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Waste incineration plant coupled sludge low-temperature drying treatment system

A waste incineration and disposal system technology, applied in dehydration/drying/concentrated sludge treatment, refrigeration and liquefaction, chemical instruments and methods, etc., can solve problems such as high energy consumption, overheating, and increased burden on the tail gas treatment system, and achieve improvement Safety, low temperature, and environmental friendliness in the factory area

Active Publication Date: 2021-03-19
SHANGHAI SUS ENVIRONMENT
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This drying method consumes a lot of energy, and the surface of the dried mud is easily overheated, which increases the safety hazards of combustible dust explosion and spontaneous combustion. In addition, a large amount of malodorous gas will be released during the high-temperature drying process, which will increase the burden on the exhaust gas treatment system.

Method used

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  • Waste incineration plant coupled sludge low-temperature drying treatment system
  • Waste incineration plant coupled sludge low-temperature drying treatment system

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Embodiment Construction

[0018] Such as figure 1 As shown, taking a 100t / d sludge drying project (drying sludge with a moisture content of 80% to 30%) as an example, the specific implementation of the present invention is further described. The steam generated by the waste incineration boiler 1 enters the steam turbine 2, and uses the low-pressure extraction steam (0.7Mpa, 255°C) of the steam turbine 2 as a high-temperature driving heat source to heat the generator 14. Enter the deaerator 5 for recycling. The steam generated by the generator 14 enters the condenser 10 as a power heat source for heating the dry air, and the condensed water entering the evaporator 12 after throttling is used to absorb low-grade heat energy in the humid air, and is bypassed from the condenser 3 through the circulating water pump 4 The feed water (0.8MPa) enters the absorber 13 to absorb heat and heat up, and the 27t / h bypass feed water is heated from 38°C to 75°C, and enters the deaerator 5 for recycling. 4. 17t / h of w...

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Abstract

The invention provides a waste incineration plant coupled sludge low-temperature drying treatment system, which comprises a waste incineration power generation system, a belt type drying machine, a first-class absorption heat pump, a circulating fan and a sludge conveyor. A steam turbine is used for low-pressure steam extraction to drive a first-class absorption heat pump, heat in the sludge condensation and dehumidification process is recycled while low-temperature sludge drying is achieved, and the dried sludge is conveyed to an incinerator to be incinerated cooperatively. The system is safe, reliable, free of odor emission in the drying process and environmentally friendly in a plant area, and the steam consumption in the drying process can be reduced by 0.53 t / t wet sludge (the moisture content is 80%); therefore, the deep reduction, harmlessness and resource utilization of the sludge are achieved while the safety, environmental friendliness and economical efficiency of a waste incineration plant are improved.

Description

technical field [0001] The invention relates to the technical fields of urban waste incineration technology and sludge disposal, in particular to a waste incineration plant coupled sludge low-temperature drying treatment system. Background technique [0002] As a secondary pollutant produced by sewage treatment, sludge is rich in microorganisms, refractory organic matter, salts, heavy metals and other harmful substances. If it is not treated harmlessly, it will pose a serious threat to the living environment. Due to the high moisture content and bulky volume of sludge, traditional sludge disposal methods such as landfill and composting can no longer meet the domestic land demand. The use of sludge pre-drying + incineration + ash transportation has become one of the mainstream technical routes for sludge disposal. [0003] Separate drying and incineration of sludge requires the construction of multiple systems such as incineration and tail gas treatment. The construction and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/13F22D1/50F22D1/32F25B30/04F28B9/08
CPCC02F11/13F22D1/50F22D1/32F25B30/04F28B9/08Y02E20/12
Inventor 龙吉生乔旭李建平王玮严浩文郝章峰余国涛单福朋张坡袁旗斌
Owner SHANGHAI SUS ENVIRONMENT
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