A high-efficiency waste heat resource utilization device for a steam turbine generator unit

Abstract

The utility model discloses a kind of high-efficiency waste heat resource utilization devices for steam turbine generator unit, it is related to steam turbine generator technology field, including boiler and steam accumulator, one end of steam accumulator is fixedly connected with steam turbine, the bottom of boiler is fixedly connected with flue gas duct, one end of steam turbine is fixedly connected with condenser, one end of condenser is fixedly connected with waste gas recovery device, the top of waste gas recovery device is provided with auxiliary generator.The utility model of a kind of high-efficiency waste heat resource utilization devices for steam turbine generator unit, in the process of reciprocating rotation of transmission gear, by rotating shaft, auxiliary generator generates electricity, and electrical energy is stored in the inside of energy storage equipment, waste gas is recycled, improve the waste heat recovery efficiency of steam turbine generator set;Water pipe and heat exchange plate are kept warm, avoid condensate in the process of backflow cooling, utilize the remaining flue gas waste heat, and then reduce the power consumption of subsequent low-pressure heater.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine generator technology, and more specifically, to a high-efficiency waste heat resource utilization device for steam turbine generator sets. Background Technology

[0002] As core equipment in energy systems such as thermal power and combined heat and power (CHP), steam turbine generator sets generate a large amount of waste heat during energy conversion, mainly concentrated in turbine exhaust, boiler flue gas, and circulating water in equipment cooling systems. Statistics show that the overall energy utilization rate of conventional steam turbine generator sets is only 40%-50%, with more than half of the energy being directly emitted as waste heat. This not only causes serious energy waste but also leads to environmental problems such as thermal pollution. With the advancement of "dual carbon" targets and the intensification of energy shortages, the efficient recovery and utilization of waste heat resources has become a key path to improve generator set energy efficiency and reduce carbon emissions.

[0003] Existing technologies for recovering waste heat at medium and low temperatures are not mature, resulting in the direct waste of some waste heat. In particular, the steam generated by the steam turbine generator set is not directly utilized, and during the water circulation process, the return water pipes cannot be insulated, thus failing to maximize the comprehensive benefits of waste heat. Utility Model Content

[0004] The main objective of this invention is to provide a high-efficiency waste heat resource utilization device for steam turbine generator sets, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-efficiency waste heat resource utilization device for a steam turbine generator set includes a boiler. A steam drum is fixedly connected to one end of the top of the boiler. A steam accumulator is fixedly connected to one end of the steam drum. A steam turbine is fixedly connected to one end of the steam accumulator. A main generator is fixedly connected to one end of the steam turbine. An energy storage device is fixedly connected to one end of the main generator. A flue gas duct is fixedly connected to the bottom of the boiler. A condenser is fixedly connected to one end of the steam turbine. A waste gas recovery device is fixedly connected to one end of the condenser. An auxiliary generator is installed on top of the waste gas recovery device. One end of the auxiliary generator is connected to the energy storage device. A condensate pump is fixedly connected to one end of the condenser. A return pipe is fixedly connected to one end of the condensate pump. The return pipe is fixedly installed inside the flue gas duct. A low-pressure heater is fixedly connected to one end of the return pipe. A deaerator is fixedly connected to one end of the low-pressure heater. A feedwater pump is fixedly connected to one end of the deaerator. A high-pressure heater is fixedly connected to one end of the feedwater pump. The high-pressure heater is fixedly connected to the steam drum.

[0006] Preferably, the waste gas recovery device includes a fixed box, a connecting air column is fixedly connected to the upper left side of the fixed box, an air inlet pipe is fixedly connected to the top of the connecting air column, the connecting air column is connected to the condenser through the air inlet pipe, connecting air pipes are fixedly connected to both ends of the bottom of the connecting air column, a fixed air pipe is fixedly connected to the lower left side of the fixed box, the connecting air column is connected to the fixed air pipe through the connecting air pipe, and an exhaust pipe is fixedly connected to the middle of the lower end of the connecting air column.

[0007] Preferably, two fixing rods are fixedly installed on the upper right side of the fixing box, and rotating rods are rotatably installed on the outer surfaces of the two fixing rods. A fixing frame is fixedly connected to the lower right side of the fixing box, and a sliding groove is opened on the top of the fixing frame. A fixing piston is movably sleeved inside the fixing air pipe. A movable rod is fixedly connected to the right end of the fixing piston. The movable rod is movably sleeved on the right end of the fixing air pipe. A movable rack is fixedly connected to the lower side of the right end of the movable rod. The movable rack is slidably installed inside the sliding groove. A transmission gear is rotatably installed inside the fixing frame. A rotating shaft is fixedly sleeved inside the transmission gear. The top of the rotating shaft is connected to the output end of the auxiliary generator. The side of the movable rack meshes with the outer surface of the transmission gear.

