MVR (Mechanical Vapor Recompression) and vacuum technology coupling system for treating furanphenol waste salt

Abstract

The utility model discloses an MVR (mechanical vapor recompression) and vacuum technology coupling system for furan phenol waste salt treatment, which relates to the technical field of furan phenol waste salt treatment and comprises a condenser, a separation chamber, a demister, a compressor and a circulating pump. One side of the upper end of the separation chamber is connected with a demister through a pipeline, the demister is connected with a compressor through a pipeline, the compressor is connected with a condenser through a pipeline, the condenser is connected with a roots pump through a tail gas pipeline, and the tail gas pipeline is connected with the condenser through a vacuum pipeline. According to the system, compressed gas is used as a steam source of a steam pump, a circulating heat exchanger is used as a condenser of the steam pump, negative pressure is formed, a separation chamber is used, an auxiliary roots vacuum pump is used for vacuum starting or non-condensable gas emptying, the MVR technology and the vacuum technology are coupled together, and therefore the furan phenol waste salt treatment efficiency is improved, and energy saving and continuous production are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of furanol waste salt disposal, in particular to a coupling system of MVR and vacuum technology for furanol waste salt disposal. Background Art

[0002] The chemical name of furanol is 2,3-dihydro-2,2-dimethyl-7-benzofuranol. It is mainly used as an important intermediate for the synthesis of pesticides such as carbofuran (furadan), carbofuran butysulfuron, carbofuran benfuracarb, oxadiazine, furamicarb and other carbamate pesticides. It can also be widely used for pest control of crops such as cotton, rice, corn, soybeans, sugarcane, sorghum and fruit trees. It has the effect of shortening the crop production period and promoting the growth and development of crops, which can effectively increase the yield of crops. It can also be used as a pharmaceutical intermediate. The waste brine generated in the production process of furanol contains a small amount of organic matter, a small amount of sodium carbonate, and a large amount of sodium chloride. The waste brine is difficult to treat, resulting in a large amount of water resources and salt waste.

[0003] At present, furanol waste salt is mostly treated by evaporation crystallization, cooling crystallization and other processes. Taking energy saving and continuous production process technology into consideration, evaporation crystallization MVR is the most widely used. The MVR technology currently used is the most common process of material circulation → evaporation → compression → heat exchange, but the existing technology is not equipped with vacuum use and cannot maintain the micro-negative pressure state of the separation chamber, resulting in low efficiency and poor stability of furanol waste salt treatment. For this purpose, a coupling system of MVR and vacuum technology for furanol waste salt treatment is provided. Utility Model Content

[0004] The purpose of the utility model is to provide a coupling system of MVR and vacuum technology for the treatment of furanol waste salt in view of the defects of the prior art, so as to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a coupling system of MVR and vacuum technology for the treatment of furanol waste salt, comprising a condenser, a separation chamber, a demister, a compressor, and a circulating pump, wherein the top and bottom of the condenser are connected to the bottom of the separation chamber through pipelines, one side of the upper end of the separation chamber is connected to the demister through a pipeline, the demister is connected to the compressor through a pipeline, the compressor is connected to the condenser through a pipeline, the condenser is connected to a Roots pump through an exhaust gas pipeline, and the exhaust gas pipeline is connected to the condenser through a vacuum pipeline.

[0006] As a preferred technical solution of the utility model, a circulation pump is installed on the connecting pipeline between the bottom of the condenser and the bottom of the separation chamber.

[0007] As a preferred technical solution of the utility model, a condensate pipeline is connected to one side of the lower end of the condenser.

[0008] As a preferred technical solution of the utility model, the compressor, the circulating pump and the Roots pump are all connected to the control system.

[0009] As a preferred technical solution of the utility model, a condenser tube is installed inside the condenser.

[0010] As a preferred technical solution of the utility model, the Roots pump is also connected to the condenser through a vacuum pipeline.

