Steam turbine waste heat recycling device

Abstract

The invention provides a steam turbine waste heat recycling device, and relates to the technical field of steam turbine waste heat recovery, the steam turbine waste heat recycling device comprises a bottom plate, a steam turbine body, a first recovery mechanism, a second recovery mechanism, a power generation recovery mechanism and a controller, the output end of the left side of the steam turbine body fixedly communicates with a first recycling mechanism, a power generation recycling mechanism is fixedly arranged on the right side of the top of the first recycling mechanism, the output end of the first recycling mechanism fixedly communicates with a second recycling mechanism, and the first recycling mechanism, the second recycling mechanism and the power generation recycling mechanism are electrically connected with a controller. By means of the multi-stage recovery mechanism, efficient recovery of waste heat of the steam turbine is achieved, and the energy utilization rate is increased; and through the arrangement of the power generation recovery mechanism, electric energy can be generated while heat energy is recovered, the economic benefit of the device is increased, the energy storage form is increased, and storage is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine waste heat recovery, and in particular to a steam turbine waste heat recovery and utilization device. Background Art

[0002] The research and development background of steam turbine waste heat recovery and utilization device mainly stems from the demand for industrial energy conservation. In the industrial process, steam turbines generate a large amount of waste heat. If this part of heat energy can be recycled and utilized, it will significantly reduce energy consumption and improve energy utilization efficiency. With the increasing attention paid by the country to energy conservation, emission reduction and environmental protection, waste heat recovery technology has become an important research field. Therefore, the research and development of steam turbine waste heat recovery and utilization device aims to achieve efficient recovery and utilization of waste heat through technological innovation.

[0003] Disadvantages of existing technical solutions

[0004] Low heat recovery efficiency:

[0005] Some existing steam turbine waste heat recovery devices have insufficient heat recovery efficiency, and only use a single form of heat recovery and utilization, which is insufficient. Inefficient heat recovery not only wastes precious energy resources, but also increases the operating cost of the device.

[0006] Difficulty in storing thermal energy:

[0007] The recovered heat is often difficult to store, which limits the widespread application of waste heat recovery technology. Existing heat storage technologies have problems such as high cost and low efficiency, which limits the effective use of heat energy. Summary of the invention

[0008] The present invention provides a steam turbine waste heat recovery and utilization device to solve at least one of the technical problems raised by the above background technology.

[0009] In order to solve the above technical problems, the present invention provides a steam turbine waste heat recovery and utilization device, comprising: a base plate, a steam turbine body, a first recovery mechanism, a second recovery mechanism, a power generation recovery mechanism and a controller, the steam turbine body is fixedly installed on the top right side of the base plate, the left output end of the steam turbine body is fixedly connected to the first recovery mechanism, a power generation recovery mechanism is fixedly provided on the top right side of the first recovery mechanism, the output end of the first recovery mechanism is fixedly connected to the second recovery mechanism, and the first recovery mechanism, the second recovery mechanism and the power generation recovery mechanism are all electrically connected to the controller respectively.

[0010] Preferably, the first recovery mechanism comprises: a bracket 1, a bracket 1 is fixedly installed on the bottom plate located on the left side of the turbine body, a vertical tank body 1 is fixedly installed on the top of the bracket 1, a conical tube 1 is fixedly connected to the inlet of the bottom end of the tank body 1, the conical tube 1 is fixedly connected to the output port of the turbine body through the first steam supply pipe, a conical tube 2 is fixedly connected to the top of the tank body 1, a vertical heat conversion tank is fixedly installed inside the tank body 1, and a plurality of corrugated plates are fixedly distributed inside and outside the side walls of the heat conversion tank.

[0011] Preferably, a rotary spray evaporation mechanism is fixedly provided in the heat conversion tank;

[0012] The rotary spray evaporation mechanism comprises: a vertical pipe 1, the top of the heat conversion tank is fixedly connected to the vertical pipe 1, the bottom end of the inner wall of the vertical pipe 1 is fixedly installed with a horizontal bar 1 along the left and right directions, the center of the horizontal bar 1 is fixedly installed with a vertical sleeve 1, the sleeve 1 is rotatably connected to a vertical water supply pipe 1, the top of the water supply pipe 1 is rotatably hinged to connect to a water supply pipe 2, the water supply pipe 2 transversely penetrates the vertical pipe 1 and the left side wall of the tank body 1, an electromagnetic valve 1 is fixedly installed on the water supply pipe 2, the bottom end of the water supply pipe 1 is fixedly connected to a horizontal spray pipe 1, and the left and right ends of the spray pipe 1 are symmetrically fixedly connected to a pair of vertical spray pipes 2.

[0013] Preferably, the bottom end of the spray pipe 1 is fixedly connected to a plurality of nozzles 1 at equidistant intervals on the left and right sides, and the left and right side walls of the spray pipe 2 are fixedly connected to a plurality of nozzles 2 at equidistant intervals up and down; a vertical water inlet pipe 1 is fixedly provided on the left side of the bottom of the heat conversion tank, the top of the water inlet pipe 1 is fixedly connected to the top water inlet of the first circulation pipe, the outer wall of the first circulation pipe is fixedly connected to a plurality of heat conducting plates, the bottom water outlet of the first circulation pipe is fixedly connected to a vertical water outlet pipe 1, and the right end of the water outlet pipe 1 is fixedly connected to the heating network.

[0014] Preferably, a water tank is fixedly installed on the top left side of the base plate one, the top of the water tank is fixedly connected to a water supply pump, the right end water outlet of the water supply pump is fixedly connected to a vertical water supply main pipe, the top of the water supply main pipe is fixedly connected to a water supply pipe 2, the middle of the water supply main pipe is fixedly connected to a horizontal pipe 1, an electromagnetic valve 2 is fixedly installed on the horizontal pipe 1, the horizontal pipe 1 penetrates the left side wall of the tank body 1 from left to right and is connected to a water inlet pipe 1, and a controller is fixedly installed on the front outer wall of the water tank.

