Flue gas deep waste heat recovery heat supply and process heating system of garbage incinerator

Abstract

The utility model discloses a flue gas deep waste heat recovery heat supply and process heating system for a garbage incinerator, and belongs to the technical field of garbage incineration and waste heat supply. High-temperature and high-humidity flue gas is respectively fed into a front energy saver and a graded flue gas deep waste heat recovery tower for heat exchange and graded utilization, a washing heat exchange section, a medium-temperature heat exchange section and a low-temperature heat exchange section are respectively arranged in the tower from bottom to top, the flue gas is cooled to 7-35 DEG C, and meanwhile, flue gas pollutants are greatly reduced to near zero emission; the heated water is heated to 60-90 DEG C step by step by using the second heat exchanger, the first heat exchanger, the heat pump and the front-mounted energy saver respectively and is heated to 60-90 DEG C by the waste heat of the flue gas at each stage; a first heat exchanger and a front energy saver are adopted for air inlet of the garbage incinerator, and flue gas waste heat of all high-temperature sections is heated to 100-150 DEG C; and heating circulating water of the heating radiators of the building in the plant is heated to 40-70 DEG C step by step through flue gas waste heat of the high and medium temperature sections at all stages respectively by adopting the second heat exchanger and the first heat exchanger.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of garbage incinerator flue gas depth waste heat recovery heating and process heating system, belong to garbage incineration and waste heat heating technical field. BACKGROUND

[0002] There is a large amount of water vapor in the exhaust gas of municipal waste incinerator, and its latent heat and sensible heat are all wasted with exhaust gas. To recover the waste heat of such high-humidity flue gas deeply, the commonly used waste heat utilization methods include: low-low temperature economizer or energy saver with partition, flue gas condensing heat recovery device based on absorption heat pump heat exchange, etc. But the former has problems of corrosion, high cost of heat exchange material, etc. The latter has problems of large amount of driving heat source required by absorption heat pump, high cost leading to long investment recovery period, etc.

[0003] The air inlet of in-plant boiler, process water inlet or the return water of heat network of out-plant urban central heating needs to consume more high-grade heat energy such as steam for heating. If flue gas waste heat is used for heating, a large amount of high-grade heat energy can be saved.

[0004] In addition, the exhaust gas contains a large amount of water vapor, soluble fine particulate matter and other pollutants, so it is necessary to do deep purification and even achieve near-zero emission of flue gas pollutants, and achieve substantial "flue gas white" treatment. UTILITY MODEL CONTENT

[0005] The purpose and task of the utility model is to recover the waste heat of high-temperature and high-humidity flue gas of garbage incinerator by using multi-stage heat exchange method, to heat the heat network water, boiler air inlet or process water inlet, so as to realize deep waste heat recovery and substantial white elimination treatment of boiler exhaust gas.

