Layering tank for toluene-containing wastewater generated in preparation of carfentrazone-ethyl

Abstract

The utility model relates to a layering tank for toluene-containing wastewater generated in preparation of carfentrazone-ethyl. The layering tank comprises a tank body, and a plurality of partition plates are arranged in the tank body; a feeding hole is formed in the upper part of one side of the tank body; the bottoms of every two adjacent layered spaces are communicated through a first communicating pipe, and the upper portions of every two adjacent layered spaces are communicated through a second communicating pipe. A discharge port is formed above the side surface of the layered space close to the feed port; a drain pipe is arranged below the side face, away from the feeding port, of the tank, a lower sampling port is formed in the bottom of the side face, away from the feeding port, of the tank, and an upper sampling port is formed above the side, provided with the feeding port, of the tank. The device has the advantages that toluene-containing wastewater generated in the preparation of carfentrazone-ethyl enters the tank body through the feeding hole for standing and layering, when solid precipitates are less, water at the lower layer enters other layering spaces through the first communicating pipe, if the solid precipitates are more, the precipitates are cleaned, and the water enters other layering spaces through the second communicating pipe; the stop valve is prevented from being blocked or even damaged, and normal operation of production is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of carfentrazone production, and particularly to a carfentrazone preparation produced toluene-containing wastewater layered tank. BACKGROUND

[0002] Carfentrazone, also known as carfentrazone-ethyl and carfentrazone-ethyl, is a herbicide belonging to the triazolinone class. In carfentrazone preparation, nitration post-treatment and hydrogenation treatment are carried out. The wastewater produced in the nitration post-treatment and the wastewater produced in the toluene liquid washing after hydrogenation contain toluene. Therefore, the carfentrazone preparation produced toluene-containing wastewater needs to be layered and recovered.

[0003] In the prior art, the layered tank for the carfentrazone preparation produced toluene-containing wastewater is only a large tank body. After the wastewater enters, it is layered by standing. The toluene is in the upper layer, and the lower layer wastewater is directly discharged. However, the wastewater still contains solid waste. When the lower layer wastewater is discharged, the solid waste is easy to block the bottom drainage valve, even damage the drainage valve, which is troublesome to clean and replace, and affects the normal operation of production. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a carfentrazone preparation produced toluene-containing wastewater layered tank, which can solve the problem that in the prior art, the solid waste is easy to block the bottom drainage valve when the lower layer wastewater is discharged after the toluene-containing wastewater is layered, damage the drainage valve, and is troublesome to clean and replace.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a tank body is provided, characterized in that: a plurality of partition plates are arranged in the tank body, and the tank body is divided into a plurality of layered spaces by the plurality of partition plates.

[0006] A feeding port is arranged on the upper side of one side of the tank body, and a feeding pipe is arranged at the feeding port;

[0007] In the plurality of layered spaces, the bottoms of adjacent two layered spaces are connected by a first communication pipe, and the upper sides of adjacent two layered spaces are connected by a second communication pipe. Stop valves are arranged on the first communication pipe and the second communication pipe, respectively.

[0008] An outlet is arranged on the upper side of the side surface of the layered space close to the feeding port, and a discharge pipe is arranged at the outlet to communicate with a containing barrel. The outlet is arranged higher than the second communication pipe.

[0009] A drainage pipe is arranged on the lower side of the side surface of the tank body away from the feeding port, and a lower sampling port is arranged on the bottom of the side surface of the tank body away from the feeding port. The drainage pipe is arranged higher than the lower sampling port. An upper sampling port is arranged on the upper side of the side of the tank body provided with the feeding port, and the upper sampling port is arranged higher than the second communication pipe.

[0010] Furthermore, the top and bottom of the partition plate are welded and fixed to the top and bottom of the tank body, respectively.

[0011] Furthermore, the feed inlet is positioned higher than the second connecting pipe.

[0012] Furthermore, the upper sampling port is 3-5 cm higher than the second connecting tube.

[0013] Furthermore, the upper sampling port is connected to a sampling tube, which extends to the bottom of the tank. A sampling hole is provided below the sampling tube, and the sampling tube is connected to the wastewater pool through a discharge pipe.

[0014] With the above structure, the advantages of this utility model are as follows: The toluene-containing wastewater generated during the preparation of cyclohexane enters the tank through the inlet, where it settles and separates into layers. The upper layer is toluene, and the lower layer is water. The tank has multiple stratified spaces. When there is little solid sediment, the water in the lower layer enters other stratified spaces through the first connecting pipe, while the toluene in the upper layer is discharged through the outlet. Sampling is performed through the lower sampling port. If there is a lot of solid sediment, the first connecting pipe is closed to clean the solid sediment, and sampling is performed simultaneously through the upper sampling port. If it is water, the second connecting pipe is opened, allowing the stratified water to enter other stratified spaces. The stratified water is discharged through the drain pipe. When discharging after stratification, if there is a lot of solid sediment, the first connecting pipe at the bottom can be closed for cleaning, preventing the shut-off valve from being blocked or even damaged, without affecting normal drainage and ensuring normal production operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments can enable those skilled in the art to more fully understand this utility model, but do not limit the present utility model to the scope of the described embodiments.

[0017] like Figure 1 As shown, the specific embodiment adopts the following technical solution: it includes a tank body 1, and a number of partition plates 2 are provided inside the tank body 1. The top and bottom of the partition plates 2 are welded and fixed to the top and bottom of the tank body 1, respectively. The partition plates 2 divide the tank body 1 into multiple layered spaces 3. In this embodiment, there are 2 partition plates 2 and 3 layered spaces 3.

