A gas-liquid separation device for a vacuum unit in production of clethodim
By introducing a gas-liquid separation device into the production of clethodim, the problem of liquid entering the detection instruments of the vacuum unit was solved, achieving safe production and efficient detection, and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING CYNDA CHEM CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-09
AI Technical Summary
In existing clethodim production, the liquid generated by the vacuum unit during operation can flow into the testing instruments, causing data distortion, instrument damage, safety hazards, and low production efficiency.
Design a gas-liquid separation device to separate the gas and liquid generated by the vacuum unit. The liquid is periodically treated through a circulating liquid storage tank to prevent the liquid from entering the detection device. The gas-liquid separation is achieved by using a circulating pump and a gas-liquid separator, and the liquid discharge is controlled by a sight glass.
It ensures the safety of operators and the cleanliness of the environment, prevents equipment damage, and improves production efficiency and testing accuracy.
Smart Images
Figure CN224331526U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of chemical production technology, specifically relating to a gas-liquid separation device for a vacuum unit in the production of clethodim. Background Technology
[0002] Clethodim, chemically named [±]-2-[(E)-3-chloroallyloxyimino]propyl-5-[2-(ethylthio)propyl]-3-hydroxycyclohexyl-2-enone, belongs to the cyclohexenone class of selective herbicides. Clethodim is a systemic, highly selective ACCase inhibitor suitable for controlling barnyard grass, wild oats, crabgrass, foxtail grass, goosegrass, annual bluegrass, and other grassy weeds in most dicotyledonous crops such as cotton, peanuts, soybeans, tobacco, rapeseed, and orchards. 5-[2-(ethylthio)propyl]-3-hydroxy-2-propionyl-2-cyclohexen-1-one is an important intermediate of clethodim. In the production process of 5-[2-(ethylthio)propyl]-3-hydroxy-2-propionyl-2-cyclohexen-1-one, after decarboxylation, the final product, 5-[2-(ethylthio)propyl]-3-hydroxy-2-propionyl-2-cyclohexen-1-one, needs to be extracted with petroleum ether. The existing production process uses a high-vacuum unit to perform negative pressure distillation of the triketone to obtain a refined product. This vacuum unit is directly connected to a McLaurel vacuum gauge, display instrument, and vacuum gauge, which are then connected to subsequent production equipment. Because the vacuum unit generates (condensed) liquid during operation, this liquid can flow into the aforementioned detection instruments, causing data distortion and instrument damage. Furthermore, the process can cause liquid leakage and odor diffusion, seriously endangering the safety of operators. Frequent maintenance is required, reducing production efficiency. Therefore, it is urgent to solve these problems in actual production. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a gas-liquid separation device for vacuum units in the production of clethodim. This device overcomes the defects in the prior art, can ensure the safety of employees and the environment, ensure the detection effect, and improve production efficiency.
[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:
[0005] A gas-liquid separation device for a vacuum unit in clethodim production includes a vacuum unit with an air inlet at one end and an air outlet at the other end. The air outlet is connected to a circulating liquid storage tank via pipes, valves, and a circulating pump (the circulating pump and circulating liquid circulate water to maintain a negative pressure in the system). The top of the circulating liquid storage tank has a condensate inlet, which is connected to a condensate outlet at the bottom of the gas-liquid separator via pipes and valves. The upper part of the gas-liquid separator has a separator outlet and a detection port. The separator outlet is connected to the vacuum unit's air inlet via a pipe, and the detection port is connected to a detection device via a pipe.
[0006] Preferably, the circulating pump is model 2BV6161, manufactured by Nantong Weishi Vacuum Equipment Co., Ltd.
[0007] Preferably, the valves at the bottom of the gas-liquid separator include a first ball valve and a second ball valve, with a sight glass between the first ball valve and the second ball valve; this allows for direct observation of the liquid generation inside the tank and better control of the gas-liquid separation.
[0008] Preferably, the gas-liquid separator has a specification of 1L (diameter 0.08m, height 0.3m) and is manufactured by Wuxi Hanying Machinery Manufacturing Co., Ltd.
[0009] Preferably, the bottom of the circulating liquid storage tank is provided with a drain port, which is connected to the circulating liquid collection device through a pipe, valve and pump.
[0010] Preferably, the detection device includes a McLaurel vacuum gauge, a display, and a vacuum gauge.