[0006] The utility model discloses a specific description is: a kind of garbage incinerator flue gas depth waste heat recovery heating and process heating system, including incinerator and its auxiliary machine subsystem and flue gas depth waste heat recovery heating and process heating subsystem two parts, wherein incinerator and its auxiliary machine subsystem include garbage incinerator 101, furnace rear flue gas treatment equipment 102, high temperature warm air heater 103, induced draft fan 104, air supply fan 105, garbage fermentation bin 106, radiator 107, it is characterized in that: the flue gas depth waste heat recovery heating and process heating subsystem includes flue gas depth waste heat recovery tower 1, first heat exchanger 2, second heat exchanger 3, third heat exchanger 4 and flue gas waste heat warm air heater 5, wherein flue gas depth waste heat recovery tower 1 uses vertical integral type grading heat exchange structure, it is from below to above respectively washes heat exchange section 12, medium-temperature heat exchange section 15, low-temperature heat exchange section 17, wherein the lower part of washes heat exchange section 12 is flue gas tower bottom pool 11, the lateral flue gas inlet of washes heat exchange section 12 is communicated with the flue gas pipe of high humidity flue gas J, the upper portion of washes heat exchange section 12 is provided with high-temperature spray device 13, the upper portion of high-temperature spray device 13 is provided with gas-liquid separator 14, the upper portion of gas-liquid separator 14 is medium-temperature heat exchange section 15 for high humidity flue gas L to spray heat exchange, the upper portion of medium-temperature heat exchange section 15 is provided with medium-temperature spray device 16, the upper portion of medium-temperature spray device 16 is low-temperature flue gas M and carries out spray heat exchange, the upper portion of low-temperature heat exchange section 17 is provided with low-temperature spray device 18, the upper portion of low-temperature spray device 18 is provided with flue gas humidity adjusting device 19, the upper portion of flue gas humidity adjusting device 19 is communicated with flue gas outlet section 20, and the low-temperature near-zero emission flue gas N in the flue gas outlet section 20 outlet is communicated with atmosphere;The high-temperature waste heat water outlet of the flue gas tower bottom pool 11 is connected with the high-temperature side import of first heat exchanger 2, and the high-temperature side outlet of first heat exchanger 2 is connected with the water inlet of high-temperature spray device 13, the water outlet of gas-liquid separator 14 is connected with the high-temperature side import of second heat exchanger 3, and the high-temperature side outlet of second heat exchanger 3 is connected with the water inlet of medium-temperature spray device 16, and the high-temperature side outlet of second heat exchanger 3 is also connected with the low-temperature heat source side water inlet of third heat exchanger 4, and the low-temperature heat source side water outlet of third heat exchanger 4 is connected with the water inlet of low-temperature spray device 18;The low-temperature side import of second heat exchanger 3 is communicated with the return water pipe of heated return water H, and the low-temperature side outlet of second heat exchanger 3 is connected with the low-temperature side import of first heat exchanger 2, and the low-temperature side outlet of first heat exchanger 2 is respectively communicated with the water supply pipe of heated water supply G, and is connected with the water inlet of flue gas waste heat warm air heater 5, and the water outlet of flue gas waste heat warm air heater 5 is connected with the low-temperature side import of first heat exchanger 2.

[0007] The third heat exchanger 4 adopts a compression heat pump structure, and is provided with a low-temperature heat source heat exchanger 41 and a high-temperature heat source heat exchanger 42. The low-temperature heat source heat exchanger 41 adopts a compression heat pump evaporator structure, and is provided with low-temperature heat source side water inlets and outlets. The high-temperature heat source heat exchanger 42 adopts a compression heat pump condenser structure, and is provided with high-temperature heat source side water inlets and outlets. The high-temperature heat source side inlet is connected with the high-temperature side outlet of the first heat exchanger 2, and the high-temperature heat source side outlet is communicated with the water supply pipe of the heated water G.

[0008] The third heat exchanger 4 adopts an absorption heat pump structure, and is provided with a low-temperature heat source heat exchanger 41 and a high-temperature heat source heat exchanger 42. The low-temperature heat source heat exchanger 41 adopts an absorption heat pump evaporator structure, and is provided with low-temperature heat source side water inlets and outlets. The high-temperature heat source heat exchanger 42 adopts an absorption heat pump condenser and absorber combined structure, and is provided with high-temperature heat source side water inlets and outlets. The high-temperature heat source side inlet is connected with the high-temperature side outlet of the first heat exchanger 2, and the high-temperature heat source side outlet is communicated with the water supply pipe of the heated water G.

[0009] The high-humidity flue gas J inlet pipe connected with the lateral flue gas inlet of the washing heat exchange section 12 is further provided with a pre-energysaver 6. The water inlet of the pre-energysaver 6 is connected with the low-temperature side outlet of the first heat exchanger 2, and the water outlet of the pre-energysaver 6 is connected with the water inlet of the flue gas waste heat air heater 5 and communicated with the water supply pipe of the heated water G. The air inlet of the flue gas waste heat air heater 5 is connected with the air outlet of the air blower 105, the air inlet of the air blower 105 is communicated with the combustion-supporting air A of the garbage fermentation bin 106, the air outlet of the flue gas waste heat air heater 5 is connected with the air inlet of the high-temperature air heater 103 through the flue gas preheating air pipe, the air inlet of the high-temperature air heater 103 is connected with the air inlet of the garbage incinerator 101 through the high-temperature air inlet pipe, the high-temperature side inlet of the high-temperature air heater 103 is connected with the main pipe of the high-temperature heat source flow B1, the high-temperature side outlet of the high-temperature air heater 103 is connected with the main pipe of the high-temperature heat source flow B2, the original flue gas E outlet of the garbage incinerator 101 is connected with the flue gas inlet of the post-incinerator flue gas treatment device 102, the flue gas outlet of the post-incinerator flue gas treatment device 102 is connected with the flue gas inlet of the induced draft fan 104, and the flue gas outlet of the induced draft fan 104 is connected with the flue gas inlet of the pre-energysaver 6 through the original flue gas pipe.

