阅读说明：本技术 一种脱硫液重金属处理装置 (Heavy metal treatment device for desulfurization solution ) 是由 王�琦 芮振华 任军 冯文平 于 2019-03-19 设计创作，主要内容包括：本发明公开了一种脱硫液重金属处理装置,包括洗净塔,所述洗净塔的底部连通有循环泵,所述洗净塔的顶部通过管道连通有捕雾器,所述捕雾器的排气管连通有饱和器,所述饱和器的上段和下段分别设置有循环室和后室,所述饱和器下段的上部连通有第一母液泵,所述第一母液泵的排液管与饱和器的上段连通。本发明通过洗净塔、循环泵、捕雾器、饱和器、第一母液泵、结晶泵、结晶槽、满流槽和第二母液泵的设置,解决了目前传统的焦化脱硫工艺不能对煤气中的脱硫液彻底清除,而且脱硫液中的大部分重金属物质会导致土壤土质变差,影响人体健康的问题,该脱硫液重金属处理装置,具备可对煤气中的脱硫液和重金属物质进行有效处理的优点。(The invention discloses a desulfurization solution heavy metal treatment device which comprises a cleaning tower, wherein the bottom of the cleaning tower is communicated with a circulating pump, the top of the cleaning tower is communicated with a mist catcher through a pipeline, an exhaust pipe of the mist catcher is communicated with a saturator, the upper section and the lower section of the saturator are respectively provided with a circulating chamber and a rear chamber, the upper part of the lower section of the saturator is communicated with a first mother liquid pump, and a liquid discharge pipe of the first mother liquid pump is communicated with the upper section of the saturator. According to the invention, through the arrangement of the cleaning tower, the circulating pump, the mist catcher, the saturator, the first mother liquid pump, the crystallization tank, the full-flow tank and the second mother liquid pump, the problems that the traditional coking desulfurization process cannot thoroughly remove the desulfurization solution in the coal gas at present, and most heavy metal substances in the desulfurization solution can cause soil quality deterioration and influence human health are solved.)

1. The utility model provides a desulfurization liquid heavy metal treatment device, includes washing tower (1), its characterized in that: the bottom of the washing tower (1) is communicated with a circulating pump (2), the top of the washing tower (1) is communicated with a mist catcher (3) through a pipeline, the exhaust pipe of the mist catcher (3) is communicated with a saturator (4), the upper section and the lower section of the saturator (4) are respectively provided with a circulating chamber and a rear chamber, the upper part of the lower section of the saturator (4) is communicated with a first mother liquor pump (5), a liquid discharge pipe of the first mother liquor pump (5) is communicated with the upper section of the saturator (4), the bottom of the lower section of the saturator (4) is communicated with a crystallization pump (6), a liquid discharge pipe of the crystallization pump (6) is communicated with a crystallization tank (7), the upper section of the saturator (4) is provided with a full-flow port, and the full flow port is communicated with a full flow groove (8), the bottom of the full flow groove (8) is communicated with a second mother liquor pump (9), and a liquid discharge pipe of the second mother liquid pump (9) is communicated with a rear chamber spray head of the saturator (4).

2. The desulfurization solution heavy metal treatment device according to claim 1, characterized in that: the bottom of the cleaning tower (1) is communicated with a gas pipeline of the desulfurizing tower, a spray head is arranged at the top of the cleaning tower (1), and the spray head is communicated with a liquid discharge pipe of the circulating pump (2).

3. The desulfurization solution heavy metal treatment device according to claim 1, characterized in that: and part of circulating liquid absorbed by the cleaning tower (1) is discharged into a desulfurization system, and the temperature of spraying liquid in the cleaning tower (1) is slightly lower than the temperature of coal gas by one to two degrees.

4. The desulfurization solution heavy metal treatment device according to claim 1, characterized in that: the annular chamber at the upper section of the saturator (4) is divided into two strands for carrying out coal gas, the coal gas is continuously sprayed by mother liquor, a cyclone-type deacidification device is arranged inside the saturator (4), and the coal gas received by the cyclone-type deacidification device is the coal gas sprayed by the mother liquor in the rear chamber.

5. The desulfurization solution heavy metal treatment device according to claim 1, characterized in that: an ascending pipe is arranged at the upper section inside the saturator (4), coal gas inside the ascending pipe enters a crude benzene working section, a descending pipe is arranged at the lower section inside the saturator (4), and circulating mother liquor absorbing ammonia is arranged inside the descending pipe.

6. The desulfurization solution heavy metal treatment device according to claim 1, characterized in that: the inside of full-flow groove (8) is provided with the liquid seal groove, and the liquid seal groove communicates with full-flow groove (8).

Technical Field

The invention relates to the technical field of coal gas treatment, in particular to a desulfurization solution heavy metal treatment device.

