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Low-heat-value sludge bubbling type internal circulating fluidized bed incinerator capable of achieving self-sustaining burning

A self-sustaining incineration and incinerator technology, which is applied in fluidized bed combustion equipment, incinerators, combustion methods, etc., can solve problems such as difficult to achieve self-sustaining combustion, and achieve the effects of easy temperature stability, small supply, and uniform air distribution

Pending Publication Date: 2020-04-03
DALIAN RINO GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But even if the sludge is dried to a moisture content of about 20%, the average calorific value of sludge in our country is only 7000~8000kj / kg, which can just meet the theoretical requirements of self-sustaining combustion of sludge. It is difficult to achieve self-sustaining combustion by adding auxiliary fuel

Method used

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  • Low-heat-value sludge bubbling type internal circulating fluidized bed incinerator capable of achieving self-sustaining burning
  • Low-heat-value sludge bubbling type internal circulating fluidized bed incinerator capable of achieving self-sustaining burning
  • Low-heat-value sludge bubbling type internal circulating fluidized bed incinerator capable of achieving self-sustaining burning

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A bubbling internal circulating fluidized bed incinerator capable of self-sustaining incineration of low calorific value sludge, such as figure 1 As shown, the bottom of the furnace hall is equipped with a water-cooled air distribution plate 2, and an air chamber 3 is provided under the water-cooled air distribution plate 2. The air chamber 3 is connected with the igniter 4, and the slag discharge pipe 5 passes through the air chamber from the water-cooled air distribution plate 2. 3 is connected to the vibrating slag discharger 6 outside the furnace hall. The furnace hall is arranged vertically and is divided into dense phase area 101, dilute phase area 102 and transition area 103 from bottom to top. The air chamber 3 has a primary air duct connected to the primary fan 7, and the dense phase area of ​​the furnace hall has a secondary air The pipe is connected with the secondary blower 8.

Embodiment 2

[0034] incinerator such as figure 2 As shown, on the basis of Example 1, the top opening of the furnace body is connected to the cyclone dust collector 9, and the outlet flue of the cyclone dust collector is provided with an air distribution chamber 10 and a gas-solid separator 11 for secondary purification of smoke and dust. The bubbling internal circulating fluidized bed incinerator for self-sustained incineration of low calorific value sludge also includes a dry sludge storage bin 12 connected to the furnace body. The dry sludge storage bin 12 is a cylindrical container with a cone at the bottom. At the discharge port of the cone, there is a feeder 14 that can adjust the amount of dry sludge. The front end of the feeder has a sowing wind. When adding fuel to the furnace body, the feeder blows the sowing air into the furnace at the same time. The feeder is a frequency conversion screw feeder 13 with a sowing wind. Dosing.

[0035]The furnace hall is vertically arranged, a...

Embodiment 3

[0038] On the basis of embodiment 1 or 2, such as image 3 As shown, the upper and lower sides of the water-cooled air distribution plate 2 at the bottom of the furnace hall are covered with refractory materials to reduce the heat absorption of the water-cooled air distribution plate 2 during the ignition process. The water-cooled air distribution plate 2 consists of uniformly arranged hoods 201 ( Figure 4 ) and a plurality of water-cooling tubes 203 arranged in parallel, the air cap opening 202 is arranged in two or more layers, and the opening has a certain downward angle to ensure uniform air distribution and no backflow of bed materials; the air chamber 3 is a relatively large The large space is used to eliminate the pressure fluctuation of the primary fan 7 and ensure the stable operation of the fluidized bed.

[0039] The slag discharge pipe 5 is provided with a slag discharge port in the middle of the water-cooled air distribution plate 2. The slag discharge pipe 5 pa...

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Abstract

The invention provides a low-heat-value sludge bubbling type internal circulating fluidized bed incinerator capable of achieving self-sustaining burning. In order to achieve the purpose, the hearth bottom of the bubbling type internal circulating fluidized bed incinerator is provided with a water-cooled air distributing plate, and the lower portion of the water-cooled air distributing plate is provided with an air chamber; the air chamber is connected with an igniter; and a slag discharging pipe is connected to a slag discharging device outside a furnace from the water-cooled air distributingplate through the air chamber. A hearth is arranged in the longitudinal direction, and is divided into a dense phase area, a dilute phase area and a transition area from bottom to top, and the functions of dry sludge low-temperature gasification, high-temperature combustion, fuel internal circulation and the like are realized respectively. The air chamber is provided with a primary air air hose tobe connected with a primary draught fan; the dense phase area of the hearth is provided with a secondary air air hose to be connected with a secondary draught fan; the top of a furnace body is provided with an opening to be connected with a cyclone dust collector; and a discharge flue of the cyclone dust collector is sequentially provided with an air distributing chamber and a dust and fume secondary purification gas-solid separator. The low-heat-value sludge bubbling type internal circulating fluidized bed incinerator capable of achieving self-sustaining burning is simple in structure, and self-sustaining burning can be achieved without adding auxiliary fuel.

Description

Technical field: [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a fluidized bed incinerator. [0002] technical background: [0003] With the increasingly acute urbanization process, the urban sludge problem has become a social problem that the public cares about and the government departments are under great pressure. The treatment of sludge reduction, stabilization, harmlessness and resource utilization is the need to achieve sustainable development and environmental protection. [0004] Among the existing sludge treatment technologies, the main methods used are: sludge landfill, composting for agriculture, anaerobic digestion, sludge incineration and other methods. [0005] Incineration can fully burn the combustible components in the sludge at high temperature, and finally become stable ash. The incineration method has the advantages of volume reduction, high weight reduction rate, fast processing speed, thorough ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G5/027F23G5/16F23G5/30F23G5/44F23G5/50F23G7/00F23C10/14F23C10/20
CPCF23C10/14F23C10/20F23G5/027F23G5/16F23G5/30F23G5/44F23G5/50F23G7/001
Inventor 张赜陈双荣谭广芸
Owner DALIAN RINO GROUP
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