Acetochlor high-salt wastewater treatment system
By designing acetochlor high-salt wastewater treatment system, and separating acetochlor is separated by an extractor and separation module, the problem of acetochlor residue in waste brine after washing is solved, and effective recovery of acetochlor and repetition of petroleum ether is achieved. Utilize, reduce waste and water treatment pressure.
Patent Information
- Application Number
- CN202421241331.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-31
AI Technical Summary
During the production of acetochloride, about 5% of acetochlor remains in the washed waste brine, resulting in acetochlor waste and increasing the pressure for subsequent water treatment.
A high-salt wastewater treatment system for acetamine is designed. The extraction machine and separation module are used to vaporize the petroleum ether in the mixed liquid of petroleum ether and acetamine, so that acetamine is separated from the petroleum ether, and the condenser is used to evaporate the petroleum ether. They are collected separately.
Effective extraction of acetochlor avoids the residue of acetochlor in high-salt wastewater, reduces the waste of acetochlor, and reduces the pressure of subsequent water treatment, while achieving the reuse of petroleum ether.
Smart Images
Figure CN222476389U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of acetochlor production, in particular to an acetochlor high-salt wastewater treatment system. Background Art
[0002] In modern agriculture, the use of herbicides has become one of the important means to increase crop yields and reduce labor input. Among them, acetochlor, as an efficient and highly selective herbicide, has been favored by farmers due to its unique weeding mechanism and wide applicability.
[0003] In the production process of acetochlor, a water washing method is usually required to remove impurities and by-products in the mixture produced by the acetochlor synthesis reaction to ensure the purity and quality of the final product. However, after the mixture is washed with water, waste brine is produced. Since acetochlor is soluble, about 5% of acetochlor remains in the waste brine, resulting in a waste of acetochlor. In addition, the waste brine containing acetochlor will also bring great pressure to the subsequent water treatment workshop when it is processed. Utility Model Content
[0004] The utility model provides an acetochlor high-salt wastewater treatment system to solve the technical problems in the prior art that waste brine after acetochlor washing contains acetochlor, resulting in acetochlor waste and high subsequent water treatment pressure.
[0005] In order to solve the above problems, the acetochlor high-salt wastewater treatment system provided by the utility model adopts the following technical solutions:
[0006] An acetochlor high-salt wastewater treatment system, comprising:
[0007] Acetochlor wastewater tank, which is used to store high-salt wastewater generated after acetochlor washing;
[0008] Petroleum ether tank, which is used to store petroleum ether;
[0009] An extraction module, comprising an extractor connected to the acetochlor wastewater tank and the petroleum ether tank, the extractor being used to extract acetochlor from the acetochlor wastewater, and the ammonium chloride water obtained by the extraction is fed into an ammonium chloride water tank;
[0010] A primary separation module, comprising a rising film evaporator connected to the extractor and a falling film evaporator connected to the rising film evaporator, for vaporizing petroleum ether to separate petroleum ether from acetochlor;
[0011] A secondary separation module, comprising a gas-liquid separator connected to the falling film evaporator, and a petroleum ether condenser and an acetochlor condenser connected to the gas-liquid separator, wherein the drain port of the petroleum ether condenser is connected to the petroleum ether tank;
[0012] An acetochlor tank is connected to the drain port of the acetochlor condenser and is used for collecting and storing acetochlor.
[0013] The beneficial effects of the sethoxydim high-salinity wastewater treatment system provided by the utility model are as follows: by passing the sethoxydim wastewater tank and the petroleum ether tank into the extractor, the sethoxydim in the sethoxydim wastewater can be extracted by the petroleum ether, which can avoid the waste of sethoxydim caused by the sethoxydim in the high-salinity wastewater and reduce the pressure of subsequent water treatment; by setting a primary separation module including a rising film evaporator and a falling film evaporator, the petroleum ether in the mixed liquid of petroleum ether and sethoxydim can be vaporized to separate the sethoxydim from the petroleum ether; by setting a secondary separation module, the gaseous petroleum ether can be separated from the liquid sethoxydim, and the gaseous petroleum ether can be respectively sent to the petroleum ether condenser and the sethoxydim condenser for condensation to obtain liquid petroleum ether and sethoxydim, and the liquid petroleum ether can be used again in the extraction of sethoxydim, thereby realizing the reuse of the petroleum ether.
[0014] Through the above-mentioned arrangement, the utility model can extract acetochlor from acetochlor high-salt wastewater, and the petroleum ether used for extraction can be recovered and reused, which effectively solves the technical problem in the prior art that the waste brine after washing with acetochlor contains acetochlor, resulting in acetochlor waste and high pressure in subsequent water treatment.
[0015] Furthermore, there are two extractors, namely a primary extractor and a secondary extractor, the acetochlor wastewater tank and the rising film evaporator are connected to the secondary extractor, and the petroleum ether tank is connected to the primary extractor by countercurrent extraction.
[0016] Furthermore, a filter is provided between the acetochlor wastewater tank and the secondary extractor to filter out impurity particles in the acetochlor wastewater.