Background

At present, the traditional coking desulfurization process mainly comprises an alkaline method and an ammonia method, wherein a part of manufacturers adopt a mixing method of the alkaline method and the ammonia method, no matter which process is adopted, heavy metals such as iron, manganese, vanadium, cobalt and the like are contained in desulfurization liquid to different degrees, desulfurized gas after desulfurization is subjected to simple cyclone separation to remove desulfurization liquid carried in the gas, the desulfurized gas enters a saturator to produce ammonium sulfate, but the gas is still carried with a large amount of desulfurization liquid containing suspended sulfur after cyclone separation (a plurality of manufacturers are detached due to frequent blockage of the cyclone separators), most heavy metals in the desulfurization liquid are transferred to ammonium sulfate products, and if the ammonium sulfate is used for land fertilization, soil quality deterioration and heavy metal transfer can be caused, and human health is influenced; if the ammonium sulfate is used as a raw material for processing, the quality of the product can be influenced, so that along with the continuous improvement of the standards of environmental protection and chemical products, the heavy metal content in the ammonium sulfate is urgently required to be reduced, and the green high-quality ammonium sulfate is produced.

Disclosure of Invention

The invention aims to provide a desulfurization solution heavy metal treatment device which has the advantage of effectively treating desulfurization solution and heavy metal substances in coal gas and solves the problems that the conventional coking desulfurization process cannot completely remove the desulfurization solution in the coal gas, and most heavy metal substances in the desulfurization solution cause soil deterioration and influence on human health.

In order to achieve the purpose, the invention provides the following technical scheme: a desulfurization liquid heavy metal treatment device comprises a cleaning tower, wherein the bottom of the cleaning tower is communicated with a circulating pump, the top of the cleaning tower is communicated with a mist catcher through a pipeline, an exhaust pipe of the mist catcher is communicated with a saturator, the upper section and the lower section of the saturator are respectively provided with a circulating chamber and a rear chamber, the upper part of the lower section of the saturator is communicated with a first mother liquid pump, a liquid discharge pipe of the first mother liquid pump is communicated with the upper section of the saturator, the bottom of the lower section of the saturator is communicated with a crystallization pump, a liquid discharge pipe of the crystallization pump is communicated with a crystallization tank, the upper section of the saturator is provided with a full flow port, the full flow port is communicated with a full flow tank, the bottom of the full flow tank is communicated with a second mother liquid pump, and the liquid discharge pipe of the second mother liquid pump is communicated with a rear chamber spray head.

Preferably, the bottom of the cleaning tower is communicated with a gas pipeline of the desulfurization tower, a spray head is arranged at the top of the cleaning tower, and the spray head is communicated with a liquid discharge pipe of the circulating pump.

Preferably, part of the circulating liquid absorbed by the inside of the cleaning tower is discharged into a desulfurization system, and the temperature of the spraying liquid in the cleaning tower is slightly lower than the temperature of the coal gas by one to two degrees.

Preferably, the annular chamber at the upper section of the saturator is divided into two parts for coal gas, the coal gas is continuously sprayed by the mother liquor, a cyclone-type deacidification device is arranged in the saturator, and the coal gas received by the cyclone-type deacidification device is the coal gas sprayed by the mother liquor in the rear chamber.

Preferably, an ascending pipe is arranged at the upper section inside the saturator, the coal gas inside the ascending pipe enters the crude benzene section, a descending pipe is arranged at the lower section inside the saturator, and the circulating mother liquor absorbing ammonia is arranged inside the descending pipe.

Preferably, a liquid seal groove is arranged in the full-flow groove and is communicated with the full-flow groove.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the arrangement of the cleaning tower, the circulating pump, the mist catcher, the saturator, the first mother liquid pump, the crystallization tank, the full flow tank and the second mother liquid pump, the problems that the traditional coking desulfurization process cannot thoroughly remove the desulfurization solution in the coal gas at present, and most heavy metal substances in the desulfurization solution can cause soil deterioration and influence human health are solved.

2. The invention can further remove the liquid droplets carried in the coal gas by arranging the mist catcher, can remove ammonia in the coal gas by spraying the mother liquor in the internal circulating chamber of the saturator, can separate acid mist carried in the coal gas by arranging the cyclone acid remover, can maintain the quality and the liquid level balance of the spray liquid by arranging the circulating pump, ensures the washing effect, and can completely wash the desulfurization liquid in the coal gas as far as possible by arranging the temperature of the spray liquid in the cleaning tower to be slightly lower than the temperature of the coal gas by one to two degrees.

Drawings

FIG. 1 is a process flow diagram of the present invention.

