Sludge drying and treatment system utilizing waste heat and waste pressure of garbage incinerator

Abstract

High-pressure steam is changed into high-speed steam through the ejector, air and water vapor in the vacuum dryer are pumped out according to the high-speed gas pumping and ejecting principle, and vacuum is generated to conduct vacuum drying on high-water-content sludge; air and water vapor in the vacuum dryer are brought out under the action of the ejector and negative pressure, and are condensed together with the high-temperature and high-pressure vapor in the jacket to heat the vacuum dryer, so that the waste heat of the high-temperature and high-pressure vapor is fully recycled, the drying efficiency is high, the energy consumption is low, and the moisture of sludge can be reduced to be less than 10%; sludge is incinerated and dried through the fluidized bed sludge incinerator, generated flue gas exchanges heat with air through the flue gas circulation assembly to generate medium-temperature hot air and high-temperature hot air, the high-temperature hot air is supplied to the fluidized bed sludge incinerator for use, and the medium-temperature hot air is supplied to the garbage incinerator for use. Therefore, consumption of high-grade steam generated by garbage combustion is remarkably reduced, the steam can be used for power generation or other work, and the energy utilization efficiency and quality are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge drying and treatment, and in particular relates to a sludge drying and treatment system utilizing waste heat and waste pressure of a garbage incinerator. Background Art

[0002] With the rapid development of urbanization, the amount of collected domestic garbage is increasing day by day. With the improvement of people's living standards, urban domestic garbage has been collected and treated in a centralized manner. At the same time, the output of sludge is increasing. The sludge has problems such as high water content, easy corruption, bad odor, heavy metals and other organic pollutants. If it is not effectively treated, it may pollute groundwater, surface water and soil, and the harm and odor pollution it brings to the food chain cannot be ignored. Incineration of garbage for power generation is the main way to treat garbage harmlessly, recycle it and reduce its volume. However, the moisture content of domestic garbage is relatively high, and most of the garbage has a low calorific value and is not easy to burn. In order to make the garbage burn quickly, the existing technology uses the exhaust steam in the garbage incinerator for The combustion air is preheated to increase the calorific value of garbage combustion, but the steam is directly discharged through the deaerator after the air is preheated, which cannot fully utilize the extremely high residual pressure, resulting in low resource utilization and serious heat loss; for domestic sludge, the main means of harmlessness is incineration, but the moisture content of the sludge is required to drop below 10%; currently, the sludge is mechanically dehydrated in the sewage treatment plant, and the moisture content can only be reduced to 65% at most, and secondary drying treatment must be carried out; conventional sludge thermal drying reduction technology consumes a lot of energy and is very costly, and because the inherent moisture is extremely difficult to remove, the moisture content is difficult to drop below 20%. It is urgent to find an energy-saving drying technology that can reduce the moisture content of sludge to below 10%.

[0003] In view of the above-mentioned phenomena and problems, we conducted in-depth research and proposed a sludge drying and treatment system that utilizes the waste heat and pressure of the waste incinerator. While ensuring the full combustion of domestic waste and its combustion efficiency, it fully utilizes the remaining high-pressure steam for sludge vacuum drying. It has high drying efficiency and low energy consumption, which greatly improves the energy utilization efficiency and quality, and has good energy-saving and environmental protection effects. Summary of the invention

[0004] In view of the above-mentioned existing problems, the present invention proposes a sludge drying and treatment system which utilizes the waste heat and waste pressure of the waste incinerator. While ensuring the full combustion of domestic waste and its combustion efficiency, it fully utilizes the remaining high-pressure steam for sludge vacuum drying. It has high drying efficiency and low energy consumption, which greatly improves the energy utilization efficiency and quality, and has good energy-saving and environmental protection effects.

