CN211232888U - Comprehensive treatment box for waste incineration flue gas - Google Patents

Abstract

The utility model relates to a comprehensive treatment box for waste incineration flue gas, comprising a box body, the box body is divided into a secondary combustion chamber, a heat exchange area, a desulfurization and denitrification area and a dust removal and fog removal area which are sequentially connected by a partition plate. The body has a smoke inlet and a smoke outlet, the secondary combustion chamber is communicated with the smoke inlet pipe through the smoke inlet, and the dust and mist removal area is communicated with the outside of the box body through the smoke outlet. The beneficial effects of the utility model are: the utility model provides a comprehensive treatment box for waste incineration flue gas, which cleverly arranges exhaust gas treatment equipment such as a flue gas secondary combustion chamber, a waste heat exchanger, wet desulfurization and denitrification, and wet electrostatic precipitator and demisting. In the box, the waste heat utilization of the flue gas and the exhaust gas treatment are highly integrated in one box, so as to achieve small integration, low wind resistance, material saving and high efficiency.

Description

A comprehensive treatment box for waste incineration flue gas

technical field

The utility model relates to flue gas treatment equipment, in particular to a comprehensive treatment box for waste incineration flue gas.

Background technique

Generally, there are two products of thermal degradation (incineration or pyrolysis) of organic solid waste (such as domestic waste), which are primary flue gas pyrolysis gas and waste residue. The former is the carrier of available resources—energy, and it is also the main carrier of environmental pollutants. Therefore, in the process of organic solid waste treatment, how to do a good job of energy utilization and pollutant control treatment of primary flue gas is the top priority.

At present, the common method is to use the boiler for heat exchange and utilization, and the exhaust gas adopts the conventional semi-dry treatment method of desulfurization and denitrification, activated carbon injection, and bag dust removal (this method is mostly used in the waste grate furnace incineration power generation technology), and there are many equipments in each treatment link. For series separation, the system has large wind resistance, large investment, and occupies a large area, so it is not suitable for small integration.

Utility model content

The technical problem to be solved by the utility model is to provide a comprehensive treatment box for waste incineration flue gas with high integration, small integration and low wind resistance.

The technical solution of the utility model to solve the above technical problems is as follows: a comprehensive treatment box for waste incineration flue gas, comprising a box body, and the box body is divided into a secondary combustion chamber, a heat exchange area, a desulfurization and denitrification area and In the dust removal and fog removal area, the box body has a smoke inlet and a smoke exhaust port, the secondary combustion chamber is communicated with the smoke inlet pipe through the smoke inlet port, and the dust removal and fog removal area is connected with the smoke outlet through the smoke outlet. The outside of the box is communicated.

The beneficial effects of the utility model are as follows: the utility model provides a comprehensive treatment box for waste incineration flue gas, which cleverly arranges exhaust gas treatment equipment such as a second combustion chamber for flue gas, a waste heat exchanger, wet desulfurization and denitrification, and wet electrostatic precipitator and demisting. In the box, the waste heat utilization of the flue gas and the exhaust gas treatment are highly integrated in one box, so as to achieve a small integration. The utility model has the following advantages: 1. no air duct connection is required, eliminating system wind resistance and reducing pressure loss; 2. sharing partition walls, saving material investment; 3. sharing refrigerant and cleaning medium, improving efficiency; 4. saving space; Raw flue gas (pyrolysis gas) provides one-stop environmental protection treatment and energy utilization solutions.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the side wall of the secondary combustion chamber is provided with a combustion gun for increasing the temperature of the secondary combustion chamber.

The beneficial effect of adopting the above-mentioned further scheme is that the combustion gun heats the secondary combustion chamber, and the gaseous small molecule pollutants that are not completely oxidized are oxidized in the secondary combustion chamber.

Further, it also includes a blower, the side wall of the secondary combustion chamber also has a secondary air duct, the blower is fixed in the secondary air duct, and is used for introducing air into the secondary combustion chamber.

The beneficial effects of adopting the above-mentioned further scheme are: blowing air into the secondary combustion chamber, helping gaseous pollutants to flow forward, and allowing oxygen in the air to enter the box, which is conducive to the oxidation of pollutants.

Further, it also includes a heat exchanger for cooling the flue gas, and the heat exchanger is fixedly connected in the heat exchange area.

The beneficial effect of adopting the above-mentioned further scheme is that the refrigerant in the heat exchanger absorbs the heat of the flue gas, and realizes the cooling of the flue gas and the utilization of the residual heat of the flue gas.