In the figure: 1 washing tower, 2 circulating pumps, 3 mist catcher, 4 saturator, 5 first mother liquor pump, 6 crystallizing pump, 7 crystallizing tank, 8 full flow tank and 9 second mother liquor pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a desulfurization solution heavy metal treatment device comprises a cleaning tower 1, wherein the bottom of the cleaning tower 1 is communicated with a circulating pump 2, the top of the cleaning tower 1 is communicated with a mist catcher 3 through a pipeline, an exhaust pipe of the mist catcher 3 is communicated with a saturator 4, the upper section and the lower section of the saturator 4 are respectively provided with a circulating chamber and a rear chamber, the upper section of the lower section of the saturator 4 is communicated with a first mother liquor pump 5, a liquid discharge pipe of the first mother liquor pump 5 is communicated with the upper section of the saturator 4, the bottom of the lower section of the saturator 4 is communicated with a crystallization pump 6, a liquid discharge pipe of the crystallization pump 6 is communicated with a crystallization tank 7, the upper section of the saturator 4 is provided with a full flow port which is communicated with a full flow groove 8, the bottom of the full flow groove 8 is communicated with a second mother liquor pump 9, the liquid discharge pipe of the second mother liquor pump 9 is communicated with a rear chamber spray head of the saturator 4, the, the top of the cleaning tower 1 is provided with a spray head which is communicated with a liquid discharge pipe of a circulating pump 2, the spray liquid used by the cleaning tower 1 is recycled, a part of fresh liquid is continuously supplemented, meanwhile, a part of circulating liquid which absorbs the desulfurization liquid is discharged into a desulfurization system, a part of circulating liquid which absorbs the desulfurization liquid in the cleaning tower 1 is discharged into the desulfurization system, the temperature of the spray liquid in the cleaning tower 1 is slightly lower than the temperature of coal gas by one to two degrees, a ring chamber at the upper section of a saturator 4 is divided into two sections to carry out coal gas, the coal gas is continuously sprayed by the mother liquid, a cyclone-type acid remover is arranged in the saturator 4, the coal gas which is received by the cyclone-type acid remover is the coal gas which is sprayed by the mother liquid in a rear chamber, an ascending pipe is arranged at the upper section in the saturator 4, the coal gas in the ascending pipe enters a crude benzene working section, a descending pipe is arranged at the lower section in the saturator 4, and the circulating, the inside of the full flow groove 8 is provided with a liquid seal groove which is communicated with the full flow groove 8, a spray head is arranged inside the cleaning tower 1 and is used for discharging spraying liquid, desulfurizing liquid fog drops carried in the coal gas are washed into the spraying liquid, the liquid fog drops carried in the coal gas can be further removed by arranging the mist catcher 3, the mother liquid in the internal circulation chamber of the saturator 4 is sprayed to remove ammonia in the coal gas, the cyclone acid remover is arranged to separate acid fog carried in the coal gas, the circulating pump 2 is arranged to maintain the quality and the liquid level balance of the spraying liquid and ensure the cleaning effect, the temperature of the spraying liquid in the cleaning tower 1 is slightly lower than the temperature of the coal gas by one to two degrees, the desulfurizing liquid in the coal gas can be completely washed as far as possible, and the cleaning tower 1, the circulating pump 2, the mist catcher 3, the saturator 4, the first mother liquid pump 5, Crystallization pump 6, crystallizer 7, overflow groove 8 and second mother liquor pump 9's setting, solved present traditional coking desulfurization technology and can not thoroughly clear away the doctor solution in the coal gas, most heavy metal material in the doctor solution can lead to soil texture to worsen moreover, influences the problem of human health, and this doctor solution heavy metal processing apparatus possesses the advantage that can carry out effective processing to doctor solution and heavy metal material in the coal gas, is worth promoting.

The working process is as follows: the coal gas after the desulfurizing tower is sent to an ammonium sulfate working procedure, the coal gas enters from the bottom of a newly-added cleaning tower 1 and reversely contacts with a spraying liquid sprayed from the top of the tower, desulfurizing liquid fog drops carried in the coal gas are washed into the spraying liquid, the washed coal gas is led out from the top of the tower and enters a mist catcher 3, liquid fog drops carried in the coal gas are further removed and then enter a saturator 4, the coal gas enters an annular chamber in the upper section of the saturator 4 in two strands and is sprayed with a circulating mother liquid, ammonia in the ammonia is absorbed by sulfuric acid in the mother liquid, the coal gas is combined into one strand and enters a rear chamber to be sprayed with the mother liquid for the last time, the coal gas enters a cyclone-type acid remover in the saturator 4 to separate acid mist carried in the coal gas, the coal gas from the saturator 4 enters a crude benzene working section, the mother liquid at the lower section of the upper part of the saturator 4 is continuously pumped out by a first mother liquid pump 5 and is sent to the annular chamber to be sprayed, the crystal nucleus moves upwards through a saturated medium to grow crystals and cause particle classification, slurry at the bottom of the saturator 4 is sent to a crystallization tank 7 by a crystallization pump 6, mother liquor overflowing from a full-flow opening of the saturator 4 flows into a liquid seal tank in a full-flow tank 8, then overflows to the full-flow tank 8 again, and then is sent to a rear chamber of the saturator 4 by a second mother liquor pump 9 to be sprayed.

In summary, the following steps: this doctor solution heavy metal processing apparatus, through the cooperation of washing tower 1, circulating pump 2, mist trap 3, saturator 4, first mother liquor pump 5, crystallizing pump 6, crystallizer 7, overflow tank 8 and second mother liquor pump 9 and using, solved present traditional coking desulfurization technology and can not thoroughly clear away the doctor solution in the coal gas, moreover most heavy metal material in the doctor solution can lead to soil property deterioration, influences the problem of human health.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.