Temperature regulation and control and energy efficiency optimization system of waste heat recovery power generation device

Abstract

The invention provides a temperature regulation and control and energy efficiency optimization system of a waste heat recovery power generation device, relates to the technical field of waste gas waste heat power generation, and solves the technical problems that a flexible and efficient temperature control system is lacked in the prior art, the temperature gradient can be automatically adjusted under different working conditions, and the maximum power generation efficiency is ensured. According to the technical scheme, the system comprises a waste heat power generation device, a heat pipe and a multi-valve hierarchical adjusting pipeline system composed of a plurality of two-position two-way valves, optimization of the temperature gradient in the waste heat collection and utilization process is achieved by adjusting the water flow path and flow, and therefore the efficiency of the waste heat power generation device and the waste heat utilization rate are improved; the system has high adjusting flexibility, effective control can be carried out according to external demand changes, and the purposes of improving the power generation efficiency and the waste heat utilization rate, saving energy and reducing emission are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas waste heat power generation, and in particular to a temperature control and energy efficiency optimization system for a waste heat recovery power generation device. Background Art

[0002] With the advancement of industrialization, a large amount of waste gas heat energy is generated. Traditional waste gas recovery devices usually rely on simple temperature control systems, which are difficult to effectively adjust the temperature according to changes in the external environment, thus affecting the power generation efficiency and overall performance of the waste heat recovery device. The existing technology lacks a flexible and efficient temperature control system that can automatically adjust the temperature gradient under different working conditions of water tank heating mode, water tank cooling mode and normal mode to ensure maximum power generation efficiency. Summary of the invention

[0003] Therefore, the present invention solves the technical problem that the prior art lacks a flexible and efficient temperature control system that can automatically adjust the temperature gradient under different working conditions to ensure maximum power generation efficiency; the present invention provides a temperature control and energy efficiency optimization system for a waste heat recovery power generation device, which can optimize the working state of the temperature control and energy efficiency optimization system of the waste heat recovery power generation device by adjusting the water flow temperature and temperature difference in the water tank, thereby improving power generation efficiency, reducing energy consumption, and improving energy utilization.

[0004] The present invention provides a temperature control and energy efficiency optimization system for a waste heat recovery power generation device, comprising: a waste heat power generation device, on which a heat pipe is arranged; a multi-valve hierarchical regulation pipeline system is arranged next to the waste heat power generation device; the waste heat power generation device is used to absorb the heat emitted by the heat pipe to generate electricity; the multi-valve hierarchical regulation pipeline system is used to control the temperature in the waste heat power generation device. Different flow rates and flow directions are achieved by controlling different valve combinations. In addition, the temperature gradient of the water tank is regulated, so that the equipment can adapt to different working conditions and optimize the working efficiency and energy utilization of the equipment.

[0005] Furthermore, the waste heat power generation device includes a double-layer water tank, a third thermoelectric power generation unit is arranged on the double-layer water tank, and a thermal conductive ceramic is arranged on the third thermoelectric power generation unit; a collector is arranged below the double-layer water tank, and a second thermoelectric power generation unit is arranged between the collector and the double-layer water tank; a single-layer water tank is arranged below the collector, and a first thermoelectric power generation unit is arranged between the single-layer water tank and the collector. The first thermoelectric power generation unit is coated with thermal conductive glue on the contact surface with the single-layer water tank and the collector; the second thermoelectric power generation unit is coated with thermal conductive glue on the contact surface with the collector and the double-layer water tank; and the third thermoelectric power generation unit is coated with thermal conductive glue on the contact surface with the double-layer water tank and the thermal conductive ceramic. The upper surface of the thermal conductive ceramic is tightly attached to the heat pipe. The heat of the external device is transferred to the hot end of the third thermoelectric power generation unit through the heat pipe to generate electricity, or the heat of the collector is transferred to the external device for utilization, so as to achieve coupling with the external device. Thermal conductive glue is applied to the contact surface to increase the contact area and improve the power generation efficiency.

[0006] Furthermore, the single-layer water tank is provided with fishbone-shaped fins; a water inlet is provided on one side of the single-layer water tank, connected to the water inlet pipe, and a water outlet is provided on the other side of the single-layer water tank, connected to the water outlet pipe.

