Sludge drying waste gas treatment system and treatment method thereof

Abstract

The invention discloses a sludge drying waste gas treatment system and a treatment method thereof. The sludge drying waste gas treatment system comprises a drying machine, spraying equipment and a garbage pool, the spraying equipment is communicated with the drying machine and comprises a spraying liquid inlet, a spraying liquid outlet and a spraying gas outlet; the garbage pool comprises a heating liquid inlet, a leachate outlet and a waste gas inlet, a spraying gas outlet of the spraying equipment is communicated with the waste gas inlet of the garbage pool, the leachate outlet of the garbage pool is communicated with a spraying liquid inlet of the spraying equipment, and a spraying liquid outlet of the spraying equipment is communicated with a heating liquid inlet of the garbage pool. According to the sludge drying waste gas treatment system, leachate in the garbage pool is used as a spraying solvent, waste gas is directly sprayed, condensed and dried, heat of water vapor is recycled, the waste gas is returned to the garbage pool to be sprayed and heat household garbage, non-condensable gas is introduced into the garbage pool to be mixed with primary air in the garbage pool, and then incineration treatment is conducted; therefore, waste heat utilization of the dried waste gas and co-treatment of pollutants are realized.

Description

Technical Field

[0001] The present application relates to the technical field of sludge treatment, and more specifically, to a sludge drying waste gas treatment system and a treatment method thereof. Background Art

[0002] In traditional municipal solid waste incineration plants and sludge coordinated disposal, sludge drying tail gas mostly adopts cyclone separators, indirect waste heat exchange and non-condensable gas to primary air to participate in incineration. The heated end of the indirect waste heat exchange is mostly circulating cooling water or part of the condensed water in the thermal system, which wastes the residual heat of the sludge drying tail gas and leads to low utilization rate of the residual heat of the sludge drying tail gas.

[0003] In addition, under condensing conditions, dust accumulation and corrosion are prone to occur on the surface of the heat exchanger, and the temperature of the dried exhaust gas itself is relatively low, resulting in a smaller temperature difference in indirect heat exchange and a lower heat exchange intensity.

[0004] Therefore, how to realize the waste heat utilization of dried exhaust gas and the coordinated disposal of pollutants has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide a sludge drying waste gas treatment system to achieve the waste heat utilization of the drying waste gas and the coordinated treatment of pollutants.

[0006] Another object of the present application is to provide a sludge drying waste gas treatment method using the above-mentioned sludge drying waste gas treatment system.

[0007] To achieve the above objectives, this application provides the following technical solutions:

[0008] A sludge drying waste gas treatment system, comprising:

[0009] Dryer, used for thermal drying of sludge to produce drying waste gas;

[0010] A spray device, the spray device is connected to the drying machine so that the dried waste gas is condensed in the spray device, and the spray device includes a spray liquid inlet, a spray liquid outlet and a spray gas outlet;

[0011] A garbage pit for storing domestic garbage, the garbage pit comprising a heating liquid inlet, a leachate outlet and a waste gas inlet, the spray outlet of the spray equipment being connected with the waste gas inlet of the garbage pit so that the non-condensable gas in the dried waste gas can enter the garbage pit, the leachate outlet of the garbage pit being connected with the spray inlet of the spray equipment so that the leachate of the garbage pit can enter the spray equipment to spray and condense the dried waste gas in the spray equipment, the spray outlet of the spray equipment being connected with the heating liquid inlet of the garbage pit so that the condensed water and leachate in the spray equipment can spray and heat the domestic garbage in the garbage pit.

[0012] Optionally, in the above-mentioned sludge drying waste gas treatment system, a leachate collection tank and a pump are sequentially arranged on the pipeline connecting the leachate outlet of the garbage pit and the spray liquid inlet of the spray equipment, and the leachate collection tank is arranged close to the leachate outlet of the garbage pit.

[0013] Optionally, in the above-mentioned sludge drying waste gas treatment system, a filter screen for filtering the leachate is provided in the pump.

[0014] Optionally, in the above-mentioned sludge drying waste gas treatment system, the pipeline connecting the spray outlet of the spray equipment and the heating inlet of the garbage pool is connected between the leachate collection tank and the pump through a branch pipeline, and a one-way throttle valve is provided on the branch pipeline.

