CN102213490A

CN102213490A - Heat carrier boiler for burning urban semidrying sludge

Info

Publication number: CN102213490A
Application number: CN2011101218236A
Authority: CN
Inventors: 毛军华; 林敏�
Original assignee: Wuxi Huaguang Boiler Co Ltd
Current assignee: Wuxi Huaguang Boiler Co Ltd
Priority date: 2011-05-12
Filing date: 2011-05-12
Publication date: 2011-10-12

Abstract

The invention provides a heat carrier boiler for burning urban semidrying sludge. Any auxiliary fuel is not required to be added; the sludge can be burned depending on the heat of the sludge; the resource utilization is high; the boiler comprises a furnace, an upper coal economizer, a lower coal economizer, an upper preheater and a lower preheater; the lower part of the furnace is provided with a primary air inlet device and a slag tapping tube; and the upper part of the furnace is sequentially communicated with the upper coal economizer, the upper preheater, the lower coal economizer and the lower preheater. The boiler is characterized in that the furnace is a heat-insulation furnace; the furnace is provided with an entrance of a limestone adding device and an entrance of a quartz sand adding device which are communicated with the outside; a screw feeder is communicated with the interior of the furnace; pipelines of the lower coal economizer and the upper coal economizer are filled with heat conduction oil; the heat conduction oil is connected with the interior of a semidrying sludge drying device; and the exit of the semidrying sludge drying device is communicated with the screw feeder.

Description

Use the thermal medium boiler of city half-driedization mud

Technical field

The present invention relates to the technical field of boiler structure, be specially the thermal medium boiler that uses city half-driedization mud.

Background technology

Municipal sludge is meant solid-state, the semisolid discarded object that city domestic sewage and trade effluent produce in water treatment procedure, it mainly is made of solid residue and water.The mud that municipal sewage produces contains bacterium and virus, and usually with foul gas, the mud that trade effluent produces then has nitrogen, sulphur, chlorine and heavy metal contaminants, these pollutants that are retained in the mud are " the most malicious elite " in the sewage, simple landfill makes them fully expose, through rain erosion and seepage, meeting is the polluted underground water environment to some extent.

The method of disposal of mud is the row of mainly containing sea, landfill, agricultural and burning etc. at present.Plant method of disposal with first three and compare, incineration disposal has the remarkable advantage of minimizing, innoxious and resource.Remaining volume has only 10% of mechanical dehydration sludge volume after the sludge incineration; All germs, pathogen in the burning process are all thoroughly killed, poisonous and hazardous organic matter is decomposed by exhaustive oxidation, the stability of heavy metal improves greatly, and sludge incineration can also utilize the calorific value of mud self to come dewatered sludge, and heat is recycling in the realization sludge handling process.Ash after the sludge incineration can be used as building material, betterment of land agent even adsorbent and uses after suitable physics and chemical treatment.

Existing sludge incineration technology all need add auxiliary fuel in burning process, it also needs the consumption of auxiliary fuel when handling mud, and resource utilization is not high.

Summary of the invention

At the problems referred to above, the invention provides the thermal medium boiler that uses city half-driedization mud, it does not need to add any auxiliary fuel, and mud relies on the caloric value of self with regard to sustainable burning, the resource utilization height.

Use the thermal medium boiler of city half-driedization mud, its technical scheme is such: it comprises burner hearth, higher level's economizer, subordinate's economizer, higher level's preheater, subordinate's preheater, the bottom of described burner hearth is provided with the wind air-intake device one time, residue outlet, the top of described burner hearth is communicated with higher level's economizer successively, higher level's preheater, subordinate's economizer, subordinate's preheater, it is characterized in that: described burner hearth is an adiabatic furnace, described burner hearth is opened to be equipped with and is communicated with outside lime stone adding set inlet, quartz sand adding set inlet, screw(-type) feeder leads to described burner hearth inside, described subordinate economizer, in the pipeline of higher level's economizer conduction oil is housed, described conduction oil connects the drying device inside of half-driedization mud, and described screw(-type) feeder is led in the outlet of the drying device of described half-driedization mud.

It is further characterized in that: the lower end of described subordinate economizer is equipped with subordinate's economizer inlet header, the upper end of described subordinate economizer is equipped with subordinate's economizer exit collection case, the lower end of described higher level's economizer is equipped with higher level's economizer inlet header, the upper end of described higher level's economizer is equipped with higher level's economizer exit collection case, the outlet collection case of described subordinate economizer connects the inlet header of described higher level's economizer by pipeline, and the outlet collection case of described higher level's economizer leads to the drying device inside of described half-driedization mud by pipeline.