[0007] Furthermore, the double-layer water tank is separated by a thick thin plate in the middle, the lower half area is the primary water tank, and the upper half area is the secondary water tank.

[0008] Furthermore, the upper and lower walls of the first-level water tank and the second-level water tank are staggered with fishbone-shaped fins; the left side of the first-level water tank is provided with two first-level water tank water inlet holes, which are connected to the first-level water tank shunt pipe; the left side of the second-level water tank is provided with two second-level water tank water inlet holes, which are connected to the second-level water tank shunt pipe. The right side of the double-layer water tank is provided with a boss, the middle of which is provided with a double-layer water tank water outlet hole; the thickness thin plate is provided with a notch near the double-layer water tank water outlet hole area to connect the first-level water tank and the second-level water tank.

[0009] Furthermore, the multi-valve hierarchical regulation pipeline system includes a water tank main water outlet valve, whose water inlet end is connected to the water outlet hole of the double-layer water tank through a water pipe, and the water outlet end is connected to the water outlet pipe of the single-layer water tank and then leads to an additional separate water tank through the main water outlet; the water outlet pipeline of the water pump is connected to the water inlet end of the diversion pipe; the diversion pipe is provided with two water outlet ends, one of which is connected to the water inlet pipe of the single-layer water tank, and the other is connected to the water inlet end of the main valve of the double-layer water tank; the main valve of the double-layer water tank is provided with two water outlet ends , one is connected to the water inlet end of the first-level water tank inlet valve, and the other is connected to the water inlet end of the second-level water tank inlet valve; the water outlet end of the first-level water tank inlet valve is connected to the water inlet hole of the first-level water tank; the water outlet end of the second-level water tank inlet valve is connected to the water inlet hole of the second-level water tank; the pipeline between the second-level water tank inlet valve and the second-level water tank inlet hole is provided with a adapter, which connects the second-level water tank outlet valve, and the outlet end of the second-level water tank outlet valve is connected to the outlet end of the main outlet valve and the main outlet and then leads to the water tank. Different flow rates and flow directions can be achieved by controlling different valve combinations. Then the temperature gradient of the water tank can be regulated, so that the equipment can adapt to different working conditions and optimize the working efficiency and energy utilization of the equipment.

[0010] Furthermore, the collector is divided into two parts, an upper part and an lower part, which are fixed by welding; baffles are staggeredly distributed on the upper and lower inner walls of the collector to enhance heat transfer.

[0011] Furthermore, the collector has holes on both sides, the left hole is connected to a high temperature resistant bellows, and the engine exhaust is transported to the collector through the bellows and discharged from the right hole after heat collection.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The temperature control and energy efficiency optimization system of a waste heat recovery power generation device provided by the present invention realizes different flow rates and flow directions by controlling different valve combinations. It further realizes the control of the temperature gradient of the water tank, enables the device to adapt to different working conditions, optimizes the working efficiency of the device and the energy utilization rate; it is suitable for different types of waste heat power generation devices, and can automatically adjust according to changes in the external environment, and has strong adaptability.

[0014] 2. The temperature control and energy efficiency optimization system of a waste heat recovery power generation device provided by the present invention improves the working efficiency of the waste heat power generation device, especially can be efficiently adjusted according to the temperature difference under different working conditions; by intelligently controlling the water tank temperature, the service life of the power generation sheet is extended, avoiding the reduction of efficiency due to excessively high or low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a front view of the waste heat power generation device of the present invention;

[0018] Figure 3a It is a front view of the double-layer water tank of the present invention;

[0019] Figure 3b It is a left side view of the double-layer water tank of the present invention;

[0020] Figure 3c It is a top view of the double-layer water tank of the present invention;

[0021] Figure 3d It is a right side view of the double-layer water tank of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the multi-valve hierarchical regulation pipeline system of the present invention;

[0023] Figure 5 This is a working principle diagram of Example 1;

[0024] Figure 6 This is a working principle diagram of the first stage of Example 2;

[0025] Figure 7 This is a working principle diagram of the second stage of Example 2;

[0026] Figure 8 This is a working principle diagram of the three stages of Example 2;

[0027] Fig. 9 This is a working principle diagram of the four stages of Example 2;

[0028] Fig.10 This is a working principle diagram of Example 3.

