Negative pressure system of garbage bin

Abstract

The utility model discloses a garbage bin negative pressure system, and relates to the technical field of garbage power generation. The garbage bin negative pressure system comprises an air exhaust header pipe communicated with a garbage bin, the air exhaust header pipe is communicated with a primary air opening of an incinerator through a primary air assembly and further communicated with a secondary air opening of the incinerator through an air exhaust branch pipe, and a branch pipe valve and an exhaust fan are sequentially arranged on the air exhaust branch pipe in the direction from the air exhaust header pipe to the secondary air opening. And part of the air exhaust branch pipe is arranged in the incinerator wall of the incinerator. According to the garbage bin negative pressure system provided by the embodiment of the invention, when the primary air demand quantity in the incinerator is small and the air draft quantity of the primary air assembly to the garbage bin is reduced, the interior of the garbage bin can still be kept in a micro-negative pressure state all the time, and odor overflow caused by air pressure rise in the garbage bin is avoided; compared with the prior art, activated carbon does not need to be used for adsorbing odor, the operation cost is reduced, and the risk that the odor overflows to pollute the environment after activated carbon adsorption saturation is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the garbage power generation technical field, in particular to a garbage bin negative pressure system. BACKGROUND

[0002] The garbage incineration power generation is an effective garbage disposal method, which can reduce pollution and save energy, and has significant economic benefits. In the garbage incineration power plant, the garbage bin needs to be kept in a micro negative pressure state to prevent odor overflow, and the micro negative pressure of the garbage bin is mainly maintained by the primary air fan for air extraction from the garbage bin.

[0003] When the garbage incinerator has a small amount of primary air demand, the pressure in the garbage bin will gradually increase, thereby causing the odor in the garbage bin to overflow and pollute the air in the plant area. In order to prevent the odor in the garbage bin from overflowing, at present, a deodorization fan is usually arranged outside the garbage bin to extract air from the garbage bin, so as to keep the garbage bin in a micro negative pressure state, and the air discharged from the deodorization fan is subjected to activated carbon adsorption to reduce or remove the odor.

[0004] However, the air discharged from the deodorization fan also needs to be subjected to activated carbon adsorption, and the activated carbon needs to be replaced frequently, thereby increasing the operation cost, and increasing the risk of odor overflow and environmental pollution after the activated carbon adsorption is saturated. CONTENT OF THE UTILITY MODEL

[0005] The application aims to provide a garbage bin negative pressure system, which solves the problem of frequent replacement of activated carbon for removing odor and increases operation cost.

[0006] The application solves the technical problem by adopting the following technical scheme:

[0007] A garbage bin negative pressure system comprises an air extraction main pipe communicated with a garbage bin, the air extraction main pipe is communicated with a primary air port of an incinerator through a primary air assembly, the air extraction main pipe is also communicated with a secondary air port of the incinerator through an air extraction branch pipe, a branch pipe valve and an air extractor are arranged on the air extraction branch pipe in sequence along the direction from the air extraction main pipe to the secondary air port, and part of the air extraction branch pipe is arranged in a furnace wall of the incinerator.

[0008] Further, a plurality of furnace wall passages are arranged in the furnace wall, and the furnace wall passages form an inner cavity of the air extraction branch pipe.

[0009] Further, a natural air inlet is arranged on the air extraction branch pipe and located between the branch pipe valve and the air extractor, and the natural air inlet is communicated with one end of a natural air valve.

[0010] Further, an outlet end of the air extraction branch pipe is communicated with the secondary air port through a second branch pipe, and a second valve is arranged on the second branch pipe.

[0011] Further, the outlet end of the air extraction branch pipe is communicated with the primary air outlet through a first branch pipe, and a first valve is arranged on the first branch pipe.

[0012] Further, the top of the garbage bin is provided with an air extraction port, and the air extraction main pipe is communicated with the air extraction port.

[0013] Further, the primary air assembly comprises a primary air main pipe, a primary air fan and an air preheater, two ends of the primary air main pipe are respectively communicated with the air extraction main pipe and the primary air outlet, and the primary air fan and the air preheater are arranged on the primary air main pipe.

[0014] Further, the primary air fan is arranged between the primary air main pipe and the air preheater.