[0015] Optionally, in the above-mentioned sludge drying waste gas treatment system, the temperature in the spraying equipment is controlled to be 45°C~60°C by the opening of the one-way throttle valve and the spray flow rate of the pump.

[0016] Optionally, in the above-mentioned sludge drying waste gas treatment system, the garbage pool has a first wall and a second wall arranged opposite to each other, and the domestic garbage in the garbage pool is stacked obliquely from the first wall to the second wall, and the heating liquid inlet is located on the second wall to spray toward the inclined surface of the domestic garbage.

[0017] Optionally, the above-mentioned sludge drying waste gas treatment system also includes an incinerator, and the garbage pool also includes a waste gas outlet, and the waste gas outlet of the garbage pool is connected to the incinerator so that the non-condensable gas in the garbage pool is mixed with the primary air and enters the incinerator for incineration.

[0018] Optionally, in the above-mentioned sludge drying waste gas treatment system, a first induced draft fan is provided on a pipeline connecting the waste gas outlet of the garbage pool and the incinerator; and / or,

[0019] A second induced draft fan is arranged on the pipeline connecting the drying machine and the spraying equipment.

[0020] A sludge drying waste gas treatment method, using the sludge drying waste gas treatment system as described in any one of the above items, the sludge drying waste gas treatment method comprising:

[0021] The drying waste gas is burned. The drying waste gas generated by the drying machine is condensed by the spraying equipment, so that the non-condensable gas in the drying waste gas enters the garbage pool;

[0022] Collecting leachate, wherein the leachate in the garbage pool flows back into the spraying device to spray and condense the drying waste gas generated by the drying machine;

[0023] To heat the domestic garbage, the water and leachate condensed from the water vapor of the dried waste gas in the spraying equipment enter the garbage pool to spray and heat the domestic garbage in the garbage pool.

[0024] Optionally, in the above-mentioned sludge drying waste gas treatment method, it also includes:

[0025] Incineration waste gas, the non-condensable gas in the garbage pool is mixed with the primary air and then enters the incinerator for incineration.

[0026] The sludge drying waste gas treatment system provided in the present application is connected with the spray inlet of the spray equipment through the leachate outlet of the garbage pool, so that the leachate generated in the garbage pool is used as the spray solvent to enter the spray equipment to directly spray and condense the drying waste gas. At the same time, the water condensed from the water vapor in the drying waste gas and the heated leachate enter the garbage pool through the pipeline connected with the spray outlet of the spray equipment and the heating inlet of the garbage pool, so as to utilize the waste heat of the water vapor to spray and heat the domestic garbage in the garbage pool, and the non-condensable gas in the drying waste gas can enter the garbage pool through the pipeline connected with the spray outlet of the spray equipment and the waste gas inlet of the garbage pool, and can be mixed with the primary air in the garbage pool and then incinerated. It can be seen from the above examples that the sludge drying waste gas treatment system provided in the present application utilizes the leachate generated in the garbage pool as a spraying solvent to directly spray and condense the drying waste gas, while recovering the heat of the water vapor and returning it to the garbage pool to spray and heat the domestic garbage. The non-condensable gas in the drying waste gas is introduced into the garbage pool and mixed with the primary air in the garbage pool before being incinerated, thereby realizing the waste heat utilization of the drying waste gas and the coordinated disposal of pollutants.

[0027] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of a sludge drying waste gas treatment system provided in an embodiment of the present application.

[0030] Among them, 1 is a drying machine, 2 is a spraying equipment, 21 is a spraying liquid inlet, 22 is a spraying liquid outlet, 23 is a spraying air outlet, 24 is a spraying air inlet, 3 is a garbage pool, 31 is a heating liquid inlet, 32 is a leachate outlet, 33 is a waste gas inlet, 34 is a waste gas outlet, 35 is a first wall, 36 is a second wall, 37 is domestic garbage, 4 is a leachate collection pool, 5 is a pump, 6 is a branch pipeline, 61 is a one-way throttle valve, 7 is an incinerator, 8 is a first induced draft fan, and 9 is a second induced draft fan. DETAILED DESCRIPTION

[0031] The core of this application is to provide a sludge drying waste gas treatment system to achieve the waste heat utilization of the drying waste gas and the coordinated disposal of pollutants.

[0032] Another core of the present application is to provide a method for treating sludge drying waste gas using the above-mentioned sludge drying waste gas treatment system.