[0008] Preferably, a protrusion is fixedly connected to the top of the right end of the movable rod, the protrusion is movably installed between the two rotating rods, a movable sleeve is movably sleeved inside the connecting air column, an air guide groove is opened at the bottom of the movable sleeve, the air guide groove is located at the top of the connecting air pipe and the exhaust pipe, a push rod is fixedly connected to the right end of the movable sleeve, the push rod is movably sleeved inside the connecting air column, and the right end of the push rod is rotatably connected to the top of the two fixed rods.

[0009] Preferably, the return pipe includes a main water pipe, and the main water pipe is internally connected to two branch water pipes. The two branch water pipes are respectively fixedly installed on both sides of the inner wall of the flue pipe. Multiple heat exchange plates are fixedly connected inside the branch water pipes on both sides, and the heat exchange plates on both sides are staggered on both sides of the inner wall of the flue pipe.

[0010] Preferably, the heat exchange plate includes a fixed plate shell, the interior of which is provided with a flow cavity, and a partition plate is fixedly connected inside the flow cavity, dividing it into two parts. The two sides of the fixed plate shell are respectively connected to branch water pipes, and the end of the partition plate farther from the branch water pipe is provided with multiple connecting holes.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up an exhaust gas recovery device, steam enters the interior of the connecting gas column through the intake pipe, and then enters the interior of the fixed gas pipe through the connecting gas pipes at both ends. Through the action of the fixed piston, the movable rod reciprocates inside the fixed gas pipe, and drives the movable rack to reciprocate. During the reciprocating rotation of the transmission gear, the auxiliary generator generates electricity through the rotating shaft, and the electrical energy is stored inside the energy storage device to recover the exhaust gas and improve the waste heat recovery efficiency of the steam turbine engine set. 2. During the process of flue gas being discharged through the flue pipe, the branch water pipe and heat exchange plate are insulated to prevent the condensate from cooling during the recirculation process, thereby utilizing the residual heat of the flue gas and reducing the power consumption of the subsequent low-pressure heater. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a water vapor flow diagram of the present invention; Figure 3 This is a schematic diagram of the waste gas recovery device of this utility model; Figure 4 This is a schematic diagram of the internal structure of the smoke exhaust pipe of this utility model; Figure 5 This is a schematic diagram of the heat exchange plate structure of this utility model.

[0013] The attached figures are labeled as follows: 1. Boiler; 2. Steam drum; 3. Steam accumulator; 4. Steam turbine; 5. Main generator; 6. Energy storage equipment; 7. Flue gas duct; 8. Condenser; 9. Condensate pump; 11. Waste gas recovery device; 12. Auxiliary generator; 111. Fixed box; 112. Fixed gas pipe; 113. Fixed piston; 114. Moving rod; 115. Protrusion; 116. Moving rack; 117. Sliding groove; 18. Transmission gear; 119. Rotating shaft; 120. Fixed rod; 121. Rotating rod; 123. Connecting air column; 124. Air inlet pipe; 125. Connecting air pipe; 126. Exhaust pipe; 127. Moving sleeve; 128. Air guide groove; 129. Push rod; 101. Main water pipe; 102. Branch water pipe; 103. Heat exchange plate; 1031. Fixed plate shell; 1032. Partition plate; 1033. Connecting hole. Detailed Implementation