Further, it also includes a spray pipe, the spray pipe is fixedly arranged on the top wall of the desulfurization and denitrification zone, and the spray pipe is connected to a spray water pipeline for feeding the spray water to the desulfurization and denitrification zone, The bottom wall of the box body has a water outlet.

The beneficial effects of adopting the above-mentioned further scheme are: adopting wet desulfurization and denitrification, the wet desulfurization and denitrification technology is relatively mature, the reaction speed is fast, the production operation is safe and reliable, the occupation volume is small, and it is suitable for small equipment, and at the same time, it can realize the cooling and dust removal of flue gas.

Further, a wet electrostatic precipitator and mist eliminator is also included, and the wet electrostatic precipitator and mist eliminator is fixedly arranged in the dust and mist removal area.

The beneficial effect of adopting the above-mentioned further scheme is that the wet electrostatic precipitator and mist eliminator removes the particles and dust in the flue gas.

Further, it also includes a smoke exhaust fan for extracting the smoke in the box, and the smoke exhaust fan is fixedly arranged in the smoke exhaust port.

The beneficial effect of adopting the above-mentioned further scheme is that the smoke exhaust fan accelerates the flow of the smoke from the smoke inlet to the smoke outlet, and discharges the treated smoke out of the box.

Further, the secondary combustion chamber is arranged at one end of the box body and is divided into an inverted U shape by a first partition plate, the smoke inlet is located at the bottom of one end of the box body, and the smoke inlet is connected to the two chambers. The combustion chamber is communicated with one side close to the end wall of one end of the box body.

The beneficial effects of adopting the above-mentioned further scheme are: the secondary combustion chamber is an inverted U shape, the passage of the secondary combustion chamber is long and the floor area is small, so as to ensure that the flue gas stays in the secondary combustion chamber for a sufficient time, so that the flue gas can be fully oxidized in the secondary combustion chamber Or decompose, and at the same time realize the small integration of waste incineration flue gas comprehensive treatment box.

Further, the heat exchange area, the desulfurization and denitrification area and the dust removal and mist removal area are arranged at the other end of the box body and are arranged in sequence from bottom to top, and one end of the heat exchange area is far away from the secondary combustion chamber One end of the end wall of the box body is connected to one side, the other end of the heat exchange area is connected to the other end of the desulfurization and denitrification area, and one end of the desulfurization and denitrification area is connected to one end of the dust removal and fog removal area. The smoke exhaust port is located on the top wall of the other end of the box body and communicated with the other end of the dust and mist removal area.

The beneficial effect of adopting the above-mentioned further scheme is: the flue gas (or pyrolysis gas) of waste incineration (or pyrolysis) enters the ∩-type secondary combustion chamber, and the burner for the secondary combustion chamber is heated to a high temperature (850°C-1000°C), and the high temperature The flue gas enters from one end of the heat exchange area that is connected to the secondary combustion chamber and placed horizontally, and exchanges heat with the refrigerant (water, heat transfer oil, etc.) , ascending into the desulfurization and denitrification area, desulfurization and denitrification under the action of spray water (lye), further cooling and dust removal, and then bending and ascending into the dust removal and fog removal area.

Description of drawings

FIG. 1 is a schematic structural diagram of a comprehensive treatment box for waste incineration flue gas according to the present invention.

In the accompanying drawings, the list of components represented by each number is as follows:

1. Box, 11, smoke inlet, 12, smoke outlet, 13, first partition, 14, second partition, 15, third partition,

2. Secondary combustion chamber, 21. Burning gun, 22. Hair dryer,

3. Heat exchange area, 31. Heat exchanger,

4. Desulfurization and denitrification area, 41. Spray pipe,

5. Dust removal and fog removal area, 51. Wet electrostatic dust removal and fog removal device,

6. Smoke exhaust fan.

Detailed ways

The principles and features of the present invention are described below, and the examples are only used to explain the present invention, and are not intended to limit the scope of the present invention.

As shown in FIG. 1, the present utility model relates to a comprehensive treatment box for waste incineration flue gas, including a box body 1, which is divided into two combustion chambers 2, a heat exchange area 3, desulfurization and denitrification connected in sequence by a partition plate The box 1 has a smoke inlet 11 and a smoke outlet 12, and the secondary combustion chamber 2 is connected to the smoke inlet pipe through the smoke inlet 11. 5 communicates with the outside of the box body 1 through the smoke exhaust port 12 .

As a further solution of this embodiment, the side wall of the secondary combustion chamber 2 is provided with a combustion gun 21 for increasing the temperature of the secondary combustion chamber 2 .