[0005] To achieve the above-mentioned purpose, the present invention provides a sludge drying and treatment system using the waste heat and pressure of a garbage incinerator, comprising a sludge drying device, a sludge incineration device, a garbage incinerator and a sludge bin; the sludge drying device comprises a vacuum dryer and an ejector, the vacuum dryer is provided with a wet mud inlet, a dry mud outlet and a gas-liquid outlet, a heating jacket is wrapped on the outer plate thereof, the ejector is connected between the garbage incinerator and the vacuum dryer, and is provided with a high-pressure injection inlet, a low-pressure injection inlet and an ejection outlet; the wet mud inlet is connected to the sludge bin, the gas-liquid outlet is connected to the low-pressure injection inlet, and the heating jacket is connected to the ejection outlet; the sludge incineration device The device includes a fluidized bed incinerator and a flue gas circulation component, wherein the fluidized bed incinerator is connected to the vacuum dryer and is provided with a dry mud inlet, an air trough group and a flue gas outlet, wherein the dry mud inlet is connected to the dry mud outlet; the flue gas circulation component is connected between the waste incinerator and the fluidized bed incinerator, and includes a flue gas pipeline and a first air pipeline with opposite flow directions, the flue gas pipeline inlet is connected to the flue gas outlet, and the first air pipeline outlet is connected to the air trough group; the waste incinerator is provided with a steam outlet and a combustion-supporting air inlet, the steam outlet is connected to the high-pressure injection inlet, and the combustion-supporting air inlet is connected to the first air pipeline outlet.

[0006] Preferably, the flue gas circulation component also includes a low-temperature heat exchanger, a medium-temperature heat exchanger and a high-temperature heat exchanger, the flue gas pipeline inlet is connected to the flue gas outlet, passes through the high-temperature heat exchanger, the medium-temperature heat exchanger and the low-temperature heat exchanger in sequence, and the outlet is arranged at the low-temperature heat exchanger; the first air pipeline inlet is connected to the low-temperature heat exchanger, passes through the low-temperature heat exchanger, the medium-temperature heat exchanger and the high-temperature heat exchanger in sequence, and a medium-temperature outlet is arranged at the medium-temperature heat exchanger, and a high-temperature outlet is arranged at the high-temperature heat exchanger, the medium-temperature outlet is connected to the combustion-supporting air inlet, and the high-temperature outlet is connected to the wind trough group.

[0007] Preferably, the steam outlet provided in the waste incinerator includes a high-temperature steam outlet and a low-temperature steam outlet.

[0008] Preferably, a steam component is also arranged between the waste incinerator and the ejector, and the steam component includes a primary heat exchanger, a secondary heat exchanger and a second air pipeline. The inlet of the primary heat exchanger is connected to the high-temperature steam outlet, and the outlet of the primary heat exchanger is provided with a first high-temperature steam outlet and a second high-temperature steam outlet. The high-pressure injection inlet is connected to the first high-temperature steam outlet, and the inlet of the secondary heat exchanger is connected to the low-temperature steam outlet. The second air pipeline is connected to the combustion-supporting air inlet through the secondary heat exchanger and the primary heat exchanger in turn.

[0009] Preferably, the steam component further includes a deaerator, and the deaerator is connected to the second high-temperature steam outlet and the secondary heat exchanger outlet.

[0010] Preferably, the waste incinerator is further provided with a bellows, and the first air pipeline outlet and the second air pipeline outlet are both connected to the combustion-supporting air inlet through the bellows.

[0011] Preferably, a first screw conveying device is provided at the wet mud inlet, and a second screw conveying device is provided at the dry mud inlet.

[0012] Preferably, a waste liquid treatment component is also provided, including a waste liquid treatment tank and a garbage leachate pipeline. The waste liquid treatment tank is connected to the garbage leachate pipeline and the outlet of the jacket respectively, and is used to collect and treat the leachate before garbage combustion and the water vapor mixture generated by heat exchange.

[0013] Preferably, the flue gas circulation component is further provided with a flue gas treatment device, and the flue gas treatment device is connected to the outlet of the low-temperature heat exchanger and is used to treat the flue gas after the heat exchange is completed.

[0014] Preferably, a detection component is also provided, which includes a heavy metal detection sensor and an organic matter detection sensor, and is arranged in the waste liquid treatment tank and the flue gas treatment device.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a sludge drying and treatment system utilizing the waste heat and waste pressure of a garbage incinerator, which is provided with a sludge drying device, a sludge incineration device and a garbage incinerator connected in a loop; wherein the sludge drying device composed of a vacuum dryer and an ejector adopts a vacuum drying method for the sludge with high moisture content, and adopts an ejector to convert the high-pressure steam discharged from the garbage incinerator into high-speed steam, and utilizes the principle of suction and injection of high-speed gas to extract the air and water vapor in the vacuum dryer, thereby generating a vacuum to vacuum dry the sludge with high moisture content; at the same time, the air and water vapor in the vacuum dryer are taken out under the action of the ejector and negative pressure, and together with the high-temperature and high-pressure steam Condensation and heat release in the jacket heat the vacuum dryer, fully recycling the waste heat of high-temperature and high-pressure steam, with high drying efficiency and low energy consumption, and can reduce the moisture content of sludge to less than 10%; the sludge incineration device composed of a fluidized bed incinerator and a flue gas circulation component utilizes a fluidized bed sludge incinerator to incinerate the dried sludge, and the flue gas generated is heat-exchanged with the air through the flue gas circulation component to generate medium-temperature hot air and high-temperature hot air, wherein the high-temperature hot air is used by the fluidized bed sludge incinerator, and the medium-temperature hot air is used by the garbage incinerator, thereby significantly reducing the consumption of high-grade steam generated by garbage combustion, so that it can be used for power generation or other work, greatly improving energy utilization efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a sludge drying and treatment system utilizing waste heat and waste pressure from a garbage incinerator.