[0017] Furthermore, an automatic regulating valve and a flow meter are provided between the filter and the secondary extraction machine.
[0018] Furthermore, an automatic regulating valve and a flow meter are provided between the petroleum ether tank and the primary extractor.
[0019] Furthermore, a delivery pump is provided between the secondary extraction machine and the rising film evaporator for delivering the mixed liquid of petroleum ether and acetochlor in the secondary extraction machine to the rising film evaporator.
[0020] Furthermore, the rising film evaporator and the falling film evaporator are both connected to a steam pipeline, and the steam pipeline is used to introduce high-temperature steam into the rising film evaporator and the falling film evaporator.
[0021] Furthermore, the rising film evaporator and the falling film evaporator are both connected with a drain pipeline for discharging water generated after the high-temperature steam in the rising film evaporator and the falling film evaporator is cooled.
[0022] Furthermore, a brine inlet and a brine outlet are provided on the petroleum ether condenser, so as to introduce low-temperature brine into the petroleum ether condenser through the brine inlet to quickly liquefy the gaseous petroleum ether. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:
[0024] Figure 1 This is a schematic diagram of the structure of the sethoxydim high-salt wastewater treatment system provided by the utility model.
[0025] Description of reference numerals:
[0026] 1. Acetochlor wastewater tank; 2. Petroleum ether tank; 3. Ammonium chloride water tank; 4. Rising film evaporator; 5. Falling film evaporator; 6. Gas-liquid separator; 7. Petroleum ether condenser; 8. Acetochlor condenser; 9. Acetochlor tank; 10. Primary extraction machine; 11. Secondary extraction machine; 12. Filter; 13. Automatic regulating valve; 14. Flow meter; 15. Steam pipe; 16. Drain pipeline; 17. Brine inlet; 18. Brine outlet. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0028] It should be noted that the main concept of the sethoxydim high-salt wastewater treatment system provided by the utility model is: by setting an extractor and connecting the extractor to the sethoxydim wastewater tank and the petroleum ether tank, the petroleum ether and the extractor can be used to extract the sethoxydim in the sethoxydim wastewater, by setting a rising film evaporator and a falling film evaporator, the petroleum ether in the mixed liquid of sethoxydim and petroleum ether can be vaporized, by setting a gas-liquid separator, a petroleum ether condenser and an sethoxydim condenser, the gaseous petroleum ether and the liquid sethoxydim can be separated and condensed respectively to form liquid petroleum ether and sethoxydim, and the liquid petroleum ether can be repeatedly used in the subsequent extraction of sethoxydim.
[0029] After introducing the basic principle of the utility model, various non-limiting embodiments of the utility model are specifically introduced below. Any number of elements in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.
[0030] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.
[0031] Example 1 of the acetochlor high-salt wastewater treatment system provided by the utility model:
[0032] like Figure 1 As shown, the acetochlor high-salt wastewater treatment system includes an acetochlor wastewater tank 1, a petroleum ether tank 2, an extraction module, an ammonium chloride water tank 3, a primary separation module, a secondary separation module and an acetochlor tank 9. Among them, the acetochlor wastewater tank 1 is used to store the high-salt wastewater generated after acetochlor washing, the petroleum ether tank 2 is used to store petroleum ether, and the ammonium chloride water tank 3 is used to store the ammonium chloride water remaining after extraction.
[0033] About the extraction module. The extraction module includes a primary extraction machine 10 and a secondary extraction machine 11. The primary extraction machine 10 is connected to the petroleum ether tank 2, and the secondary extraction machine 11 is connected to the acetochlor wastewater tank 1. A filter 12 is provided between the acetochlor wastewater tank 1 and the secondary extraction machine 11 to filter the impurity particles in the acetochlor wastewater. An automatic regulating valve 13 and a flow meter 14 are provided between the filter 12 and the secondary extraction machine 11, and between the petroleum ether tank 2 and the primary extraction machine 10.
[0034] Regarding the primary separation module. The primary separation module includes a rising film evaporator 4 connected to the secondary extraction machine 11, and a falling film evaporator 5 connected to the rising film evaporator 4. The rising film evaporator 4 and the falling film evaporator 5 are both connected with a steam pipe 15 and a drain line 16. The steam pipe 15 is used to pass high-temperature steam into the rising film evaporator 4 and the falling film evaporator 5 to vaporize the petroleum ether in the mixed liquid of petroleum ether and acetochlor. The water generated after the high-temperature steam exchanges heat with the mixed liquid of petroleum ether and acetochlor is discharged through the drain line 16.
[0035] Specifically, a delivery pump (not shown in the figure) is provided between the secondary extractor 11 and the rising film evaporator 4 to deliver the mixed liquid of petroleum ether and acetochlor in the secondary extractor 11 to the rising film evaporator 4 .
[0036] About the secondary separation module. The secondary separation module includes a gas-liquid separator 6 connected to the falling film evaporator 5, and a petroleum ether condenser 7 and an acetochlor condenser 8 connected to the gas-liquid separator 6, the discharge port of the petroleum ether condenser 7 is connected to the petroleum ether tank 2, and the discharge port of the acetochlor condenser 8 is connected to the acetochlor tank 9.