[0011] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:
[0012] This invention, by adding a gas-liquid separation device, overcomes the shortcomings of existing technologies that require draining the liquid accumulated in the pipeline after the vacuum unit during periodic vacuum testing, resulting in a strong odor from the drained liquid and environmental pollution (if this liquid is not drained, it will flow into the aforementioned testing instruments, causing data distortion and instrument damage). The gas-liquid separation device allows the liquid generated during the operation of the vacuum unit to be discharged into a circulating liquid storage tank and periodically disposed of. In this way, the liquid in the pipeline is in a sealed state during the discharge process, thus preventing odor from escaping. This ensures the personal and environmental safety of operators and prevents problems such as reduced production efficiency and increased labor intensity caused by equipment damage.
[0013] In summary, this invention can ensure the safety of employees and the environment, guarantee testing results, and improve production efficiency. Attached Figure Description
[0014] Figure 1This is a structural schematic diagram of an embodiment of the present utility model;
[0015] In the diagram, 1 is a vacuum unit; 2 is a circulating pump; 3 is a circulating liquid storage tank; 4 is a gas-liquid separator; and 5 is a detection device. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0017] Example 1:
[0018] like Figure 1 As shown, a gas-liquid separation device for a vacuum unit in the production of clethodim includes a vacuum unit 1. One end of the vacuum unit 1 is provided with a unit inlet (not shown), and the other end is provided with a unit outlet (not shown). The unit outlet is connected to a circulating liquid storage tank 3 through a pipe (not shown), a valve (not shown), and a circulating pump 2. The top of the circulating liquid storage tank 3 is provided with a condensate inlet (not shown). The condensate inlet is connected to a condensate outlet (not shown) at the bottom of a gas-liquid separator 4 through a pipe and a valve. The upper part of the gas-liquid separator 4 is provided with a separator outlet (not shown) and a detection outlet (not shown). The separator outlet is connected to the unit inlet of the vacuum unit 1 through a pipe, and the detection outlet is connected to a detection device 5 through a pipe.
[0019] In actual production: the outlet pipe of vacuum unit 1 transports gas and generated liquid to circulating liquid storage tank 3 through circulating pump 2. The liquid is temporarily stored in circulating liquid storage tank 3 or participates in the circulation of circulating liquid storage tank 3 (to form negative pressure). When the liquid in circulating liquid storage tank 3 accumulates to a certain level, it is transported to circulating liquid collection device for treatment through the drain port.
[0020] The gas-liquid separator 4 is connected between the vacuum unit 1 and the detection device 5. It can provide the detection device with the negative pressure generated by the vacuum unit 1, and at the same time, it can separate the gas and liquid in the corresponding pipeline. The gas enters the vacuum unit 1 through the separator outlet, and the liquid is periodically discharged to the circulating liquid storage tank 3 through the condensate outlet.
[0021] After a period of production, liquid will accumulate inside the gas-liquid separator 4. At this time, open the condensate outlet at the bottom of the gas-liquid separator 4, first open the first ball valve above the sight glass to allow the liquid to enter, then close the first ball valve. Next, open the second ball valve below the sight glass to drain the liquid completely, preventing vacuum leakage. Repeat this process until the liquid is completely drained, or drain it all at once after the equipment is stopped. This prevents damage to the detection device from the liquid and also prevents odor leakage.
[0022] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.
Claims
1. A gas-liquid separation device for a vacuum unit in the production of clethodim, characterized in that: The system includes a vacuum unit, with an air inlet at one end and an air outlet at the other end. The air outlet is connected to a circulating liquid storage tank via pipes, valves, and a circulating pump. The circulating liquid storage tank has a condensate inlet at the top, which is connected to a condensate outlet at the bottom of a gas-liquid separator via pipes and valves. The gas-liquid separator has a separator outlet and a detection outlet at its upper part. The separator outlet is connected to the vacuum unit's air inlet via a pipe, and the detection outlet is connected to a detection device via a pipe.
2. The gas-liquid separation device for vacuum units in clethodim production as described in claim 1, characterized in that: The valves at the bottom of the gas-liquid separator include a first ball valve and a second ball valve, with a sight glass provided between the first ball valve and the second ball valve.
3. The gas-liquid separation device for vacuum units in clethodim production as described in claim 1, characterized in that: The detection device includes a McLaren vacuum gauge, a display instrument, and a vacuum gauge.
4. The gas-liquid separation device for vacuum units in clethodim production as described in claim 1, characterized in that: The bottom of the circulating liquid storage tank is equipped with a drain port, which is connected to the circulating liquid collection device through pipes, valves and pumps.