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Municipal sludge treatment method and heat pump and solar energy coupling system for implementing method

A technology of municipal sludge and treatment method, applied in the field of heat pump-solar coupling system, can solve the problems of increased transportation cost, extrusion, large stacking area, etc., and achieve the effect of significant economic value

Inactive Publication Date: 2016-10-12
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sludge that has not been properly treated will cause secondary pollution to the environment when it enters the environment. The high moisture content of sludge will cause a series of problems such as increased transportation costs, large stacking area, and squeezed landfill storage capacity.

Method used

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  • Municipal sludge treatment method and heat pump and solar energy coupling system for implementing method

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Experimental program
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Effect test

Embodiment 1

[0059] A municipal sludge treatment method, comprising the following steps:

[0060] Take the municipal sludge and put it in the drying box;

[0061] The heat collected by the sewage source heat pump and the waste gas generated during the sewage treatment process are heated by the heat collected by the sun through the Fresnel lens, and then the heat collected by the air source heat pump and the heat collected by the solar vacuum tube are introduced into the drying box for sludge Dehydration and drying;

[0062] The sludge is dried to a water content of 68%, and fermented at room temperature in a closed environment for 35 days to obtain fertilizer.

Embodiment 2

[0064] A municipal sludge treatment method, comprising the following steps:

[0065] Take the municipal sludge and put it in the drying box;

[0066] After the sewage is treated by the centrifugal sewage heat exchanger, the sewage source heat pump is used to collect heat, and the collected heat is passed into the drying box through the heat pipe;

[0067] The Fresnel lens gathers the heat collected by sunlight to heat the exhaust gas collected by the gas collection device, and the heated exhaust gas is collected by the air source heat pump and passed into the drying box through the heat pipe;

[0068] The heat collected by the solar vacuum tube is introduced into the drying oven through the heat conduction tube;

[0069] The drying box is used to dehydrate and dry the sludge in it by controlling the heat from different sources;

[0070] The sludge was dried to a water content of 70%, and the fertilizer obtained in Example 1 was added in an amount of 1% of the weight of the s...

Embodiment 3

[0072] A municipal sludge treatment method, comprising the following steps:

[0073] Take the municipal sludge and put it in the drying box;

[0074] After the sewage is treated by the centrifugal sewage heat exchanger, the sewage source heat pump is used to collect heat, and the collected heat is passed into the drying box;

[0075] The Fresnel lens gathers the heat collected by sunlight to heat the exhaust gas collected by the gas collection device, and the heated exhaust gas is collected by the air source heat pump and passed into the drying box;

[0076] The heat collected by the solar vacuum tube is introduced into the drying oven;

[0077] Control heat from different sources for sludge dehydration and drying;

[0078] The sludge is dried to a water content of 72%, and the fertilizer obtained in Example 1 is added in an amount of 1% of the sludge weight. After mixing, put it into the first fermentation bin and ferment at room temperature for 15 days, and then the first ...

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Abstract

The invention relates to the field of municipal sludge drying, in particular to a municipal sludge treatment method and a heat pump and solar energy coupling system for implementing the method. The municipal sludge treatment method comprises the steps that municipal sludge is dried, wherein heat used for drying comes from heat, collected by a wastewater source heat pump, of wastewater, heat collected by a gas source heat pump after waste gas generated in the wastewater treatment process is heated with solar energy and heat collected by solar vacuum pipes; the sludge is dried until the water content is 68-72%, closed fermentation is carried out, and fertilizer is obtained. The invention further provides the heat pump and solar energy coupling system for implementing the method. According to the municipal sludge treatment method and the heat pump and solar energy coupling system for implementing the method, energy is generated with the resources in a wastewater plant and solar energy, dried sludge is composted and turned into wealth, the obtained fertilizer is inorganic fertilizer and can be widely applied, and remarkable economic value is achieved.

Description

technical field [0001] The invention relates to the field of municipal sludge drying, in particular to a municipal sludge treatment method and a heat pump-solar coupling system implementing the method. Background technique [0002] By the end of 2014, a total of 3,717 sewage treatment plants had been built in cities and counties (towns for short) across the country, with a sewage treatment capacity of 157 million cubic meters per day, an increase of about 8 million cubic meters per day compared with 2013. The amount of sludge as a by-product of sewage treatment is also increasing sharply. According to statistics, the current annual output in my country is as high as 40 million tons (generally above 98% in terms of water content), and about 80% of the sludge has not been properly treated. Sludge that has not been properly treated will cause secondary pollution to the environment when it enters the environment. The high moisture content of sludge will cause a series of problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/12C05F7/00C05F17/00C05F17/02F24J2/08F24J2/46F25B30/06F24S23/30
CPCC02F11/00C02F11/12C05F7/00C05F17/00C05F17/90F25B30/06F24S23/31F24S80/00Y02E10/40Y02W10/37Y02W30/40Y02P20/129Y02P20/133Y02A40/20
Inventor 王家乐陈威周传辉汪辉黄一凡许钰彬王偌楠朱莹徐晨翱周航
Owner WUHAN UNIV OF SCI & TECH
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