[0015] Preferably, the power generation recovery mechanism includes: a steam supply pipe 2, the vertical pipe 1 is fixedly connected to the steam supply pipe 2 in the left and right directions, the steam supply pipe 2 transversely penetrates the right side wall of the tank body 1, the right end of the steam supply pipe 2 is fixedly connected to a plurality of groups of transverse pressurized pipes, the right end of each pressurized pipe is fixedly connected to a power box, a volute fan is rotatably connected inside the power box, the right end of the axis of the volute fan is fixedly connected to the input shaft end of the generator, and the power box is fixedly connected to a pair of transverse steam outlet pipes symmetrically up and down.

[0016] Preferably, the second recovery mechanism includes: a steam supply pipe three, the conical pipe two is fixedly connected to the steam supply pipe three, the right end of the steam outlet pipe is fixedly connected to the steam supply pipe three, the other end of the steam supply pipe three is fixedly connected to the condensing box, a plurality of groups of second circulation pipes are arranged at intervals on the left and right sides of the condensing box, a plurality of heat conducting plates are also arranged on the outer wall of the second circulation pipe, the top of the second circulation pipe is fixedly connected to the heating network through the water outlet pipe two, the bottom of the second circulation pipe is fixedly connected to the bottom of the water supply main pipe through the water inlet pipe two, a circulation branch pipe is fixedly installed on the outer wall of the turbine body, and the bottom water inlet and the top water outlet of the circulation branch pipe are respectively connected to the water inlet pipe two.

[0017] Preferably, the recovery and drainage mechanism includes: a recovery water tank, the bottom of the left side of the condensate tank is fixedly connected to the recovery water tank through a drain pipe 1, the recovery water tank is fixedly connected to the bottom of the tank body 1 and the heat conversion tank through a drain pipe 2 and a drain pipe 3 respectively, the bottom of the recovery water tank is fixedly connected to the water storage tank through a water outlet pipe 4, and a solenoid valve 3 is fixedly installed on the water outlet pipe 4.

[0018] A heat exchange detection and control module is also provided, which includes:

[0019] Temperature sensor 1, used to detect the temperature value of circulating water in water inlet pipe 1 connected to the bottom of the heat conversion tank;

[0020] Temperature sensor 2, used to detect the temperature of circulating water in outlet pipe 1 connected to the bottom of the heat conversion tank;

[0021] Temperature sensor three, used to detect the steam temperature value at the bottom inlet of the tank body;

[0022] Temperature sensor 4, used to detect the steam temperature value at the top outlet of tank body 1;

[0023] Air pressure sensor 1, used to detect the steam entering pressure value in the conical tube 1 at the bottom of the tank body 1;

[0024] The air pressure sensor 2 is used to detect the steam output pressure value in the conical tube 2 at the top of the tank body 1;

[0025] Alarm, used to alarm in case of abnormal situation;

[0026] The first calculation unit calculates the heat required for the circulating water of the first recovery mechanism to reach a preset temperature when it is output from the water outlet pipe 1 within the detection time period based on the data of the temperature sensor 1, the temperature sensor 2, the temperature sensor 3, the air pressure sensor 1, and the air pressure sensor 2;

[0027] A second calculation unit, based on the result of the first calculation unit, calculates the heat exchange efficiency deviation evaluation value of the first recovery mechanism within the detection time period;

[0028] A control unit is used to collect and process the data of each sensor, thereby adjusting the steam pressure value of the steam turbine input into the tank body 1 and adjusting the frequency of the water supply pump. The control unit is electrically connected to the temperature sensor 1, the temperature sensor 2, the temperature sensor 3, the temperature sensor 4, the air pressure sensor 1, the air pressure sensor 2 and the alarm respectively;

[0029] The comparison and judgment unit is used to compare and judge whether the heat exchange efficiency deviation evaluation value can meet the requirement of heating circulating water to reach a preset temperature.

[0030] Preferably, the first calculation unit calculates based on the following formula 1:

[0031]

[0032] Where: Q is the heat required for the first recovery mechanism to reach the preset temperature when the circulating water is output from the outlet pipe during the t-t0 detection period, C p1 is the specific heat capacity of the circulating water in the first circulating pipe, m1 is the mass of the circulating water flowing through the first circulating pipe during the t-t0 detection period, T1 is the average temperature value of the circulating water in the water inlet pipe 1 detected by the temperature sensor 1 during the t-t0 detection period, T y is the preset temperature value of the circulating water, T3 is the steam temperature value at the bottom inlet of the tank body detected by the temperature sensor 3, C p2 is the specific heat capacity of the steam in the tank, P O is the steam entry pressure value in the conical tube detected by the pressure sensor, P i is the steam output pressure value in the conical tube 2 detected by the air pressure sensor 2, k is the adiabatic index, k is 265, t is the detection end time, t o To detect the initial time, T t is the instantaneous temperature value of the circulating water in the outlet pipe 1 detected by the temperature sensor 2 at time t, T0 is the instantaneous temperature value of the circulating water in the outlet pipe 1 detected by the temperature sensor 2 at time t0, T max is the maximum operating temperature of the steam at the top outlet of the tank body 1 detected by the temperature sensor 4, T min The minimum operating temperature of the steam at the top outlet of the tank body 1 detected by the temperature sensor 4; ln is a logarithmic function, and e is a natural constant with a value of 2.72;

[0033] The second calculation unit calculates based on the following formula 2:

[0034]

[0035] Wherein: ΔA is the heat exchange efficiency deviation evaluation value of the first recovery mechanism in the t-t0 detection time period, T2 is the average temperature of the circulating water in the outlet pipe 1 detected by the temperature sensor 2 in the t-t0 detection time period, T4 is the average temperature of the steam at the top outlet of the tank body 1 detected by the temperature sensor 4, π is the value of pi., R1 is the equivalent radius of the inlet pipe 1, L1 is the length of the inlet pipe 1, R2 is the equivalent radius of the first circulation pipe, L2 is the length of the first circulation pipe, R3 is the equivalent radius of the outlet pipe 1, L3 is the length of the outlet pipe 1, η is the ratio of the inner wall of the inlet pipe 1, the first circulation pipe and the outlet pipe 1 to the heat conducting plate, and π is the value of pi, which is 3.14;

[0036] The comparison and judgment unit performs comparison and judgment. When ΔA<0, the control unit increases the steam pressure of the turbine input tank body 1 and reduces the frequency of the water supply pump. When ΔA>0.5, the control unit increases the steam pressure of the turbine input tank body 1 and reduces the frequency of the water supply pump. When 0≤ΔA≤0.5, the heat exchange efficiency deviation evaluation value of the first recovery mechanism is within a reasonable range and no adjustment is made. When ΔA is still not within a reasonable range after adjustment, the control unit controls the alarm to sound an alarm.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows: the waste heat steam generated by the steam turbine body through the steam turbine waste heat recovery and utilization device provided by the present invention first enters the first recovery mechanism for preliminary heat energy conversion, then uses part of the steam to drive the generator to generate electricity through the power generation recovery mechanism, and finally the remaining steam enters the second recovery mechanism for further heat energy recovery. During the whole process, the controller is responsible for monitoring and adjusting the operating status of each mechanism to ensure the high efficiency and stability of heat energy recovery.

[0038] Beneficial effects:

[0039] Efficient heat recovery: Through the multi-stage recovery mechanism, efficient recovery of steam turbine waste heat is achieved, improving energy utilization.

[0040] Electricity generation: The setting of the power generation recovery mechanism enables the generation of electricity while recovering heat energy, which increases the economic benefits of the device, increases the energy storage form, and facilitates storage.

[0041] Intelligent control: The introduction of the controller realizes real-time monitoring and adjustment of the device's operating status, improving the device's automation level. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a front cross-sectional schematic diagram of a steam turbine waste heat recovery and utilization device of the present invention;

[0044] Figure 2 is a front cross-sectional schematic diagram of a first recovery mechanism of the present invention;

[0045] Figure 3 It is a front sectional schematic diagram of the power generation recovery mechanism of the present invention.

[0046] Reference numerals:

[0047] 1. Bottom plate; 2. Steam turbine body; 3. Controller; 31. Bracket 1; 32. Tank 1; 33. Conical tube 1; 34. First steam supply pipe; 35. Conical tube 2; 36. Heat conversion tank; 37. Corrugated plate; 38. Vertical tube 1; 39. Crossbar 1; 310. Casing 1; 311. Water supply pipe 1; 312. Water supply pipe 2; 313. Solenoid valve 1; 314. Spray pipe 1; 315. Spray pipe 2; 316. Nozzle 1; 317. Nozzle 2; 4. First recovery mechanism; 41. Water inlet pipe 1; 42. First circulation pipe; 43. Heat conducting sheet; 44. Water outlet pipe 1; 5. Heating network ; 6. Power generation recovery mechanism; 61. Steam supply pipe 2; 62. Pressure pipe; 63. Power box; 64. Volute fan; 65. Generator; 66. Steam outlet pipe; 7. Second recovery mechanism; 71. Steam supply pipe 3; 72. Condensate box; 73. Second circulation pipe; 74. Water outlet pipe 2; 75. Water inlet pipe 2; 76. Circulation branch pipe; 8. Recovery and drainage mechanism; 81. Drain pipe 1; 82. Recovery water tank; 83. Drain pipe 2; 84. Drain pipe 3; 85. Water outlet pipe 4; 86. Solenoid valve 3; 9. Water storage tank; 90. Water supply pump; 91. Water supply main pipe; 92. Horizontal pipe 1; 93. Solenoid valve 2. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0050] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] The present invention provides the following embodiments

[0052] Example 1

[0053] The embodiment of the present invention provides a steam turbine waste heat recovery and utilization device, such as Figure 1 As shown, it includes: a base plate 1, a turbine body 2, a first recovery mechanism 4, a second recovery mechanism 7, a power generation recovery mechanism 6 and a controller 3. The turbine body 2 is fixedly installed on the top right side of the base plate 1, and the left output end of the turbine body 2 is fixedly connected to the first recovery mechanism 4. The power generation recovery mechanism 6 is fixedly arranged on the right side of the top of the first recovery mechanism 4. The output end of the first recovery mechanism 4 is fixedly connected to the second recovery mechanism 7. The first recovery mechanism 4, the second recovery mechanism 7 and the power generation recovery mechanism 6 are electrically connected to the controller 3 respectively.

[0054] The working principle and beneficial effects of the above technical solution are as follows: Working principle:

[0055] The steam turbine waste heat recovery and utilization device provided in this embodiment uses the waste heat steam generated by the steam turbine body 2 to first enter the first recovery mechanism 4 for preliminary heat energy conversion, and then uses part of the steam to drive the generator 65 to generate electricity through the power generation recovery mechanism 6, and finally the remaining steam enters the second recovery mechanism 7 for further heat energy recovery. During the whole process, the controller 3 is responsible for monitoring and adjusting the operating status of each mechanism to ensure the high efficiency and stability of heat energy recovery.