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] Incineration of domestic waste is one of the main ways to treat domestic waste, and the scale of waste incineration exceeds 1.1 million tons / day, which is the main way to dispose of domestic waste. At the same time, the municipal sludge produced by municipal sewage treatment plants has complex components and high water content, which can be co-disposed with domestic waste. Since part of the water in the sludge exists in bacteria and cells, the sludge produced from the sewage treatment plant generally has a water content of about 80% after mechanical dehydration, and the calorific value is low. If it is directly put into the furnace for co-incineration with domestic waste, problems such as low furnace temperature and incomplete combustion will occur. Therefore, it is usually necessary to use the steam generated by incineration in the incineration plant to heat dry the sludge and reduce its water content to below 30%~40%. The dry tail gas produced has a low temperature, but a high steam content, and contains dust and corrosive gases such as ammonia, small molecular gaseous hydrocarbons and volatile fatty acids, so the dry tail gas needs to be disposed of.

[0035] In traditional municipal solid waste incineration plants and sludge coordinated disposal, sludge drying tail gas mostly adopts cyclone separators, indirect waste heat exchange and non-condensable gas to primary air to participate in incineration. The heated end of the indirect waste heat exchange is mostly circulating cooling water or part of the condensed water in the thermal system, which wastes the residual heat of the sludge drying tail gas and leads to low utilization rate of the residual heat of the sludge drying tail gas.

[0036] In addition, under condensing conditions, dust accumulation and corrosion are prone to occur on the surface of the heat exchanger, and the temperature of the dried exhaust gas itself is relatively low, resulting in a smaller temperature difference in indirect heat exchange and a lower heat exchange intensity.

[0037] For this reason, Figure 1 As shown, the embodiment of the present application discloses a sludge drying waste gas treatment system, including a drying machine 1, a spraying device 2 and a garbage pool 3. By using the leachate generated in the garbage pool 3 as a spraying solvent, the drying waste gas is directly sprayed and condensed, and the heat of the water vapor is recovered and returned to the garbage pool 3 to spray and heat the domestic garbage 37, and the non-condensable gas in the drying waste gas is introduced into the garbage pool 3 and mixed with the primary air in the garbage pool 3, and then incineration treatment can be carried out, thereby realizing the waste heat utilization of the drying waste gas and the coordinated treatment of pollutants.

[0038] The following will be combined Figure 1 The sludge drying waste gas treatment system disclosed in the embodiment of the present application is specifically explained and illustrated.

[0039] Among them, Figure 1As shown, the drying machine 1 is connected with the spraying device 2 to send the drying waste gas generated by the hot drying sludge into the middle and lower part of the spraying device 2, so that the drying waste gas is sprayed and condensed in the spraying device 2, and the leachate generated by the domestic garbage 37 in the garbage pool 3 can enter the spraying device 2 as a spray solvent to spray and condense the drying waste gas, and the water vapor in the drying waste gas condenses at the bottom of the spraying device 2, and the condensed water and the heated leachate are sent to the garbage pool 3 together, and the domestic garbage 37 in the garbage pool 3 is sprayed and heated to melt the ice cubes that may exist, and the organic waste fermentation of the domestic garbage 37 can be promoted to increase the calorific value of the domestic garbage 37. At the same time, the non-condensable gases such as ammonia and organic sulfide gas in the drying waste gas enter the garbage pool 3, and can be incinerated after being mixed with the primary air in the garbage pool 3, so as to realize the waste heat utilization of the drying waste gas and the coordinated disposal of pollutants. It should be noted that the dryer 1 transfers heat to the sludge by means of heat exchange, using steam, heat transfer oil or other heat media, so that the water in the sludge evaporates, thereby achieving the purpose of reducing the water content of the sludge and generating drying waste gas. Among them, the dryer 1 can be a paddle-type sludge dryer, a horizontal rotary sludge dryer or a vertical disc-type sludge dryer, etc., which is not limited in this article.

