CN214360728U

CN214360728U - Coal tar deep-processing process effluent disposal system

Info

Publication number: CN214360728U
Application number: CN202120268050.3U
Authority: CN
Inventors: 孔繁和; 李水平; 苏德琦
Original assignee: Ningxia Xinhuawei Energy Technology Co ltd
Current assignee: Ningxia Xinhuawei Energy Technology Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-10-08
Anticipated expiration: 2031-01-29

Abstract

The utility model provides a coal tar deep-processing process effluent disposal system, waste water treatment technical field, including the former basin that connects gradually, transfer acid tank, catalytic oxidation retort, buffer memory groove and sludge filter press, produced waste water at first is collected in former basin in the coal tar deep-processing process, then is sent to and transfers acid tank, adjusts waste water pH value and is 3 ~ 4. The wastewater with the adjusted pH value is sent into a catalytic oxidation reaction tank, and organic matters, ammonia nitrogen and the like in the wastewater are oxidized and decomposed in the presence of a catalyst and hydrogen peroxide, so that the COD (chemical oxygen demand) and the ammonia nitrogen content of the wastewater are reduced. And (4) sending the wastewater subjected to oxidation treatment to an oil sludge filter press, filtering, separating and removing substances such as oil sludge and the like contained in the wastewater, and discharging the wastewater after reaching the standard. The system has the advantages of simple structure, small occupied area and high treatment efficiency, is suitable for treating the waste water with small amount of high ammonia nitrogen, high oil content and high toxicity generated in the deep processing process of the coal tar, and can greatly reduce the waste water treatment cost.

Description

Coal tar deep-processing process effluent disposal system

Technical Field

The utility model discloses waste water treatment technical field, concretely relates to coal tar deep-processing process effluent disposal system.

Background

The deep processing of coal tar refers to a processing technology for separating and obtaining light oil, anthracene oil, phenol oil, naphthalene, pitch and the like by taking the coal tar as a raw material through physical and chemical processes. In the coal tar production process, especially in the coal tar pretreatment process, a small amount of wastewater with high ammonia nitrogen, high oil content and high toxicity is generated, and the method belongs to industrial wastewater which is difficult to treat.

In the prior art, for example, chinese patent No. 201210133460.2 discloses a method for treating and recycling coal tar processing wastewater, which comprises a combined process of pretreatment, biological treatment and post-treatment, wherein pretreatment equipment comprises an oil separation tank, an air flotation tank and a hydrolysis acidification adjusting tank, and biochemical treatment equipment comprises a shortcut nitrification tank, an anaerobic ammonia oxidation tank and an aerobic biological carbon tank. Although the method for treating and recycling the coal tar processing wastewater can reduce the content of each pollutant in the coal tar wastewater and realize standard discharge, the method has the advantages of complex equipment structure, large floor area and high operating cost, and cannot be applied to treating the coal tar wastewater with small yield.

Disclosure of Invention

In view of this, the utility model provides a coal tar deep-processing process effluent disposal system to solve the coal tar effluent disposal equipment structure that exists among the prior art complicated, area is big, the high technical problem of working costs.

The utility model provides a technical scheme that its technical problem adopted is:

a coal tar deep processing process effluent disposal system includes:

a raw water tank;

the acid adjusting tank is connected with the raw water tank, and a sulfuric acid feeding pipe for adding dilute sulfuric acid into the acid adjusting tank is arranged on the acid adjusting tank; a first feeding pump is arranged at the discharge end of the acid adjusting tank, and a first feeding pipe is arranged at the outlet of the first feeding pump; a hydrogen peroxide feeding pipe is connected to the first feeding pipe;

the feed end of the catalytic oxidation reaction tank is connected with the first feed pipe, and a catalyst packing layer for oxidizing and decomposing organic components in the catalytic wastewater is arranged in the catalytic oxidation reaction tank; a first discharging pump is arranged at the discharging end of the catalytic oxidation reaction tank, and a first discharging pipe is arranged at the outlet end of the first discharging pump;

the feed end of the buffer tank is connected with the first discharge pipe, the discharge end of the buffer tank is provided with a second feed pump, and the discharge end of the second feed pump is provided with a second feed pipe; and

and the feed end of the oil sludge filter press is connected with the second feed pipe, the filtrate discharge end is provided with a second discharge pipe, and the filter residue discharge end is provided with an oil sludge discharge pipe.

Preferably, the wastewater treatment system for the coal tar deep processing process further comprises a feeding heater, wherein the feeding end of the cold medium side of the feeding heater is connected with the first feeding pipe, and the discharging end of the feeding heater is connected with the feeding end of the catalytic oxidation reaction tank.