[0010] The water inlets and outlets of the pre-energysaver 6 and the high-temperature heat source heat exchanger 42 of the third heat exchanger 4 adopt a parallel structure or a series structure. If the series structure is adopted, the water inlet of the pre-energysaver 6 is connected with the water outlet of the high-temperature heat source heat exchanger 42, or the water outlet of the pre-energysaver 6 is connected with the water inlet of the high-temperature heat source heat exchanger 42.

[0011] The water inlet of the radiator 107 is connected with the low-temperature side outlet of the first heat exchanger 2, and the water outlet of the radiator 107 is connected with the low-temperature side inlet of the second heat exchanger 3.

[0012] The flue gas tower bottom pool 11 is further provided with a dosing opening connected with the discharge opening of the water quality adjusting device 7, and the water quality adjusting device 7 is further provided with a water quality adjusting agent K feeding opening.

[0013] The washing heat exchange section 12, the medium temperature heat exchange section 15 and the low temperature heat exchange section 17 are vertical counter-flow heat exchange structures composed of flue gas and spraying water, wherein an empty section or a filler structure is used inside.

[0014] The washing heat exchange section 12, the medium temperature heat exchange section 15 and the low temperature heat exchange section 17 adopt single-layer groove tray water distribution structure, groove structure or water distribution structure composed of N layers of spraying structure, wherein N is greater than or equal to 1.

[0015] The flue gas waste heat air heater 5 and the front energy saver 6 adopt fluoroplastic coil heat exchanger, carbon-based material coil heat exchanger, fluoroplastic steel coil heat exchanger, stainless steel heat exchanger or ND steel heat exchanger structure for preventing corrosion on the air and smoke side.

[0016] The flue gas waste heat air heater 5 and the front energy saver 6 adopt fluoroplastic coil heat exchanger, carbon-based material coil heat exchanger, fluoroplastic steel coil heat exchanger, stainless steel heat exchanger or ND steel heat exchanger structure for preventing corrosion on the air and smoke side. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a system schematic diagram of the utility model.

[0018] Figure 1 The numbers and names of the components in the drawings are as follows.

[0019] The flue gas deep waste heat recovery tower 1, the first heat exchanger 2, the second heat exchanger 3, the third heat exchanger 4, the flue gas waste heat air heater 5, the front energy economizer 6, the water quality adjusting device 7, the flue gas tower bottom water pool 11, the flue gas inlet pipe of the washing heat exchange section 12 are communicated, the washing heat exchange section 12, the high-temperature spraying device 13, the gas-liquid separator 14, the medium-temperature heat exchange section 15, the medium-temperature spraying device 16, the low-temperature heat exchange section 17, the low-temperature spraying device 18, the flue gas humidity adjusting device 19, the flue gas outlet section 20, the low-temperature heat source heat exchanger 41, the high-temperature heat source heat exchanger 42, the waste incinerator 101, the post-furnace flue gas treatment equipment 102, the high-temperature air heater 103, the induced draft fan 104, the supply fan 105, the waste fermentation bin 106, the radiator 107, the combustion air A, the high-temperature heat source incoming flow B1, the high-temperature heat source outgoing flow B2, the flue gas preheated air C, the high-temperature incoming air D, the original flue gas E, the original flue gas discharge F, the heated water supply G, the heated water return H, the high-humidity flue gas J, the water quality adjusting agent K, the medium-temperature high-humidity flue gas L, the medium-low-temperature flue gas M, and the low-temperature near-zero emission flue gas N. DETAILED DESCRIPTION

[0020] Figure 1 The system schematic diagram and the embodiment of the utility model are as follows.

[0021] The specific embodiment 1 of the utility model is as follows.