[0037] In addition, the petroleum ether condenser 7 is provided with a brine inlet 17 and a brine outlet 18 , so that low-temperature brine is introduced into the petroleum ether condenser 7 through the brine inlet 17 to quickly liquefy the gaseous petroleum ether, and the brine after heat exchange is discharged from the brine outlet 18 .
[0038] The working principle of the sethoxydim high-salt wastewater treatment system provided by the utility model is as follows: the high-salt wastewater in the sethoxydim wastewater tank 1 is filtered by the filter 12 and then transported to the secondary extractor 11. At the same time, the petroleum ether in the petroleum ether tank 2 is transported to the primary extractor 10. The primary extractor 10 and the secondary extractor 11 are connected by countercurrent extraction. After extraction, the ammonium chloride in the high-salt wastewater is transported to the ammonium chloride water tank 3 for storage, and the petroleum ether and sethoxydim mixed liquid enters the rising film evaporator 4 and the falling film evaporator 5 in sequence. The petroleum ether is vaporized by the high-temperature steam in the rising film evaporator 4 and the falling film evaporator 5, and the sethoxydim remains in a liquid state. Subsequently, the gaseous petroleum ether and the liquid sethoxydim are transported to the gas-liquid separator 6 for separation. After that, the gaseous petroleum ether enters the petroleum ether condenser 7 for liquefaction, and the sethoxydim enters the sethoxydim condenser 8. Finally, the liquid petroleum ether is transported to the petroleum ether tank 2 for storage, and the sethoxydim is transported to the sethoxydim tank 9 for storage.
[0039] Example 2 of the acetochlor high-salt wastewater treatment system provided by the utility model:
[0040] The main difference between it and Example 1 is:
[0041] In Example 1, the primary separation module includes two extractors: a primary extractor and a secondary extractor.
[0042] In this embodiment, the primary separation module includes one or more extractors.
[0043] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and other terms indicating orientation or position relationship are based on the orientation or position relationship shown in the drawings of this specification, which are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.
[0044] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.
Claims
1. A system for treating high-salt wastewater containing acetochlor, characterized in that: include: Acetochlor wastewater tank, which is used to store high-salt wastewater generated after acetochlor washing; Petroleum ether tank, which is used to store petroleum ether; An extraction module, comprising an extractor connected to the acetochlor wastewater tank and the petroleum ether tank, the extractor being used to extract acetochlor from the acetochlor wastewater, and the ammonium chloride water obtained by the extraction is fed into an ammonium chloride water tank; A primary separation module, comprising a rising film evaporator connected to the extractor and a falling film evaporator connected to the rising film evaporator, for vaporizing petroleum ether to separate petroleum ether from acetochlor; A secondary separation module, comprising a gas-liquid separator connected to the falling film evaporator, and a petroleum ether condenser and an acetochlor condenser connected to the gas-liquid separator, wherein the drain port of the petroleum ether condenser is connected to the petroleum ether tank; An acetochlor tank is connected to the drain port of the acetochlor condenser and is used for collecting and storing acetochlor.
2. The acetochlor high-salt wastewater treatment system according to claim 1, characterized in that: There are two extractors, namely a primary extractor and a secondary extractor. The acetochlor wastewater tank and the rising film evaporator are connected to the secondary extractor, and the petroleum ether tank is connected to the primary extractor for countercurrent extraction.
3. The acetochlor high-salt wastewater treatment system according to claim 2, characterized in that: A filter is provided between the acetochlor wastewater tank and the secondary extractor to filter out impurity particles in the acetochlor wastewater.
4. The acetochlor high-salt wastewater treatment system according to claim 3, characterized in that: An automatic regulating valve and a flow meter are arranged between the filter and the secondary extractor.
5. The acetochlor high-salt wastewater treatment system according to any one of claims 2 to 4, characterized in that: An automatic regulating valve and a flow meter are arranged between the petroleum ether tank and the primary extractor.
6. The acetochlor high-salt wastewater treatment system according to claim 3 or 4, characterized in that: A delivery pump is provided between the secondary extraction machine and the rising film evaporator for delivering the mixed liquid of petroleum ether and acetochlor in the secondary extraction machine to the rising film evaporator.
7. The acetochlor high-salt wastewater treatment system according to any one of claims 1 to 4, characterized in that: The rising film evaporator and the falling film evaporator are both connected with a steam pipeline, and the steam pipeline is used to pass high-temperature steam into the rising film evaporator and the falling film evaporator.
8. The acetochlor high-salt wastewater treatment system according to claim 7, characterized in that: The rising film evaporator and the falling film evaporator are both connected with a drain pipeline for discharging water generated after the high-temperature steam in the rising film evaporator and the falling film evaporator is cooled.
9. The acetochlor high-salt wastewater treatment system according to any one of claims 1 to 4, characterized in that: The petroleum ether condenser is provided with a brine inlet and a brine outlet, so as to introduce low-temperature brine into the petroleum ether condenser through the brine inlet to rapidly liquefy gaseous petroleum ether.