[0056] Beneficial effects:

[0057] Efficient heat recovery: Through the multi-stage recovery mechanism, efficient recovery of steam turbine waste heat is achieved, improving energy utilization.

[0058] Electricity generation: The setting of the power generation recovery mechanism 6 enables the generation of electricity while recovering heat energy, thereby increasing the economic benefits of the device.

[0059] Intelligent control: The introduction of controller 3 realizes real-time monitoring and adjustment of the device's operating status, improving the device's automation level.

[0060] Example 2

[0061] On the basis of Example 1, Figure 1 , Figure 2 As shown, the first recovery mechanism 4 includes: a bracket 31, the bracket 31 is fixedly installed on the bottom plate 1 on the left side of the turbine body 2, a vertical tank body 32 is fixedly installed on the top of the bracket 31, a conical pipe 33 is fixedly connected to the inlet of the bottom end of the tank body 32, the conical pipe 33 is fixedly connected to the output port of the turbine body 2 through the first steam supply pipe 34, the top of the tank body 32 is fixedly connected to the conical pipe 2 35, a vertical heat conversion tank 36 is fixedly installed inside the tank body 32, and a plurality of corrugated plates 37 are fixedly distributed inside and outside the side walls of the heat conversion tank 36.

[0062] The heat conversion tank 36 is fixedly provided with a rotary spray evaporation mechanism;

[0063] The rotary spray evaporation mechanism includes: a vertical pipe 38, the top of the heat conversion tank 36 is fixedly connected to the vertical pipe 38, the bottom end of the inner wall of the vertical pipe 38 is fixedly installed with a horizontal bar 39 along the left and right directions, the center of the horizontal bar 39 is fixedly installed with a vertical sleeve 310, the sleeve 310 is rotatably connected to a vertical water supply pipe 311, the top of the water supply pipe 311 is rotatably hinged to a water supply pipe 2 312, the water supply pipe 2 312 transversely penetrates the vertical pipe 38 and the left side wall of the tank body 32, an electromagnetic valve 313 is fixedly installed on the water supply pipe 2 312, the bottom end of the water supply pipe 311 is fixedly connected to a horizontal spray pipe 314, and the left and right ends of the spray pipe 314 are symmetrically fixedly connected to a pair of vertical spray pipes 2 315.

[0064] The bottom end of the spray pipe 314 is fixedly connected to a plurality of nozzles 316 at equal intervals on the left and right sides, and the left and right side walls of the spray pipe 2 315 are fixedly connected to a plurality of nozzles 317 at equal intervals on the top and bottom; a vertical water inlet pipe 41 is fixedly provided on the left side of the bottom of the heat conversion tank 36, and the top of the water inlet pipe 41 is fixedly connected to the top water inlet of the first circulation pipe 42, and the outer wall of the first circulation pipe 42 is fixedly connected to a plurality of heat conducting plates 43, and the bottom water outlet of the first circulation pipe 42 is fixedly connected to a vertical water outlet pipe 44, and the right end of the water outlet pipe 44 is fixedly connected to the heating network 5.

[0065] A water tank 9 is fixedly installed on the top of the left side of the bottom plate 1, and the top of the water tank 9 is fixedly connected to a water supply pump 90. The right end water delivery port of the water supply pump 90 is fixedly connected to a vertical water supply pipe 91. The top of the water supply pipe 91 is fixedly connected to a water supply pipe 2 312. The middle of the water supply pipe 91 is fixedly connected to a horizontal pipe 1 92, and a solenoid valve 2 93 is fixedly installed on the horizontal pipe 1 92. The horizontal pipe 1 92 passes through the left side wall of the tank body 1 32 from left to right and is connected to the water inlet pipe 1 41. The controller 3 is fixedly installed on the front outer wall of the water tank 9.

[0066] The working principle and beneficial effects of the above technical solution are:

[0067] How it works

[0068] Step 1: Steam introduction: The waste heat steam output from the left side of the turbine body 2 is fixedly connected with the conical pipe 33 through the first steam supply pipe 34 and smoothly enters the tank body 32.

[0069] Step 2: Heat exchange process:

[0070] The steam in the tank body 32 exchanges heat with a plurality of wave plates 37 fixedly distributed inside and outside the side wall of the heat conversion tank 36. The design of the wave plates 37 increases the heat exchange area and improves the heat exchange efficiency.

[0071] At the same time, the rotary spray evaporation mechanism starts to work. The water in the water supply pipe 1 311 is evenly sprayed on the wave plate 37, the first circulation pipe 42 and the heat conducting sheet 43 through the nozzles 1 316 and 2 317 on the spray pipe 1 314 and the spray pipe 2 315, forming a thin film evaporation. This spraying method further increases the heat exchange area, making the heat energy recovery more sufficient.

[0072] The rotary spray evaporation mechanism in the heat conversion tank 36 rotates continuously, so that the cooling water can evenly exchange heat with the steam, thereby improving the recovery efficiency of heat energy.

[0073] Heat recovery and utilization:

[0074] The steam temperature after heat exchange is reduced and is discharged from the tank 1 32 through the conical pipe 2 35 to enter the subsequent recovery or treatment process.

[0075] At the same time, the cooling water in the heat conversion tank 36 is heated in the heat exchange process to form hot water. The hot water flows out through the first circulation pipe 42, and the heat conducting sheet 43 on the outer wall further enhances the heat exchange effect; the solenoid valve 2 93 controls the transmission switch and the transmission amount of the circulating water in the horizontal pipe 1 92 and the water inlet pipe 1 41.

[0076] The hot water eventually flows into the heating network 5 through the water outlet pipe 44, thus realizing the recovery and utilization of heat energy.