[0015] Further, the inlet end and the outlet end of the primary air fan are respectively provided with baffle doors.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The garbage bin negative pressure system provided by the embodiment of the present application, by arranging an air extraction branch pipe between the air extraction main pipe and the secondary air outlet, and arranging a branch pipe valve and an air extractor on the air extraction branch pipe, when the primary air demand in the incinerator is small and the air extraction amount of the primary air assembly on the garbage bin is reduced, the branch pipe valve can be opened and the air extractor can be started to extract and send the gas in the garbage bin to the incinerator through the secondary air outlet, so that the garbage bin always maintains a slight negative pressure state, avoiding the risk of odor overflow caused by the increase of air pressure in the garbage bin; compared with the prior art, the activated carbon adsorption of odor is not needed, the operation cost is reduced, and the risk of odor overflow pollution of the environment after the activated carbon adsorption is saturated is avoided.

[0018] 2. The garbage bin negative pressure system provided by the embodiment of the present application, by arranging part of the air extraction branch pipe in the furnace wall of the incinerator, the furnace wall can be used to preheat the gas in the air extraction branch pipe, the temperature of the gas sent into the incinerator through the air extraction branch pipe can be improved, and energy saving and consumption reduction can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 is a flow chart of the garbage bin negative pressure system provided by the embodiment of the present application;

[0021] Figure 2 is a structural schematic view of the furnace wall passage in the furnace wall.

[0022] Figure label:

[0023] 10-Garbage bin;

[0024] 11-Exhaust manifold;

[0025] 12- Primary air assembly;

[0026] 121-Primary air main pipe; 122-Primary air fan; 123-Air preheater; 124-Damper gate;

[0027] 13-Incinerator;

[0028] 131 - Primary tuyer; 132 - Secondary tuyer; 133 - Furnace wall; 134 - Furnace wall passage;

[0029] 14-Ejection branch pipe;

[0030] 141 - Natural wind inlet;

[0031] 15-Branch valve;

[0032] 16-Exhaust fan;

[0033] 17-Natural draft valve;

[0034] 18-Second branch pipe;

[0035] 19-Second valve;

[0036] 20 - First branch pipe;

[0037] 21-First valve. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0039] In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] See Figure 1 This application provides a negative pressure system for a waste storage bin, including a main exhaust pipe 11 connected to the waste storage bin 10. The main exhaust pipe 11 is connected to the primary air outlet 131 of the incinerator 13 via a primary air assembly 12. The main exhaust pipe 11 is also connected to the secondary air outlet 132 of the incinerator 13 via an exhaust branch pipe 14. A branch valve 15 and an exhaust fan 16 are sequentially provided on the exhaust branch pipe 14 along the direction from the main exhaust pipe 11 to the secondary air outlet 132. A portion of the exhaust branch pipe 14 is located inside the furnace wall 133 of the incinerator 13.

[0042] Under normal circumstances, the branch pipe valve 15 is closed and the primary air assembly 12 is started. The primary air assembly 12 draws gas from the waste bin 10. The gas in the waste bin 10 enters the incinerator 13 as primary air through the exhaust manifold 11, the primary air assembly 12, and the primary air outlet 131. The primary air provides air for waste combustion and plays a role in drying and combustion assistance. During this process, because the gas in the waste bin 10 is continuously drawn out, a slight negative pressure is formed in the waste bin 10 to prevent odor from escaping.

[0043] When the amount of waste in the incinerator 13 is small, the required primary air volume is also small. By controlling the primary air assembly 12 to reduce the primary air extraction volume, the air pressure in the waste bin 10 will increase after a period of time. At this time, the branch pipe valve 15 is opened and the exhaust fan 16 is started. The exhaust fan 16 extracts gas from the waste bin 10. The gas in the waste bin 10 enters the incinerator 13 in sequence through the exhaust main pipe 11, the exhaust branch pipe 14, the branch pipe valve 15, the exhaust fan 16, and the secondary air inlet 132. This not only avoids the air pressure in the waste bin 10 from rising and keeps it in a slightly negative pressure state, but also increases the combustion-supporting gas in the incinerator 13, so that the waste in the furnace can be burned more completely. These combustion-supporting gases can also act as secondary air, enhance the turbulence in the furnace, and prolong the residence time of the flue gas in the furnace and vertical flue of the incinerator 13.