[0022] The utility model discloses a specific description is: a kind of garbage incinerator flue gas depth waste heat recovery heating and process heating system, including incinerator and its auxiliary machine subsystem and flue gas depth waste heat recovery heating and process heating subsystem two parts, wherein incinerator and its auxiliary machine subsystem include garbage incinerator 101, furnace rear flue gas treatment equipment 102, high temperature warm air heater 103, induced draft fan 104, air supply fan 105, garbage fermentation bin 106, radiator 107, it is characterized in that: the flue gas depth waste heat recovery heating and process heating subsystem includes flue gas depth waste heat recovery tower 1, first heat exchanger 2, second heat exchanger 3, third heat exchanger 4 and flue gas waste heat warm air heater 5, wherein flue gas depth waste heat recovery tower 1 uses vertical integral type grading heat exchange structure, it is from below to above respectively washes heat exchange section 12, medium-temperature heat exchange section 15, low-temperature heat exchange section 17, wherein the lower part of washes heat exchange section 12 is flue gas tower bottom pool 11, the lateral flue gas inlet of washes heat exchange section 12 is communicated with the flue gas pipe of high humidity flue gas J, the upper portion of washes heat exchange section 12 is provided with high-temperature spray device 13, the upper portion of high-temperature spray device 13 is provided with gas-liquid separator 14, the upper portion of gas-liquid separator 14 is medium-temperature heat exchange section 15 for high humidity flue gas L to spray heat exchange, the upper portion of medium-temperature heat exchange section 15 is provided with medium-temperature spray device 16, the upper portion of medium-temperature spray device 16 is low-temperature flue gas M and carries out spray heat exchange, the upper portion of low-temperature heat exchange section 17 is provided with low-temperature spray device 18, the upper portion of low-temperature spray device 18 is provided with flue gas humidity adjusting device 19, the upper portion of flue gas humidity adjusting device 19 is communicated with flue gas outlet section 20, and the low-temperature near-zero emission flue gas N in the flue gas outlet section 20 outlet is communicated with atmosphere;The high-temperature waste heat water outlet of the flue gas tower bottom pool 11 is connected with the high-temperature side import of first heat exchanger 2, and the high-temperature side outlet of first heat exchanger 2 is connected with the water inlet of high-temperature spray device 13, the water outlet of gas-liquid separator 14 is connected with the high-temperature side import of second heat exchanger 3, and the high-temperature side outlet of second heat exchanger 3 is connected with the water inlet of medium-temperature spray device 16, and the high-temperature side outlet of second heat exchanger 3 is also connected with the low-temperature heat source side water inlet of third heat exchanger 4, and the low-temperature heat source side water outlet of third heat exchanger 4 is connected with the water inlet of low-temperature spray device 18;The low-temperature side import of second heat exchanger 3 is communicated with the return water pipe of heated return water H, and the low-temperature side outlet of second heat exchanger 3 is connected with the low-temperature side import of first heat exchanger 2, and the low-temperature side outlet of first heat exchanger 2 is respectively communicated with the water supply pipe of heated water supply G, and is connected with the water inlet of flue gas waste heat warm air heater 5, and the water outlet of flue gas waste heat warm air heater 5 is connected with the low-temperature side import of first heat exchanger 2.

[0023] The third heat exchanger 4 adopts a compression heat pump structure, and is provided with a low-temperature heat source heat exchanger 41 and a high-temperature heat source heat exchanger 42. The low-temperature heat source heat exchanger 41 adopts a compression heat pump evaporator structure, and is provided with low-temperature heat source side water inlets and outlets. The high-temperature heat source heat exchanger 42 adopts a compression heat pump condenser structure, and is provided with high-temperature heat source side water inlets and outlets. The high-temperature heat source side inlet is connected with the high-temperature side outlet of the first heat exchanger 2, and the high-temperature heat source side outlet is communicated with the water supply pipe of the heated water G.

[0024] The third heat exchanger 4 adopts an absorption heat pump structure, and is provided with a low-temperature heat source heat exchanger 41 and a high-temperature heat source heat exchanger 42. The low-temperature heat source heat exchanger 41 adopts an absorption heat pump evaporator structure, and is provided with low-temperature heat source side water inlets and outlets. The high-temperature heat source heat exchanger 42 adopts an absorption heat pump condenser and absorber combined structure, and is provided with high-temperature heat source side water inlets and outlets. The high-temperature heat source side inlet is connected with the high-temperature side outlet of the first heat exchanger 2, and the high-temperature heat source side outlet is communicated with the water supply pipe of the heated water G.