Specifically, the burning gun 21 is installed on the outer side wall of the box body 1, and the tip of the burning gun 21 extends into the secondary combustion chamber 2 to heat the flue gas in the secondary combustion chamber 2, so that the incompletely oxidized gas in the flue gas is heated. Gaseous molecules can be oxidized at high temperatures.

As a further solution of this embodiment, a blower 22 is also included, the side wall of the secondary combustion chamber 2 also has a secondary air duct, and the blower 22 is fixed in the secondary air duct and is used to send air to the secondary combustion chamber. 2 to let in the air.

As a further solution of this embodiment, a heat exchanger 31 for cooling the flue gas is also included, and the heat exchanger 31 is fixedly connected in the heat exchange zone 3 .

Specifically, the heat exchanger 31 can be a tubular heat exchanger or a plate heat exchanger in the prior art, or other existing heat exchangers, and the heat exchanger 31 has a refrigerant inlet and a refrigerant inlet. The outlet, the refrigerant inlet and the refrigerant outlet are all communicated with the refrigerant pipes outside the box 1 . The refrigerant is water or cooling liquid or other commonly used cooling medium. When the refrigerant is water, the hot water discharged from the outlet of the refrigerant can be supplied to the place where hot water is needed to realize the effective utilization of heat.

As a further solution of this embodiment, a spray pipe 41 is also included. The spray pipe 41 is fixedly arranged on the top wall of the desulfurization and denitrification zone 4. The desulfurization and denitrification zone 4 is fed with spray water, and the bottom wall of the box body 1 has a water outlet.

Specifically, the spray pipe 41 is communicated with an external spray water pipeline, the spray water is lye, and the spray water is the spray water used for wet desulfurization and denitrification in the prior art.

As a further solution of this embodiment, a wet electrostatic precipitator 51 is also included, and the wet electrostatic precipitator 51 is fixedly arranged in the dust and mist removal area 5 .

Specifically, the wet electrostatic precipitator 51 may be a plate-type or tubular wet electrostatic precipitator in the prior art.

As a further solution of this embodiment, a smoke exhaust fan 6 for extracting the smoke in the box body 1 is also included, and the smoke exhaust fan 6 is fixedly arranged in the smoke exhaust port 12 .

As a further solution of this embodiment, the secondary combustion chamber 2 is arranged at one end of the box body 1 and is divided into an inverted U shape by a first partition 13 , and the smoke inlet 11 is located at one end of the box body 1 . At the bottom, the smoke inlet 11 communicates with the side of the secondary combustion chamber 2 close to one end wall of the box body 1 .

Specifically, as shown in FIG. 1 , the secondary combustion chamber 2 is located at the right end of the box body 1 and is in an inverted U shape, the smoke inlet 11 is located at the bottom of the right end of the box body 1 , and the smoke inlet 11 is connected to the secondary combustion chamber 2 . The lower end on the right is connected.

As a further solution of this embodiment, the heat exchange zone 3 , the desulfurization and denitrification zone 4 and the dust removal and mist removal zone 5 are arranged at the other end of the box 1 and are arranged in sequence from bottom to top. One end of the zone 3 is communicated with the secondary combustion chamber 2 , the other end of the heat exchange zone 3 is communicated with the other end of the desulfurization and denitrification zone 4 , and one end of the desulfurization and denitrification zone 4 is communicated with the dust removal and mist removal zone 5 The smoke exhaust port 12 is located on the top wall of the other end of the box body 1 and communicates with the other end of the dust removal and mist removal area 5 .

Specifically, as shown in FIG. 1 , the box 1 is divided into the secondary combustion chamber 2 , the heat exchange area 3 , and the desulfurization and denitrification area 4 by the first partition 13 , the second partition 14 and the third partition 15 . And dust removal and fog removal area 5. The first partition 13 is a vertical flat plate, the bottom end of the first partition 13 is fixedly connected with the bottom wall of one end of the box body 1 , and the smoke inlet 11 is arranged between the first partition plate 13 and the box body 1 . between the end walls. The second partition 14 is an L-shaped plate, one end of which is fixedly connected to the top wall of the box body 1 , and the other end is horizontally arranged in a direction away from the first partition 13 . The third partition 15 is a horizontally arranged plate, one end of which is fixedly connected to the other end wall of the box body 1 , and the third partition 15 is located above the other end of the second partition 14 . A labyrinth channel is formed in the box 1, and the flue gas can pass through the secondary combustion chamber 2, the heat exchange area 3, the desulfurization and denitrification area 4 and the dust removal and fog removal area 5 to complete the treatment of the flue gas without passing through the pipeline. compact.

