Process method for circularly utilizing waste water produced by butadiene preparation through butene oxidative dehydrogenation

A technology of oxidative dehydrogenation and process method, which is applied in the chemical industry, can solve problems such as the clogging of the spray head, and achieve the effect of reducing the load

Active Publication Date: 2012-12-19
HUNAN BAILI ENGINEERING SCIENCE AND TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sewage is directly sprayed into the reactor, and the acid aldehyde in the sewage may cause the blockage of the sewage spray pipe and the sewage spray head

Method used

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  • Process method for circularly utilizing waste water produced by butadiene preparation through butene oxidative dehydrogenation
  • Process method for circularly utilizing waste water produced by butadiene preparation through butene oxidative dehydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The oxidation unit of the butadiene plant with an annual output of 100,000 tons of butene oxidative dehydrogenation adopts the aldehyde washing wastewater circulation process of the present invention. After being treated by the stripping tower, about 50% of the wastewater enters the aldehyde washing tower to wash aldehyde, and the rest of the wastewater is sent to In the sewage treatment system, the aldehyde washing tower supplements part of the desalinated water; and the waste water from the acid washing process is sent to the sewage treatment system after being treated by the waste water distillation tower. The effect is:

[0023] The amount of desalted water to be added to the aldehyde washing tower is: 30 tons / hour

[0024] The amount of desalted water to be added to the waste heat boiler is: 62.5 tons / hour

[0025] The amount of wastewater to be treated by the sewage treatment system is: 112.3 tons / hour

[0026] When the waste water from the butadiene oxidation u...

Embodiment 2

[0032] The oxidation unit of the butadiene plant with an annual output of 100,000 tons of butene oxidative dehydrogenation adopts the acid washing wastewater circulation process of the present invention. After the acid washing wastewater is treated in the wastewater distillation tower, about 50% of the wastewater enters the waste heat boiler and then enters the steam produced Reactor, the rest of the wastewater is sent to the sewage treatment system for treatment; the aldehyde washing wastewater is treated by the stripping tower, and all of it is discharged into the sewage treatment system. The effect is:

[0033] The amount of desalted water to be supplemented by the aldehyde washing tower is: 66.5 tons / hour

[0034] The amount of desalted water to be added to the waste heat boiler is: 25 tons / hour

[0035] The amount of wastewater to be treated by the sewage treatment system is: 111.3 tons / hour

[0036] When the waste water from the butadiene oxidation unit produced by the...

Embodiment 3

[0042] The oxidation unit of the butadiene plant with an annual output of 100,000 tons of butene oxidative dehydrogenation adopts the recycling process of acid washing wastewater and aldehyde washing wastewater of the present invention. After the acid washing wastewater is treated by the wastewater distillation tower, about 50% of the wastewater enters the waste heat boiler and The production steam enters the reactor again, and the remaining wastewater is sent to the sewage treatment system for treatment; after the aldehyde washing wastewater is blown off, about 50% is returned to the aldehyde washing tower for washing aldehyde recycling, and the rest of the wastewater is sent to the sewage treatment system, and a small amount of aldehyde washing tower is replenished desalinated water. The effect is:

[0043] The amount of desalted water to be added to the aldehyde washing tower is: 30 tons / hour

[0044] The amount of desalted water to be added to the waste heat boiler is: 25...

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Abstract

The invention relates to a process method for circularly utilizing waste water produced by butadiene preparation through butene oxidative dehydrogenation and belongs to the technical field of chemical industry. The process method is characterized in that: firstly, most of the waste water is sent to an exhaust-heat recovery boiler for use after most organic matters in the waste water discharged from a water-cooling acid rinsing tower are deprived through a waste water distillation tower, and desalted water replenishing of the exhaust-heat recovery boiler is replaced; secondly, partial waste water returns an aldehyde rinsing tower for reusing after most aldehydes in the waste water discharged from the aldehyde rinsing tower are deprived through a blowdown tower, and desalted water using quantity of the aldehyde rinsing tower is reduced; and thirdly, low temperature condensation is carried out for tail gas containing acid and aldehyde, organic matters condensate liquid in the tail gas is recycled, and loads of a waste gas processing system is lightened. Compared with the prior art, a waste water classifying treatment and cyclic utilization process of the process method effectively reduces water replenishing quantity of a technical process, greatly reduces effluent quantity of the waste water simultaneously, reduces a chemical oxygen demand (COD) concentration of discharged sewage and an organic content in discharged gas, and has advantages of being economic, environment-friendly and the like.

Description

technical field [0001] The invention relates to a process method for recycling waste water produced by oxidative dehydrogenation of butene to butadiene, which belongs to the technical field of chemical industry. Background technique [0002] In recent years, many sets of ethylene cracking units, refinery catalytic units and methanol-to-olefins units have been built in China, and a large amount of mixed carbon four is produced by-product. In addition to the separation and utilization of butadiene and isobutene, a large amount of butene- 1. Butene-2 ​​and butane are used as fuel. Due to the rapid development of the rubber industry in recent years, the supply of butadiene as a raw material for various rubbers can no longer meet the production needs, and it will be difficult to change in the next few years. The process route of producing butadiene by oxidative dehydrogenation of butene has great potential application prospects. [0003] The process of oxidative dehydrogenation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/167C07C5/327B01D53/00B01D53/18B01D5/00C02F1/20C02F1/04
CPCY02P20/10Y02P20/50Y02P70/10
Inventor 李文辉王昌飞蔡日新王维山
Owner HUNAN BAILI ENGINEERING SCIENCE AND TECHNOLOGY CO LTD
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