High-temperature flue gas waste heat recovery and evaporation device for generator set boiler

Abstract

The utility model belongs to the technical field of waste heat utilization of biogas power generation systems, and particularly relates to a high-temperature flue gas waste heat recovery and evaporation device for a generator set boiler, which comprises a generator body. Through the arrangement of the generator body, biogas in the biogas engine can be driven through the connecting pipeline, demineralized water input through the demineralized water device can be heated to about 80 DEG C through the water-cooling heat exchanger, and heat of circulating water entering the water-cooling heat exchanger is fully absorbed; gas in the biogas engine can enter the smoke exhaust heat exchanger for heat exchange through the first gas conveying pipe by means of the demineralized water device in the waste heat boiler, after the gas passes through the smoke exhaust heat exchanger, heat of smoke is absorbed, the temperature of demineralized water is increased to about 110 DEG C, the temperature of smoke exhausted into the atmosphere is reduced to about 90 DEG C, and the heat exchange efficiency is improved. The waste heat utilization efficiency of the high-temperature flue gas waste heat recovery evaporation device for the generator set boiler is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat utilization of a biogas power generation system, in particular to a device for recovering and evaporating waste heat of high-temperature flue gas from a boiler of a generator set. Background Art

[0002] Biogas power generation system is a power generation system that uses biogas to generate electricity. It is mainly composed of biogas generator sets, generators and heat recovery devices. Its principle is to supply biogas to gas generator sets through gas storage tanks via desulfurizers, thereby driving the generator connected to the biogas internal combustion engine to generate electricity. The heat in the cooling water and exhaust gas discharged by the biogas generator set is recovered through the heat recovery device and can be used to heat the biogas generator or provide hot water or steam. The thermal efficiency of the biogas power generation system can reach more than 80%, so it has a high energy utilization efficiency.

[0003] In the existing technology, the waste heat utilization of biogas power generation system is that the moving parts of the biogas engine generate a lot of heat during the work process. In order to cool the heat-generating parts of the cylinder liner, the water circulation cooling system of the engine absorbs the cooling water (cylinder liner water) of the parts, and then dissipates the heat through the air-cooled heat exchanger. This part of the heat is discharged into the atmosphere in vain, which not only wastes heat energy but also increases greenhouse gas emissions, pollutes the environment and wastes fossil energy. At this time, it is necessary to use the high-temperature flue gas waste heat recovery evaporation device of the generator set boiler.

[0004] During long-term observation, it was found that the high-temperature flue gas (about 490°C) generated by the engine of the existing generator set boiler high-temperature flue gas waste heat recovery evaporation device for biogas power generation was still around 135°C after the waste heat boiler absorbed heat to produce steam. The higher exhaust temperature reduced the thermal efficiency of the boiler, causing energy waste and affecting the utilization efficiency of the waste heat.

[0005] To this end, the utility model provides a high-temperature flue gas waste heat recovery evaporation device for a generator set boiler. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve at least one of the problems raised in the background technology, a device for recovering waste heat from high-temperature flue gas of a generator set boiler is proposed.