[0025] The high-humidity flue gas J inlet pipe connected with the lateral flue gas inlet of the washing heat exchange section 12 is further provided with a pre-energysaver 6. The water inlet of the pre-energysaver 6 is connected with the low-temperature side outlet of the first heat exchanger 2, and the water outlet of the pre-energysaver 6 is connected with the water inlet of the flue gas waste heat air heater 5 and communicated with the water supply pipe of the heated water G. The air inlet of the flue gas waste heat air heater 5 is connected with the air outlet of the air blower 105, the air inlet of the air blower 105 is communicated with the combustion-supporting air A of the garbage fermentation bin 106, the air outlet of the flue gas waste heat air heater 5 is connected with the air inlet of the high-temperature air heater 103 through the flue gas preheating air pipe, the air inlet of the high-temperature air heater 103 is connected with the air inlet of the garbage incinerator 101 through the high-temperature air inlet pipe, the high-temperature side inlet of the high-temperature air heater 103 is connected with the main pipe of the high-temperature heat source flow B1, the high-temperature side outlet of the high-temperature air heater 103 is connected with the main pipe of the high-temperature heat source flow B2, the original flue gas E outlet of the garbage incinerator 101 is connected with the flue gas inlet of the post-incinerator flue gas treatment device 102, the flue gas outlet of the post-incinerator flue gas treatment device 102 is connected with the flue gas inlet of the induced draft fan 104, and the flue gas outlet of the induced draft fan 104 is connected with the flue gas inlet of the pre-energysaver 6 through the original flue gas pipe.

[0026] The water inlets and outlets of the pre-energysaver 6 and the high-temperature heat source heat exchanger 42 of the third heat exchanger 4 adopt a parallel structure or a series structure. If the series structure is adopted, the water inlet of the pre-energysaver 6 is connected with the water outlet of the high-temperature heat source heat exchanger 42, or the water outlet of the pre-energysaver 6 is connected with the water inlet of the high-temperature heat source heat exchanger 42.

[0027] The water inlet of the radiator 107 is connected with the low-temperature side outlet of the first heat exchanger 2, and the water outlet of the radiator 107 is connected with the low-temperature side inlet of the second heat exchanger 3.

[0028] The flue gas tower bottom water pool 11 is further provided with a dosing opening, the dosing opening is connected with the discharge opening of the water quality adjusting device 7, and the water quality adjusting device 7 is further provided with a water quality adjusting agent K feeding opening.

[0029] The washing heat exchange section 12, the medium temperature heat exchange section 15 and the low temperature heat exchange section 17 are vertical arranged countercurrent heat exchange structures composed of flue gas and spraying water, wherein an empty section or a filler structure is adopted inside.

[0030] The washing heat exchange section 12, the medium temperature heat exchange section 15 and the low temperature heat exchange section 17 adopt single layer groove tray water distribution structure, groove structure or water distribution structure composed of N layers of spraying structure, wherein N is greater than or equal to 1.

[0031] The flue gas waste heat air heater 5 and the front energy economizer 6 adopt fluorine plastic coil heat exchanger, carbon-based material coil heat exchanger, fluorine plastic steel coil heat exchanger, stainless steel heat exchanger or ND steel heat exchanger structure with wind smoke side corrosion resistance.

[0032] It should be noted that the utility model provides an integrated flue gas waste heat recovery unit structure to realize deep condensation heat recovery of boiler flue gas and to be used for heating and humidifying boiler air inlet and heating heated water, and according to the overall solution, different specific implementation measures and different structure specific implementation devices can be used, the above specific implementation mode is only one of them, any other similar simple transformation mode, for example, increasing or reducing one or two levels in the multi-stage heat exchanger, simple adjustment of the series or parallel relationship between the levels on the heated water side, using different heat exchange element structures and simple transformation thereof, or simply adjusting the waste heat water inlet and outlet water parameters and the number of stages, or the transformation mode that can be thought of by ordinary professionals, etc., or applying the technical mode to different flue gas or exhaust air types and other similar application occasions with the same or similar structure, all fall within the protection scope of the utility model.