[0014] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0015] As attached Figure 1 To be continued Figure 5As shown, an embodiment of this utility model provides a high-efficiency waste heat resource utilization device for a steam turbine generator set, including a boiler 1 and a waste gas recovery device 11. A steam drum 2 is fixedly connected to one end of the top of the boiler 1. A steam accumulator 3 is fixedly connected to one end of the steam drum 2. A steam turbine 4 is fixedly connected to one end of the steam accumulator 3. A main generator 5 is fixedly connected to one end of the steam turbine 4. An energy storage device 6 is fixedly connected to one end of the main generator 5. A flue gas duct 7 is fixedly connected to the bottom of the boiler 1. A condenser 8 is fixedly connected to one end of the steam turbine 4. One end of the condenser 8 is connected to the waste gas... The waste gas recovery device 11 is fixedly connected. An auxiliary generator 12 is installed on the top of the waste gas recovery device 11. One end of the auxiliary generator 12 is connected to the energy storage device 6. One end of the condenser 8 is fixedly connected to the condensate pump 9. One end of the condensate pump 9 is fixedly connected to the return pipe. The return pipe is fixedly installed inside the flue gas duct 7. One end of the return pipe is fixedly connected to the low-pressure heater. One end of the low-pressure heater is fixedly connected to the deaerator. One end of the deaerator is fixedly connected to the feed water pump. One end of the feed water pump is fixedly connected to the high-pressure heater. The high-pressure heater is fixedly connected to the steam drum 2.

[0016] like Figure 3 As shown, the waste gas recovery device 11 includes a fixed box 111. A connecting air column 123 is fixedly connected to the upper left side of the fixed box 111. An air inlet pipe 124 is fixedly connected to the top of the connecting air column 123. The connecting air column 123 is connected to the condenser 8 through the air inlet pipe 124. Connecting air pipes 125 are fixedly connected to both ends of the bottom of the connecting air column 123. A fixed air pipe 112 is fixedly connected to the lower left side of the fixed box 111. The connecting air column 123 is connected to the fixed air pipe 112 through the connecting air pipe 125. An exhaust pipe 126 is fixedly connected to the middle of the lower end of the connecting air column 123.

[0017] Two fixed rods 120 are fixedly installed on the upper right side of the fixed box 111. Rotating rods 121 are rotatably installed on the outer surface of each of the two fixed rods 120. A fixed frame is fixedly connected to the lower right side of the fixed box 111. A sliding groove 117 is opened on the top of the fixed frame. A fixed piston 113 is movably sleeved inside the fixed air pipe 112. A movable rod 114 is fixedly connected to the right end of the fixed piston 113. The movable rod 114 is movably sleeved on the right end of the fixed air pipe 112. A movable rack 116 is fixedly connected to the lower side of the right end of the movable rod 114. The movable rack 116 is slidably installed inside the sliding groove 117. A transmission gear 118 is rotatably installed inside the fixed frame. A rotating shaft 119 is fixedly sleeved inside the transmission gear 118. The top of the rotating shaft 119 is connected to the output end of the auxiliary generator 12. The side of the movable rack 116 meshes with the outer surface of the transmission gear 118.

[0018] The top of the right end of the movable rod 114 is fixedly connected to a protrusion 115, which is movably installed between two rotating rods 121. A movable sleeve 127 is movably sleeved inside the connecting air column 123. An air guide groove 128 is provided at the bottom of the movable sleeve 127. The air guide groove 128 is located at the top of the connecting air pipe 125 and the exhaust pipe 126. A push rod 129 is fixedly connected to the right end of the movable sleeve 127. The push rod 129 is movably sleeved inside the connecting air column 123. The right end of the push rod 129 is rotatably connected to the top of the two fixed rods 120.

[0019] Specifically, steam enters the interior of the connecting gas column 123 through the inlet pipe 124, and then enters the interior of the fixed gas pipe 112 through the connecting gas pipes 125 at both ends. The fixed piston 113 causes the movable rod 114 to move inside the fixed gas pipe 112. The movable rod 114 drives the movable rack 116 to move. Through the meshing of the movable rack 116 and the transmission gear 118, the rotating shaft 119 rotates, which drives the auxiliary generator 12 to work, generate electricity, and store the electrical energy inside the energy storage device 6. By utilizing the waste gas, the electrical energy is converted and the waste heat recovery efficiency is improved.

[0020] For example, 4- Figure 5 As shown, the return pipe includes a main water pipe 101, and two branch water pipes 102 are fixedly connected inside the main water pipe 101. The two branch water pipes 102 are respectively fixedly installed on both sides of the inner wall of the flue gas duct 7. Multiple heat exchange plates 103 are fixedly connected inside the branch water pipes 102 on both sides. The heat exchange plates 103 on both sides are staggered on both sides of the inner wall of the flue gas duct 7.

[0021] The heat exchange plate 103 includes a fixed plate shell 1031, the fixed plate shell 1031 has a flow cavity inside, and a partition plate 1032 is fixedly connected inside the flow cavity, dividing it into two parts. The two sides of the fixed plate shell 1031 are respectively connected to the branch water pipe 102. The partition plate 1032 has multiple connecting holes 1033 at the end away from the branch water pipe 102.

