Residual liquid recovery system of PTA hydrogen recovery device

A recovery device and recovery system technology, applied in the direction of hydrogen separation, etc., can solve the problems of waste, increase the cost of environmental protection treatment, etc., achieve the effect of constant temperature, eliminate hydrogen accumulation and explosion, and avoid personnel poisoning

Pending Publication Date: 2020-11-20
HENGLI PETROCHEM DALIAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The usual treatment method is to discharge the residual liquid directly into the waste liquid well, and the direct discharge of this part of the organic matter into the sewage will greatly increase the cost of environmental protection treatment, cause unnecessary waste, and cause other potential risks

Method used

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  • Residual liquid recovery system of PTA hydrogen recovery device

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Embodiment 1

[0019] A kind of raffinate recovery system of PTA hydrogen recovery device, comprises raffinate discharge tank 26, is also provided with raffinate recovery tank 28, and raffinate discharge tank is connected with described raffinate recovery tank through raffinate main line 27; Described raffinate recovery The side of the tank is provided with a raffinate delivery pump 16, and the raffinate is pumped to the PTA production oxidation device through the raffinate delivery pump; the raffinate recovery tank is also provided with a liquid level gauge 11, a gas phase venting pipeline, an overflow discharge pipeline 25, an on-site pressure Table 9. Tank bottom discharge valve 12. When there are more than two residual liquid discharge tanks, a residual liquid isolation valve 1 is provided before the discharge pipelines of each residual liquid discharge tank converge to the main line. The residual liquid recovery tank is an atmospheric tank. The overflow discharge pipeline is an inverte...

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Abstract

The invention belongs to the technical field of PTA production, and particularly relates to a residual liquid recovery system of a PTA hydrogen recovery device. The residual liquid recovery system comprises a residual liquid discharging tank and is further provided with a residual liquid recycling tank, and the residual liquid discharging tank is connected with the residual liquid recycling tank through a residual liquid main pipeline; a residual liquid conveying pump is arranged on the side surface of the residual liquid recycling tank, and residual liquid is conveyed to a PTA production oxidation device through the residual liquid conveying pump; and the residual liquid recycling tank is also provided with a liquid level meter, a gas phase emptying pipeline, an overflow discharge pipeline, a field pressure gauge and a tank bottom discharge valve. The residual liquid recovery system can solve the problem of existing residual liquid recovery, has residual liquid flow continuous controllability and constant temperature anti-freezing performance, eliminates the possibility of hydrogen gathering explosion from the source, and greatly reduces the possibility of environmental pollutioncaused by manual operation and the volatility of toxic and harmful substances under non-closed conditions.

Description

technical field [0001] The invention belongs to the technical field of PTA production, in particular to a residual liquid recovery system of a PTA hydrogen recovery device. Background technique [0002] In order to maximize the utilization of effective resources, the current PTA industry will reuse effective resources. Under normal circumstances, about 15% of the PTA hydrogenation reactor participates in the reaction, and the remaining hydrogen enters the hydrogen recovery system after flashing through the first crystallizer. This part of the gas can only be recovered after cooling down the temperature and pressure in several stages such as the hydrogen recovery reactor, so this process will produce condensed residual liquid. There are a variety of organic substances in the generated raffinate because they have participated in the process reaction. The raffinate is produced every moment with the operation of the hydrogen recovery system, and this part of organic matter will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/50
CPCC01B3/50
Inventor 崔洪超沈宇鑫
Owner HENGLI PETROCHEM DALIAN
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