[0077] Circulating water supply and intelligent control:

[0078] The cooling water in the water storage tank 9 is continuously supplied to the rotary spray evaporation mechanism through the water supply pump 90 and the water supply pipe 91, ensuring the continuation of the heat exchange process.

[0079] When the water temperature in the first circulation pipe 42 reaches a certain level, part of the hot water can flow back to the water inlet pipe 1 41 through the horizontal pipe 1 92 and the solenoid valve 2 93 to achieve circulating water supply.

[0080] The controller 3 monitors and adjusts the operating status of the entire device in real time, ensuring the high efficiency and stability of heat recovery.

[0081] In summary, the device of Example 2 realizes efficient recovery and utilization of waste heat from the steam turbine through a carefully designed heat exchange mechanism and a rotary spray evaporation mechanism. At the same time, the introduction of a circulating water supply system and an intelligent control system further improves the operating efficiency and stability of the device.

[0082] Example 3

[0083] On the basis of Example 1, Figure 1-Figure 3 As shown, the power generation recovery mechanism 6 includes: a steam supply pipe 61, the vertical pipe 38 is fixedly connected to the steam supply pipe 61 in the left and right directions, the steam supply pipe 61 transversely penetrates the right side wall of the tank body 32, the right end of the steam supply pipe 61 is fixedly connected to a plurality of groups of transverse pressurized pipes 62, and the right end of each pressurized pipe 62 is fixedly connected to a power box 63, and a worm fan 64 is rotatably connected inside the power box 63, and the right end of the axis of the worm fan 64 is fixedly connected to the input shaft end of the generator 65, and the power box 63 is fixedly connected to a pair of transverse steam outlet pipes 66 symmetrically up and down.

[0084] The second recovery mechanism 7 includes: a steam supply pipe three 71, the tapered pipe two 35 is fixedly connected to the steam supply pipe three 71, the right end of the steam outlet pipe 66 is fixedly connected to the steam supply pipe three 71, and the other end of the steam supply pipe three 71 is fixedly connected to the condensing box 72. A plurality of groups of second circulation pipes 73 are arranged at intervals on the left and right sides of the condensing box 72, and a plurality of heat conducting plates 43 are also arranged on the outer wall of the second circulation pipe 73. The top of the second circulation pipe 73 is fixedly connected to the heating network 5 through the outlet pipe two 74, and the bottom of the second circulation pipe 73 is fixedly connected to the bottom of the water supply main pipe 91 through the inlet pipe two 75. A circulation branch pipe 76 is fixedly installed on the outer wall of the turbine body 2, and the bottom water inlet and the top water outlet of the circulation branch pipe 76 are respectively connected to the inlet pipe two 75.

[0085] The recovery and drainage mechanism 8 includes: a recovery water tank 82. The bottom of the left side of the condensate tank 72 is fixedly connected to the recovery water tank 82 through a drainage pipe 1 81. The recovery water tank 82 is fixedly connected to the bottom of the tank body 1 32 and the heat conversion tank 36 through a drainage pipe 2 83 and a drainage pipe 3 84 respectively. The bottom of the recovery water tank 82 is fixedly connected to the water storage tank 9 through a water outlet pipe 4 85. A solenoid valve 3 86 is fixedly installed on the water outlet pipe 4 85.

[0086] The working principle and beneficial effects of the above technical solution are:

[0087] Working principle:

[0088] The power generation recovery mechanism 6 uses the steam generated in the heat conversion tank 36 to be transported to the power box 63 through the vertical pipe 1 38 and the steam supply pipe 2 61 to drive the worm fan 64 to rotate, thereby driving the generator 65 to generate electricity. The second recovery mechanism 7 introduces the remaining steam into the condensing box 72 through the steam supply pipe 3 71 through the steam outlet pipe 66 and the steam supply pipe 3 71, and exchanges heat with the cooling water in the second circulation pipe 73 to achieve further recovery of heat energy. The recovery and drainage mechanism 8 is responsible for recovering the condensed water in the condensing box 72 to the recovery water tank 82, and then discharges the steam condensed water in the tank body 1 32 and the heat conversion tank 36 to the recovery water tank 82 through the drainage pipe 2 83 and the drainage pipe 3 84 respectively, and finally flows into the water storage tank 9 through the water outlet pipe 4 85 to form a cycle.

[0089] Beneficial effects:

[0090] Multi-stage recovery: Through the power generation recovery mechanism 6 and the second recovery mechanism 7, multi-stage recovery of turbine waste heat is achieved, thereby improving energy utilization.

[0091] Recycling: The setting of the recovery and drainage mechanism 8 realizes the recycling of condensed water and reduces the waste of water resources.

[0092] System stability: The multi-level recovery and recycling design makes the entire system more stable and reliable.

[0093] Example 4

[0094] On the basis of Example 1, a heat exchange detection and control module is further provided, and the heat exchange detection and control module includes:

[0095] Temperature sensor 1, used to detect the temperature of the circulating water in the water inlet pipe 1 41 connected to the bottom of the heat conversion tank 36;

[0096] Temperature sensor 2, used to detect the temperature of the circulating water in the water outlet pipe 1 44 connected to the bottom of the heat conversion tank 36;

[0097] Temperature sensor three, used to detect the steam temperature value at the bottom inlet of tank body 1 32;

[0098] Temperature sensor 4, used to detect the steam temperature value at the top outlet of tank 1 32;

[0099] Air pressure sensor 1, used to detect the steam entering pressure value in the conical tube 33 at the bottom of the tank body 32;

[0100] The second air pressure sensor is used to detect the steam output pressure value in the second conical tube 35 at the top of the tank body 32;

[0101] Alarm, used to alarm in case of abnormal situation;