[0007] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes a device for recovering and evaporating waste heat from high-temperature flue gas of a generator set boiler, comprising a generator body; the output end of the generator body is connected to a connecting pipe; the generator body and a biogas engine are connected through a connecting pipe; a first delivery pipe is arranged on the side wall of the biogas engine; an engine air-cooled heat exchanger is installed at the output port of the first delivery pipe; a second delivery pipe is connected to the other side wall of the biogas engine; a water-cooled heat exchanger is connected to the output end of the second delivery pipe; a third delivery pipe is connected between the water-cooled heat exchanger and the biogas engine; the third delivery pipe passes through the middle of the engine air-cooled heat exchanger; a first gas delivery pipe is connected to the other side wall of the biogas engine; a waste heat boiler is sleeved on the side wall of the first gas delivery pipe; the output end of the first gas delivery pipe is connected to the second gas delivery pipe; the side wall of the second gas delivery pipe is sleeved with an exhaust gas heat exchanger; the side wall of the exhaust gas heat exchanger is connected to the first gas delivery pipe a cooling water inlet pipe; a first cooling water outlet pipe is connected to the other side wall of the smoke exhaust heat exchanger; an exhaust pipe is fixedly connected to the top of the smoke exhaust heat exchanger; a desalted water device is arranged on the top of the water-cooled heat exchanger; the desalted water device passes through the middle of the smoke exhaust heat exchanger; this step can drive the biogas inside the biogas engine through the connecting pipe through the setting of the generator body, and the desalted water input through the desalted water device can be heated to about 80°C through the water-cooled heat exchanger, and the heat of the circulating water entering the water-cooled heat exchanger can be fully absorbed, and the gas inside the biogas engine can be passed through the waste heat boiler through the first gas pipeline. The desalted water device enters the smoke exhaust heat exchanger for heat exchange, and after passing through the smoke exhaust heat exchanger, the heat of the flue gas is absorbed, and the temperature of the desalted water rises to about 110°C, so that the temperature of the smoke discharged into the atmosphere is reduced to about 90°C, thereby enhancing the waste heat utilization efficiency of a waste heat recovery evaporation device for high-temperature flue gas from a generator set boiler.

[0008] Preferably, the desalted water device includes a desalted water input pipe; a desalted water input pipe is provided at the top of the water-cooled heat exchanger; the output end of the desalted water input pipe passes through the middle of the water-cooled heat exchanger and the smoke exhaust heat exchanger; a steam exhaust pipe is provided at the top of the waste heat boiler; a first valve is installed in the middle of the steam exhaust pipe; in this step, through the provision of the desalted water input pipe, the desalted water can enter the water-cooled heat exchanger for heat exchange to heat the circulating water inside its second delivery pipe. The desalted water delivery pipe can be used to allow the desalted water to exchange heat inside the smoke exhaust heat exchanger to cool the flue gas inside the waste heat boiler, and the gas generated by the cooling can be discharged from the waste heat boiler through the desalted water input pipe. The discharge speed of the steam exhaust pipe can be controlled by the first valve, further enhancing the flue gas emission effect of a waste heat recovery evaporation device for high-temperature flue gas from a generator set boiler.

[0009] Preferably, a cooling water chamber is provided inside the water-cooled heat exchanger; a second cooling water inlet pipe is connected to the top of the cooling water chamber; a second cooling water outlet pipe is connected to the other side of the top of the cooling water chamber; a partition is provided inside the water-cooled heat exchanger; the partitions are evenly distributed inside the water-cooled heat exchanger; a hot water drain valve is installed on the bottom side wall of the water-cooled heat exchanger; a cold water drain valve is installed on the bottom of the water-cooled heat exchanger; the cold water drain valve is arranged below the hot water drain valve; a circulating water outlet pipe is provided on the top side wall of the water-cooled heat exchanger; the circulating water outlet pipe is arranged on the hot water drain The second cooling water outlet pipe is used to discharge the used cooling water from the boiler to the outside, thereby further enhancing the cooling and discharging effect of the high-temperature flue gas waste heat recovery evaporator of the generator set boiler.

[0010] Preferably, the liquid inside the biogas engine flows toward the water-cooled heat exchanger through the second delivery pipe; the liquid cooled inside the water-cooled heat exchanger passes through the middle of the engine air-cooled heat exchanger through the third delivery pipe; the liquid inside the third delivery pipe flows toward the inside of the biogas engine; this step can enable the circulating water to continuously cool the inside of the biogas engine through the arrangement of the second delivery pipe and the third delivery pipe, further enhancing the circulation effect of a high-temperature flue gas waste heat recovery evaporation device of a generator set boiler.

[0011] Preferably, the desalted water delivery pipe passes through the top of the side wall of the smoke exhaust heat exchanger; the desalted water delivery pipe passes out from the bottom of the smoke exhaust heat exchanger; in this step, the desalted water delivery pipe passes through the top of the smoke exhaust heat exchanger, so that the desalted water can be heated by the flue gas that has completed heat exchange inside the smoke exhaust heat exchanger, and the desalted water delivery pipe passing through the bottom of the smoke exhaust heat exchanger can be used to cool the flue gas inside the waste heat boiler after utilizing the waste heat, thereby further enhancing the waste heat utilization effect of the waste heat recovery evaporation device of the high-temperature flue gas waste heat of the generator set boiler.

