Low-grade waste heat recovery system and process of coking production system

A technology of waste heat recovery system and production system, applied in the direction of preheating, steam superheating, steam generation, etc., can solve the waste of low-temperature waste heat resources, increase energy consumption of enterprises, and fail to achieve recycling, etc., to achieve recycling and improve waste heat The effect of utilization

Pending Publication Date: 2021-04-06
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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Problems solved by technology

A large amount of low-temperature waste heat will be generated in the coking production process. At present, a large amount of low-temperature waste heat has not yet been recycled, but is discharged into the environment in various forms, which not only causes environmental pollution, but also causes a great waste of low-temperature waste heat resources. Increased energy consumption of the business

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  • Low-grade waste heat recovery system and process of coking production system

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Embodiment Construction

[0025] The working principle of the low-grade waste heat recovery system of a coking production system described in the present invention is:

[0026] 1) Indirect heat exchange between the condensed water in the crude benzene distillation unit and the deoxygenated return water, increase the temperature of the deoxygenated return water, save the heating steam of the deaerator, and recover the waste heat of the condensed water in the crude benzene distillation unit;

[0027] 2) The flash steam of the crude benzene distillation unit is sent to the low-pressure steam pipe network in the factory area (not limited to this method), and the waste heat of the flash steam of the crude benzene distillation unit is recovered;

[0028] 3) Indirect heat exchange between the blowdown water of the continuous blowdown expander and the deoxygenated backwater can increase the temperature of the deoxygenated backwater, save the heating steam of the deaerator, and recover the waste heat of the blow...

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Abstract

The invention relates to a low-grade waste heat recovery system and process of a coking production system. The coking production system comprises a coke dry quenching boiler, a steam extraction and condensing steam turbine, a condenser, a condensate pump, a dynamo, a crude benzene distillation unit, a deaerator, a deoxidizing feed pump, a demineralized water tank, a demineralized water station, a boiler feed pump, a continuous blowdown expander, a blowdown pump and a coke dry quenching device water seal tank; and the low-grade waste heat recovery system comprises a first-stage water-water heat exchanger and a second-stage water-water heat exchanger. By means of the low-grade waste heat recovery system and process, low-grade waste heat of condensed water and flash steam of the crude benzene distillation unit, continuous blowdown water and secondary steam of the coke dry quenching boiler and the like in the coking production process can be effectively recycled, and the system is simple in composition, and operation and control are convenient.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery, in particular to a recovery system and process for low-grade waste heat such as condensed water and flash steam of a crude benzene distillation unit in a coking production system, continuous blowdown water from a CDQ boiler, and secondary steam. Background technique [0002] my country requires that the utilization rate of waste heat of medium and low grades should reach 80% by 2020. A large amount of low-temperature waste heat will be generated in the coking production process. At present, a large amount of low-temperature waste heat has not yet been recycled, but is discharged into the environment in various forms, which not only causes environmental pollution, but also causes a great waste of low-temperature waste heat resources. Increased energy consumption of the enterprise. [0003] Aiming at the problems of low-temperature waste heat in the coking production process, such as l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B1/18F22B31/08F22B33/18F22B37/26F22D1/00F22D1/50F22D11/06F22G1/00
CPCF22B1/18F22B31/08F22B33/18F22B37/26F22D1/003F22D1/50F22D11/06F22G1/00
Inventor 李令新李桦金基浩逄俊杰周维师
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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