[0102] The first calculation unit calculates the heat required for the first recovery mechanism 4 to reach a preset temperature when the circulating water is output from the water outlet pipe 1 44 within the detection time period based on the data of the temperature sensor 1, the temperature sensor 2, the temperature sensor 3, the air pressure sensor 1, and the air pressure sensor 2;

[0103] A second calculation unit, based on the result of the first calculation unit, calculates the heat exchange efficiency deviation evaluation value of the first recovery mechanism 4 within the detection time period;

[0104] The control unit is used to collect and process the data of each sensor, and then adjust the steam pressure value of the steam turbine input tank 1 32 and adjust the frequency of the water supply pump 90. The control unit is electrically connected to the temperature sensor 1, the temperature sensor 2, the temperature sensor 3, the temperature sensor 4, the air pressure sensor 1, the air pressure sensor 2 and the alarm respectively;

[0105] The comparison and judgment unit is used to compare and judge whether the heat exchange efficiency deviation evaluation value can meet the requirement of heating circulating water to reach a preset temperature.

[0106] The first calculation unit calculates based on the following formula 1:

[0107]

[0108] Where: Q is the heat required for the first recovery mechanism 4 to reach the preset temperature when the circulating water is output from the outlet pipe 44 during the t-t0 detection period, C p1 is the specific heat capacity of the circulating water in the first circulating pipe 42, m1 is the mass of the circulating water flowing through the first circulating pipe 42 during the t-t0 detection period, T1 is the average temperature value of the circulating water in the water inlet pipe 1 detected by the temperature sensor 1 during the t-t0 detection period, T y is the preset temperature value of the circulating water, T3 is the steam temperature value at the bottom inlet of the tank 32 detected by the temperature sensor 3, C p2 is the specific heat capacity of the steam in the tank 32, P O is the steam entry pressure value in the conical tube 33 detected by the air pressure sensor, P iis the steam output pressure value in the conical tube 2 35 detected by the air pressure sensor 2, k is the adiabatic index, k is 265, t is the detection end time, t o To detect the initial time, T t is the instantaneous temperature value of the circulating water in the outlet pipe 1 44 detected by the temperature sensor 2 at time t, T0 is the instantaneous temperature value of the circulating water in the outlet pipe 1 44 detected by the temperature sensor 2 at time t0, T max is the maximum operating temperature of the steam at the top outlet of the tank 32 detected by the temperature sensor 4, T min The minimum operating temperature of the steam at the top outlet of the tank 32 detected by the temperature sensor 4; ln is a logarithmic function, and e is a natural constant with a value of 2.72;

[0109] The second calculation unit calculates based on the following formula 2:

[0110]

[0111] Wherein: ΔA is the heat exchange efficiency deviation evaluation value of the first recovery mechanism 4 in the t-t0 detection time period, T2 is the average temperature value of the circulating water in the outlet pipe 44 detected by the temperature sensor 2 in the t-t0 detection time period, T4 is the average temperature of the steam at the top outlet of the tank body 32 detected by the temperature sensor 4, π is the value of pi, R1 is the equivalent radius of the inlet pipe 41, L1 is the length of the inlet pipe 41, R2 is the equivalent radius of the first circulation pipe 42, L2 is the length of the first circulation pipe 42, R3 is the equivalent radius of the outlet pipe 44, L3 is the length of the outlet pipe 44, η is the ratio of the inner wall of the inlet pipe 41, the first circulation pipe 42 and the outlet pipe 44 to the heat conducting plate 43, and π is the value of pi, 3.14;

[0112] The comparison and judgment unit performs comparison and judgment. When ΔA<0, the control unit increases the steam pressure of the turbine input tank 32 and reduces the frequency of the water supply pump 90. When ΔA>0.5, the control unit increases the steam pressure of the turbine input tank 32 and reduces the frequency of the water supply pump 90. When 0≤ΔA≤0.5, the heat exchange efficiency deviation evaluation value of the first recovery mechanism 4 is within a reasonable range and no adjustment is made. When ΔA is still not within a reasonable range after adjustment, the control unit controls the alarm to sound an alarm.

[0113] The working principle and beneficial effects of the above technical solution are:

[0114] Working principle:

[0115] The heat exchange detection and control module monitors the temperature and pressure values ​​in the heat conversion tank 36 and the tank body 32 in real time through the temperature sensor and the air pressure sensor, and calculates the heat required for the first recovery mechanism 4 to reach the preset temperature within the detection time period and the heat exchange efficiency deviation evaluation value. The control unit adjusts the steam pressure value of the steam turbine input tank body 32 and the frequency of the water supply pump 90 according to the calculation results to optimize the heat recovery efficiency. When the heat exchange efficiency deviation evaluation value exceeds the reasonable range, the control unit controls the alarm to sound an alarm.

[0116] Beneficial effects:

[0117] Real-time monitoring: Real-time monitoring of temperature and pressure values ​​through temperature sensors and air pressure sensors provides data support for optimizing heat recovery.

[0118] Intelligent regulation: The control unit intelligently adjusts the steam pressure and 90° frequency of the water supply pump according to real-time monitoring data, thereby optimizing the heat recovery efficiency.

[0119] Safety guarantee: When the heat exchange efficiency deviation assessment value exceeds the reasonable range, the alarm will sound in time to ensure the safe operation of the device.

[0120] High efficiency and energy saving: Through real-time monitoring and intelligent adjustment, high efficiency and energy saving of heat recovery are achieved.