[0012] Preferably, the cooling water chamber is arranged above the partition; a partition is arranged in the middle of the cooling water chamber; this step can make the coolant more comprehensively spread inside the water-cooled heat exchanger through the arrangement of the cooling water chamber and the partition to cool the liquid entering the water-cooled heat exchanger, further enhancing the cooling uniformity effect of the high-temperature flue gas waste heat recovery evaporation device of the generator set boiler.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The utility model describes a waste heat recovery evaporation device for high-temperature flue gas from a generator set boiler. The arrangement of the generator body can drive the biogas inside the biogas engine through a connecting pipe. The desalted water input through the desalted water device can be heated to about 80°C through a water-cooled heat exchanger, and the heat of the circulating water entering the water-cooled heat exchanger can be fully absorbed. The gas inside the biogas engine can enter the exhaust gas heat exchanger through the waste heat boiler through the first gas pipe using the desalted water device for heat exchange. After passing through the exhaust gas heat exchanger, the heat of the flue gas is absorbed, and the temperature of the desalted water is increased to about 110°C, so that the temperature of the flue gas discharged into the atmosphere is reduced to about 90°C, thereby enhancing the waste heat utilization efficiency of a waste heat recovery evaporation device for high-temperature flue gas from a generator set boiler.

[0015] 2. The utility model discloses a generator set boiler high-temperature flue gas waste heat recovery evaporation device, which includes a desalted water input pipe through the desalted water device; a desalted water input pipe is provided on the top of the water-cooled heat exchanger; the output end of the desalted water input pipe passes through the middle of the water-cooled heat exchanger and the smoke exhaust heat exchanger; a steam exhaust pipe is provided on the top of the waste heat boiler; a first valve is installed in the middle of the steam exhaust pipe; this step, through the provision of the desalted water input pipe, can allow the desalted water to enter the water-cooled heat exchanger for heat exchange to heat the circulating water inside its second delivery pipe. The desalted water delivery pipe can be used to allow the desalted water to exchange heat inside the smoke exhaust heat exchanger to cool the flue gas inside the waste heat boiler, and the gas generated by cooling can be discharged from the waste heat boiler through the desalted water input pipe. The discharge speed of the steam exhaust pipe can be controlled through the first valve, further enhancing the flue gas emission effect of a generator set boiler high-temperature flue gas waste heat recovery evaporation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a stereogram in the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the water-cooled heat exchanger in the utility model;

[0019] Figure 3 It is a schematic diagram of the partition structure in the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the smoke exhaust heat exchanger in the utility model;

[0021] Figure 5 It is a schematic diagram of the internal structure of the smoke exhaust heat exchanger in the utility model;

[0022] Legend:

[0023] 1. Generator body; 11. Connecting pipes; 12. Biogas engine; 13. First delivery pipe; 14. Engine air-cooled heat exchanger; 15. Second delivery pipe; 16. Water-cooled heat exchanger; 17. Third delivery pipe; 18. First gas pipe; 19. Waste heat boiler; 101. Second gas pipe; 102. Smoke exhaust heat exchanger; 103. First cooling water inlet pipe; 104. First cooling water outlet pipe; 105. Exhaust pipe; 2. Demineralized water inlet pipe; 21. Demineralized water delivery pipe; 22. Steam outlet pipe; 23. First valve; 3. Cooling water chamber; 31. Partition; 32. Hot water drain valve; 33. Cold water drain valve; 35. Circulating water outlet pipe; 36. Circulating water inlet pipe; 37. Second cooling water inlet pipe; 38. Second cooling water outlet pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Specific examples are given below.