[0018] A feed inlet 4 is provided on the upper side of one side of the tank body 1. A feed pipe is installed at the feed inlet 4, and wastewater containing toluene enters the tank body 1 through the feed inlet 4.

[0019] In the plurality of layered spaces 3, the bottoms of two adjacent layered spaces 3 are communicated by the first communication pipe 5, and the upper parts of two adjacent layered spaces 3 are communicated by the second communication pipe 6. The first communication pipe 5 and the second communication pipe 6 are respectively provided with a stop valve. The feed inlet 4 is arranged higher than the second communication pipe 6. The tank body 1 is provided with a drain pipe 8 below the side away from the feed inlet 4. The first communication pipe 5 and the second communication pipe 6 are used to drain the water in the layered space 3 to the adjacent layered space 3. In this embodiment, the water is drained from the layered space 3 on the right side to the layered space 3 on the left side until it is drained from the drain pipe 8.

[0020] The side above the layered space 3 close to the feed inlet 4 is provided with a discharge outlet 7. The discharge outlet 7 is communicated with a containing barrel through a discharge pipe. The discharge outlet 7 is arranged higher than the second communication pipe 6. The toluene after being layered can be discharged through the discharge outlet 7.

[0021] The bottom of the side of the tank body 1 away from the feed inlet 4 is provided with a lower sampling port 9. The drain pipe 8 is arranged higher than the lower sampling port 9. The sampling from the lower sampling port 9 can determine whether there is more solid deposit at the bottom of the tank body 1. If there is, the solid deposit is cleaned. The tank body 1 is provided with a solid deposit discharge outlet.

[0022] The upper side of the side of the tank body 1 provided with the feed inlet 4 is provided with an upper sampling port 10. The upper sampling port 10 is arranged 3-5 cm higher than the second communication pipe 6. The sampling from the upper sampling port 10 can determine the height of the water layer, so as to determine whether to open the second communication pipe 6 to drain water.

[0023] The upper sampling port 10 is communicated with a sampling pipe. The sampling pipe extends to the lower part of the tank body 1, so as to reduce the operation height of sampling and facilitate sampling. The lower part of the sampling pipe is provided with a sampling hole. The sampling pipe is communicated with a waste water pool through a discharge pipe.

[0024] The above-mentioned stop valve and other components are general standard components or components known by those skilled in the art. Their structures and principles can be known by those skilled in the art through technical manuals or through conventional experimental methods, and will not be described.

[0025] Working principle: the waste water containing toluene produced by the preparation of carfentrazone-ethyl enters the tank body 1 through the feed port 4, and is stratified after standing, the upper layer is toluene, and the lower layer is water, a plurality of stratification spaces 3 are arranged in the tank body 1, when the solid precipitate in the bottom of the tank body 1 is less, the water in the lower layer is made to enter the stratification space 3 on the left from the stratification space 3 on the right through the first communication pipe 5, and the toluene in the upper layer is discharged through the discharge port 7; sampling is carried out through the lower sampling port 9, if the solid precipitate is more, the first communication pipe 5 is closed, the solid precipitate is cleaned, and sampling is carried out through the upper sampling port 10 at the same time, if it is water, the second communication pipe 6 is opened, the stratified water is made to enter other stratification spaces 3 through the second communication pipe 6, and the stratified water is discharged through the drain pipe 8, when the stratified water is discharged, the solid precipitate is more, the first communication pipe 5 at the bottom can be closed for cleaning, the second communication pipe 6 at the top is opened for water discharge, the stop valve is prevented from being blocked or even damaged, the normal water discharge is not affected, the normal operation of production is ensured.

[0026] The basic principle and main characteristics of the utility model and the advantages of the utility model are shown and described above. It should be understood by the person skilled in the art that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification only illustrate the principle of the utility model, under the premise of not departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A stratified tank for toluene-containing wastewater generated during the preparation of cyclohexane, comprising a tank body, characterized in that: The tank is equipped with several partition plates, which divide the tank into multiple layered spaces. A feed inlet is provided on the upper side of one side of the tank, and a feed pipe is installed at the feed inlet; In the plurality of layered spaces, the bottom of two adjacent layered spaces are connected by a first connecting pipe, and the top of two adjacent layered spaces are connected by a second connecting pipe. The first connecting pipe and the second connecting pipe are respectively equipped with shut-off valves. An outlet is provided on the upper side of the layered space near the inlet. The outlet is connected to the container through an outlet pipe and is positioned above the second connecting pipe. A drain pipe is provided on the lower side of the tank body away from the feed inlet, and a lower sampling port is provided on the bottom side of the tank body away from the feed inlet. The drain pipe is set higher than the lower sampling port. An upper sampling port is provided on the side of the tank body where the feed inlet is located. The upper sampling port is set higher than the second connecting pipe.

2. The stratified tank for toluene-containing wastewater generated during the preparation of cyclohexane according to claim 1, characterized in that: The top and bottom of the partition plate are welded and fixed to the top and bottom of the tank body, respectively.

3. The stratified tank for toluene-containing wastewater generated during the preparation of cyclohexane according to claim 1, characterized in that: The feed inlet is positioned above the second connecting pipe.

4. The stratification tank for toluene-containing wastewater generated during the preparation of cyclohexane according to claim 1, characterized in that: The upper sampling port is 3-5 cm higher than the second connecting tube.

5. The stratified tank for toluene-containing wastewater generated during the preparation of cyclohexane according to claim 1, characterized in that: The upper sampling port is connected to a sampling tube, which extends to the bottom of the tank. A sampling hole is provided at the bottom of the sampling tube, and the sampling tube is connected to the wastewater pool through a discharge pipe.

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