Specifically, the water discharged from the wet electrostatic precipitator 51 can flow along the third baffle 15 and the second baffle 14 to the water outlet of the bottom wall of the box 1, and the temperature can also be lowered during the flow. And the role of dust removal, thus realizing the sharing of refrigerant and cleaning medium, and improving efficiency. The liquid discharged from the water outlet can be recovered and processed, and then passed into the spray pipe 41 for recycling and reuse.

The flue gas (or pyrolysis gas) of waste incineration (or pyrolysis) enters the ∩-type secondary combustion chamber, and the secondary combustion chamber is heated to a high temperature (850℃-1000℃) with a burner, and the high-temperature flue gas communicates with the secondary combustion chamber and One end of the horizontally placed heat exchange zone enters, exchanges heat with the refrigerant (water, heat transfer oil, etc.), the flue gas temperature is reduced to 150℃-180℃, discharged from the other end of the heat exchange zone, and ascends into the desulfurization and denitrification zone. Desulfurization and denitrification under the action of water (lye), further cooling and dust removal, and then bending and ascending into the dust removal and fog removal area. After dust removal and whitening, the exhaust gas is discharged up to the standard through the exhaust fan.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "horizontal", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated A device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features through an intermediary indirect contact. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (9)

1. The utility model provides a waste incineration flue gas integrated processing case, a serial communication port, includes box (1), box (1) separates into two combustion chambers (2), heat transfer district (3), SOx/NOx control district (4) and dust removal defogging district (5) that communicate in proper order through the baffle, box (1) has into mouth (11) and exhaust port (12), two combustion chambers (2) are passed through enter mouth (11) and advance tobacco pipe way intercommunication, dust removal defogging district (5) are passed through exhaust port (12) with the outside intercommunication of box (1).

2. The waste incineration flue gas comprehensive treatment tank of claim 1, characterized in that the side wall of the secondary combustion chamber (2) is provided with a combustion lance (21) for raising the temperature of the secondary combustion chamber (2).

3. The comprehensive treatment box for waste incineration flue gas as claimed in claim 2, further comprising a blower (22), wherein the side wall of the secondary combustion chamber (2) is further provided with a secondary air duct, and the blower (22) is fixed in the secondary air duct and used for introducing air into the secondary combustion chamber (2).

4. The waste incineration flue gas comprehensive treatment tank according to claim 1, further comprising a heat exchanger (31) for cooling the flue gas, wherein the heat exchanger (31) is fixedly connected in the heat exchange area (3).

5. The waste incineration flue gas comprehensive treatment tank of claim 1, further comprising a spray pipe (41), wherein the spray pipe (41) is fixedly arranged on the top wall of the desulfurization and denitrification area (4), the spray pipe (41) is externally connected with a spray water pipeline and used for introducing spray water into the desulfurization and denitrification area (4), and a water outlet is formed in the bottom wall of the tank body (1).

6. The comprehensive treatment box for waste incineration flue gas as claimed in claim 1, further comprising a wet electric dust and mist eliminator (51), wherein the wet electric dust and mist eliminator (51) is fixedly arranged in the dust and mist removing zone (5).

7. The waste incineration flue gas comprehensive treatment tank of claim 1, further comprising a smoke exhaust fan (6) for extracting flue gas in the tank body (1), wherein the smoke exhaust fan (6) is fixedly arranged in the smoke exhaust port (12).

8. The waste incineration flue gas comprehensive treatment tank according to any one of claims 1 to 7, wherein the secondary combustion chamber (2) is arranged at one end of the tank body (1) and is divided into an inverted U shape by a first partition plate (13), the smoke inlet (11) is positioned at the bottom of one end of the tank body (1), and the smoke inlet (11) is communicated with one side of the secondary combustion chamber (2) close to the end wall of one end of the tank body (1).

9. The comprehensive treatment box for waste incineration flue gas as claimed in claim 8, wherein the heat exchange region (3), the desulfurization and denitrification region (4) and the dust and fog removal region (5) are arranged at the other end of the box body (1) and are sequentially arranged from bottom to top, one end of the heat exchange region (3) is communicated with one side of the secondary combustion chamber (2) far away from the end wall of one end of the box body (1), the other end of the heat exchange region (3) is communicated with the other end of the desulfurization and denitrification region (4), one end of the desulfurization and denitrification region (4) is communicated with one end of the dust and fog removal region (5), and the smoke exhaust port (12) is located on the top wall of the other end of the box body (1) and is communicated with the other end of the dust and fog removal region (5).

Images