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CN-224207734-U - Tetrahydrofuran byproduct catalytic conversion and recycling treatment system

CN224207734UCN 224207734 UCN224207734 UCN 224207734UCN-224207734-U

Abstract

The utility model relates to the technical field of tetrahydrofuran byproduct treatment, in particular to a tetrahydrofuran byproduct catalytic conversion and recycling treatment system, which is characterized in that waste gas is led into a preprocessor through an air inlet pipe, the waste gas is fully contacted with an absorption liquid to reduce the sulfide content in the waste gas, the treated waste gas enters a heater, the temperature of the waste gas is raised to a proper level by the heater, the preprocessor absorbs the sulfide in the waste gas by the absorption liquid, the sulfide content in the waste gas entering a combustor is greatly reduced, the chemical reaction between sulfur-containing gas and a catalyst active center during combustion is effectively avoided, the catalyst poisoning is prevented, and the service life of the catalyst is prolonged. In this way, the catalyst can continuously and efficiently assist the combustion and decomposition of byproducts, and the stability and the persistence of the combustion treatment are ensured.

Inventors

  • SHI ZHAOYANG
  • WEI XIANG
  • WANG YANBIN

Assignees

  • 宿迁市盈科新材料有限公司

Dates

Publication Date
20260508
Application Date
20250507

Claims (6)

  1. 1. A tetrahydrofuran byproduct catalytic conversion and recycling treatment system comprises a preprocessor (110), a heater (120) and a combustor (130), and is characterized in that an air inlet pipe (1101) and an air outlet pipe (1102) are respectively arranged on the left side wall and the right side wall of the preprocessor (110), one end of the air outlet pipe (1102) is communicated with the heater (120), absorption liquid is stored in an inner cavity of the preprocessor (110), one end of the air inlet pipe (1101) is bent downwards to extend below the liquid level of the absorption liquid, and the system further comprises a communicating pipe (140), and the communicating pipe (140) is used for communicating the heater (120) and the combustor (130).
  2. 2. The catalytic conversion and recycling treatment system for tetrahydrofuran by-products of claim 1, wherein a partition plate (1301) is arranged in an inner cavity of the combustor (130), the partition plate (1301) is made of a heat conducting material, the inner cavity of the combustor (130) is divided into a heat exchange chamber (1302) and a combustion chamber (1303) which are arranged up and down by the partition plate (1301), a communicating pipe (140) is communicated with the combustion chamber (1303), the catalytic conversion and recycling treatment system further comprises a circulating water pipe (150) and a water pump (160), a part of pipe sections of the circulating water pipe (150) extend into the heat exchange chamber (1302), and the bottom wall of the extending pipe sections are attached to the upper end face of the partition plate (1301).
  3. 3. The catalytic conversion and recycling treatment system of tetrahydrofuran by-product according to claim 2, wherein the pipe section of the circulating water pipe (150) located in the heat exchange chamber (1302) is provided with a plurality of bending parts (1501).
  4. 4. A catalytic conversion and recycling system for tetrahydrofuran by-products as recited in claim 2, wherein a portion of the circulating water pipe (150) extends into the heater (120) to heat the gas entering the heater (120).
  5. 5. The catalytic conversion and recycling system for tetrahydrofuran by-products of claim 4, wherein the pipe section of the circulating water pipe (150) extending into the heater (120) is in a spiral coil structure (1502).
  6. 6. The catalytic conversion and recycling system for tetrahydrofuran by-products of claim 4, wherein the outer surface of the pipe section of the circulating water pipe (150) which does not extend into the heater (120) and the burner (130) is coated with an insulating layer.

Description

Tetrahydrofuran byproduct catalytic conversion and recycling treatment system Technical Field The utility model relates to the technical field of tetrahydrofuran byproduct treatment, in particular to a tetrahydrofuran byproduct catalytic conversion and recycling treatment system. Background Tetrahydrofuran is used as a key organic synthesis raw material and a high-quality solvent, and various byproducts are inevitably generated in the production process. These by-products are complex in composition and, once discharged directly, can cause serious environmental pollution. Currently, incineration means are commonly employed in the prior art to treat these byproducts. However, the high boiling and structurally stable organic compounds present in the by-products are extremely difficult to completely burn and decompose under conventional conditions. Therefore, the catalyst is usually used for accelerating the reaction process and pushing the byproducts to be fully combusted so as to reduce the harm to the environment. The problem is that these byproducts often contain some amount of sulfide. During combustion, sulfur compounds react with oxygen to produce sulfur-containing gases such as sulfur dioxide. The sulfur-containing gas has strong chemical activity and can react with the active center of the catalyst to poison the catalyst. The activity and selectivity of the catalyst are greatly reduced after the catalyst is poisoned. To solve the sulfide problem, absorbing the sulfide with water is a common pretreatment mode. However, the method can change the temperature and humidity of the waste gas, so that the subsequent combustion treatment process is unstable, and the treatment effect and efficiency are affected. Disclosure of utility model Aiming at the problems in the prior art, the utility model provides a tetrahydrofuran byproduct catalytic conversion and recycling treatment system. In order to solve the technical problems, the utility model is solved by the following technical scheme: A catalytic conversion and recycling treatment system for tetrahydrofuran byproducts comprises a preprocessor, a heater and a burner, wherein an air inlet pipe and an air outlet pipe are respectively arranged on the left side wall and the right side wall of the preprocessor, one end of the air outlet pipe is communicated with the heater, an absorption liquid is stored in an inner cavity of the preprocessor, one end of the air inlet pipe is bent downwards and extends below the liquid level of the absorption liquid, and the system further comprises a communicating pipe which is used for communicating the heater and the burner. The waste gas containing various byproducts generated in the tetrahydrofuran production process is led into the preprocessor through the air inlet pipe. The air inlet pipe is purposely bent downwards and extends to below the liquid level of the absorption liquid in the inner cavity of the pretreatment device. This design allows the exhaust gas to be in sufficient contact with the absorption liquid, since the sulphide is readily soluble in the absorption liquid, and the sulphide content in the exhaust gas is substantially reduced by this absorption process. However, the temperature of the exhaust gas after the absorption treatment is lowered by contact with the absorption liquid. The treated waste gas is discharged from the gas outlet pipe and enters the heater connected with the gas outlet pipe. The heater heats the exhaust gas to raise the exhaust gas temperature to a suitable level. This is done to provide a higher and stable temperature of the exhaust gas before it enters the burner, and to provide conditions for stable combustion in the burner. The waste gas after temperature rising smoothly enters the burner by means of the communicating pipe. At this point, the sulfide content of the exhaust gas has been significantly reduced and the temperature is appropriate. In the burner, the organic compound with high boiling point and stable structure in the waste gas can be fully combusted and decomposed under the action of the catalyst, thereby realizing the effective treatment of the tetrahydrofuran by-product. The preprocessor utilizes the absorption liquid to absorb sulfide in the waste gas, so that the sulfide content in the waste gas entering the burner is greatly reduced. The method effectively avoids the chemical reaction between the sulfur-containing gas and the active center of the catalyst during combustion, prevents the catalyst from being poisoned and prolongs the service life of the catalyst. In this way, the catalyst can continuously and efficiently assist the combustion and decomposition of byproducts, and the stability and the persistence of the combustion treatment are ensured. The burner comprises a burner body, a combustion chamber, a circulating water pipe, a water pump, a heat exchange pipe and a heat exchange pipe, wherein the inner cavity of the burner is provided with a partition plate