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System and method for drying sludge through waste heat of gas turbine

A gas turbine and sludge technology, applied in dewatering/drying/concentrating sludge treatment, steam application, mechanical equipment, etc., can solve problems such as energy waste, environmental thermal pollution, etc., and achieve convenient transportation, large drying capacity, and failure rate. low effect

Active Publication Date: 2015-04-01
凤阳县经济发展投资有限公司
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AI Technical Summary

Problems solved by technology

Although the gas-steam combined cycle combined with the extraction and condensing turbine can achieve an energy utilization rate of over 70%, but the exhaust gas temperature of the waste heat boiler matched with the gas turbine is generally as high as 120°C. Such low-temperature waste heat resources are difficult to use and can only be discharged. into the atmosphere, not only causing energy waste, but also causing environmental thermal pollution problems

Method used

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  • System and method for drying sludge through waste heat of gas turbine

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] see figure 1 , the present invention mainly includes a gas turbine 1, a waste heat boiler 4, a steam turbine 36, an internal heat type fluidized bed dryer 32, a spray tower 15, an air heater 8, and the like.

[0038] The gas turbine 1 is connected to the generator 35, the flue gas outlet of the gas turbine 1 is connected to the waste heat boiler 4 through the flue 2, the waste heat boiler 4 is equipped with a steam generator 3 and a water heater 5, and is connected to the exhaust pipe 6, and the waste heat boiler 4 The steam outlet is connected with the steam turbine 36, the steam turbine 36 is connected with the generator 35, the steam extraction pipe 33 of the steam turbine 36 is connected with the inlet of the heating surface pipe 31 of the internal heating type fluidized bed dryer 32, and the exhaust port of the steam turbi...

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Abstract

The invention provides a system and a method for drying sludge through the waste heat of a gas turbine. The gas turbine is connected with a generator; a flue gas outlet of the gas turbine is communicated with a waste heat boiler; a steam outlet of the waste heat boiler is communicated with a steam turbine; the steam turbine is connected with the generator; a steam extraction pipe of the steam turbine is communicated with an inlet of a heated surface pipe of an internal thermal type fluidized bed dryer; an air outlet of an air heater is communicated with an air inlet of the internal thermal type fluidized bed dryer; wet sludge enters the internal thermal type fluidized bed dryer through a wet sludge pipe, flows outside the heated surface pipe, is dried and then is discharged into a dry sludge pipe from a discharging hole. Steam is produced through the flue gas waste heat of the gas turbine to push a steam turbine generator set to generate power, and the waste heat of the steam turbine is taken as a heat source for drying the sludge, so that gradient energy utilization is realized, the heat efficiency is high, and a peculiar smell is not discharged; the fluidization air of the fluidized bed dryer is preheated by hot water, so that the energy utilization rate is further improved, and the environmental problems of groundwater pollution and the like caused by sludge burying and soil utilization are effectively solved.

Description

technical field [0001] The invention relates to the fields of waste heat recovery and sludge drying, in particular to a system and method for drying sludge by utilizing the waste heat of a gas turbine. Background technique [0002] (1) Output of sewage sludge and its hazards [0003] With the rapid advancement of urbanization, China's sewage treatment industry has developed rapidly, the sewage treatment capacity and treatment rate have increased rapidly, and the output of sewage sludge has increased rapidly. By the end of 2009, 1,992 urban sewage treatment plants had been put into operation in China, treating 28 billion cubic meters of sewage 3 , producing about 20.05 million tons of sludge with a moisture content of 80%. With the increase of the level of urbanization and the amount of sewage treatment, the amount of sludge will soon exceed 30 million tons. The composition and chemical properties of sludge are complex, including organic matter, plant nutrients, etc., as w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12F01K17/06F01K27/00
Inventor 何秀锦钱瑞林
Owner 凤阳县经济发展投资有限公司
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