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Recovery technology of methyl alcohol production waste heat

A methanol and waste heat technology, which is applied in the chemical industry, sustainable manufacturing/processing, preparation of organic compounds, etc., can solve the problem of high cost of recycling process, achieve the effect of reducing equipment investment, high thermal energy utilization rate, and low thermal energy consumption

Inactive Publication Date: 2019-05-24
ANHUI HAOYUAN CHEM IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a recovery process for methanol production waste heat, which has the advantage of low cost of recovery process for methanol production waste heat, and solves the problem of high cost of recovery process for methanol production waste heat

Method used

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  • Recovery technology of methyl alcohol production waste heat

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Effect test

Embodiment 1

[0024] A process for recovering waste heat from methanol production, comprising an atmospheric tower 1 and a pressurized tower 2, the left side of the atmospheric tower 1 communicates with the right side of the pressurized tower 2 through a pipeline, and the bottom of the left side of the atmospheric tower 1 communicates with the pipeline There is a preheater 3, and the bottom of the pressurized tower 2 is connected with a heater 4 through a pipeline. The specific recovery process includes the following steps: Step 1: Divide the methanol raw material into two raw materials with a mass ratio of 1.5:1, and divide the 1.5:1 The first part of methanol raw material is added in atmospheric tower 1 and carried out atmospheric rectification, obtains the tower bottom liquid of atmospheric tower 1 methanol vapor and atmospheric tower 1; Step 2: the tower bottom liquid of atmospheric tower 1 and 1.5: The second part of methanol raw material in 1 is respectively added to pressurized tower ...

Embodiment 2

[0026] In embodiment 1, add following operation:

[0027] The methanol raw material is methanol waste liquid produced in the chemical or pharmaceutical industry, and the concentration of methanol in the methanol raw material is not less than 50%.

[0028] A process for recovering waste heat from methanol production, comprising an atmospheric tower 1 and a pressurized tower 2, the left side of the atmospheric tower 1 communicates with the right side of the pressurized tower 2 through a pipeline, and the bottom of the left side of the atmospheric tower 1 communicates with the pipeline There is a preheater 3, and the bottom of the pressurized tower 2 is connected with a heater 4 through a pipeline. The specific recovery process includes the following steps: Step 1: divide the methanol raw material into two raw materials with a mass ratio of 2:1, and divide the 2:1 The first part of methanol raw material is added in atmospheric tower 1 and carried out atmospheric rectification, ob...

Embodiment 3

[0030] In embodiment 2, add following operation:

[0031] The top of the left side of the atmospheric tower 1 is connected with the atmospheric tower reflux tank 5 through the pipeline, the top of the atmospheric tower reflux tank 5 is connected with the atmospheric tower reflux pump 6 through the pipeline, and the right side of the atmospheric tower reflux pump 6 is connected with the normal pressure tower reflux pump 6 through the pipeline. Atmospheric tower condenser 7 is arranged, and the bottom of atmospheric tower condenser 7 is communicated with the top of atmospheric tower 1 by pipeline, and the right side of atmospheric tower 1 is communicated with suction pump 9 by pipeline, and the right side of suction pump 9 It communicates with the left side of the pressurization tower 2 through a pipeline.

[0032] A process for recovering waste heat from methanol production, comprising an atmospheric tower 1 and a pressurized tower 2, the left side of the atmospheric tower 1 co...

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Abstract

The invention discloses a recovery technology of methyl alcohol production waste heat. An atmospheric tower and a pressurizing tower are included, the left side of the atmospheric tower is communicated with the right side of the pressurizing tower, the bottom of the left side of the atmospheric tower is communicated with a preheating device through a pipeline, and the bottom of the pressurizing tower is communicated with a heating device through a pipeline. The recovery technology comprises the steps that 1, a methyl alcohol raw material is divided into two parts of raw materials with the massratio being 1.5:1-10:1, the first part of the methyl raw material with the mass ratio of 1.5:1 is added to the atmospheric tower, and atmospheric distillation is conducted. The recovery technology has the advantages that the heat of methyl alcohol vapour of the atmospheric tower is thoroughly utilized, the thermal energy utilization rate of the methyl alcohol at the top of the pressurizing toweris higher, the overall thermal energy consumption is lower in the methyl alcohol recovery process, a certain amount of methyl alcohol raw material is added to the atmospheric tower and the pressurizing tower respectively to allow vapor-liquid loads of the atmospheric tower and the pressurizing tower to be in the optimal state, the diameter of the two towers is reduced, and equipment investment isreduced to help people to use the towers.

Description

technical field [0001] The invention relates to the technical field of methanol production heat recovery, in particular to a recovery process for methanol production waste heat. Background technique [0002] Methanol is the simplest saturated monoalcohol with a CAS number of 67-56-1 or 170082-17-4, a molecular weight of 32.04, and a boiling point of 64.7°C. It is also called "wood alcohol" or "Wood essence" is a colorless, volatile liquid with an alcohol smell. The lowest dose of human oral poisoning is about 100mg / kg body weight. Oral ingestion of 0.3-1g / kg can cause death. It is used in the manufacture of formaldehyde and pesticides, etc., and used as The extraction agent of organic matter and the denaturant of alcohol etc., the finished product is usually made by the reaction of carbon monoxide and hydrogen. Methanol is an important organic chemical product. At present, the main raw materials for the production of methanol are coal and natural gas. Methanol is a transpare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/80C07C31/04
CPCY02P20/50
Inventor 凡殿才张超李超群孟少林
Owner ANHUI HAOYUAN CHEM IND GRP
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