Household garbage odor treatment system

Abstract

The invention discloses a household garbage odor treatment system. In a default state, the main gas passage is conducted, the standby gas passage is closed, the deodorant spraying equipment is turned off, and when the gas negative pressure in the household garbage storage bin exceeds a preset interval, the flow of the main gas passage is regulated and controlled so that the gas negative pressure in the household garbage storage bin can recover to the preset interval. When the amount of gas conveyed to the household garbage heat treatment equipment by the main gas passage is lower than a first preset flow threshold value, the oxygen supply fan is started, and when the amount of gas conveyed to the household garbage heat treatment equipment by the main gas passage is higher than the first preset flow threshold value, the oxygen supply fan is closed; under the condition that the default state fails, the main gas passage is controlled to be closed, the standby gas passage is controlled to be opened, and when the gas negative pressure in the household garbage storage bin exceeds a preset interval, the flow of the standby gas passage is controlled so that the gas negative pressure in the household garbage storage bin can be recovered to the preset interval; when the emission concentration of the standby deodorization equipment is higher than a preset concentration threshold value, the deodorant spraying equipment is started.

Description

Technical Field

[0001] The invention relates to a system for treating odor of domestic garbage. Background Art

[0002] Before incineration or pyrolysis gasification, domestic waste needs to be dehydrated and fermented in a waste storage pit for 5-10 days. This process produces a large amount of malodorous gas, which is harmful to the surrounding environment and the health of workers.

[0003] Chinese invention patent application CN116538616A proposes a fresh air deodorization device and deodorization system for a waste incineration power plant. The device includes a negative pressure suction device and a positive pressure air supply device. The negative pressure suction device includes a suction main pipe, a suction branch pipe, an exhaust deodorization unit, and a fan; the positive pressure suction device includes an air supply main pipe and air supply branches arranged at equal intervals on the air supply main pipe; the air supply branch pipe is arranged in the garbage crane control room, and the air supply outlet of the air supply main pipe faces the corridor; the air supply main pipe is connected to the fresh air chemical filtration unit. The deodorization system includes a fresh air chemical filtration system and an exhaust deodorization system; the exhaust deodorization system collects organic waste gas: then treats it through a photocatalytic oxidation treatment device; after treatment, it is adsorbed by activated carbon; and finally transported outdoors through a centrifugal fan. The fresh air chemical filtration system positively adsorbs outdoor air into the fresh air chemical filtration unit for physical and chemical adsorption; after adsorption, it is transported to the garbage crane control room through a fan. No attention is paid to the odor generated during the storage of domestic waste, and the deodorization process is a single line.

[0004] Chinese invention patent application CN112870953A proposes a deodorization system and deodorization method for kitchen waste and incineration treatment. The system includes: solid residue conveying equipment, connecting the kitchen workshop and the domestic waste bin, so as to convey the solid residue with odor in the kitchen waste treated in the kitchen workshop to the domestic waste bin; odor conveying equipment, located in the kitchen workshop, which is used to convey the odor in the kitchen workshop to the domestic waste bin; incineration equipment, located in the domestic waste bin, which is used to incinerate the solid residue and odor in the domestic waste bin. Through the coordinated treatment setting of the kitchen workshop and the domestic waste bin, the odor generated in the kitchen workshop is directly conveyed to the domestic waste bin for more thorough incineration disposal, achieving a very impressive odor treatment effect, effectively solving the odor problem caused by the need for heating in traditional kitchen waste treatment projects, and not affecting the surrounding environment. If the system is transferred to a large-scale domestic waste treatment system, the deodorization reliability and precise controllability need to be improved.

[0005] Chinese invention patent application CN110882408A proposes a deodorization method using a plant deodorant in combination with a high-pressure sprayer. The control system of the high-pressure sprayer controls the high-pressure pump to pump the spray liquid in the spray box into the high-pressure pipe, and then the spray liquid is atomized into fine particles of 0.1-4μm through the high-pressure nozzle and sprayed into the garbage transfer station. The control system controls the spraying time of each spraying to be 0.5-3min, and the spraying time interval is 10-15min. The consumption of the plant deodorant is large.

[0006] A domestic waste treatment system is needed to perform accurate and reliable deodorization management on the domestic waste treated therein. Summary of the invention

[0007] The invention provides a system for treating odor of domestic garbage, which can accurately and reliably remove the odor generated by domestic garbage before incineration.