Claims

1. A waste incinerator flue gas deep waste heat recovery heating and process heating system, comprising a waste incinerator and its auxiliary subsystem and a flue gas deep waste heat recovery heating and process heating subsystem two parts, wherein the waste incinerator and its auxiliary subsystem comprises a waste incinerator (101), a post-furnace flue gas treatment device (102), a high-temperature warm air blower (103), an induced draft fan (104), a forced draft fan (105), a waste fermentation bin (106), and a radiator (107), characterized in that: The flue gas deep waste heat recovery heating and process heating subsystem comprises a flue gas deep waste heat recovery tower (1), a first heat exchanger (2), a second heat exchanger (3), a third heat exchanger (4) and a flue gas waste heat air heater (5), wherein the flue gas deep waste heat recovery tower (1) adopts a vertical integral type staged heat exchange structure, which comprises a washing heat exchange section (12), a medium temperature heat exchange section (15) and a low temperature heat exchange section (17) from bottom to top, wherein the lower part of the washing heat exchange section (12) is a flue gas tower bottom pool (11), the lateral flue gas inlet of the washing heat exchange section (12) is communicated with a high humidity flue gas (J) inlet pipe, the upper part of the washing heat exchange section (12) is provided with a high temperature spraying device (13), the upper part of the high temperature spraying device (13) is provided with a gas-liquid separator (14), the upper part of the gas-liquid separator (14) is the medium temperature heat exchange section (15) for spraying heat exchange of medium temperature high humidity flue gas (L), the upper part of the medium temperature heat exchange section (15) is provided with a medium temperature spraying device (16), the upper part of the medium temperature spraying device (16) is the low temperature heat exchange section (17) for spraying heat exchange of medium-low temperature flue gas (M), the upper part of the low temperature heat exchange section (17) is provided with a low temperature spraying device (18), the upper part of the low temperature spraying device (18) is provided with a flue gas humidity adjusting device (19), the upper part of the flue gas humidity adjusting device (19) is communicated with a flue gas outlet section (20), and the low temperature near zero emission flue gas (N) at the flue gas outlet of the flue gas outlet section (20) is communicated with the atmosphere; the high temperature waste heat water outlet of the flue gas tower bottom pool (11) is connected with the high temperature side inlet of the first heat exchanger (2), the high temperature side outlet of the first heat exchanger (2) is connected with the water inlet of the high temperature spraying device (13), the water outlet of the gas-liquid separator (14) is connected with the high temperature side inlet of the second heat exchanger (3), the high temperature side outlet of the second heat exchanger (3) is connected with the water inlet of the medium temperature spraying device (16), the high temperature side outlet of the second heat exchanger (3) is also connected with the low temperature heat source side water inlet of the third heat exchanger (4), and the low temperature heat source side water outlet of the third heat exchanger (4) is connected with the water inlet of the low temperature spraying device (18); the low temperature side inlet of the second heat exchanger (3) is communicated with a return water pipe of heated return water (H), the low temperature side outlet of the second heat exchanger (3) is connected with the low temperature side inlet of the first heat exchanger (2), the low temperature side outlet of the first heat exchanger (2) is respectively communicated with a water supply pipe of heated water supply (G) and connected with the water inlet of the flue gas waste heat air heater (5), and the water outlet of the flue gas waste heat air heater (5) is connected with the low temperature side inlet of the first heat exchanger (2).

2. A system for deep waste incinerator flue gas waste heat recovery for heating and process heating according to claim 1, characterized in that The third heat exchanger (4) adopts an electric compression heat pump structure and is provided with a low-temperature heat source heat exchanger (41) and a high-temperature heat source heat exchanger (42), wherein the low-temperature heat source heat exchanger (41) adopts a compression heat pump evaporator structure and is provided with low-temperature heat source side water inlets and outlets; the high-temperature heat source heat exchanger (42) adopts a compression heat pump condenser structure and is provided with high-temperature heat source side water inlets and outlets, wherein the high-temperature heat source side inlet is connected with the high-temperature side outlet of the first heat exchanger (2), and the high-temperature heat source side outlet is communicated with a water supply pipe of the heated water (G).

3. A system for deep waste incinerator flue gas waste heat recovery for heating and process heating according to claim 1, characterized in that The third heat exchanger (4) adopts an absorption heat pump structure and is provided with a low-temperature heat source heat exchanger (41) and a high-temperature heat source heat exchanger (42), wherein the low-temperature heat source heat exchanger (41) adopts an absorption heat pump evaporator structure and is provided with low-temperature heat source side water inlets and outlets; the high-temperature heat source heat exchanger (42) adopts an absorption heat pump condenser and absorber combined structure and is provided with high-temperature heat source side water inlets and outlets, wherein the high-temperature heat source side inlet is connected with the high-temperature side outlet of the first heat exchanger (2), and the high-temperature heat source side outlet is communicated with a water supply pipe of the heated water (G).