[0040] In some embodiments, Figure 1 As shown, the spraying device 2 may include a spraying air inlet 24, a spraying air outlet 23, a spraying liquid inlet 21 and a spraying liquid outlet 22. The spraying air inlet 24 may be arranged at the middle and lower part of the spraying device 2, so that the dryer 1 can be connected with the spraying air inlet 24 of the spraying device 2, thereby sending the drying waste gas generated by the hot drying sludge into the middle and lower part of the spraying device 2, so that the drying waste gas is sprayed and condensed in the spraying device 2. At the same time, the spraying air outlet 23 may be arranged at the middle and upper part of the spraying device 2, so that the non-condensable gas and part of the water vapor are discharged from the middle and upper part of the spraying device 2 to the upper part of the garbage pool 3, and are mixed with the primary air in the garbage pool 3 for incineration treatment. Furthermore, the spray liquid inlet 21 can be arranged at the top of the spray device 2, so that the leachate in the garbage pool 3 can be sent into the spray device 2 through the spray liquid inlet 21 at the top of the spray device 2, so that the leachate can be used as a spray solvent to spray and condense the dried waste gas. In addition, the spray liquid outlet 22 can be arranged at the bottom of the spray device 2, so that the water after the water vapor in the dried waste gas is condensed and the heated leachate can flow from the spray liquid outlet 22 to the garbage pool 3 to spray and heat the domestic waste 37, melt the ice that may exist, and promote the fermentation of organic waste in the domestic waste 37, improve the calorific value of the domestic waste 37, and then increase the input heat of the incineration system, and increase the output of energy such as electricity.

[0041] In some embodiments, Figure 1As shown, the garbage pool 3 is used to store domestic garbage 37, and the garbage pool 3 has a first wall 35 and a second wall 36 arranged opposite to each other, and the domestic garbage 37 in the garbage pool 3 is tilted and stacked from the first wall 35 to the second wall 36. At the same time, the garbage pool 3 includes a heating liquid inlet 31, a leachate outlet 32 ​​and an exhaust gas inlet 33. Among them, the spray liquid outlet 22 of the spraying device 2 is connected with the heating liquid inlet 31 of the garbage pool 3, and the heating liquid inlet 31 is located on the second wall 36, so as to spray and heat the inclined surface of the domestic garbage 37, so as to maximize the contact surface between the water after the condensation of water vapor and the heated leachate and the domestic garbage 37, melt the possible ice cubes, and promote the fermentation of organic waste in the domestic garbage 37, thereby improving the calorific value of the domestic garbage 37. In addition, the leachate outlet 32 ​​of the garbage pool 3 can be set on the second wall 36 of the garbage pool 3, and is located in the middle and lower part of the garbage pool 3, and is connected to the spray liquid inlet 21 at the top of the spray device 2, so that the leachate generated by the domestic garbage 37 in the garbage pool 3 is sent to the spray device 2, so that the leachate is used as a spray solvent to spray and condense the dried waste gas. The waste gas inlet 33 can be set on the second wall 36 of the garbage pool 3, and is located in the middle and upper part of the garbage pool 3, so that the spray gas outlet 23 in the middle and upper part of the spray device 2 can be directly connected to the waste gas inlet 33 of the garbage pool 3, so that the non-condensable gas and part of the water vapor can be discharged to the upper part of the garbage pool 3, and mixed with the primary air above the domestic garbage 37 in the garbage pool 3 for incineration treatment.

[0042] In some embodiments, Figure 1 As shown, a leachate collection tank 4 and a pump 5 are sequentially arranged on the pipeline connecting the leachate outlet 32 ​​of the garbage pool 3 and the spray inlet 21 of the spray device 2, and the leachate collection tank 4 is arranged near the leachate outlet 32 ​​of the garbage pool 3 to collect the leachate generated by the domestic garbage 37 in the garbage pool 3, and at the same time, the leachate in the leachate collection tank 4 is pumped into the spray device 2 through the pump 5, so that the leachate is used as a spray solvent to spray and condense the dried waste gas. In addition, in order to prevent the impurities in the leachate from clogging the pump 5 when entering the pump 5, a filter screen for filtering the leachate is arranged in the pump 5, thereby ensuring the stable operation of the pump 5. In addition, the pipeline connecting the spray outlet 22 of the spray equipment 2 and the heating liquid inlet 31 of the garbage pool 3 is connected between the leachate collection tank 4 and the pump 5 through a branch pipe 6. At the same time, a one-way throttle valve 61 is arranged on the branch pipe 6, so that the temperature in the spray equipment 2 can be controlled by adjusting the opening of the one-way throttle valve 61 and the spray flow rate of the pump 5, so that the temperature in the spray equipment 2 is maintained at 45°C~60°C.