Preferably, a feeding end of the heat medium side of the feeding heater is connected with the first discharging pipe, and a discharging end of the feeding heater is connected with a feeding end of the buffer tank.

Preferably, the coal tar deep processing process wastewater treatment system further comprises a feeding mixer, wherein the feeding mixer is arranged on the first feeding pipe and is positioned behind the hydrogen peroxide feeding pipe.

Preferably, the second discharge pipe is connected with a dilute alkali liquid feed pipe.

Preferably, the system further comprises a reclaimed water storage tank, and the feeding end of the reclaimed water storage tank is connected with the second discharge pipe.

According to the above technical scheme, the utility model provides a coal tar deep-processing process effluent disposal system, its beneficial effect is: through a raw water tank, an acid adjusting tank, a catalytic oxidation reaction tank and a sludge filter press which are sequentially arranged, wastewater generated in the deep processing process of coal tar is firstly collected in the raw water tank, after a certain amount of wastewater is collected in the raw water tank, the wastewater is sent to the acid adjusting tank, dilute sulfuric acid is added, and the pH value of the wastewater is adjusted to be 3-4. And (3) feeding the wastewater with the adjusted pH value into the catalytic oxidation reaction tank, and oxidizing and decomposing organic matters, ammonia nitrogen and the like in the wastewater in the presence of a catalyst and hydrogen peroxide to reduce COD (chemical oxygen demand) and ammonia nitrogen content of the wastewater. And (4) sending the wastewater subjected to oxidation treatment to the oil sludge filter press, filtering, separating and removing substances such as oil sludge and the like contained in the wastewater, and discharging the wastewater after reaching the standard. Through detection, COD of the discharged wastewater is less than or equal to 700mg/L, the ammonia nitrogen content is 200 mg/L-300 mg/L, peculiar smell and color are almost eliminated, and the wastewater discharge standard can be met. The utility model provides a coal tar deep-processing process effluent disposal system simple structure, area is little, and the treatment effeciency is high, is suitable for the waste water of produced high ammonia nitrogen of a small amount, high oiliness, high toxicity among the processing coal tar deep-processing process, can reduce the waste water treatment cost by a wide margin.

Drawings

FIG. 1 is a schematic flow diagram of the equipment of a wastewater treatment system in the coal tar deep processing process.

In the figure: the system comprises a wastewater treatment system 10 in the coal tar deep processing process, a raw water tank 100, an acid adjusting tank 200, a sulfuric acid feeding pipe 201, a first feeding pump 210, a first feeding pipe 211, a hydrogen peroxide feeding pipe 212, a catalytic oxidation reaction tank 300, a catalyst packing layer 310, a first discharging pump 320, a first discharging pipe 321, a buffer tank 400, a second feeding pump 410, a second feeding pipe 411, an oil sludge filter press 500, a second discharging pipe 501, an oil sludge discharging pipe 502, a dilute alkali liquor feeding pipe 503, a feeding heater 600, a feeding mixer 700 and a reclaimed water storage tank 800.

Detailed Description

The following combines the drawings of the utility model to further elaborate the technical scheme and technical effect of the utility model.

Referring to fig. 1, in one embodiment, a system 10 for treating wastewater from coal tar deep processing comprises: former basin 100, acid adjusting tank 200, catalytic oxidation retort 300, buffer tank 400 and sludge filter press 500, acid adjusting tank 200 is connected former basin 100, be provided with on the acid adjusting tank 200 be used for to add the sulphuric acid inlet pipe 201 of dilute sulphuric acid in the acid adjusting tank 200, the discharge end of acid adjusting tank 200 is provided with first feed pump 210, first feed pump 210's export sets up first feed pipe 211, be connected with hydrogen peroxide solution feed pipe 212 on the first feed pipe 211.

The feed end of the catalytic oxidation reaction tank 300 is connected with the first feed pipe 211, and a catalyst packing layer 310 for catalyzing the oxidative decomposition of organic components in the wastewater is arranged in the tank. The discharge end of the catalytic oxidation reaction tank 300 is provided with a first discharge pump 320, and the outlet end of the first discharge pump 320 is provided with a first discharge pipe 321. The feed end of the buffer tank 400 is connected to the first discharge pipe 321, the discharge end is provided with a second feed pump 410, and the discharge end of the second feed pump 410 is provided with a second feed pipe 411. The feed end of the oil sludge filter press 500 is connected with the second feeding pipe 411, the filtrate discharge end is provided with a second discharge pipe 501, and the filter residue discharge end is provided with an oil sludge discharge pipe 502.

