CN107830525A - A kind of rubbish cooperates with incineration treatment method and device with semi-dry sludge - Google Patents

Abstract

The invention discloses a method and device for cooperating incineration of garbage and semi-dry sludge, comprising a furnace and a grate therein, a garbage delivery unit for delivering garbage to the grate, and a garbage delivery unit for delivering wet sludge to The furnace is back arched and thrown into the wet sludge distribution unit in the furnace; the flue gas outlet of the furnace is connected to the waste heat boiler, deacidification reaction tower, and bag filter in sequence through pipelines; the flue gas in the furnace passes through the waste heat boiler and deacidification reaction tower , bag filter, and then enter the chimney through the induced draft fan and discharge into the atmosphere; the water in the waste heat boiler is heated to generate steam, which drives the turbine generator to generate electricity; the screw conveyor transports the wet sludge in the sludge bin to the furnace Arch, the wet sludge is scattered on the grate in the furnace under the action of gravity. In the process of simultaneously incinerating garbage and semi-dry sludge, the device can recycle heat energy to generate electric energy, and realize resource utilization of sludge disposal.

Description

Method and device for co-incineration of garbage and semi-dry sludge

technical field

The invention relates to garbage incineration, in particular to a method and device for co-incinerating garbage and semi-dry sludge.

Background technique

Conventional disposal methods of municipal solid waste include landfill, composting and incineration for power generation. The landfill method has been widely used in waste disposal due to its advantages of low cost, mature technology and convenient management. However, the landfilled garbage has not been harmlessly treated, and a large number of bacteria and viruses remain. The seepage of the garbage will pollute and destroy soil and groundwater resources, directly threatening environmental safety and public health.

Contents of the invention

The object of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art, and provide a method and device for co-incineration of garbage and semi-dried sludge. Realize the purpose of "reduction, stabilization and harmlessness" in sludge treatment.

The present invention realizes through following technical scheme:

A garbage and semi-dry sludge co-incineration treatment device, including a furnace and a fire grate 6 inside, a garbage delivery unit for delivering garbage to the fire grate 6, and a garbage delivery unit for delivering wet sludge to the back arch of the furnace and Wet sludge distribution unit thrown into the furnace;

The flue gas outlet of the furnace is connected to the waste heat boiler 8, the deacidification reaction tower 12, and the bag filter 16 in turn through pipelines; 17 enters the chimney and is discharged into the atmosphere;

The waste heat boiler 8 is connected to the steam turbine generator 11; the water in the waste heat boiler 8 is heated to generate steam, and drives the steam turbine generator 11 to generate electricity;

The wet sludge distribution unit includes a sludge bin 10 and a screw conveyor 9; the screw conveyor 9 transports the wet sludge in the sludge bin 10 to the rear arch of the furnace, and the wet sludge is scattered to the grate in the furnace under the action of gravity 6 on.

At the entrance of the furnace, there is a secondary blower 5 that blows external air into the furnace to promote the secondary combustion of unburned gas in the furnace. In this way, the residence time of the flue gas at 850-900 ° C in the furnace outlet area is prolonged;

The fire grate 6 is sequentially divided into a drying section A, a pyrolysis section B, a fixed carbon burning section C, and a fixed carbon burning section D from top to bottom.

The deacidification reaction tower 12 is also connected with a lime supply bin 14 ; the pipeline between the deacidification reaction tower 12 and the bag filter 16 is also connected with an activated carbon supply bin 15 .

Described rubbish distribution unit comprises rubbish bin 2, grabbing device 3; Grabbing device 3 is used for grabbing the rubbish in rubbish bin 2 and hoisting to feed hopper, and rubbish enters on the fire grate 6 in the furnace by feed hopper;

The fly ash in the lower part of the waste heat boiler 8 , the deacidification reaction tower 12 and the bag filter 16 is collectively collected by the ash bin 13 .

The bottom of the grate 6 is provided with a blower 7, which is used to supply air to the hearth to fully burn the garbage in the hearth furnace; the bottom of the garbage bin 2 is also provided with a leachate collection pool 1 for collecting liquid in the garbage; A slag pool 4 is provided below the fire grate 6 .

The co-incineration treatment method of garbage and semi-dry sludge of the present invention comprises the following steps:

Push the garbage in the feed hopper into the grate 6; the screw conveyor 9 transports the wet sludge in the sludge bin 10 to the rear arch of the furnace, and the wet sludge is scattered on the grate 6 in the furnace under the action of gravity;

Under the action of primary air and furnace radiation, the garbage and wet sludge in the furnace complete the four combustion processes of drying, pyrolysis, fixed carbon combustion and fixed carbon burnout on the grate, and the high-temperature flue gas produced by incineration enters In the waste heat boiler 8, the water in the waste heat boiler 8 is heated to form steam, and the steam drives the turbine generator 11;

Next, the flue gas discharged from the waste heat boiler 8 enters the deacidification reaction tower 12, and after contacting with the slaked lime particles from the lime supply bin 14 for neutralization reaction, the activated carbon from the activated carbon supply bin 15 absorbs the particles entrained in the flue gas. , The flue gas passes through the bag filter 16, and the particles and reactants in the flue gas are finally captured in the bag filter 16, and the flue gas enters the chimney through the induced draft fan 17 and is discharged into the atmosphere.