[0026] like Figures 1 to 5As shown, a generator set boiler high-temperature flue gas waste heat recovery evaporation device described in an embodiment of the utility model comprises a generator body 1; the output end of the generator body 1 is connected to a connecting pipe 11; the generator body 1 and a biogas engine 12 are connected through the connecting pipe 11; a first delivery pipe 13 is provided on the side wall of the biogas engine 12; an engine air-cooled heat exchanger 14 is installed at the output port of the first delivery pipe 13; a second delivery pipe 15 is connected to the other side wall of the biogas engine 12; the output end of the second delivery pipe 15 is connected to a water-cooled heat exchanger 16; a third delivery pipe 17 is connected between the water-cooled heat exchanger 16 and the biogas engine 12; the third delivery pipe 17 is connected from The engine air-cooled heat exchanger 14 passes through the middle; the other side wall of the biogas engine 12 is connected to the first gas pipe 18; the side wall of the first gas pipe 18 is sheathed with a waste heat boiler 19; the output end of the first gas pipe 18 is connected to the second gas pipe 101; the side wall of the second gas pipe 101 is sheathed with a smoke exhaust heat exchanger 102; the side wall of the smoke exhaust heat exchanger 102 is connected to the first cooling water inlet pipe 103; the other side wall of the smoke exhaust heat exchanger 102 is connected to the first cooling water outlet pipe 104; the top of the smoke exhaust heat exchanger 102 is fixedly connected with an exhaust pipe 105; the top of the water-cooled heat exchanger 16 is provided with a desalted water device; the desalted water device passes through the middle of the smoke exhaust heat exchanger 102; when working The generator body 1 can drive the biogas inside the biogas engine 12 through the connecting pipe 11, and the desalted water input through the desalted water device can be heated to about 80°C through the water-cooled heat exchanger 16, and the heat of the circulating water entering the water-cooled heat exchanger 16 can be fully absorbed. The gas inside the biogas engine 12 can enter the exhaust gas heat exchanger 102 through the waste heat boiler 19 through the first gas pipe 18 to exchange heat. After passing through the exhaust gas heat exchanger 102, the heat of the flue gas is absorbed, and the temperature of the desalted water is increased to about 110°C, so that the temperature of the flue gas discharged into the atmosphere is reduced to about 90°C; this step can be achieved through the setting of the generator body 1. The biogas in the biogas engine 12 is driven through the connecting pipe 11, and the desalted water input through the desalted water device can be heated to about 80°C through the water-cooled heat exchanger 16, and the heat of the circulating water entering the water-cooled heat exchanger 16 is fully absorbed. The gas in the biogas engine 12 can pass through the waste heat boiler 19 through the first gas pipe 18 and enter the flue gas heat exchanger 102 for heat exchange using the desalted water device. After passing through the flue gas heat exchanger 102, the heat of the flue gas is absorbed, and the temperature of the desalted water is increased to about 110°C, so that the temperature of the flue gas discharged into the atmosphere is reduced to about 90°C, thereby enhancing the waste heat utilization efficiency of a waste heat recovery evaporation device for high-temperature flue gas from a generator set boiler.

[0027] Further, such as Figure 1As shown, the desalted water device includes a desalted water input pipe 2; a desalted water input pipe 2 is arranged on the top of the water-cooled heat exchanger 16; the desalted water input pipe 2 is arranged from the water-cooled heat exchanger 16; the output end of the desalted water input pipe 2 passes through the middle of the water-cooled heat exchanger 16 and the smoke exhaust heat exchanger 102; a steam exhaust pipe 22 is arranged on the top of the waste heat boiler 19; a first valve 23 is installed in the middle of the steam exhaust pipe 22; when working, the desalted water can be brought into the water-cooled heat exchanger 16 through the desalted water input pipe 2 for heat exchange to heat the circulating water inside its second delivery pipe 15. The desalted water conveying pipe 21 can be used to exchange heat in the exhaust heat exchanger 102 to cool the flue gas in the waste heat boiler 19, and the gas generated by cooling can be discharged from the waste heat boiler 19 through the desalted water input pipe 2, and the discharge rate of the steam discharge pipe 22 can be controlled by the first valve 23; in this step, the desalted water input pipe 2 is set to allow the desalted water to enter the water-cooled heat exchanger 16 for heat exchange to heat the circulating water in its second conveying pipe 15. The desalted water conveying pipe 21 can be used to exchange heat in the exhaust heat exchanger 102 to cool the flue gas in the waste heat boiler 19, and the gas generated by cooling can be discharged from the waste heat boiler 19 through the desalted water input pipe 2, and the discharge rate of the steam discharge pipe 22 can be controlled by the first valve 23, further enhancing the flue gas emission effect of a waste heat recovery evaporation device for high-temperature flue gas of a generator set boiler.