Claims

1. A steam turbine waste heat recovery device, characterized in that: include: A base plate (1), a steam turbine body (2), a first recovery mechanism (4), a second recovery mechanism (7), a power generation recovery mechanism (6) and a controller (3); the steam turbine body (2) is fixedly mounted on the top right side of the base plate (1); the left output end of the steam turbine body (2) is fixedly connected to the first recovery mechanism (4); a power generation recovery mechanism (6) is fixedly arranged on the right side of the top of the first recovery mechanism (4); the output end of the first recovery mechanism (4) is fixedly connected to the second recovery mechanism (7); and the first recovery mechanism (4), the second recovery mechanism (7) and the power generation recovery mechanism (6) are all electrically connected to the controller (3) respectively.

2. A steam turbine waste heat recovery device according to claim 1, characterized in that: The first recovery mechanism (4) comprises: a bracket (31), the bracket (31) being fixedly mounted on the bottom plate (1) and located on the left side of the steam turbine body (2), a vertical tank body (32) being fixedly mounted on the top of the bracket (31), a conical pipe (33) being fixedly connected to the inlet at the bottom end of the tank body (32), the conical pipe (33) being fixedly connected to the outlet of the steam turbine body (2) through a first steam supply pipe (34), a conical pipe (35) being fixedly connected to the top of the tank body (32), a vertical heat conversion tank (36) being fixedly mounted inside the tank body (32), and a plurality of corrugated plates (37) being fixedly distributed inside and outside the side wall of the heat conversion tank (36).

3. A steam turbine waste heat recovery device according to claim 2, characterized in that: A rotary spray evaporation mechanism is fixedly provided in the heat conversion tank (36); The rotary spray evaporation mechanism comprises: a vertical pipe (38), the top of the heat conversion tank (36) is fixedly connected to the vertical pipe (38), the bottom end of the inner wall of the vertical pipe (38) is fixedly installed with a horizontal bar (39) along the left and right directions, the center of the horizontal bar (39) is fixedly installed with a vertical sleeve (310), the sleeve (310) is rotatably connected to a vertical water supply pipe (311), the top of the water supply pipe (311) is rotatably connected to a water supply pipe (312), the water supply pipe (312) laterally penetrates the vertical pipe (38) and the left side wall of the tank body (32), an electromagnetic valve (313) is fixedly installed on the water supply pipe (312), the bottom end of the water supply pipe (311) is fixedly connected to a horizontal spray pipe (314), and the left and right ends of the spray pipe (314) are symmetrically fixedly connected to a pair of vertical spray pipes (315).

4. The steam turbine waste heat recovery device according to claim 3, characterized in that: The bottom end of the spray pipe 1 (314) is fixedly connected to a plurality of nozzles 1 (316) at equal intervals on the left and right sides, and the left and right side walls of the spray pipe 2 (315) are fixedly connected to a plurality of nozzles 2 (317) at equal intervals on the top and bottom sides; a vertical water inlet pipe 1 (41) is fixedly provided on the left side of the bottom of the heat conversion tank (36); the top of the water inlet pipe 1 (41) is fixedly connected to the top water inlet of the first circulation pipe (42); the outer wall of the first circulation pipe (42) is fixedly connected to a plurality of heat conducting plates (43); the bottom water outlet of the first circulation pipe (42) is fixedly connected to a vertical water outlet pipe 1 (44); the right end of the water outlet pipe 1 (44) is fixedly connected to a heating pipe network (5).

5. The steam turbine waste heat recovery device according to claim 4, characterized in that: A water storage tank (9) is fixedly mounted on the top of the left side of the bottom plate (1). The top of the water storage tank (9) is fixedly connected to a water supply pump (90). The water delivery port at the right end of the water supply pump (90) is fixedly connected to a vertical water supply pipe (91). The top of the water supply pipe (91) is fixedly connected to a second water supply pipe (312). The middle of the water supply pipe (91) is fixedly connected to a first transverse pipe (92). A second solenoid valve (93) is fixedly mounted on the first transverse pipe (92). The first transverse pipe (92) passes through the left side wall of the tank body (32) from left to right and is connected to a first water inlet pipe (41). A controller (3) is fixedly mounted on the front outer wall of the water storage tank (9).

6. The steam turbine waste heat recovery device according to claim 3, characterized in that: The power generation recovery mechanism (6) comprises: a second steam supply pipe (61), the first vertical pipe (38) is fixedly connected to the second steam supply pipe (61) in the left and right directions, the second steam supply pipe (61) horizontally penetrates the right side wall of the first tank (32), the right end of the second steam supply pipe (61) is fixedly connected to a plurality of groups of horizontal pressurized pipes (62), the right end of each pressurized pipe (62) is fixedly connected to a power box (63), the power box (63) is rotatably connected to a volute (64), the right end of the axis of the volute (64) is fixedly connected to the input shaft end of the generator (65), and the power box (63) is fixedly connected to a pair of horizontal steam outlet pipes (66) symmetrically up and down.

7. The steam turbine waste heat recovery device according to claim 2, characterized in that: The second recovery mechanism (7) comprises: a steam supply pipe (71), the second conical pipe (35) is fixedly connected to the steam supply pipe (71), the right end of the steam outlet pipe (66) is fixedly connected to the steam supply pipe (71), the other end of the steam supply pipe (71) is fixedly connected to the condenser box (72), a plurality of groups of second circulation pipes (73) are arranged at intervals on the left and right sides of the condenser box (72), the outer wall of the second circulation pipe (73) is also provided with a plurality of heat conducting plates (43), the top of the second circulation pipe (73) is fixedly connected to the heating pipe network (5) through the second outlet pipe (74), the bottom of the second circulation pipe (73) is fixedly connected to the bottom of the water supply main pipe (91) through the second inlet pipe (75), the outer wall of the turbine body (2) is fixedly installed with a circulation branch pipe (76), the bottom water inlet and the top water outlet of the circulation branch pipe (76) are respectively connected to the second inlet pipe (75).