[0011] The beneficial effects of the utility model are as follows: the system uses compressed gas as the steam source of the steam pump, and the circulating heat exchanger as the condenser of the steam pump to form negative pressure, and uses a separation chamber to assist the Roots vacuum pump for vacuum startup or non-condensable gas emptying. The system couples MVR with vacuum technology to improve the treatment efficiency of furanol waste salt and achieve energy saving and continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] In the figure: condenser 1, separation chamber 2, demister 3, compressor 4, circulation pump 5, condensate pipeline 6, Roots pump 7, vacuum pipeline 8, exhaust gas pipeline 9. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0015] Example: See Figure 1 The utility model provides a technical solution: a coupling system of MVR and vacuum technology for the treatment of furanol waste salt, comprising a condenser 1, a separation chamber 2, a demister 3, a compressor 4, and a circulating pump 5. The top and bottom of the condenser 1 are connected to the bottom of the separation chamber 2 through pipelines, one side of the upper end of the separation chamber 2 is connected to the demister 3 through a pipeline, the demister 3 is connected to the compressor 4 through a pipeline, the compressor 4 is connected to the condenser 1 through a pipeline, the condenser 1 is connected to a Roots pump 7 through an exhaust pipeline 9, and the exhaust pipeline 9 is connected to the condenser 1 through a vacuum pipeline 8.

[0016] A circulation pump 5 is installed on the connecting pipeline between the bottom of the condenser 1 and the bottom of the separation chamber 2 , and the circulation pump 5 is used to realize the circulation flow between the feed liquid in the separation chamber 2 and the condenser 1 .

[0017] A condensate pipeline 6 is connected to the lower end of the condenser 1 .

[0018] The compressor 4, the circulating pump 5 and the Roots pump 7 are all connected to a control system, and the control system is used to control the compressor 4, the circulating pump 5 and the Roots pump 7 to be powered on and work.

[0019] A condenser tube is installed inside the condenser 1 .

[0020] The Roots pump 7 is also connected to the condenser 1 via a vacuum line 8 .

[0021] Working principle: A coupling system of MVR and vacuum technology for the treatment of furanol waste salt. When in use, the evaporation crystallization MVR and vacuum technology are coupled to improve the efficiency and quality of furanol waste salt treatment. Specifically, the furanol waste salt is transported to the condenser 1 through the circulation pump 5 and the pipeline, and then transported to the separation chamber 2 through the pipeline at the top of the condenser 1 after the feed liquid is heated. The boiling feed liquid generates steam in the separation chamber 2, and then after being defoamed by the demister 3, the compressor 4 is used to compress the secondary steam generated by evaporation, so that the temperature and pressure of the secondary steam are increased, and the thermal enthalpy is increased. The heat generated by the compressor 4 is transported to the condenser 1 through the pipeline to heat the feed liquid. At the same time, the tail gas generated by the condenser 1 is compressed into a vacuum by the Roots pump 7 and then transported to the condenser 1. The Roots pump 7 is used as a vacuum start or non-condensable gas emptying problem, thereby achieving energy saving and continuous production.

[0022] The system uses compressed gas as the steam source of the steam pump, and the circulating heat exchanger as the condenser of the steam pump to form negative pressure. The separation chamber is used to assist the Roots vacuum pump for vacuum startup or non-condensable gas emptying. This system couples MVR with vacuum technology to improve the efficiency of furanol waste salt disposal and achieve energy saving and continuous production.

[0023] The above embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A coupling system of MVR and vacuum technology for the treatment of furanol waste salt, comprising a condenser (1), a separation chamber (2), a demister (3), a compressor (4), and a circulating pump (5), characterized in that: The top and bottom of the condenser (1) are connected to the bottom of the separation chamber (2) via pipelines; one side of the upper end of the separation chamber (2) is connected to a demister (3) via a pipeline; the demister (3) is connected to a compressor (4) via a pipeline; the compressor (4) is connected to the condenser (1) via a pipeline; the condenser (1) is connected to a Roots pump (7) via an exhaust gas pipeline (9); and the exhaust gas pipeline (9) is connected to the condenser (1) via a vacuum pipeline (8).

2. The coupling system of MVR and vacuum technology for treating furanol waste salt according to claim 1, characterized in that: A circulation pump (5) is installed on the connecting pipeline between the bottom of the condenser (1) and the bottom of the separation chamber (2).

3. The coupling system of MVR and vacuum technology for treating furanol waste salt according to claim 1, characterized in that: A condensate pipeline (6) is connected to one side of the lower end of the condenser (1).

4. The coupling system of MVR and vacuum technology for treating furanol waste salt according to claim 1, characterized in that: The compressor (4), the circulating pump (5) and the Roots pump (7) are all connected to a control system.

5. The coupling system of MVR and vacuum technology for treating furanol waste salt according to claim 1, characterized in that: A condenser tube is installed inside the condenser (1).

6. The coupling system of MVR and vacuum technology for treating furanol waste salt according to claim 1, characterized in that: The Roots pump (7) is also connected to the condenser (1) via a vacuum pipeline (8).

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