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Sludge/biomass treatment device and method of coal-fired power plant boiler

A technology for biomass treatment and coal-fired power plants, applied in combustion methods, solid fuel pretreatment, biofuels, etc., can solve the problems of large investment, many equipment, and high operating risks, and prevent odor generation and leakage , Prevent natural and explosive effects, improve processing efficiency

Pending Publication Date: 2019-03-26
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key to biomass gasification technology is the biomass gasification furnace system. The total investment of this system is large, the system is complex, and the operation risk is high. At the same time, due to the limitation of combustible gas delivery temperature, certain energy loss will inevitably occur.
The initial investment and operation cost of using biomass energy in the gasification furnace system are relatively high, and the energy utilization is insufficient. At the same time, there are disadvantages such as complex disposal method system, many equipment, and long investment recovery period. It is necessary to develop a new biomass energy. Energy Utilization Technology

Method used

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  • Sludge/biomass treatment device and method of coal-fired power plant boiler
  • Sludge/biomass treatment device and method of coal-fired power plant boiler

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Experimental program
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Effect test

Embodiment 1

[0034] A sludge / biomass treatment device for a coal-fired power plant boiler, such as figure 1 As shown, it includes dry carbonization and conveying integrated equipment 1, feeding device 2, pre-drying device 3, storage tank 4, conveying device 5, powder discharger 6, sludge / biomass burner 7, porous disc 8, furnace Smoke fan 9, steel ball 10, boiler furnace 11, air preheater 12, OFA burner 13, SOFA burner 14 and main burner 15;

[0035]The dry carbonization conveying integrated equipment 1 includes a rotating housing 101 and a rotating drive motor 102 arranged outside the rotating housing 101; the rotating housing 101 is in the shape of a hollow cylinder, and the rotary and sealed connection of the input end adopts a screw conveyor. The conveying device 5 of the feeder, the output end is rotated and sealed to connect the powder discharge machine 6 inlets; a number of steel balls 10 are arranged in the rotating housing 101; the inlet of the rotating housing 101 is connected wit...

Embodiment 2

[0047] A method for treating sludge / biomass of a coal-fired power station boiler, comprising the following steps,

[0048] a. Close the outlet of the storage tank 4, add the wet sludge / biomass into the pre-drying device 3 through the feeding device 2, and take the low-temperature furnace smoke upstream of the outlet flue of the air preheater 12 and send it to the inlet of the pre-drying device 3 , the wet sludge / biomass is dried and evaporated by the low-temperature furnace smoke, and the pre-dried low-temperature furnace smoke carries water vapor into the downstream of the outlet flue of the air preheater 12, and the pre-dried sludge / biomass is stored in the storage Inside tank 4;

[0049] b. When the amount of sludge / biomass stored in the storage tank 4 reaches the upper limit of the storable amount, the feeding device 2 is closed, and the sludge / biomass stored in the storage tank 4 is sent to the integrated drying and carbonization conveying equipment 1, at the same time, ...

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Abstract

The invention relates to the field of sludge treatment and biomass utilization based on a coal-fired power plant boiler and provides a sludge / biomass treatment device and method of the coal-fired power plant boiler. The device comprises a feeding device, a storage tank, a drying and carbonizing and conveying integrated apparatus, a mill exhauster and a sludge / biomass burner which are sequentiallyconnected; a cylinderical pre-drying device is arranged above the interior of the storage tank, the upper end of the pre-drying device communicates with the feeding device and the lower end of the pre-drying device communicates with the storage tank; the upper part of the pre-drying device is connected with an upstream of an outlet flue of an air pre-heater of the coal-fired power plant boiler through a pipeline, and the upper part of the storage tank is connected with a downstream of the outlet flue of the air pre-heater through the pipeline; a plurality of steel balls are arranged in the drying and carbonizing and conveying integrated apparatus, and an inlet of the drying and carbonizing and conveying integrated apparatus is connected with an inlet flue of the air pre-heater through thepipeline; the sludge / biomass burner is arranged on a boiler furnace side wall or four corners of the coal-fired power plant boiler and is located in the same burning area of the boiler furnace as an OFA burner of the coal-fired power plant boiler.

Description

technical field [0001] The invention relates to the field of sludge disposal and biomass utilization based on coal-fired power plant boilers, in particular to a sludge / biomass treatment device and method for coal-fired power plant boilers. Background technique [0002] The treatment and disposal of sludge from urban sewage plants has become a serious problem for many sewage treatment plants. Since the sludge produced with sewage output contains a large amount of harmful substances, bacteria, parasite eggs, pathogenic microorganisms, etc., the existing sludge treatment and disposal technologies, such as sludge composting for agriculture, landfill, sea reclamation and incineration, etc. It is difficult to solve the sludge problem well. Sludge disposal needs to meet the requirements of "reduction, harmlessness, and resource utilization". At present, the typical technical route of sludge drying coupling power generation is: indirect drying of wet sludge with saturated steam + ...

Claims

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Application Information

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IPC IPC(8): F23B40/00F23B80/02F23B90/06F23K1/00F23K3/00F23G7/00C10B53/00C10B53/02C10B57/10
CPCF23B40/00F23B80/02F23B90/06F23G7/001F23K1/00F23K3/00C10B53/00C10B53/02C10B57/10F23K2203/202F23K2201/20F23K2201/10Y02P20/129Y02E50/10
Inventor 周虹光严万军吴庆龙王岩陈煜敬小磊房凡严响林白鹏
Owner XIAN THERMAL POWER RES INST CO LTD
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