[0022] When the condensate flows back through the main water pipe 101, the flue gas is discharged through the exhaust pipe 7, which insulates the branch water pipe 102 and the heat exchange plate 103 to prevent the condensate from cooling during the return process. At the same time, the multiple heat exchange plates 103 are staggered on both sides of the exhaust pipe 7 to increase the flow time of the flue gas. The fixed plate shell 1031 increases the contact area between the cold water and the flue gas during the return process. The discharged flue gas insulates the returned condensate, preventing the condensate from cooling due to environmental influences during the return process, which would increase the power consumption of the subsequent low-pressure heater.

[0023] The working process of this utility model is as follows: In operation, boiler 1 works and discharges the generated flue gas through exhaust pipe 7. Subsequently, steam drum 2 stores water vapor inside steam accumulator 3 and then transports it into steam turbine 4. The steam powers steam turbine 4, which in turn drives main generator 5. The generated electricity is stored inside energy storage device 6. Then, steam enters condenser 8 and comes into contact with the cooling medium, usually water, during the internal cooling process. The steam and water dissipate heat and condense into water in condenser 8, which is then pumped by condensate pump 9 to exhaust pipe 7 for recirculation. The condensate is deoxygenated by deaerator, then pumped by feedwater pump into high-pressure heater for reheating, and finally transported back to steam drum 2 to achieve water circulation. During this process, the exhaust gas inside the condenser 8 enters the interior of the connecting gas column 123 through the inlet pipe 124. When the exhaust gas enters the left end of the fixed gas pipe 112 through the connecting gas pipe 125 at the left end of the connecting gas column 123, the gas inside the fixed gas pipe 112 pushes the fixed piston 113 to move to the right, causing the movable rod 114 to push the movable rack 116 to move to the right inside the sliding groove 117. When the movable rod 114 moves to the far right, the protrusion 115 pushes the lower end of the right rotating rod 121, causing the rotating rod 121 to rotate on the outer surface of the fixed rod 120, and pushing the push rod 129 to move to the left inside the connecting gas column 123, causing the movable sleeve 127 to move to the left inside the connecting gas column 123. The movable sleeve 127 blocks the top of the connecting gas pipe 125 on the left side of the connecting gas column 123. At this time, the steam inside the inlet pipe 124 moves to the right end of the connecting gas column 123. Inside the air pipe 125, steam enters the right end of the fixed air pipe 112 and pushes the fixed piston 113 to move to the left in the fixed air pipe 112. At this time, the steam inside the left end of the fixed air pipe 112 passes through the connecting air pipe 125 at the left end, through the air guide groove 128, and is discharged from the exhaust pipe 126. During the movement of the movable rod 114 to the left, the protrusion 115 pushes the rotating rod 121 at the left end, causing the rotating rod 121 at the left end to rotate on the outer surface of the fixed rod 120. This causes the rotating rod 121 to move the push rod 129 to the right, and the movable sleeve 127 moves to the right end of the connecting air column 123. In this way, the movable rod 114 reciprocates inside the fixed air pipe 112 and pushes the movable rack 116 to reciprocate. During the reciprocating rotation of the transmission gear 118, the auxiliary generator 12 generates electricity through the rotating shaft 119 and stores the electrical energy inside the energy storage device 6. When the condensate flows back through the main water pipe 101, the flue gas is discharged through the exhaust pipe 7, which insulates the branch water pipe 102 and the heat exchange plate 103 to prevent the condensate from cooling during the return process. At the same time, the multiple heat exchange plates 103 are staggered on both sides of the exhaust pipe 7 to increase the flow time of the flue gas. The fixed plate shell 1031 increases the contact area between the cold water and the flue gas during the return process. The discharged flue gas insulates the returned condensate, preventing the condensate from cooling due to environmental influences during the return process, which would increase the power consumption of the subsequent low-pressure heater.