[0017] In the figure: 1-sludge bin, 2-waste incinerator, 21-bellows, 31-primary heat exchanger, 311-steam switch, 32-secondary heat exchanger, 33-second air pipeline, 34-deaerator, 41-ejector, 411-high pressure injection inlet, 412-low pressure injection inlet, 413-injection outlet, 42-vacuum dryer, 421-wet mud inlet, 422-first screw conveyor, 423-heating jacket, 51-first air Gas pipeline, 52-flue gas pipeline, 53-low-temperature heat exchanger, 54-medium-temperature heat exchanger, 541-medium-temperature outlet, 55-high-temperature heat exchanger, 551-high-temperature outlet, 56-flue gas treatment device, 57-fluidized bed incinerator, 571-dry mud inlet, 572-second screw conveying device, 573-air inlet trough, 61-landfill leachate pipeline, 62-waste liquid treatment tank, 71-heavy metal detection sensor, 72-organic matter detection sensor. DETAILED DESCRIPTION

[0018] To further describe the present invention in detail, the following is an explanation with reference to the accompanying drawings. It is particularly noted that the embodiments described below are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 The present embodiment provides a sludge drying and treatment system utilizing the waste heat and waste pressure of a garbage incinerator, comprising a sludge bin 1, a garbage incinerator 2, a steam component, a sludge drying device, a sludge incineration device, a waste liquid treatment component and a detection component, wherein the garbage incinerator 2, the sludge drying device and the sludge incineration device are in a circulating connection state, so as to fully utilize the high-temperature steam generated by the combustion of garbage to carry out sludge drying work, and at the same time utilize the heat generated by the combustion of garbage and sludge to preheat the combustion-supporting air to improve the combustion efficiency of domestic garbage.

[0020] The waste incinerator 2 is provided with a bellows 21, a combustion air inlet and a steam outlet. In the present embodiment, the bellows 21 is connected to the combustion air inlet, the steam outlet comprises a high-temperature steam outlet and a low-temperature steam outlet, the high-temperature steam outlet is connected to the inlet of the primary heat exchanger 31, and the low-temperature steam outlet is connected to the inlet of the secondary heat exchanger 32.

[0021] The steam component is arranged between the waste incinerator 2 and the sludge drying device, and includes a primary heat exchanger 31, a secondary heat exchanger 32, a second air pipeline 33 and a deaerator 34. In the present embodiment, the outlet of the primary heat exchanger 31 is provided with a first high-temperature steam outlet and a second high-temperature steam outlet. The first high-temperature steam outlet is connected to the ejector 41, and the second high-temperature steam outlet and the outlet of the secondary heat exchanger 32 are respectively connected to the deaerator 34. A steam switch 311 is arranged between the first high-temperature steam outlet and the high-pressure injection inlet 411 and between the second high-temperature steam outlet and the deaerator 34. The steam amounts outputted by the first high-temperature steam outlet and the second high-temperature steam outlet can be adjusted according to the actual sludge drying requirements. The second air pipeline 33 is connected to the bellows 21 through the secondary heat exchanger 32 and the primary heat exchanger 31 in turn.

[0022] The sludge drying device includes an ejector 41 and a vacuum dryer 42. The ejector 41 is connected between the waste incinerator 2 and the vacuum dryer 42, and is provided with a high-pressure injection inlet 411, a low-pressure injection inlet 412 and an injection outlet 413. The vacuum dryer 42 is provided with a wet mud inlet 421, a dry mud outlet and a gas-liquid outlet, and a heating jacket 423 is wrapped on its outer plate; in this embodiment, the wet mud inlet 421 is connected to the sludge bin 1, the high-pressure injection inlet 411 is connected to the first high-temperature steam outlet, the low-pressure injection inlet 412 is connected to the gas-liquid outlet, and the injection outlet 413 is connected to the heating jacket 423.