Firstly, waste oil generated in the coal tar deep processing process is collected in the raw water tank 100, after a certain amount of wastewater is collected in the raw water tank 100, the wastewater is sent to the acid adjusting tank 200, dilute sulfuric acid is added, and the pH value of the wastewater is adjusted to 3-4. The wastewater with the adjusted pH value is sent into the catalytic oxidation reaction tank 300, and organic matters, ammonia nitrogen and the like in the wastewater are oxidized and decomposed in the presence of a catalyst and hydrogen peroxide, so that the COD (chemical oxygen demand) and the ammonia nitrogen content of the wastewater are reduced. The wastewater after oxidation treatment firstly enters the buffer tank 400 for buffer storage, then is sent to the oil sludge filter press 500, and is discharged after reaching the standard after substances such as oil sludge and the like contained in the wastewater are removed by filtration and separation. Through detection, COD of the discharged wastewater is less than or equal to 700mg/L, the ammonia nitrogen content is 200 mg/L-300 mg/L, peculiar smell and color are almost eliminated, and the wastewater discharge standard can be met. The utility model provides a coal tar deep-processing process effluent disposal system 10 simple structure, area is little, and the treatment effeciency is high, is suitable for the waste water of produced high ammonia nitrogen of a small amount, high oiliness, high toxicity among the processing coal tar deep-processing process, can reduce the waste water treatment cost by a wide margin.

It is worth to say that the catalyst packing layer 310 is filled with a catalyst, and the catalyst at least comprises two components of Fe and C, so that organic components and ammonia nitrogen are catalytically oxidized by Fe, C and hydrogen peroxide, and the COD and ammonia nitrogen content of the wastewater are reduced.

In a preferred embodiment, the wastewater treatment system 10 for coal tar deep processing further comprises a feeding heater 600, wherein a feeding end of a cold medium side of the feeding heater 600 is connected with the first feeding pipe 211, and a discharging end of the feeding heater is connected with a feeding end of the catalytic oxidation reaction tank 300. The feed of the catalytic oxidation reaction tank 300 is preheated by the feed heater 600, thereby improving the catalytic oxidation efficiency.

Further, a feeding end of the feeding heater 600 on the heat medium side is connected to the first discharging pipe 321, and a discharging end is connected to the feeding end of the buffer tank 400. In the catalytic oxidation reaction tank 300, organic components and ammonia nitrogen are oxidized and decomposed in the presence of hydrogen peroxide and a catalyst, the temperature of the wastewater is raised by the released heat, and the discharged material at a higher temperature of the catalytic oxidation reaction tank 300 is utilized to exchange heat with the fed material at a lower temperature of the catalytic oxidation reaction tank 300, so that part of waste heat is recycled, the wastewater treatment cost is reduced, the water inlet temperature is increased, and the catalytic oxidation efficiency is improved.

Further, the wastewater treatment system 10 for the coal tar deep processing process further comprises a feeding mixer 700, wherein the feeding mixer 700 is arranged on the first feeding pipe 211 and is located behind the hydrogen peroxide feeding pipe 212. The wastewater after acid adjustment and hydrogen peroxide are fully mixed in the feed mixer 700, so that the catalytic oxidation efficiency of the catalytic oxidation reaction tank 300 is further improved, and the qualification rate of effluent is ensured.

Further, a dilute alkali liquor feeding pipe 503 is connected to the second discharging pipe 501 to add dilute alkali liquor into the filtrate, adjust the pH value of the discharged wastewater to 6-9, and ensure that the pH value of the discharged water reaches the standard.

Further, the coal tar deep processing process wastewater treatment system 10 further comprises a reclaimed water storage tank 800, wherein a feed end of the reclaimed water storage tank 800 is connected with the second discharge pipe 501 to temporarily store the treated wastewater, so that the wastewater is discharged after reaching the standard after the wastewater index is qualified.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a coal tar deep-processing process effluent disposal system which characterized in that includes:

a raw water tank;

2. The system of claim 1, further comprising a feed heater, wherein a feed end of the feed heater on the cold medium side is connected to the first feed pipe, and a discharge end of the feed heater is connected to the feed end of the catalytic oxidation reaction tank.

3. The coal tar deep processing wastewater treatment system according to claim 2, wherein a feed end of the thermal medium side of the feed heater is connected with the first discharge pipe, and a discharge end of the feed heater is connected with a feed end of the buffer tank.

4. The system for treating wastewater generated in the coal tar deep processing according to claim 1, further comprising a feed mixer, wherein the feed mixer is disposed on the first feeding pipe and behind the hydrogen peroxide feeding pipe.

5. The system for treating wastewater generated in the coal tar deep processing according to claim 1, wherein a dilute alkali liquid feeding pipe is connected to the second discharging pipe.

6. The coal tar deep processing wastewater treatment system of claim 5, further comprising a reclaimed water storage tank, wherein a feed end of the reclaimed water storage tank is connected with the second discharge pipe.