[0008] The technical solution of the present invention is as follows: A system for treating odor of domestic waste, comprising:

[0009] Domestic waste storage bin, used to store domestic waste;

[0010] Domestic waste thermal treatment equipment, used for incineration or pyrolysis gasification of domestic waste output from the waste storage bin;

[0011] Oxygen supply fan, used to supply outside air to the domestic waste thermal treatment equipment;

[0012] The main gas passage is used to pump the odor in the domestic waste storage bin to the domestic waste thermal treatment equipment;

[0013] Spare deodorizing equipment for removing odors by adsorption;

[0014] A backup gas passage, used to pump the odor in the domestic waste storage bin to the backup deodorization equipment;

[0015] Deodorant spray equipment, used to spray deodorant into domestic waste storage bins;

[0016] The controller is used to control the conduction of the main gas passage, the shutdown of the backup gas passage, and the deodorant spray equipment under the default state; when the negative pressure of the gas in the domestic waste storage bin exceeds the preset interval, the flow of the main gas passage is adjusted to restore the negative pressure of the gas in the domestic waste storage bin to the preset interval; when the amount of gas transported from the main gas passage to the domestic waste heat treatment equipment is lower than a first preset flow threshold, the oxygen supply fan is started; when the amount of gas transported from the main gas passage to the domestic waste heat treatment equipment is higher than the first preset flow threshold, the oxygen supply fan is shut down; and it is also used to control the closure of the main gas passage and control the conduction of the backup gas passage in the event of a main gas passage failure or a shutdown of the domestic waste heat treatment equipment; when the negative pressure of the gas in the domestic waste storage bin exceeds the preset interval, the flow of the backup gas passage is adjusted to restore the negative pressure of the gas in the domestic waste storage bin to the preset interval; and the deodorant spray equipment is started when the emission concentration of the backup deodorization equipment is higher than the preset concentration threshold.

[0017] Optionally, the controller is also used to control the spraying amount of the deodorant spray device according to the emission concentration of the standby deodorization device.

[0018] Optionally, the controller is also used to divert part of the gas in the main gas passage to the backup deodorization equipment when the main gas passage is turned on and the oxygen supply blower is turned off, and when the amount of gas delivered by the main gas passage to the domestic waste thermal treatment equipment is higher than a second preset flow threshold.

[0019] Optionally, a first pressure transmitter is arranged in the domestic waste storage bin, and a main system fan, a first electric regulating valve and a first flow meter are arranged in sequence along the gas flow direction on the main gas passage, and a controller connects the first pressure transmitter, the main system fan, the first electric regulating valve and the first flow meter.

[0020] Optionally, a first manual valve is also provided on the main gas passage.

[0021] Optionally, a first pressure transmitter is arranged in the domestic waste storage bin, and a backup system fan, a second electric regulating valve and a second flow meter are arranged in sequence along the gas flow direction on the backup gas passage, and the controller connects the first pressure transmitter, the backup system fan, the second electric regulating valve and the second flow meter.

[0022] Optionally, a second manual valve is also provided on the backup gas passage.

[0023] Optionally, a first pressure transmitter is arranged in the domestic waste storage bin, a main system fan, a first electric regulating valve, a first flow meter and a third electric regulating valve are arranged in sequence along the gas flow direction on the main gas passage, and a backup system fan, a second electric regulating valve, a second flow meter and a fourth electric regulating valve are arranged in sequence along the gas flow direction on the backup gas passage, wherein the main gas passage and the backup gas passage have a common section, the first flow meter and the second flow meter are located at the front side of the common section, and the third electric regulating valve and the fourth electric regulating valve are located at the rear side of the common section;

[0024] The controller is connected to the first pressure transmitter, the main system fan, the first electric regulating valve, the first flow meter, the third electric regulating valve, the backup system fan, the second electric regulating valve, the second flow meter and the fourth electric regulating valve.

[0025] Optionally, the standby deodorization equipment includes an activated carbon adsorption box, and the domestic waste treatment system further includes a sensor connected to the controller, and the sensor is used to detect the emission concentration of the standby deodorization equipment.

[0026] Optionally, it also includes: a first exhaust fan for pumping the odor in the leachate treatment station into the domestic waste storage bin; a second exhaust fan for pumping the odor in the loading and unloading hall into the domestic waste storage bin; a third exhaust fan for pumping the odor in the leachate collection station into the domestic waste storage bin; and a fourth exhaust fan for pumping the odor leaked from the enclosing structure into the domestic waste storage bin.

[0027] Optionally, the preset interval of the negative pressure of the gas in the domestic waste storage bin is -30Pa to -10Pa.

[0028] The domestic waste heat treatment equipment, standby deodorization equipment and deodorant spray equipment are linked to ensure stable and reliable deodorization performance in the waste storage bin, and the treated gas can be directly discharged into the atmosphere. The deodorization efficiency is high, especially suitable for domestic waste treatment stations of a certain scale. The whole system is automatically controlled by the controller, and the deodorization process is precisely controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention discloses a deodorization process flow chart of a domestic waste odor treatment system.