Compared with the prior art, the present invention has the following advantages and effects:

(1) The invention aims at high-efficiency and low-pollution combustion of garbage and sludge and clean utilization of heat, to achieve "reduction, stabilization, and harmlessness", and the semi-dry sludge temporarily stored in the sludge bin The distribution unit throws it into the furnace, and the high-temperature flue gas in the furnace dries the thrown wet (semi-dry) sludge, and realizes co-incineration with the garbage, which can remove all the moisture and organic matter in the semi-dry sludge, killing It can eliminate all pathogens, reduce the volume of sludge to the greatest extent, and reduce pollutant emissions. The waste incineration power generation system has a complete flue gas treatment system, which can co-process the flue gas generated by sludge incineration, saving investment and operating costs.

(2) In the process of using garbage incineration to dispose of semi-dry sludge, and incinerating garbage and semi-dry sludge at the same time, heat energy can be recovered and utilized to generate electric energy, so as to realize the resource utilization of sludge disposal. The flue gas discharged from the waste heat boiler enters the deacidification reaction tower, and after contacting with the slaked lime particles from the lime supply bin for neutralization reaction, the activated carbon from the activated carbon supply bin absorbs the particulate matter in the flue gas, and the flue gas passes through the bag dust removal The particles and reactants in the flue gas are finally captured in the bag filter, and the flue gas enters the chimney through the induced draft fan and is discharged into the atmosphere.

(3) The slag produced by incineration can be reused as construction raw materials, such as cement, brick and concrete, to protect the environment and realize the resource utilization of sludge disposal;

Based on the above, the present invention has the advantages of simple and easy technical means, good environmental protection effect and high economic benefit, and can be widely applied to incineration of industrial and urban domestic garbage and sludge, and has a wide application prospect.

Description of drawings

Fig. 1 is a schematic structural diagram of the waste and semi-dry sludge co-incineration treatment device of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with specific embodiments.

Example

As shown in Figure 1. The invention discloses a garbage and semi-dry sludge cooperative incineration treatment device, which includes a furnace and a fire grate 6 inside, a garbage distribution unit for distributing garbage to the fire grate 6, and a garbage distribution unit for distributing wet sludge (semi-dry sludge) Dry sludge) is transported to the back arch of the furnace and thrown into the wet sludge distribution unit in the furnace;

The flue gas outlet of the furnace is connected to the waste heat boiler 8, the deacidification reaction tower 12, and the bag filter 16 in turn through pipelines; 17 enters the chimney and is discharged into the atmosphere;

The waste heat boiler 8 is connected to the steam turbine generator 11; the water in the waste heat boiler 8 is heated to generate steam, and drives the steam turbine generator 11 to generate electricity;

The wet sludge distribution unit includes a sludge bin 10 and a screw conveyor 9; the screw conveyor 9 transports the wet sludge in the sludge bin 10 to the rear arch of the furnace, and the wet sludge is scattered to the grate in the furnace under the action of gravity 6 on.

At the entrance of the furnace, there is a secondary blower 5 that blows external air into the furnace to promote the secondary combustion of unburned gas in the furnace. In this way, the residence time of the flue gas at 850-900 ° C in the furnace outlet area is prolonged;

The fire grate 6 is sequentially divided into a drying section A, a pyrolysis section B, a fixed carbon burning section C, and a fixed carbon burning section D from top to bottom.

The high-temperature flue gas in the furnace further dries the wet sludge (semi-dry sludge) thrown into the process. The wet sludge is thrown into the drying section A, and the semi-dry sludge and garbage are co-incinerated.

The deacidification reaction tower 12 is also connected with a lime supply bin 14 ; the pipeline between the deacidification reaction tower 12 and the bag filter 16 is also connected with an activated carbon supply bin 15 .

Described rubbish distribution unit comprises rubbish bin 2, grabbing device 3; Grabbing device 3 is used for grabbing the rubbish in rubbish bin 2 and hoisting to feed hopper, and rubbish enters on the fire grate 6 in the furnace by feed hopper;

The fly ash at the lower part of the waste heat boiler 8, the deacidification reaction tower 12, and the bag filter 16 is collectively collected by the ash bin 13, and the fly ash can be used as building raw materials.

The bottom of the grate 6 is provided with a blower 7, which is used to supply air to the hearth to fully burn the garbage in the hearth furnace; the bottom of the garbage bin 2 is also provided with a leachate collection pool 1 for collecting liquid in the garbage; A slag pool 4 is arranged below the fire grate 6, and the slag can be used as building raw materials.