4. A system for deep waste incinerator flue gas waste heat recovery for heating and process heating according to claim 1, characterized in that The high-humidity flue gas (J) inlet pipe connected with the lateral flue gas inlet of the washing heat exchange section (12) is further provided with a pre-energysaver (6), the water inlet of the pre-energysaver (6) is connected with the low-temperature side outlet of the first heat exchanger (2), the water outlet of the pre-energysaver (6) is connected with the water inlet of the flue gas waste heat air heater (5) and communicated with the water supply pipe of the heated water (G); the air inlet of the flue gas waste heat air heater (5) is connected with the air outlet of the air blower (105), the air inlet of the air blower (105) is communicated with the combustion-supporting air (A) of the garbage fermentation bin (106), the air outlet of the flue gas waste heat air heater (5) is connected with the air inlet of the high-temperature air heater (103) through the air pipe of the flue gas preheating air (C), the air outlet of the high-temperature air heater (103) is connected with the air inlet of the garbage incinerator (101) through the air pipe of the high-temperature air (D), the high-temperature side inlet of the high-temperature air heater (103) is connected with the main pipe of the high-temperature heat source flow (B1), the high-temperature side outlet of the high-temperature air heater (103) is connected with the main pipe of the high-temperature heat source return flow (B2), the outlet of the original flue gas (E) of the garbage incinerator (101) is connected with the flue gas inlet of the post-incinerator flue gas treatment device (102), the flue gas outlet of the post-incinerator flue gas treatment device (102) is connected with the flue gas inlet of the induced draft fan (104), and the flue gas outlet of the induced draft fan (104) is connected with the flue gas inlet of the pre-energysaver (6) through the air pipe of the original flue gas (F).

5. A system for deep waste incinerator flue gas waste heat recovery for heating and process heating according to claim 4, characterized in that The water inlets and outlets of the pre-energysaver (6) and the high-temperature heat source heat exchanger (42) of the third heat exchanger (4) adopt a parallel structure or a series structure; if a series structure is adopted, the water inlet of the pre-energysaver (6) is connected with the water outlet of the high-temperature heat source heat exchanger (42), or the water outlet of the pre-energysaver (6) is connected with the water inlet of the high-temperature heat source heat exchanger (42).

6. A system for deep waste incinerator flue gas waste heat recovery for heating and process heating according to claim 1, characterized in that The water inlet of the radiator (107) is connected with the low-temperature side outlet of the first heat exchanger (2), and the water outlet of the radiator (107) is connected with the low-temperature side inlet of the second heat exchanger (3).

7. A system for deep waste incinerator flue gas heat recovery and process heating according to claim 1, wherein The flue gas tower bottom pool (11) is also provided with a dosing port connected with the discharge port of the water quality adjusting device (7), and the water quality adjusting device (7) is also provided with a feed port of a water quality adjusting agent (K).

8. A system for deep waste incinerator flue gas waste heat recovery for heating and process heating according to claim 1, characterized in that The washing heat exchange section (12), the medium-temperature heat exchange section (15) and the low-temperature heat exchange section (17) are countercurrent heat exchange structures arranged vertically and composed of flue gas and spraying water, wherein an empty section or a filler structure is adopted inside.

9. A system for deep waste incinerator flue gas waste heat recovery for heating and process heating according to claim 1, characterized in that The washing heat exchange section (12), the medium-temperature heat exchange section (15) and the low-temperature heat exchange section (17) adopt a single-layer water distribution structure, a groove type structure or a water distribution structure composed of N layers of spraying structures, wherein N is greater than or equal to 1.

10. A system for deep waste incinerator flue gas waste heat recovery for heating and process heating according to claim 1, characterized in that The flue gas waste heat air heater (5) and the front energy-saving device (6) adopt a fluoroplastic coil heat exchanger, a carbon-based material coil heat exchanger, a fluoroplastic steel coil heat exchanger, a stainless steel heat exchanger or an ND steel heat exchanger structure for preventing corrosion on the air and flue gas sides.

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