[0030] Figure 2 It is a structural schematic diagram of the domestic garbage odor treatment system of the present invention.

[0031] The accompanying drawings are marked as follows: 1. First exhaust fan; 2. Second exhaust fan; 3. Third exhaust fan; 4. Fourth exhaust fan; 5. Main system fan; 6. Backup system fan; 7. First manual valve; 8. Second manual valve; 9. First electric regulating valve; 10. Second electric regulating valve; 11. First flow meter; 12. Second flow meter; 13. First pressure transmitter; 14. Second pressure transmitter; 15. Controller; 16. Third electric regulating valve; 17. Fourth electric regulating valve; 18. Deodorant spray equipment; 19. Sensor; 20. Oxygen supply fan. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0033] refer to Figure 1 The embodiment of the present invention provides a system for treating odor of domestic waste, including: a domestic waste storage bin, a domestic waste heat treatment device, an oxygen supply fan 20, a main gas passage, a spare deodorizing device, a spare gas passage, a deodorant spray device 18 and a controller 15 ( Figure 1 not shown).

[0034] Domestic waste storage bins are used to store domestic waste, where it undergoes dehydration and fermentation treatment.

[0035] Domestic waste thermal treatment equipment is used to incinerate or pyrolyze and gasify domestic waste output from the waste storage bin.

[0036] The oxygen supply fan 20 is used to supply outside air to the domestic waste heat treatment equipment.

[0037] The main gas passage (indicated by the arrow connecting the garbage storage bin and the domestic waste thermal treatment equipment) is used to pump the gas in the garbage storage bin to the domestic waste thermal treatment equipment.

[0038] The standby deodorization equipment is used to remove odor by adsorption, for example, using an activated carbon adsorption box.

[0039] The backup gas passage (indicated by an arrow connecting the domestic waste storage bin and the backup deodorization equipment) is used to pump the gas in the waste storage bin to the backup deodorization equipment.

[0040] The deodorant spraying device 18 is used to spray deodorant into the domestic waste storage bin.

[0041] The controller 15 is used to control the main gas passage to be turned on, the backup gas passage to be turned off, and the deodorant spray device 18 to be turned off in the default state. When the negative pressure of the gas in the garbage storage bin exceeds the preset range, the flow of the main gas passage is adjusted to restore the negative pressure of the gas in the garbage storage bin to the preset range. Specifically, the gas pressure in the garbage storage bin is expected to be maintained in the negative pressure range of -30Pa to -10Pa, so as to continuously remove the odor in the garbage storage bin. The odor is incinerated and decomposed in the garbage thermal treatment equipment, thereby removing the odor.

[0042] Furthermore, in the default state, the controller 15 is used to start the oxygen supply fan 20 when the amount of gas delivered from the main gas passage to the domestic waste heat treatment equipment is lower than the first preset flow rate threshold, and to shut down the oxygen supply fan 20 when the amount of gas delivered from the main gas passage to the domestic waste heat treatment equipment is higher than the first preset flow rate threshold. This arrangement ensures that there is sufficient oxygen supply for waste incineration, and that the main gas passage inputs a sufficient amount of odor to the domestic waste heat treatment equipment.

[0043] Furthermore, the controller 15 is also used to control the closure of the main gas passage and the connection of the backup gas passage when the main gas passage fails or the domestic waste heat treatment equipment is shut down (for example, for maintenance); when the negative pressure of the gas in the garbage storage bin exceeds a preset interval, the flow of the backup gas passage is regulated to restore the negative pressure of the gas in the garbage storage bin to the preset interval; and when the emission concentration of the backup deodorization equipment is higher than a preset concentration threshold, the deodorant spray device 18 is started.

[0044] The signal of main gas passage failure or shutdown of domestic waste heat treatment equipment may be sent to the controller 15 manually, or may be sent to the controller 15 by components on the main gas passage or the domestic waste heat treatment equipment.

[0045] The backup deodorization equipment ensures uninterrupted deodorization operation in the garbage storage bin, and ensures stable negative pressure of the gas in the garbage storage bin, and stable deodorization performance of the garbage storage bin. At the same time, since the deodorant spray equipment 18 can reduce the amount of odor from the source, it serves as an auxiliary means to ensure that the gas discharged into the atmosphere is pollution-free.