[0044] The negative pressure system for the waste bin provided in this application embodiment involves setting an extraction branch pipe 14 between the main extraction pipe 11 and the secondary air outlet 132, and installing a branch pipe valve 15 and an exhaust fan 16 on the extraction branch pipe 14. When the primary air demand in the incinerator 13 is low and the extraction volume of the primary air assembly 12 to the waste bin 10 is reduced, the branch pipe valve 15 can be opened and the exhaust fan 16 can be started to draw the gas in the waste bin 10 into the incinerator 13 through the secondary air outlet 132, so that the waste bin 10 is always kept in a slightly negative pressure state, avoiding the overflow of odor due to the increase of gas pressure in the waste bin 10. Compared with the prior art, there is no need to use activated carbon to adsorb odors, which reduces operating costs and avoids the risk of odor overflow and environmental pollution after activated carbon adsorption becomes saturated. By setting part of the extraction branch pipe 14 inside the furnace wall of the incinerator 13, the furnace wall can be used to preheat the gas in the extraction branch pipe 14, increasing the temperature of the gas sent into the incinerator 13 through the extraction branch pipe 14, thereby achieving energy saving and consumption reduction.

[0045] In some embodiments, during the construction of the furnace wall 133, several steel pipes may be pre-embedded within it, serving as part of the exhaust branch pipe 14. The steel pipes pre-embedded within the furnace wall 133 may be arranged horizontally, vertically, or obliquely, and the shape of the steel pipes may be straight or curved, etc.

[0046] For example, see Figure 2 The furnace wall 133 has several furnace wall channels 134, which form the inner cavity of the exhaust branch pipe 14. During the construction of the furnace wall 133, holes can be pre-drilled to form the furnace wall channels 134. The furnace wall channels 134 can be arranged horizontally, vertically, or inclined, and their shape can be straight or curved. This structure allows the heat from the furnace wall 133 to be directly transferred to the gas within the furnace wall channels 134, not only realizing the recovery and utilization of waste heat from the furnace wall 133 but also rapidly heating the gas within the furnace wall channels 134, improving the gas heating efficiency.

[0047] In some embodiments, see Figure 1A natural air inlet 141 is provided on the exhaust branch pipe 14 and between the branch pipe valve 15 and the exhaust fan 16. The natural air inlet 141 is connected to one end of the natural air valve 17.

[0048] When in use, the natural wind valve 17 can be closed, the branch pipe valve 15 can be opened, and the exhaust fan 16 can be started. The exhaust fan 16 is used to extract the gas in the garbage bin 10 so as to maintain the garbage bin 10 in a slightly negative pressure state when the primary air demand in the incinerator 13 is small, thus preventing the odor in the garbage bin 10 from overflowing.

[0049] In use, the branch pipe valve 15 can be closed, the natural air valve 17 opened, and the exhaust fan 16 started. The exhaust fan 16 draws air from the external environment, and the air from the external environment enters the incinerator 13 as secondary air through the natural air valve 17, the natural air inlet 141, the exhaust branch pipe 14, the exhaust fan 16, and the secondary air outlet 132. This eliminates the need for an additional secondary air assembly on the incinerator 13 to provide secondary air, reducing manufacturing costs.

[0050] For example, both branch valve 15 and natural ventilation valve 17 are butterfly valves. Of course, branch valve 15 and natural ventilation valve 17 may also include gate valves, stop valves, etc., without specific limitations here.

[0051] In some embodiments, see Figure 1 The outlet end of the exhaust branch pipe 14 is connected to the secondary air outlet 132 through the second branch pipe 18, and the second branch pipe 18 is equipped with a second valve 19. The outlet end of the exhaust branch pipe 14 is connected to the primary air outlet 131 through the first branch pipe 20, and the first branch pipe 20 is equipped with a first valve 21.

[0052] In use, the second valve 19 can be opened and the first valve 21 closed, allowing the gas in the extraction branch pipe 14 to enter the incinerator 13 as secondary air through the second branch pipe 18 and the secondary air inlet 132. Depending on the requirements of different operating conditions, in use, the first valve 21 can also be opened and the second valve 19 closed, allowing the gas in the extraction branch pipe 14 to enter the incinerator 13 as primary air through the first branch pipe 20 and the primary air inlet 131. This can also reduce the output of the air preheater 123 in the primary air assembly 12, reduce the heat loss of the air preheater 123, and increase the gas production of the steam drum.