[0043] In some embodiments, Figure 1As shown, the sludge drying waste gas treatment system also includes an incinerator 7, and the garbage pool 3 also includes a waste gas outlet 34. The waste gas outlet 34 can be set on the first wall 35 of the garbage pool 3, and is located in the middle and upper part of the garbage pool 3. The waste gas outlet 34 of the garbage pool 3 is connected to the incinerator 7, so that the non-condensable gas and part of the water vapor are discharged to the upper part of the garbage pool 3, and after mixing with the primary air located above the domestic garbage 37 in the garbage pool 3, they can directly enter the incinerator 7 for incineration.

[0044] In order to ensure smooth gas flow, a first induced draft fan 8 is provided on the pipeline connecting the waste gas outlet 34 of the garbage pool 3 and the incinerator 7, so that the non-condensable gas and part of the water vapor can be mixed with the primary air and sent into the incinerator 7 under the drive of the first induced draft fan 8, thereby ensuring smooth incineration. At the same time, a second induced draft fan 9 is provided on the pipeline connecting the dryer 1 and the spraying equipment 2, so that the drying waste gas generated by the dryer 1 can be sent into the spraying equipment 2 under the drive of the second induced draft fan 9, so as to ensure the stability of the operation of the sludge drying waste gas treatment system.

[0045] It can be seen from the above embodiments that the sludge drying waste gas treatment system provided by the present application is connected with the spray inlet 21 of the spray equipment 2 through the leachate outlet 32 ​​of the garbage pool 3, so that the leachate generated in the garbage pool 3 is used as a spray solvent and enters the spray equipment 2 to directly spray the condensed and dried waste gas. At the same time, the water condensed from the water vapor in the dried waste gas and the heated leachate enter the garbage pool 3 through the pipeline connected to the spray outlet 22 of the spray equipment 2 and the heating inlet 31 of the garbage pool 3, so as to utilize the waste heat of the water vapor to spray and heat the domestic garbage 37 in the garbage pool 3. The heated leachate and the water condensed from the water vapor are sprayed and heated on the domestic garbage 37 at the heating inlet 31 of the garbage pool 3, thereby increasing the calorific value of the fuel, thereby increasing the input heat of the incineration system and increasing the output of energy such as electricity. The condensable pollutants in the dried waste gas are removed to avoid corrosion to the incineration facilities, and the non-condensable gas in the dried waste gas can enter the garbage pool 3 through the pipeline connected to the spray outlet 23 of the spray equipment 2 and the waste gas inlet 33 of the garbage pool 3, and can be mixed with the primary air in the garbage pool 3 and then incinerated, thereby realizing the waste heat utilization of the dried waste gas and the coordinated treatment of pollutants.

[0046] The present application also discloses a method for treating sludge drying waste gas, which uses the sludge drying waste gas treatment system disclosed in the above embodiment, so the sludge drying waste gas treatment system has all the technical effects of the above sludge drying waste gas treatment system, which will not be described in detail herein. The sludge drying waste gas treatment method includes a drying waste gas combustion step, a domestic waste heating step, and a leachate collection step.

[0047] Among them, in the drying waste gas combustion step, the drying waste gas generated by the drying machine 1 is condensed by the spraying device 2, and the non-condensable gas in the drying waste gas enters the garbage pool 3 and is mixed with the primary air for incineration treatment. In addition, in the leachate collection step, the leachate in the garbage pool 3 can be returned to the spraying device 2 to spray and condense the drying waste gas generated by the drying machine 1. At the same time, in the domestic waste heating step, the water after the water vapor in the drying waste gas in the spraying device 2 is condensed and the heated leachate enters the garbage pool 3 to spray and heat the domestic waste 37 in the garbage pool 3, melt the ice cubes that may exist, and promote the fermentation of organic waste in the domestic waste 37, and improve the calorific value of the domestic waste 37, thereby realizing the waste heat utilization of the drying waste gas and the coordinated disposal of pollutants.

[0048] The sludge drying waste gas treatment method also includes a waste gas incineration step. In the waste gas incineration step, the non-condensable gas in the garbage pool 3 is mixed with the primary air and then enters the incinerator 7 for incineration treatment.