[0046] The domestic waste heat treatment equipment, standby deodorization equipment and deodorant spray equipment 18 are linked to ensure stable and reliable deodorization performance in the waste storage bin, and the treated gas can be directly discharged into the atmosphere. The deodorization efficiency is high, especially suitable for large waste treatment stations. The whole system is automatically controlled by the controller 15, and the deodorization process is precisely controllable.

[0047] Optionally, the controller 15 is also used to control the spraying amount of the deodorant spray device 18 according to the emission concentration of the standby deodorizing device. When the emission concentration is high, the spraying amount is increased; when the emission concentration is low, the spraying amount is reduced.

[0048] Optionally, the controller 15 is also used to divert part of the gas in the main gas passage to the backup deodorization equipment when the main gas passage is turned on and the oxygen supply blower 20 is turned off, and when the amount of gas delivered by the main gas passage to the domestic waste thermal treatment equipment is higher than a second preset flow threshold.

[0049] The main gas passage and the backup gas passage can be independent of each other or can be controlled and connected. In order to ensure a reasonable negative pressure value in the garbage storage bin, the amount of gas on the main gas passage may be too high. At this time, the domestic garbage thermal treatment equipment cannot completely treat the odor in time, and part of the odor is diverted to the backup deodorization equipment, ensuring that the gas discharged into the atmosphere is clean gas.

[0050] refer to Figure 2 A first pressure transmitter 13 is arranged in the domestic waste storage bin, and a main system fan 5, a first electric regulating valve 9, a first flow meter 11, a second pressure transmitter 14 and a third electric regulating valve 16 are arranged in sequence along the gas flow direction on the main gas passage, and a controller 15 is connected to the first pressure transmitter 13, the main system fan 5, the first electric regulating valve 9, the first flow meter 11, the second pressure transmitter 14 and the third electric regulating valve 16.

[0051] The first pressure transmitter 13 is used to detect the air pressure in the garbage storage bin. The main system fan 5 extracts odor from the garbage storage bin and transports it to the domestic garbage heat treatment equipment. The second pressure transmitter 14 is used to detect the air pressure at the end of the main gas passage. The power of the system fan and the opening of the first electric regulating valve 9 are controlled by the controller 15 to adjust the flow of the main gas passage.

[0052] Optionally, a first manual valve 7 is further provided on the main gas passage. The first manual valve 7 is turned on by default, and the main gas passage can be manually cut off in case of emergency.

[0053] Optionally, a first pressure transmitter 13 is arranged in the garbage storage bin, and a backup system fan 6, a second electric regulating valve 10, a second flow meter 12, a second pressure transmitter 14 and a fourth electric regulating valve 17 are arranged in sequence on the backup gas passage along the gas flow direction, and a controller 15 connects the first pressure transmitter 13, the backup system fan 6, the second electric regulating valve 10, the second flow meter 12, the second pressure transmitter 14 and the third electric regulating valve 16.

[0054] The first pressure transmitter 13 is used to detect the air pressure in the garbage storage bin. The backup system fan 6 extracts odor from the garbage storage bin and transports it to the backup deodorization equipment. The second pressure transmitter 14 is used to detect the air pressure at the end of the backup gas passage. The power of the backup system fan 6 and the opening of the second electric regulating valve 10 are controlled by the controller 15 to adjust the flow of the backup gas passage.

[0055] Optionally, a second manual valve 8 is also provided on the backup gas passage. The second manual valve 8 is turned on by default, and the backup gas passage can be manually cut off in case of emergency.

[0056] Note: The second pressure transmitter 14 is used as an auxiliary device to assist in detecting the negative pressure of the domestic waste storage bin. In some other embodiments, the second pressure transmitter 14 is not provided.

[0057] Optionally, the standby deodorization equipment includes an activated carbon adsorption box, and the domestic waste treatment system further includes a sensor 19 connected to the controller 15, and the sensor 19 is used to detect the emission concentration of the standby deodorization equipment.

[0058] Optionally, it also includes: a first exhaust fan 1, used to pump the odor in the leachate treatment station into the garbage storage bin; a second exhaust fan 2, used to pump the odor in the loading and unloading hall into the garbage storage bin; a third exhaust fan 3, used to pump the odor in the leachate collection station into the garbage storage bin; a fourth exhaust fan 4, used to pump the odor leaked from the enclosing structure into the garbage storage bin.

[0059] The domestic waste storage bin is used as a unified outlet for the odor to be treated, and the leachate treatment station, loading and unloading hall, leachate collection station and surrounding structure are deodorized to make the gas in the entire waste treatment station odor-free.

[0060] The deodorant may be any known deodorant, for example, a plant deodorant.

[0061] Note: Figure 2 The waste incineration equipment in is taken as an example of domestic waste thermal treatment equipment.