[0023] The sludge incineration device includes a flue gas circulation component and a fluidized bed incinerator 57. The flue gas circulation component is connected between the garbage incinerator 2 and the fluidized bed incinerator 57, and includes a first air pipeline 51 and a flue gas pipeline 52 with opposite flow directions, a low-temperature heat exchanger 53, a medium-temperature heat exchanger 54, a high-temperature heat exchanger 55 and a flue gas treatment device 56. The fluidized bed incinerator 57 is connected to the vacuum dryer 42, and is provided with a dry mud inlet 571, a duct group and a flue gas outlet. In this embodiment, the fluidized bed incinerator 57 is a vortex bubble bed fluidized bed incinerator 57, and the duct group is provided with three air ducts 573. The air inlet ducts 573 are evenly distributed at the bottom of the fluidized bed incinerator 57 to ensure that hot air evenly enters the fluidized bed incinerator 57; the dry mud inlet 571 and The dry mud outlet is connected; the inlet of the first air pipeline 51 is connected to the low-temperature heat exchanger 53, passes through the low-temperature heat exchanger 53, the medium-temperature heat exchanger 54 and the high-temperature heat exchanger 55 in sequence, and a medium-temperature outlet 541 is provided at the medium-temperature heat exchanger 54, and a high-temperature heat exchanger 551 is provided at the high-temperature heat exchanger 55, the medium-temperature outlet 541 is respectively connected to the high-temperature heat exchanger 55 and the wind box 21, and the high-temperature heat exchanger 551 is respectively connected to three groups of air inlet ducts 573; the inlet of the flue gas pipeline 52 is connected to the flue gas outlet, passes through the high-temperature heat exchanger 55, the medium-temperature heat exchanger 54 and the low-temperature heat exchanger 53 in sequence, and the outlet is provided at the low-temperature heat exchanger 53, and the flue gas treatment device 56 is connected to the outlet of the low-temperature heat exchanger 53, and is used to treat the flue gas after the heat exchange is completed.

[0024] The waste liquid treatment component is used to collect and treat the leachate before garbage combustion and the water vapor mixture generated by heat exchange, and includes a garbage leachate pipeline 61 and a waste liquid treatment tank 62. In this embodiment, the inlet of the garbage leachate pipeline 61 is connected to the place where the garbage to be burned is placed, and the waste liquid treatment tank 62 is respectively connected to the garbage leachate pipeline 61 and the outlet of the jacket.

[0025] The detection component includes a heavy metal detection sensor 71 and an organic matter detection sensor 72 , which are arranged in the waste liquid treatment tank 62 and the flue gas treatment device 56 .

[0026] A first screw conveying device 422 is provided at the wet mud inlet 421, and a second screw conveying device 572 is provided at the dry mud inlet 571. The first screw conveying device 422 and the second screw conveying device 572 can be spiral conveying cylinders or scrapers. In this embodiment, spiral conveying cylinders are provided at both the wet mud inlet 421 and the dry mud inlet 571.