[0053] In some embodiments, see Figure 1 The top of the garbage bin 10 is equipped with an exhaust port, and the exhaust manifold 11 is connected to the exhaust port. The exhaust port is located at the top of the garbage bin 10, which helps to maintain a slight negative pressure state inside the garbage bin 10, prevents odor from escaping, and also ensures that the gas extracted from the garbage bin 10 is gas with a low temperature after sufficient heat exchange, avoiding the removal of the lower hot air and causing energy loss.

[0054] In some embodiments, seeFigure 1 The primary air assembly 12 includes a primary air main pipe 121, a primary air fan 122, and an air preheater 123. The two ends of the primary air main pipe 121 are connected to the exhaust manifold 11 and the primary air outlet 131, respectively. The primary air fan 122 and the air preheater 123 are both mounted on the primary air main pipe 121. The primary air fan 122 is located between the primary air main pipe 121 and the air preheater 123, and both the inlet and outlet ends of the primary air fan 122 are equipped with baffles 124.

[0055] In use, the damper door 124 is opened and the primary air fan 122 is started. The primary air fan 122 extracts the gas from the waste bin 10, and after being heated by the air preheater 123, the hot gas is sent into the incinerator 13 through the primary air vent 131 via the primary air main pipe 121. By setting the damper door 124, gas flow can be isolated during inspection and maintenance.

[0056] In some other embodiments, the primary air assembly 12 may further include a primary air main pipe, a primary air fan, an air preheater, and primary air branch pipes. One end of the primary air main pipe is connected to the exhaust main pipe 11, the air preheater is mounted on the primary air main pipe, and the other end of the primary air main pipe is connected to several primary air outlets on the incinerator 13 through several primary air branch pipes. Each primary air branch pipe is equipped with a primary air fan. The primary air assembly 12 may also adopt other existing structures, which are not limited here.

[0057] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A negative pressure system for a waste bin, characterized in that The application relates to a waste incinerator, which comprises a waste bin (10), an air extraction main pipe (11) communicated with the waste bin (10), a primary air assembly (12) communicated with a primary air inlet (131) of a waste incinerator (13) through the air extraction main pipe (11), an air extraction branch pipe (14) communicated with a secondary air inlet (132) of the waste incinerator (13) through the air extraction main pipe (11), a branch pipe valve (15) and an air extraction fan (16) arranged on the air extraction branch pipe (14) in sequence along the direction from the air extraction main pipe (11) to the secondary air inlet (132), and part of the air extraction branch pipe (14) is arranged in a furnace wall (133) of the waste incinerator (13).

2. The system of claim 1, wherein, A plurality of furnace wall passages (134) are arranged in the furnace wall (133), and the furnace wall passages (134) form inner cavities of the air extraction branch pipe (14).

3. The system of claim 1, wherein, A natural air inlet (141) is arranged on the air extraction branch pipe (14) and located between the branch pipe valve (15) and the air extraction fan (16), and the natural air inlet (141) is communicated with one end of a natural air valve (17).

4. The system of claim 1, wherein, An outlet end of the air extraction branch pipe (14) is communicated with the secondary air inlet (132) through a second branch pipe (18), and a second valve (19) is arranged on the second branch pipe (18).

5. The system of claim 4, wherein, An outlet end of the air extraction branch pipe (14) is communicated with the primary air inlet (131) through a first branch pipe (20), and a first valve (21) is arranged on the first branch pipe (20).

6. The system of claim 1, wherein, A top of the waste bin (10) is provided with an air extraction opening, and the air extraction main pipe (11) is communicated with the air extraction opening.

7. The system of claim 1, wherein, The primary air assembly (12) comprises a primary air main pipe (121), a primary air fan (122) and an air preheater (123), two ends of the primary air main pipe (121) are respectively communicated with the air extraction main pipe (11) and the primary air inlet (131), and the primary air fan (122) and the air preheater (123) are arranged on the primary air main pipe (121).

8. The system of claim 7, wherein, The primary air fan (122) is arranged between the primary air main pipe (121) and the air preheater (123).

9. The system according to claim 7 or 8, wherein The primary air fan (122) is provided with baffle doors (124) at an inlet end and an outlet end.

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