8. The steam turbine waste heat recovery device according to claim 7, characterized in that: The recovery and drainage mechanism (8) comprises: a recovery water tank (82); the bottom of the left side of the condenser tank (72) is fixedly connected to the recovery water tank (82) through a drainage pipe 1 (81); the recovery water tank (82) is fixedly connected to the bottom of the tank body 1 (32) and the heat conversion tank (36) through a drainage pipe 2 (83) and a drainage pipe 3 (84); the bottom of the recovery water tank (82) is fixedly connected to the water storage tank (9) through a water outlet pipe 4 (85); and a solenoid valve 3 (86) is fixedly installed on the water outlet pipe 4 (85).

9. The steam turbine waste heat recovery device according to claim 8, characterized in that: A heat exchange detection and control module is also provided, which includes: Temperature sensor 1, used to detect the temperature of circulating water in water inlet pipe 1 (41) connected to the bottom of the heat conversion tank (36); Temperature sensor 2, used to detect the temperature of circulating water in water outlet pipe 1 (44) connected to the bottom of the heat conversion tank (36); Temperature sensor three, used to detect the steam temperature value at the bottom inlet of tank body one (32); Temperature sensor 4, used to detect the steam temperature value at the top outlet of tank body 1 (32); Air pressure sensor 1, used to detect the steam entering pressure value in conical tube 1 (33) at the bottom of tank body 1 (32); A second air pressure sensor, used to detect the steam output pressure value in a second conical tube (35) at the top of the first tank (32); Alarm, used to alarm in case of abnormal situation; A first calculation unit calculates the amount of heat required for the circulating water of the first recovery mechanism (4) to reach a preset temperature when it is output from the water outlet pipe (44) within a detection time period based on data from the first temperature sensor, the second temperature sensor, the third temperature sensor, the first air pressure sensor, and the second air pressure sensor; A second calculation unit, based on the result of the first calculation unit, calculates a heat exchange efficiency deviation evaluation value of the first recovery mechanism (4) within a detection time period; A control unit is used to collect and process data from various sensors, thereby adjusting the steam pressure value of the steam turbine input tank body 1 (32) and adjusting the frequency of the water supply pump (90), and the control unit is electrically connected to the temperature sensor 1, the temperature sensor 2, the temperature sensor 3, the temperature sensor 4, the air pressure sensor 1, the air pressure sensor 2 and the alarm respectively; The comparison and judgment unit is used to compare and judge whether the heat exchange efficiency deviation evaluation value can meet the requirement of heating circulating water to reach a preset temperature.

10. The steam turbine waste heat recovery device according to claim 8, characterized in that: include: The first calculation unit calculates based on the following formula 1: Where: Q is the heat required by the first recovery mechanism (4) to reach the preset temperature when the circulating water is output from the outlet pipe 1 (44) during the detection period t-t0, C p1 is the specific heat capacity of the circulating water in the first circulating pipe (42), m1 is the mass of the circulating water flowing through the first circulating pipe (42) during the detection time period t-t0, T1 is the average temperature value of the circulating water in the water inlet pipe 1 detected by the temperature sensor 1 during the detection time period t-t0, T y is the preset temperature value of the circulating water, T3 is the steam temperature value at the bottom inlet of the tank body 1 (32) detected by the temperature sensor 3, C p2 is the specific heat capacity of the steam in tank 1 (32), P O is the steam entry pressure value in the conical tube (33) detected by the air pressure sensor, P i is the steam output pressure value in the conical tube 2 (35) detected by the air pressure sensor 2, k is the adiabatic index, k is 265, t is the detection end time, t o To detect the initial time, T t is the instantaneous temperature value of the circulating water in the outlet pipe 1 (44) detected by the temperature sensor 2 at time t, T0 is the instantaneous temperature value of the circulating water in the outlet pipe 1 (44) detected by the temperature sensor 2 at time t0, T max is the maximum operating temperature of the steam at the top outlet of the tank body 1 (32) detected by the temperature sensor 4, T min The minimum operating temperature of the steam at the top outlet of the tank body 1 (32) detected by the temperature sensor 4; ln is a logarithmic function, and e is a natural constant with a value of 2.72; The second calculation unit calculates based on the following formula 2: Wherein: ΔA is the heat exchange efficiency deviation evaluation value of the first recovery mechanism (4) within the t-t0 detection time period, T2 is the average temperature value of the circulating water in the outlet pipe (44) detected by the temperature sensor 2 within the t-t0 detection time period, T4 is the average temperature of the steam at the top outlet of the tank body (32) detected by the temperature sensor 4, π is the value of pi, R1 is the equivalent radius of the inlet pipe (41), L1 is the length of the inlet pipe (41), R2 is the equivalent radius of the first circulation pipe (42), L2 is the length value of the first circulation pipe (42), R3 is the equivalent radius of the outlet pipe (44), L3 is the length value of the outlet pipe (44), η is the ratio of the inner wall of the inlet pipe (41), the first circulation pipe (42) and the outlet pipe (44) to the heat conducting plate (43), and π is the value of pi, which is 3.14; The comparison and judgment unit performs comparison and judgment. When ΔA<0, the control unit increases the steam pressure of the steam turbine input tank body 1 (32) and reduces the frequency of the water supply pump (90). When ΔA>0.5, the control unit increases the steam pressure of the steam turbine input tank body 1 (32) and reduces the frequency of the water supply pump (90). When 0≤ΔA≤0.5, the heat exchange efficiency deviation evaluation value of the first recovery mechanism (4) is within a reasonable range and no adjustment is made. When ΔA is still not within a reasonable range after adjustment, the control unit controls the alarm to sound an alarm.

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