[0027] In this embodiment, domestic waste is burned in the waste incinerator 2 to generate a large amount of steam, wherein the low-temperature steam outlet outputs low-temperature steam with a temperature of about 184°C and a pressure of 1300 kPa to the secondary heat exchanger 32, and the high-temperature steam outlet outputs high-temperature steam with a temperature of about 380°C and a pressure of 3000 kPa to the primary heat exchanger 31, and normal temperature air with a temperature of 20°C passes through the second air pipeline 33 in turn through the second heat exchanger and the first heat exchanger to generate combustion-supporting air with a temperature of about 260°C and a pressure of 2000 kPa, and enters the waste incinerator through the wind box 21. The incinerator 2 can effectively increase the combustion temperature of the garbage. At this time, the high-temperature steam pressure is also 2000kPa. Part of the high-temperature steam is output from the first high-temperature steam outlet to the high-pressure injection inlet 411, and the remaining high-temperature steam and low-temperature steam are output to the deaerator 34 and used for power generation or other work; the sludge bin 1 transports the wet sludge with a moisture content of about 60% to the vacuum dryer 42 through the first screw conveying device 422, and heats it into dry sludge with a moisture content of 10%. Specifically, the high-pressure steam entering the ejector 41 through the high-pressure injection inlet 411 becomes a high-speed Steam, according to the principle of high-speed gas suction and injection, the air and water vapor in the vacuum dryer 42 are taken out through the gas-liquid outlet under the action of the ejector and negative pressure, and enter the heating jacket 423 through the injection outlet 413 together with the high-temperature and high-pressure steam, and condense and release heat in the heating jacket 423 to heat the vacuum dryer 42, so as to recover and utilize the waste heat and pressure of the high-temperature and high-pressure steam; the vacuum dryer 42 sends the dry sludge with a moisture content of 10% into the fluidized bed incinerator 57 through the second screw conveying device 572 to burn and release heat, and the 800-degree Celsius smoke generated after the dry sludge is incinerated The gas passes through the high-temperature heat exchanger 55, the medium-temperature heat exchanger 54, and the low-temperature heat exchanger 53 in sequence to exchange heat with the normal temperature air of 20°C entering from the first air pipeline 51. The high-temperature air with a temperature of 500°C is output to the fluidized bed incinerator 57 through the high-temperature heat exchanger 551 to be mixed with the dry sludge for combustion. The medium-temperature air with a temperature of 260°C is output to the wind box 21 through the medium-temperature outlet 541 and then enters the garbage incinerator 2, thereby reducing the demand of the garbage incinerator 2 for the combustion-supporting air generated by the steam component, reducing the heat consumption of the high-temperature steam, and improving the energy utilization efficiency and quality.

[0028] In this embodiment, the above is only an example and is not intended to limit the scope of protection of this application.

[0029] The present invention provides a sludge drying and treatment system using waste heat and waste pressure from a garbage incinerator, which is provided with a sludge drying device, a sludge incineration device and a garbage incinerator that are circularly connected; wherein the sludge drying device, which is composed of a vacuum dryer and an ejector, uses a vacuum drying method for high-water content sludge, uses an ejector to convert high-pressure steam discharged from the garbage incinerator into high-speed steam, and uses the pumping and ejection principle of high-speed gas to extract air and water vapor in the vacuum dryer, generating a vacuum to vacuum dry the high-water content sludge; at the same time, the air and water vapor in the vacuum dryer are taken out under the action of the ejector and negative pressure, and condense and release heat together with the high-temperature and high-pressure steam in the jacket. Thereby, the vacuum dryer is heated, and the waste heat of the high-temperature and high-pressure steam is fully recovered and utilized, with high drying efficiency and low energy consumption, and the moisture content of the sludge can be reduced to less than 10%; the sludge incineration device composed of a fluidized bed incinerator and a flue gas circulation component utilizes the fluidized bed sludge incinerator to incinerate the dried sludge, and the flue gas generated is heat-exchanged with the air through the flue gas circulation component to generate medium-temperature hot air and high-temperature hot air, wherein the high-temperature hot air is used by the fluidized bed sludge incinerator, and the medium-temperature hot air is used by the garbage incinerator, thereby significantly reducing the consumption of high-grade steam generated by garbage combustion, so that it can be used for power generation or other work, greatly improving energy utilization efficiency and quality.

[0030] The embodiments disclosed above are only for the purpose of describing the present invention in detail and cannot be used to limit the scope of the present invention. Therefore, simple modifications and changes made according to the scope of application of the claims of the present invention still fall within the scope of protection of the present invention.

[0031] The protection scope of the present invention shall be based on the defined scope. For those skilled in the art, several improvements and modifications may be made without departing from the spirit and scope of the present invention, and these and modifications shall also be regarded as the protection scope of the present invention.