After adopting structure of the present invention, half-driedization of conduction oil drying aid mud, enter in the burner hearth after the half-driedization mud process conduction oil drying, because burner hearth is an adiabatic furnace, so the temperature in the burner hearth reaches the burning-point of mud, mud independently burns, it does not need to add any auxiliary fuel, mud relies on the caloric value of self with regard to sustainable burning, thereby and conduction oil heat by the heat that sludge incineration produced and mud carried out drying, its resource utilization height.

Description of drawings

Fig. 1 is a front view structural representation of the present invention.

The specific embodiment

See Fig. 1, it comprises burner hearth 1, higher level's economizer 2, subordinate's economizer 4, higher level's preheater 3, subordinate's preheater 5, the bottom of burner hearth 1 is provided with wind air-intake device 7 one time, residue outlet 10, the top of burner hearth 1 is communicated with higher level's economizer 2 successively, higher level's preheater 3, subordinate's economizer 4, subordinate's preheater 5, burner hearth 1 is an adiabatic furnace, burner hearth 1 is provided with secondary wind air-intake device 8, igniter 9 on the bed, burner hearth 1 is opened to be equipped with and is communicated with outside lime stone adding set inlet 14, quartz sand adding set inlet 11, screw(-type) feeder 6 leads to burner hearth 1 inside, subordinate's economizer 4, in the pipeline of higher level's economizer 2 conduction oil is housed, conduction oil connects drying device 15 inside of half-driedization mud, and screw(-type) feeder 6 is led in the outlet of the drying device 15 of half-driedization mud.

The lower end of subordinate's economizer 4 is equipped with subordinate's economizer inlet header 12, the upper end of subordinate's economizer 4 is equipped with subordinate's economizer exit collection case 16, the lower end of higher level's economizer 2 is equipped with higher level's economizer inlet header 17, the upper end of higher level's economizer 2 is equipped with higher level's economizer exit collection case 13, subordinate's economizer exit collection case 16 connects higher level's economizer inlet header 17 by pipeline, and higher level's economizer exit collection case 13 leads to drying device 15 inside of half-driedization mud by pipeline.

Its operation principle is as follows: the drying device 15 inner dry half-driedization mud that flow into half-driedization mud after absorbing heat through subordinate's economizer 4, subordinate's economizer exit collection case 16, higher level's economizer inlet header 17, higher level's economizer 2, higher level's economizer exit collection case 13 successively behind the conduction oil inflow subordinate economizer inlet header 12, after half-driedization mud is dried, be sent in the burner hearth 1 by screw(-type) feeder 6, because burner hearth 1 is an adiabatic furnace, the temperature in the burner hearth reaches the burning-point of mud; By the quartz sand/lime stone of lime stone adding set inlet 14, quartz sand adding set inlet 11 input certain particle size in burner hearth, it is expected as bed one time wind enters burner hearth by a wind air-intake device 7, make the bed material in the stove be in normal fluidized state; Secondary wind enters in the burner hearth from secondary wind air-intake device 8, and half-driedization mud is sent in the burner hearth 1 by screw(-type) feeder 6, and half-driedization mud is gone into processes such as burner hearth 1 back experience heating, drying, pyrolysis, fragmentation and burning.After the half-driedization sludge incineration heat passed to successively higher level's economizer 2, higher level's preheater 3, subordinate's economizer 4, subordinate's preheater 5, cooling back flue gas is discharged boiler, discharged by chimney through the flue gas that meets national discharge index after the processing such as dedusting, desulfurization, the slag after the fuel combustion is discharged boiler by residue outlet 10.

Claims

1. use the thermal medium boiler of city half-driedization mud, it comprises burner hearth, higher level's economizer, subordinate's economizer, higher level's preheater, subordinate's preheater, the bottom of described burner hearth is provided with the wind air-intake device one time, residue outlet, the top of described burner hearth is communicated with higher level's economizer successively, higher level's preheater, subordinate's economizer, subordinate's preheater, it is characterized in that: described burner hearth is an adiabatic furnace, described burner hearth is opened to be equipped with and is communicated with outside lime stone adding set inlet, quartz sand adding set inlet, screw(-type) feeder leads to described burner hearth inside, described subordinate economizer, in the pipeline of higher level's economizer conduction oil is housed, described conduction oil connects the drying device inside of half-driedization mud, and described screw(-type) feeder is led in the outlet of the drying device of described half-driedization mud.

2. the thermal medium boiler that uses city half-driedization mud according to claim 1, it is characterized in that: the lower end of described subordinate economizer is equipped with subordinate's economizer inlet header, the upper end of described subordinate economizer is equipped with subordinate's economizer exit collection case, the lower end of described higher level's economizer is equipped with higher level's economizer inlet header, the upper end of described higher level's economizer is equipped with higher level's economizer exit collection case, the outlet collection case of described subordinate economizer connects the inlet header of described higher level's economizer by pipeline, and the outlet collection case of described higher level's economizer leads to the drying device inside of described half-driedization mud by pipeline.