A low-cost deodorization system for sludge thermal drying in waste incineration plants

Abstract

This invention provides a low-cost deodorization system for sludge thermal drying in waste incineration plants. The system includes a sludge dryer with an odor-sealing enclosure on its exterior. The air inlet of the dryer is connected to the waste pit via a carrier gas inlet pipe to receive carrier gas. The carrier gas discharged from the dryer passes sequentially through a dust collector, a condenser, an induced draft fan, and a carrier gas outlet pipe before being returned to the waste pit. This low-cost deodorization system effectively improves deodorization by utilizing the low-concentration odorous gases that would otherwise be pumped into the incinerator as carrier gas in the sludge dryer. This minimizes the impact on the amount of odorous gases that would otherwise be treated in the incinerator and does not disrupt the negative pressure in the waste pit.

Description

Technical Field

[0001] This utility model relates to a sludge drying device, and more particularly to a low-cost deodorization system for thermal drying of sludge from a waste incineration plant. Background Technology

[0002] like Figure 1 As shown, the sludge dryer 1 needs to draw in air through an air inlet as carrier gas to carry away the water vapor evaporated from the sludge. The water-rich carrier gas then passes through a dust collector 2 for dust removal, and then through a condenser 3 for condensation. Finally, it is conveyed by an induced draft fan 4 to a deodorization device for purification before being discharged. The induced draft fan 4 is connected to the deodorization device via a carrier gas outlet pipe 8. The sludge dryer 1 requires a deodorization device capable of purifying large volumes of high-concentration odorous gas. However, the investment and operating costs of the deodorization device are high, thus increasing the overall cost of sludge treatment. Utility Model Content

[0003] This utility model provides a low-cost deodorization system for the thermal drying of sludge in waste incineration plants, solving the deodorization problem of sludge dryers. The technical solution is as follows:

[0004] A low-cost deodorization system for sludge thermal drying in a waste incineration plant is disclosed. The system includes a sludge dryer with an odor-depleting enclosure on its outer side. The air inlet of the sludge dryer is connected to the waste pit via a carrier air inlet pipe to input carrier air. The carrier air discharged from the sludge dryer passes sequentially through a dust collector, a condenser, an induced draft fan, and a carrier air outlet pipe before being returned to the waste pit.

[0005] The waste incineration plant has an opening in the side wall of the waste pool. One end of the air intake pipe is connected to the opening, and the other end passes through the deodorizing enclosure and connects to the air intake of the sludge dryer.

[0006] The dust collector is connected to one end of the exhaust pipe, which passes through the deodorizing enclosure. The other end is equipped with a collection hood, which is cone-shaped and located above the leakage hole on the sludge dryer.

[0007] The carrier gas inlet pipe is equipped with a carrier gas inlet electric valve, and the carrier gas outlet pipe is equipped with a carrier gas outlet electric valve.

[0008] The induced draft fan is linked to open the electric valve for carrier gas intake and the electric valve for carrier gas exhaust.

[0009] The induced draft fan is linked to close the electric valve for the carrier gas inlet and the electric valve for the carrier gas outlet.

[0010] The carrier gas discharged from the sludge dryer, carrying the discharged drying water vapor, first enters the dust collector to remove sludge dust particles, then enters the condenser to remove water vapor, and finally uses an induced draft fan to transport the carrier gas back to the waste pool through the carrier gas outlet pipe.

[0011] The aforementioned low-cost deodorization system for sludge thermal drying in waste incineration plants, targeting the sludge dryers installed within the waste incineration plant, effectively reduces the investment and operating costs of the sludge thermal drying deodorization system while meeting deodorization requirements, thereby lowering the total cost of sludge drying treatment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a traditional sludge drying machine deodorization treatment system;

[0013] Figure 2 This is a schematic diagram of the structure of the low-cost deodorization system for sludge thermal drying in the waste incineration plant.

[0014] Figure 3 This is a plan view of the low-cost deodorization system for sludge thermal drying at the waste incineration plant.

[0015] Figure 4 It is the aforementioned Figure 3 Schematic diagram of section II;

[0016] Attached reference numerals: 1-Sludge dryer; 2-Dust collector; 3-Condenser; 4-Exhaust fan; 5-Deodorizing enclosure; 6-Carrier gas inlet electric valve; 7-Carrier gas inlet pipe; 8-Carrier gas outlet pipe; 9-Carrier gas outlet electric valve. Detailed Implementation

[0017] like Figures 2-4 As shown, the low-cost deodorization system for sludge thermal drying in the waste incineration plant includes a sludge dryer 1. An odor-sealing hood 5 is installed on the outside of the sludge dryer 1. The air inlet of the sludge dryer 1 is connected to the waste pit via a carrier gas inlet pipe 7 to input carrier gas. The carrier gas discharged from the sludge dryer 1 passes sequentially through a dust collector 2, a condenser 3, an induced draft fan 4, and a carrier gas outlet pipe 8, before being transported back to the waste pit. Thus, the carrier gas required by the sludge dryer 1 in the waste incineration plant is connected to the air inlet of the sludge dryer 1 via a dedicated pipeline from the waste pit. After carrying away the water vapor generated during sludge thermal drying, the carrier gas undergoes dust removal and water vapor condensation treatment, and is then transported back to the waste pit via the induced draft fan 4 through a dedicated pipeline. Finally, the odor from the waste pit is sent to the incinerator for combustion by the primary air fan of the incineration plant.