[0024] Finally, it should be noted that: the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency waste heat resource utilization device for steam turbine generator sets, comprising a boiler (1), characterized in that: A steam drum (2) is fixedly connected to one end of the top of the boiler (1). A steam accumulator (3) is fixedly connected to one end of the steam drum (2). A steam turbine (4) is fixedly connected to one end of the steam accumulator (3). A main generator (5) is fixedly connected to one end of the steam turbine (4). An energy storage device (6) is fixedly connected to one end of the main generator (5). A flue gas duct (7) is fixedly connected to the bottom of the boiler (1). A condenser (8) is fixedly connected to one end of the steam turbine (4). A waste gas recovery device (11) is fixedly connected to one end of the condenser (8). A secondary generator (12) is installed on the top of (11). One end of the secondary generator (12) is connected to the energy storage device (6). One end of the condenser (8) is fixedly connected to a condensate pump (9). One end of the condensate pump (9) is fixedly connected to a return pipe. The return pipe is fixedly installed inside the flue gas duct (7). One end of the return pipe is fixedly connected to a low-pressure heater. One end of the low-pressure heater is fixedly connected to a deaerator. One end of the deaerator is fixedly connected to a feed water pump. One end of the feed water pump is fixedly connected to a high-pressure heater. The high-pressure heater is fixedly connected to the steam drum (2).

2. The high-efficiency waste heat resource utilization device for steam turbine generator sets according to claim 1, characterized in that: The waste gas recovery device (11) includes a fixed box (111). A connecting air column (123) is fixedly connected to the upper left side of the fixed box (111). An air inlet pipe (124) is fixedly connected to the top of the connecting air column (123). The connecting air column (123) is connected to the condenser (8) through the air inlet pipe (124). Both ends of the bottom of the connecting air column (123) are fixedly connected to connecting air pipes (125). A fixed air pipe (112) is fixedly connected to the lower left side of the fixed box (111). The connecting air column (123) is connected to the fixed air pipe (112) through the connecting air pipe (125). An exhaust pipe (126) is fixedly connected to the middle of the lower end of the connecting air column (123).

3. The high-efficiency waste heat resource utilization device for steam turbine generator sets according to claim 2, characterized in that: Two fixing rods (120) are fixedly installed on the upper right side of the fixed box (111). Rotating rods (121) are rotatably installed on the outer surface of both fixing rods (120). A fixing frame is fixedly connected to the lower right side of the fixed box (111). A sliding groove (117) is provided on the top of the fixing frame. A fixing piston (113) is movably sleeved inside the fixing air pipe (112). A movable rod (114) is fixedly connected to the right end of the fixing piston (113). The movable rod (114) is movably sleeved on the fixing air pipe. At the right end of the tube (112), a movable rack (116) is fixedly connected to the lower side of the right end of the movable rod (114). The movable rack (116) is slidably installed inside the sliding groove (117). A transmission gear (118) is rotatably installed inside the fixed frame. A rotating shaft (119) is fixedly sleeved inside the transmission gear (118). The top of the rotating shaft (119) is connected to the output end of the auxiliary generator (12). The side of the movable rack (116) meshes with the outer surface of the transmission gear (118).

4. The high-efficiency waste heat resource utilization device for steam turbine generator sets according to claim 3, characterized in that: A protrusion (115) is fixedly connected to the top of the right end of the movable rod (114). The protrusion (115) is movably installed between the two rotating rods (121). A movable sleeve (127) is movably sleeved inside the connecting air column (123). An air guide groove (128) is opened at the bottom of the movable sleeve (127). The air guide groove (128) is located at the top of the connecting air pipe (125) and the exhaust pipe (126). A push rod (129) is fixedly connected to the right end of the movable sleeve (127). The push rod (129) is movably sleeved inside the connecting air column (123). The right end of the push rod (129) is rotatably connected to the top of the two fixed rods (120).

5. The high-efficiency waste heat resource utilization device for steam turbine generator sets according to claim 1, characterized in that: The return pipe includes a main water pipe (101), and the main water pipe (101) is internally connected to two branch water pipes (102). The two branch water pipes (102) are respectively fixedly installed on both sides of the inner wall of the flue pipe (7). Multiple heat exchange plates (103) are fixedly connected inside the branch water pipes (102) on both sides. The heat exchange plates (103) on both sides are staggered on both sides of the inner wall of the flue pipe (7).

6. A high-efficiency waste heat resource utilization device for steam turbine generator sets according to claim 5, characterized in that: The heat exchange plate (103) includes a fixed plate shell (1031), the fixed plate shell (1031) has a flow cavity inside, and a partition plate (1032) is fixedly connected inside the flow cavity, and the partition plate (1032) divides it into two. The two sides of the fixed plate shell (1031) are respectively connected to the branch water pipe (102). The partition plate (1032) has multiple connecting holes (1033) at the end away from the branch water pipe (102).

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