[0028] Further, such as Figures 1 to 4As shown, a cooling water chamber 3 is provided inside the water-cooled heat exchanger 16; a second cooling water inlet pipe 37 is connected to the top of the cooling water chamber 3; a second cooling water outlet pipe 38 is connected to the other side of the top of the cooling water chamber 3; a partition 31 is provided inside the water-cooled heat exchanger 16; the partition 31 is evenly distributed inside the water-cooled heat exchanger 16; a hot water drain valve 32 is installed on the bottom side wall of the water-cooled heat exchanger 16; a cold water drain valve 33 is installed on the bottom of the water-cooled heat exchanger 16; the cold water drain valve 33 is arranged below the hot water drain valve 32; a circulating water outlet pipe 35 is provided on the top side wall of the water-cooled heat exchanger 16; the circulating water outlet pipe 35 is arranged above the hot water drain valve 32; a circulating water inlet pipe 36 is provided on the side wall of the water-cooled heat exchanger 16; the circulating water inlet pipe 36 is arranged above the first delivery pipe 13; when working, the circulating water inlet pipe 36 is provided on the side wall of the water-cooled heat exchanger 16; the circulating water inlet pipe 36 is arranged above the first delivery pipe 13; The second cooling water inlet pipe 37 can input cooling water into the cooling water chamber 3, and use the partition 31 to cool the liquid entering the water-cooled heat exchanger 16. The cooled hot water and cold water can be discharged separately through the hot water drain valve 32 and the cold water drain valve 33, and the used cooling water can be discharged from the water-cooled heat exchanger 16 through the second cooling water outlet pipe 38. In this step, the second cooling water inlet pipe 37 is set up, so that cooling water can be input into the cooling water chamber 3, and the liquid entering the water-cooled heat exchanger 16 can be cooled by using the partition 31. The cooled hot water and cold water can be discharged separately through the hot water drain valve 32 and the cold water drain valve 33, and the used cooling water can be discharged from the water-cooled heat exchanger 16 through the second cooling water outlet pipe 38, thereby further enhancing the cooling and discharge effect of a high-temperature flue gas waste heat recovery evaporation device of a generator set boiler.

[0029] Further, such as Figure 1 As shown, the liquid inside the biogas engine 12 flows toward the water-cooled heat exchanger 16 through the second delivery pipe 15; the liquid cooled inside the water-cooled heat exchanger 16 passes through the middle of the engine air-cooled heat exchanger 14 through the third delivery pipe 17; the liquid inside the third delivery pipe 17 flows toward the inside of the biogas engine 12; when working, the circulating water can be cooled by the flow direction of the second delivery pipe 15 toward the water-cooled heat exchanger 16, and the inside of the biogas engine 12 can be circulated and cooled by the third delivery pipe 17; this step can continuously cool the inside of the biogas engine 12 by the arrangement of the second delivery pipe 15 and the third delivery pipe 17, further enhancing the circulation effect of a high-temperature flue gas waste heat recovery evaporation device for a generator set boiler.

[0030] Further, such as Figure 1As shown, the desalted water delivery pipe 21 passes through the top of the side wall of the smoke exhaust heat exchanger 102; the desalted water delivery pipe 21 passes through the bottom of the smoke exhaust heat exchanger 102; during operation, the desalted water delivery pipe 21 passes through the top of the smoke exhaust heat exchanger 102, so that the flue gas that has completed heat exchange inside the smoke exhaust heat exchanger 102 can be heated to the desalted water, and the desalted water delivery pipe 21 passing through the bottom of the smoke exhaust heat exchanger 102 can be used to cool the desalted water after the flue gas inside the waste heat boiler 19 is cooled by the waste heat; in this step, the desalted water delivery pipe 21 passes through the top of the smoke exhaust heat exchanger 102, so that the desalted water delivery pipe 21 passes through the bottom of the smoke exhaust heat exchanger 102, so that the flue gas that has completed heat exchange inside the smoke exhaust heat exchanger 102 can be heated to the desalted water, and the desalted water delivery pipe 21 passing through the bottom of the smoke exhaust heat exchanger 102 can be used to cool the desalted water after the flue gas inside the waste heat boiler 19 is cooled by the waste heat, further enhancing the waste heat utilization effect of a waste heat recovery evaporation device for high-temperature flue gas waste heat recovery of a generator set boiler.