[0018] The waste incineration plant has an opening in the side wall of the waste pit, which connects to one end of a carrier gas inlet pipe 7. The other end of the carrier gas inlet pipe 7 passes through a deodorizing enclosure 5 and connects to the air inlet of the sludge dryer 1, thus meeting the requirement of drawing air from the waste pit. A carrier gas inlet electric valve 6 is installed on the carrier gas inlet pipe 7 to control the flow of carrier gas into the pipe.

[0019] An odor-proof enclosure 5 is installed around the sludge dryer 1 to control the odor emitted by the sludge dryer 1 during operation within the enclosure 5, and then pumps it into the waste pit through the leakage holes on the sludge dryer 1. Because the sludge dryer 1 is not airtight, the odor emitted by it is collected by the odor-proof enclosure 5 and then pumped into the waste pit along with the carrier gas by the blower 4.

[0020] The dust collector 2 is connected to one end of the exhaust pipe, which passes through the deodorizing enclosure 5. The other end is equipped with a collection hood, which is cone-shaped and located above the leakage hole of the sludge dryer 1. Thus, after the carrier gas is transported to the sludge dryer 1 through the carrier gas inlet pipe 7, the carrier gas, carrying the discharged drying moisture, first enters the dust collector 2 to remove sludge particles, then enters the condenser 3 to remove moisture, and finally, the carrier gas is transported back to the waste pit by the induced draft fan 4 through the carrier gas outlet pipe 8. Furthermore, the carrier gas outlet pipe 8 is equipped with a carrier gas outlet electric valve 9 to control the discharge of the carrier gas.

[0021] During use, a carrier gas inlet electric valve 6 is installed on the carrier gas inlet pipe 7, and a carrier gas outlet electric valve 9 is installed on the carrier gas outlet pipe 8. When the induced draft fan 4 is running, the carrier gas inlet electric valve 6 and the carrier gas outlet electric valve 9 are opened in a linkage control. When the induced draft fan 4 is turned off, the carrier gas inlet electric valve 6 and the carrier gas outlet electric valve 9 are closed in a linkage control to prevent the odor from the garbage pit from spreading to the workshop where the sludge dryer 1 is located.

[0022] contrast Figure 1 The traditional sludge drying machine deodorization system shown in this invention optimizes the process by changing the source and destination of the carrier gas used in sludge drying, replacing a separate carrier gas deodorization device. An odor-sealed enclosure is installed on the sludge dryer to control the spread of leaked odors. This invention effectively reduces the investment and operating costs of sludge thermal drying and deodorization systems in waste incineration plants while improving workshop air quality.

[0023] This invention eliminates the need for a separate, high-investment deodorization system in the sludge dryer of a waste incineration plant, achieving improved deodorization and deodorization efficiency. The low-concentration odorous gas that would otherwise be pumped into the waste pit for incineration is used as the carrier gas in the sludge dryer, minimizing the impact on the amount of odorous gas that would otherwise need to be treated by the incinerator and without disrupting the negative pressure in the waste pit.

[0024] The additional deodorizing enclosure for the dryer collects odors emitted from the dryer due to its lack of airtightness, which are then drawn into the waste pit along with the carrier air by the induced draft fan. This reduces the spread and leakage of odors and improves the air quality within the workshop.

Claims

1. A low cost deodorization system for sludge thermal drying in a waste incineration plant, characterized by: The low-cost deodorization system for sludge thermal drying in the waste incineration plant includes a sludge dryer. The sludge dryer is equipped with an odor-proof enclosure. The air inlet of the sludge dryer is connected to the waste pit through a carrier air inlet pipe to input carrier air. The carrier air discharged from the sludge dryer passes through a dust collector, a condenser, an induced draft fan, and a carrier air outlet pipe in sequence, and is then transported back to the waste pit.

2. The low cost deodorization system for sludge thermal drying in waste incineration plants according to claim 1, characterized in that: The waste incineration plant has an opening in the side wall of the waste pool. One end of the air intake pipe is connected to the opening, and the other end passes through the deodorizing enclosure and connects to the air intake of the sludge dryer.

3. The low cost deodorization system for sludge thermal drying in waste incineration plant as claimed in claim 1 wherein said system comprises of: The dust collector is connected to one end of the exhaust pipe, which passes through the deodorizing enclosure. The other end is equipped with a collection hood, which is cone-shaped and located above the leakage hole on the sludge dryer.

4. The low cost deodorization system for sludge thermal drying in waste incineration plant as claimed in claim 1 wherein: The carrier gas inlet pipe is equipped with a carrier gas inlet electric valve, and the carrier gas outlet pipe is equipped with a carrier gas outlet electric valve.

5. The low cost deodorization system for sludge thermal drying in waste incineration plants according to claim 4, characterized in that: The induced draft fan is linked to open the electric valve for carrier gas intake and the electric valve for carrier gas exhaust.

6. The low cost deodorization system for MSW incineration plant sludge thermal drying as claimed in claim 1 wherein: The induced draft fan is linked to close the electric valve for the carrier gas inlet and the electric valve for the carrier gas outlet.

7. The low cost deodorization system for MSW incineration plant sludge thermal drying as claimed in claim 1 wherein: The carrier gas discharged from the sludge dryer, carrying the discharged drying water vapor, first enters the dust collector to remove sludge dust particles, then enters the condenser to remove water vapor, and finally uses an induced draft fan to transport the carrier gas back to the waste pool through the carrier gas outlet pipe.

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