[0049] The terms "first" and "second" and the like in the specification and claims of this application and the above drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sludge drying waste gas treatment system, characterized in that: include: A drying machine (1) for thermally drying the sludge to produce drying waste gas; A spray device (2), the spray device (2) being in communication with the drying machine (1) so that the dried waste gas is condensed in the spray device (2), the spray device (2) comprising a spray liquid inlet (21), a spray liquid outlet (22) and a spray gas outlet (23); A garbage pool (3) is used to store domestic garbage (37). The garbage pool (3) comprises a heating liquid inlet (31), a leachate outlet (32) and a waste gas inlet (33). The spray gas outlet (23) of the spray device (2) is connected to the waste gas inlet (33) of the garbage pool (3), so that the non-condensable gas in the dried waste gas enters the garbage pool (3). The leachate outlet (32) of the garbage pool (3) is connected to the spray liquid inlet (21) of the spray device (2), so that the leachate in the garbage pool (3) enters the spray device (2) to spray and condense the dried waste gas in the spray device (2). The spray liquid outlet (22) of the spray device (2) is connected to the heating liquid inlet (31) of the garbage pool (3), so that the condensed water and leachate in the spray device (2) spray and heat the domestic garbage (37) in the garbage pool (3).

2. The sludge drying waste gas treatment system according to claim 1, characterized in that: A leachate collection tank (4) and a pump (5) are sequentially arranged on a pipeline connecting the leachate outlet (32) of the garbage pool (3) and the spray liquid inlet (21) of the spray device (2), and the leachate collection tank (4) is arranged close to the leachate outlet (32) of the garbage pool (3).

3. The sludge drying waste gas treatment system according to claim 2, characterized in that: The pump (5) is provided with a filter screen for filtering the leachate.

4. The sludge drying waste gas treatment system according to claim 2, characterized in that: The pipeline connecting the spraying liquid outlet (22) of the spraying equipment (2) and the heating liquid inlet (31) of the garbage pool (3) is connected between the leachate collection pool (4) and the pump (5) through a branch pipeline (6), and a one-way throttle valve (61) is provided on the branch pipeline (6).

5. The sludge drying waste gas treatment system according to claim 4, characterized in that: The temperature in the spraying device (2) is controlled to be 45° C. to 60° C. by adjusting the opening of the one-way throttle valve (61) and the spraying flow rate of the pump (5).

6. The sludge drying waste gas treatment system according to claim 1, characterized in that: The garbage pool (3) has a first wall surface (35) and a second wall surface (36) arranged opposite to each other, and the domestic garbage (37) in the garbage pool (3) is stacked in an inclined manner from the first wall surface (35) to the second wall surface (36), and the heating liquid inlet (31) is located on the second wall surface (36) so as to spray toward the inclined surface of the domestic garbage (37).

7. The sludge drying waste gas treatment system according to claim 1, characterized in that: It also includes an incinerator (7), and the garbage pool (3) also includes a waste gas outlet (34). The waste gas outlet (34) of the garbage pool (3) is connected to the incinerator (7), so that the non-condensable gas in the garbage pool (3) is mixed with the primary air and then enters the incinerator (7) for incineration.

8. The sludge drying waste gas treatment system according to claim 7, characterized in that: A first induced draft fan (8) is provided on a pipeline connecting the waste gas outlet (34) of the garbage pool (3) and the incinerator (7); and / or, A second induced draft fan (9) is provided on the pipeline connecting the drying machine (1) and the spraying equipment (2).

9. A method for treating sludge drying waste gas, characterized in that: The sludge drying waste gas treatment system according to any one of claims 1 to 8 is used, and the sludge drying waste gas treatment method comprises: The dried waste gas is burned, and the dried waste gas generated by the drying machine (1) is condensed by the spraying device (2), so that the non-condensable gas in the dried waste gas enters the garbage pool (3); Collecting leachate, wherein the leachate in the garbage pool (3) flows back into the spraying device (2) to spray and condense the drying waste gas generated by the drying machine (1); To heat the domestic waste, the water and leachate condensed from the water vapor of the dried waste gas in the spraying device (2) enter the waste pool (3) to spray and heat the domestic waste (37) in the waste pool (3).

10. The method for treating sludge drying waste gas according to claim 9, characterized in that: Also includes: Incineration of waste gas: the non-condensable gas in the garbage pool (3) is mixed with the primary air and then enters the incinerator (7) for incineration.

Images