The co-incineration treatment method of garbage and semi-dry sludge of the present invention can be realized through the following steps:

Push the garbage in the feed hopper into the grate 6; the screw conveyor 9 transports the wet sludge in the sludge bin 10 to the rear arch of the furnace, and the wet sludge is scattered on the grate 6 in the furnace under the action of gravity;

Under the action of primary air and furnace radiation, the garbage and wet sludge in the furnace complete the four combustion processes of drying, pyrolysis, fixed carbon combustion and fixed carbon burnout on the grate, and the high-temperature flue gas produced by incineration enters In the waste heat boiler 8, the water in the waste heat boiler 8 is heated to form steam, and the steam drives the turbine generator 11;

Next, the flue gas discharged from the waste heat boiler 8 enters the deacidification reaction tower 12, and after contacting with the slaked lime particles from the lime supply bin 14 for neutralization reaction, the activated carbon from the activated carbon supply bin 15 absorbs the particles entrained in the flue gas. , The flue gas passes through the bag filter 16, and the particles and reactants in the flue gas are finally captured in the bag filter 16, and the flue gas enters the chimney through the induced draft fan 17 and is discharged into the atmosphere.

As described above, the present invention can be preferably carried out.

The implementation of the present invention is not limited by the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods, and are all included in within the protection scope of the present invention.

Claims (6)

1. A garbage and semi-dry sludge synergistic incineration treatment device, characterized in that: comprising a furnace and a fire grate (6) therein, a garbage delivery unit for distributing garbage to the fire grate (6), for The wet sludge distribution unit that transports the wet sludge to the back arch of the furnace and throws it into the furnace; The flue gas outlet of the furnace is connected to the waste heat boiler (8), the deacidification reaction tower (12), and the bag filter (16) in turn through the pipeline; the flue gas in the furnace passes through the waste heat boiler (8), the deacidification reaction tower (12) , bag filter (16), then enter the chimney through the induced draft fan (17) and discharge into the atmosphere; The waste heat boiler (8) is connected to the steam turbine generator (11); the water in the waste heat boiler (8) is heated to generate steam, and drives the steam turbine generator (11) to generate electricity; The wet sludge distribution unit includes a sludge bin (10) and a screw conveyor (9); the screw conveyor (9) transports the wet sludge in the sludge bin (10) to the rear arch of the furnace, and the wet sludge is transported under the action of gravity. Scatter on the fire grate (6) in the furnace. 2. The garbage and semi-dried sludge co-incineration treatment device according to claim 1, characterized in that: a secondary fan (5) for blowing external air into the furnace is provided at the furnace entrance to promote unburned gas in the furnace. Under the action of back blowing and disturbing flow of the secondary fan (5), the flue gas is entrained with each other, so as to prolong the residence time of the flue gas at 850-900°C in the furnace outlet area; The fire grate (6) is sequentially divided into a drying section A, a pyrolysis section B, a fixed carbon combustion section C, and a fixed carbon burnout section D from top to bottom. 3. according to claim 2 described garbage and semi-dried sludge synergistic incineration treatment device, it is characterized in that: described deacidification reaction tower (12) is also connected with a lime supply bin (14); Described deacidification reaction tower (12) ) and the pipeline between the bag filter (16) are also connected with an activated carbon supply bin (15). 4. According to claim 3, the garbage and semi-dry sludge cooperative incineration treatment device is characterized in that: the garbage distribution unit includes a garbage bin (2) and a grabbing device (3); the grabbing device (3) is used for Grab and hoist the garbage in the garbage bin (2) to the feed hopper, and the garbage enters the grate (6) in the furnace from the feed hopper; The fly ash at the lower part of the waste heat boiler (8), the deacidification reaction tower (12), and the bag filter (16) is uniformly collected by the ash bin (13). 5. According to claim 4, the garbage and semi-dry sludge cooperative incineration treatment device is characterized in that: the bottom of the grate (6) is provided with a blower (7), which is used to supply air to the furnace, so that the hearth furnace The internal garbage is fully burned; the bottom of the garbage bin (2) is also provided with a leachate collection pool (1) for collecting liquid in the garbage; and a slag pool (4) is provided under the fire grate (6). 6. The incineration method of the garbage and semi-dry sludge co-incineration treatment device according to claim 5, characterized in that it comprises the following steps: Push the garbage in the feeding hopper into the grate (6); the screw conveyor (9) transports the wet sludge in the sludge bin (10) to the rear arch of the furnace, and the wet sludge is scattered into the furnace under the action of gravity on the grate (6); Under the action of primary air and furnace radiation, the garbage and wet sludge in the furnace complete the four combustion processes of drying, pyrolysis, fixed carbon combustion and fixed carbon burnout on the grate, and the high-temperature flue gas produced by incineration enters In the waste heat boiler (8), the water in the waste heat boiler (8) is heated to form steam, and the steam drives the turbine generator (11); Next, the flue gas discharged from the waste heat boiler (8) enters the deacidification reaction tower (12), contacts with the slaked lime particles from the lime supply bin (14) for neutralization reaction, and then passes through the activated carbon from the activated carbon supply bin (15). After absorbing the particles entrained in the flue gas, the flue gas passes through the bag filter (16), the particles and reactants in the flue gas are finally captured in the bag filter (16), and the flue gas enters the chimney through the induced draft fan (17) discharged into the atmosphere.