system according to claim 1, further comprising an ammonium sulfate unit comprising an acid Jiao Youcao (61), the acid Jiao Youcao (61) being in communication between the first outlet (213) and the skimming trough (51).
  3. 3. Ammonia distillation system according to claim 2, wherein the pitch filter unit further comprises a second pitch filter (3), the second pitch filter (3) being connected to the first outlet (213), the second pitch filter (3) being provided with a second outlet (311) and a third outlet (312), the ammonia distillation emptying tank (4) being connected to the second outlet (311), the acid Jiao Youcao (61) being connected to the third outlet (312).
  4. 4. An ammonia distillation system according to claim 3, wherein the second asphalt filter (3) comprises an asphalt tank (31) and an asphalt tank (32), the asphalt tank (31) is connected with the first outlet (213), the asphalt tank (31) is provided with the second outlet (311) and the third outlet (312), the lower end of the asphalt tank (31) is provided with a deposition drain (313), and the asphalt tank (32) is connected with the deposition drain (313).
  5. 5. The ammonia distillation system according to claim 4, further comprising a second transfer pump (9), the second transfer pump (9) being in communication between the bitumen tank (31) and the acid Jiao Youcao (61).
  6. 6. Ammonia distillation system according to claim 1, wherein the partition (23) comprises a main body part (231) and a protruding part (232) which are connected, wherein one end of the main body part (231) away from the protruding part (232) is fixed on one side of the asphalt tank (21), one end of the protruding part (232) away from the main body part (231) is fixed on the other side of the asphalt tank (21), the top end of the protruding part (232) is lower than the main body part (231), and the asphalt tank (21), the main body part (231) and the protruding part (232) enclose the overflow notch (24).
  7. 7. Ammonia distillation system according to claim 1, wherein the first asphalt filter (2) further comprises a tank cover (25), the tank cover (25) being sealed and a removable cover being provided on the asphalt tank (21).
  8. 8. Ammonia distillation system according to claim 1, wherein the flow guiding pipe (22) further comprises a connecting section (221), one end of the connecting section (221) is connected with the inlet end of the extending section (222), and the other end of the connecting section penetrates out of the asphalt tank (21) to be connected with the ammonia distillation tower (1).
  9. 9. The ammonia distillation system according to claim 2, wherein the ammonium sulfate unit further comprises a desulfurizer (62), the desulfurizer (62) being connected to the acid tar tank (61), the ammonia distillation system further comprising a phenol-cyanogen wastewater station (7), the phenol-cyanogen wastewater station (7) being connected to the desulfurizer (62).
  10. 10. The ammonia distillation system according to claim 9, further comprising a third transfer pump (10), the third transfer pump (10) being in communication between the desulfurizer (62) and the phenol-cyanogen wastewater station (7).

Description

Ammonia distillation system Technical Field The invention relates to the technical field of gas purification, in particular to an ammonia distillation system. Background In the coking industry, the residual ammonia water mainly refers to the residual ammonia water in a condensing and blowing section, and is mainly a solution of ammonia and redundant water (more than is required for circulation) generated in the coking process. In the prior art, the residual ammonia water separated after the slag scraping groove flows back to the ammonia distillation tower through a filter. Taking a ceramic membrane filter as an example, the ceramic membrane is easy to damage, so that the filter can not effectively filter the oil in the residual ammonia water, the oil enters an ammonia still and is heated by steam, and after the waste liquid is discharged from the bottom of the ammonia still, the oil is condensed to form asphalt, so that a waste liquid channel at the bottom of the ammonia still is blocked. Disclosure of Invention The invention aims to provide an ammonia distillation system, which can prevent asphalt in waste liquid from entering equipment such as an ammonia distillation emptying tank and a waste liquid pipeline to cause equipment and pipeline damage after a filter between a slag scraping tank and an ammonia distillation tower is damaged. To achieve the purpose, the invention adopts the following technical scheme: An ammonia distillation system comprising: An ammonia still capable of discharging waste liquid; The asphalt filtering unit comprises a first asphalt filter, the first asphalt filter comprises an asphalt box, a flow guide pipe and a partition plate, the flow guide pipe is connected with the ammonia distillation tower, the flow guide pipe comprises an extension section, the extension section is arranged in the asphalt box, the extension section extends from an inlet end of the extension section to an outlet end of the extension section, the extension section extends from one side of the asphalt box to the other side of the asphalt box from top to bottom, the partition plate is arranged in the asphalt box and divides the asphalt box into a first space and a second space, the extension section is positioned in the first space, an overflow notch is arranged at one end, far away from the outlet end of the extension section, of the partition plate, the overflow notch is communicated with the first space and the second space, a first outlet is arranged on the asphalt box which encloses the second space, and the first outlet is not lower than the overflow notch; the ammonia distillation emptying groove is communicated with the first outlet; The reflux unit comprises a slag scraping groove, a tar ammonia water separator, an ammonia water collector and a third filter which are sequentially connected, wherein the slag scraping groove is connected with the ammonia evaporation emptying groove, the third filter is connected with the ammonia evaporation tower, and the third filter is used for filtering oil in the waste liquid. Optionally, an ammonium sulfate unit is further included, the ammonium sulfate unit including an acid Jiao Youcao, the acid tar tank being in communication between the first outlet and the slag scraping tank. Optionally, the asphalt filtering unit further comprises a second asphalt filter, the second asphalt filter is connected with the first outlet, a second outlet and a third outlet are formed in the second asphalt filter, the ammonia distillation emptying tank is connected with the second outlet, and the acid Jiao Youcao is connected with the third outlet. Optionally, the second asphalt filter comprises an asphalt tank and an asphalt pool, the asphalt tank is connected with the first outlet, a second outlet and a third outlet are arranged on the asphalt tank, a deposition drain is arranged at the lower end of the asphalt tank, and the asphalt pool is connected with the deposition drain. Optionally, a second transfer pump is further included, the second transfer pump being in communication between the bitumen tank and the acid tar tank. Optionally, the baffle includes continuous main part and protruding portion, the main part keep away from the one end of protruding portion is fixed one side of pitch case, the protruding portion is kept away from the one end of main part is fixed the opposite side of pitch case, the top of protruding portion is less than the main part, pitch case, main part with protruding portion encloses into the overflow breach. Optionally, the first asphalt filter further comprises a tank cover, wherein the tank cover is sealed and a detachable cover is arranged on the asphalt tank. Optionally, the honeycomb duct still includes the linkage segment, the one end of linkage segment with the entry end of extension section links to each other, and the other end wears out outside the pitch case with the ammonia still links to each other. Optionally, the ammonium sulfate unit