[0031] Further, such as Figure 2 As shown, the cooling water chamber 3 is arranged above the partition 31; the partition 31 is arranged in the middle of the cooling water chamber 3; when working, the cooling water injected into the water-cooled heat exchanger 16 can be stored through the cooling water chamber 3, and the liquid entering the water-cooled heat exchanger 16 can be separated and cooled by the partition 31; this step can make the coolant more comprehensively spread inside the water-cooled heat exchanger 16 to cool the liquid entering the water-cooled heat exchanger 16 through the arrangement of the cooling water chamber 3 and the partition 31, further enhancing the cooling uniformity effect of a high-temperature flue gas waste heat recovery evaporation device of a generator set boiler.

[0032] Further, such as Figure 4 As shown, the exhaust chimney 105 is arranged above the first cooling water inlet pipe 103; when working, the gas evaporated by cooling the cooling water can be discharged through the exhaust chimney 105; this step can discharge the gas generated by cooling through the setting of the exhaust chimney 105, further enhancing the air pressure stabilizing effect of a high-temperature flue gas waste heat recovery evaporation device of a generator set boiler.

[0033] Working principle: When working, the generator body 1 can drive the biogas inside the biogas engine 12 through the connecting pipe 11, and the desalted water input through the desalted water device can be heated to about 80°C through the water-cooled heat exchanger 16, and the heat of the circulating water entering the water-cooled heat exchanger 16 can be fully absorbed. The gas inside the biogas engine 12 can be passed through the waste heat boiler 19 through the first gas pipe 18 and enter the flue gas heat exchanger 102 for heat exchange using the desalted water device. After passing through the flue gas heat exchanger 102, the heat of the flue gas is absorbed, and the temperature of the desalted water rises to about 110°C, so that the temperature of the flue gas discharged into the atmosphere drops to about 90°C. The desalted water can be brought into the water-cooled heat exchanger 16 through the desalted water input pipe 2 for heat exchange to heat the circulating water inside its second delivery pipe 15. The desalted water can be used for heat exchange in the exhaust heat exchanger 102 through the desalted water delivery pipe 21 to cool the flue gas in the waste heat boiler 19. The gas generated by cooling can be discharged from the waste heat boiler 19 through the desalted water input pipe 2. The discharge rate of the steam discharge pipe 22 can be controlled by the first valve 23. The cooling water can be input into the cooling water chamber 3 through the second cooling water inlet pipe 37. The liquid entering the water-cooled heat exchanger 16 can be cooled by the partition 31. The cooled hot water and cold water can be discharged respectively through the hot water drain valve 32 and the cold water drain valve 33. The used cooling water can be discharged from the water-cooled heat exchanger 16 through the second cooling water outlet pipe 38. The circulating water can be cooled by the flow direction of the second delivery pipe 15 toward the water-cooled heat exchanger 16, and the third delivery pipe 17 can be used to circulate and cool the inside of the biogas engine 12. The desalted water delivery pipe 21 passes through the top of the smoke exhaust heat exchanger 102, and the desalted water can be heated by the flue gas that has completed the heat exchange inside the smoke exhaust heat exchanger 102. The desalted water delivery pipe 21 passing through the bottom of the smoke exhaust heat exchanger 102 can cool the flue gas inside the waste heat boiler 19 with the desalted water after the waste heat. The cooling water injected into the water-cooled heat exchanger 16 can be stored through the cooling water chamber 3, and the partition 31 can be used to separate and cool the liquid entering the water-cooled heat exchanger 16.