Claims

1. A sludge drying and treatment system utilizing waste heat and pressure from a garbage incinerator, characterized in that: Including sludge drying device, sludge incineration device, garbage incinerator and sludge silo; The sludge drying device comprises a vacuum dryer and an ejector. The vacuum dryer is provided with a wet mud inlet, a dry mud outlet and a gas-liquid outlet, and a heating jacket is wrapped on the outer plate thereof. The ejector is connected between the waste incinerator and the vacuum dryer, and is provided with a high-pressure injection inlet, a low-pressure injection inlet and an ejection outlet; the wet mud inlet is connected to the sludge bin, the gas-liquid outlet is connected to the low-pressure injection inlet, and the heating jacket is connected to the ejection outlet; The sludge incineration device comprises a fluidized bed incinerator and a flue gas circulation assembly, wherein the fluidized bed incinerator is connected to the vacuum dryer and is provided with a dry mud inlet, an air trough group and a flue gas outlet, wherein the dry mud inlet is connected to the dry mud outlet; the flue gas circulation assembly is connected between the waste incinerator and the fluidized bed incinerator, and comprises a flue gas pipeline and a first air pipeline with opposite flow directions, wherein the flue gas pipeline inlet is connected to the flue gas outlet, and the first air pipeline outlet is connected to the air trough group; The waste incinerator is provided with a steam outlet and a combustion-supporting air inlet, the steam outlet is connected to the high-pressure injection inlet, and the combustion-supporting air inlet is connected to the first air pipeline outlet.

2. A sludge drying and treatment system using waste heat and pressure from a waste incinerator according to claim 1, characterized in that: The flue gas circulation component also includes a low-temperature heat exchanger, a medium-temperature heat exchanger and a high-temperature heat exchanger. The flue gas pipeline inlet is connected to the flue gas outlet, passes through the high-temperature heat exchanger, the medium-temperature heat exchanger and the low-temperature heat exchanger in sequence, and the outlet is arranged at the low-temperature heat exchanger; the first air pipeline inlet is connected to the low-temperature heat exchanger, passes through the low-temperature heat exchanger, the medium-temperature heat exchanger and the high-temperature heat exchanger in sequence, and a medium-temperature outlet is arranged at the medium-temperature heat exchanger, and a high-temperature outlet is arranged at the high-temperature heat exchanger, the medium-temperature outlet is connected to the combustion-supporting air inlet, and the high-temperature outlet is connected to the wind trough group.

3. A sludge drying and treatment system using waste heat and pressure from a garbage incinerator according to claim 2, characterized in that: The steam outlets provided in the waste incinerator include a high-temperature steam outlet and a low-temperature steam outlet.

4. A sludge drying and treatment system using waste heat and pressure from a garbage incinerator according to claim 3, characterized in that: A steam component is also arranged between the waste incinerator and the ejector, and the steam component includes a primary heat exchanger, a secondary heat exchanger and a second air pipeline. The inlet of the primary heat exchanger is connected to the high-temperature steam outlet, and the outlet of the primary heat exchanger is provided with a first high-temperature steam outlet and a second high-temperature steam outlet. The high-pressure injection inlet is connected to the first high-temperature steam outlet, and the inlet of the secondary heat exchanger is connected to the low-temperature steam outlet. The second air pipeline is connected to the combustion-supporting air inlet through the secondary heat exchanger and the primary heat exchanger in turn.

5. A sludge drying and treatment system using waste heat and pressure from a garbage incinerator according to claim 4, characterized in that: The steam component further includes a deaerator, which is connected to the second high-temperature steam outlet and the secondary heat exchanger outlet.

6. A sludge drying and treatment system using waste heat and pressure from a garbage incinerator according to claim 5, characterized in that: The waste incinerator is also provided with a bellows, and the first air pipeline outlet and the second air pipeline outlet are both connected to the combustion-supporting air inlet through the bellows.

7. The sludge drying and treatment system using waste heat and pressure from a garbage incinerator according to claim 1 is characterized in that: The wet mud inlet is provided with a first screw conveying device, and the dry mud inlet is provided with a second screw conveying device.

8. The sludge drying and treatment system using waste heat and pressure from a garbage incinerator according to claim 1 is characterized in that: A waste liquid treatment component is also provided, including a waste liquid treatment tank and a garbage leachate pipeline. The waste liquid treatment tank is connected to the garbage leachate pipeline and the outlet of the jacket respectively, and is used to collect and treat the leachate before garbage combustion and the water vapor mixture generated by heat exchange.

9. A sludge drying and treatment system using waste heat and pressure from a garbage incinerator according to claim 8, characterized in that: The flue gas circulation component is also provided with a flue gas treatment device, which is connected to the outlet of the low-temperature heat exchanger and is used to treat the flue gas after the heat exchange is completed.

10. A sludge drying and treatment system using waste heat and pressure from a garbage incinerator according to claim 9, characterized in that: A detection component is also provided, which includes a heavy metal detection sensor and an organic matter detection sensor, and is arranged in the waste liquid treatment pool and the flue gas treatment device.

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