[0062] The various embodiments of the present invention are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0063] The protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope and spirit of the present invention. If these changes and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these changes and modifications.

Claims

1. A system for treating odor in domestic waste, characterized in that: include: Domestic waste storage bin, used to store domestic waste; Domestic waste heat treatment equipment, used for incineration or pyrolysis gasification of domestic waste output from domestic waste storage bins; Oxygen supply fan, used to supply outside air to the domestic waste thermal treatment equipment; The main gas passage is used to pump the gas in the domestic waste storage bin to the domestic waste thermal treatment equipment; Spare deodorizing equipment for removing odors by adsorption; A backup gas passage, used to pump gas from the domestic waste storage bin to the backup deodorization equipment; Deodorant spray equipment, used to spray deodorant into domestic waste storage bins; The controller is used to control the conduction of the main gas passage, the shutdown of the backup gas passage, and the deodorant spray equipment under the default state; when the negative pressure of the gas in the domestic waste storage bin exceeds the preset interval, the flow of the main gas passage is adjusted to restore the negative pressure of the gas in the domestic waste storage bin to the preset interval; when the amount of gas transported from the main gas passage to the domestic waste heat treatment equipment is lower than a first preset flow threshold, the oxygen supply fan is started; when the amount of gas transported from the main gas passage to the domestic waste heat treatment equipment is higher than the first preset flow threshold, the oxygen supply fan is shut down; and it is also used to control the closure of the main gas passage and control the conduction of the backup gas passage in the event of a main gas passage failure or a shutdown of the domestic waste heat treatment equipment; when the negative pressure of the gas in the domestic waste storage bin exceeds the preset interval, the flow of the backup gas passage is adjusted to restore the negative pressure of the gas in the domestic waste storage bin to the preset interval; and when the emission concentration of the backup deodorizing equipment is higher than the preset concentration threshold, the deodorant spray equipment is started.

2. The system according to claim 1, characterized in that The controller is also used to control the spraying amount of the deodorant spray device according to the emission concentration of the standby deodorizing device.

3. The system according to claim 1, characterized in that The controller is also used to divert part of the gas in the main gas passage to the backup deodorization equipment when the main gas passage is turned on and the oxygen supply fan is turned off, and when the amount of gas delivered by the main gas passage to the domestic waste heat treatment equipment is higher than a second preset flow threshold.

4. The system according to claim 1, characterized in that A first pressure transmitter is arranged in the domestic waste storage bin, and a main system fan, a first electric regulating valve and a first flow meter are arranged in sequence along the gas flow direction on the main gas passage. A controller connects the first pressure transmitter, the main system fan, the first electric regulating valve and the first flow meter.

5. The system according to claim 4, characterized in that A first manual valve is also provided on the main gas passage.

6. The system according to claim 1, characterized in that A first pressure transmitter is arranged in the domestic waste storage bin, and a backup system fan, a second electric regulating valve and a second flow meter are arranged in sequence along the gas flow direction on the backup gas passage. The controller is connected to the first pressure transmitter, the backup system fan, the second electric regulating valve and the second flow meter.

7. The system according to claim 6, characterized in that A second manual valve is also provided on the backup gas passage.

8. The system according to claim 3, characterized in that A first pressure transmitter is arranged in the domestic waste storage bin, a main system fan, a first electric regulating valve, a first flow meter and a third electric regulating valve are arranged in sequence on the main gas passage along the gas flow direction, and a backup system fan, a second electric regulating valve, a second flow meter and a fourth electric regulating valve are arranged in sequence on the backup gas passage along the gas flow direction, wherein the main gas passage and the backup gas passage have a common section, the first flow meter and the second flow meter are located at the front side of the common section, and the third electric regulating valve and the fourth electric regulating valve are located at the rear side of the common section; The controller is connected to the first pressure transmitter, the main system fan, the first electric regulating valve, the first flow meter, the third electric regulating valve, the backup system fan, the second electric regulating valve, the second flow meter and the fourth electric regulating valve.

9. The system according to claim 1, characterized in that The standby deodorization equipment includes an activated carbon adsorption box, and the domestic waste treatment system also includes a sensor connected to the controller, and the sensor is used to detect the emission concentration of the standby deodorization equipment.

10. The system according to claim 1, characterized in that Also includes: The first exhaust fan is used to extract the odor in the leachate treatment station into the domestic waste storage bin; the second exhaust fan is used to extract the odor in the loading and unloading hall into the domestic waste storage bin; The third exhaust fan is used to extract the odor in the leachate collection station into the domestic waste storage bin; the fourth exhaust fan is used to extract the odor leaked from the enclosing structure into the domestic waste storage bin.

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