[0034] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A generator set boiler high temperature flue gas waste heat recovery evaporation device, comprising a generator body (1); characterized in that: The output end of the generator body (1) is connected to a connecting pipe (11); the generator body (1) and the biogas engine (12) are connected via the connecting pipe (11); a first delivery pipe (13) is provided on the side wall of the biogas engine (12); an engine air-cooled heat exchanger (14) is installed at the output port of the first delivery pipe (13); a second delivery pipe (15) is connected to the other side wall of the biogas engine (12); the output end of the second delivery pipe (15) is connected to a water-cooled heat exchanger (16); a third delivery pipe (17) is connected between the water-cooled heat exchanger (16) and the biogas engine (12); the third delivery pipe (17) passes through the middle of the engine air-cooled heat exchanger (14); The other side wall of the engine (12) is connected to a first air pipe (18); a waste heat boiler (19) is sleeved on the side wall of the first air pipe (18); the output end of the first air pipe (18) is connected to a second air pipe (101); a smoke exhaust heat exchanger (102) is sleeved on the side wall of the second air pipe (101); a first cooling water inlet pipe (103) is connected to the side wall of the smoke exhaust heat exchanger (102); the other side wall of the smoke exhaust heat exchanger (102) is connected to a first cooling water outlet pipe (104); an exhaust pipe (105) is fixedly connected to the top of the smoke exhaust heat exchanger (102); a desalted water device is arranged on the top of the water-cooled heat exchanger (16); and the desalted water device passes through the middle of the smoke exhaust heat exchanger (102).

2. The device for recovering waste heat from high-temperature flue gas of a generator set boiler according to claim 1 is characterized in that: The desalted water device comprises a desalted water input pipe (2); a desalted water input pipe (2) is arranged at the top of the water-cooled heat exchanger (16); an output end of the desalted water input pipe (2) passes through the middle of the water-cooled heat exchanger (16) and the smoke exhaust heat exchanger (102); a steam exhaust pipe (22) is arranged at the top of the waste heat boiler (19); and a first valve (23) is installed in the middle of the steam exhaust pipe (22).

3. The device for recovering waste heat from high-temperature flue gas of a generator set boiler according to claim 2 is characterized in that: The water-cooled heat exchanger (16) is provided with a cooling water chamber (3) inside; the top of the cooling water chamber (3) is connected to a second cooling water inlet pipe (37); the other side of the top of the cooling water chamber (3) is connected to a second cooling water outlet pipe (38); the water-cooled heat exchanger (16) is provided with a partition (31); the partition (31) is evenly distributed inside the water-cooled heat exchanger (16); a hot water drain valve (32) is installed on the bottom side wall of the water-cooled heat exchanger (16); A cold water drain valve (33) is installed at the bottom of the water-cooled heat exchanger (16); the cold water drain valve (33) is arranged below the hot water drain valve (32); a circulating water outlet pipe (35) is arranged on the top side wall of the water-cooled heat exchanger (16); the circulating water outlet pipe (35) is arranged above the hot water drain valve (32); a circulating water inlet pipe (36) is arranged on the side wall of the water-cooled heat exchanger (16); the circulating water inlet pipe (36) is arranged above the first delivery pipe (13).

4. The device for recovering waste heat from high-temperature flue gas of a generator boiler according to claim 3 is characterized in that: The liquid inside the biogas engine (12) flows toward the water-cooled heat exchanger (16) through the second delivery pipe (15); the liquid cooled inside the water-cooled heat exchanger (16) passes through the middle of the engine air-cooled heat exchanger (14) through the third delivery pipe (17); and the liquid inside the third delivery pipe (17) flows toward the inside of the biogas engine (12).

5. The device for recovering waste heat from high-temperature flue gas of a generator set boiler according to claim 4 is characterized in that: The desalted water delivery pipe (21) passes through the top of the side wall of the smoke exhaust heat exchanger (102); the desalted water delivery pipe (21) passes through the bottom of the smoke exhaust heat exchanger (102).

6. The device for recovering waste heat from high-temperature flue gas of a generator boiler according to claim 5 is characterized in that: The cooling water chamber (3) is arranged above the partition plate (31); and a partition plate (31) is arranged in the middle of the cooling water chamber (3).

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