[0029] Description of reference numerals:

[0030] 1. Heat pipe; 2. Waste heat power generation device; 21. Collector; 22. Single-layer water tank; 23. Double-layer water tank; 231. Secondary water tank; 232. Primary water tank; 233. Fishbone fin; 234. Water inlet of primary water tank; 235. Water inlet of secondary water tank; 236. Boss; 237. Water outlet of double-layer water tank; 238. Thickness plate; 24. First temperature difference power generation unit; 25. Second temperature difference power generation unit; 26. Third temperature difference power generation unit; 27. Thermal conductive ceramic; 3. Multi-valve hierarchical regulating pipeline system; 31. Main water outlet valve; 32. Double-layer water tank main valve; 33. Secondary water tank inlet valve; 34. Secondary water tank outlet valve; 35. First water tank inlet valve; 36. Diverter pipe; 37. Main water outlet; 38. Secondary water tank diverter pipe; 39. First water tank diverter pipe. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0033] The embodiment of the present invention adopts a multi-stage water tank structure and realizes temperature control through different types of valves. In actual use, the user can adjust the water flow temperature in the water tank by setting different valve combinations according to different exhaust gas emissions and heat exchange requirements.

[0034] In specific implementation, a suitable valve combination is selected according to the working conditions to ensure that the water tank temperature is kept within the optimal range to improve the power generation efficiency. By setting different working conditions, the system can work flexibly in different environments to meet actual needs. The present invention is further explained below in conjunction with the accompanying drawings.

[0035] Example 1

[0036] like Figure 1As shown, a temperature control and energy efficiency optimization system for a waste heat recovery power generation device includes a heat pipe 1, a waste heat power generation device 2, and a multi-valve hierarchical adjustment pipeline system 3. The heat pipe 1 is arranged on the upper surface of the thermal conductive ceramic 27 on the top of the waste heat power generation device 2, and a thermal conductive glue is applied on the contact surface; the multi-valve hierarchical adjustment pipeline system 3 is connected to the water inlet and outlet of each water tank in the waste heat power generation device 2.

[0037] like Figure 2 As shown, the waste heat power generation device 2 is arranged from top to bottom, including a thermal conductive ceramic 27 , a first temperature difference power generation unit 24 , a double-layer water tank 23 , a second temperature difference power generation unit 25 , a collector 21 , a third temperature difference power generation unit 26 , and a single-layer water tank 22 .

[0038] like Figures 3a to 3d As shown, the double-layer water tank 23 includes a secondary water tank 231, a primary water tank 232, a herringbone fin 233, a primary water tank water inlet 234, a secondary water tank water inlet 235, a boss 236, a double-layer water tank water outlet 237, and a thickness plate 238. The primary water tank 232 is separated from the secondary water tank 231 by a thickness plate 238, and the thickness plate 238 leaves a space for connecting the primary water tank 232 and the secondary water tank 231.

[0039] The upper and lower inner walls of the primary water tank 232 and the secondary water tank 231 are provided with fishbone-shaped fins 233, two primary water tank water inlet holes 234 and a secondary water tank water inlet hole 235 are respectively opened on the left side, a boss 236 is provided on the right side, and a double-layer water tank water outlet hole 237 is provided in the middle of the boss 236.

[0040] like Figure 4 As shown, the multi-valve hierarchical regulating pipeline system 3 includes a double-layer water tank main outlet valve 31, a double-layer water tank main valve 32, a secondary water tank inlet valve 33, a secondary water tank outlet valve 34, a primary water tank inlet valve 35, a diverter pipe 36, a total water outlet 37, a secondary water tank diverter pipe 38, a primary water tank diverter pipe 39 and a number of pipeline adapters. The water tanks at each level are connected by valves in different states, and the water flow path and flow rate are adjusted by adjusting the switch state of each valve to optimize the temperature gradient of the water tank.

[0041] Specifically, Figure 5As shown, working condition 1 is the system cooling mode. When a large amount of waste heat is transferred from the outside to the heat-conducting ceramic 27 through the heat pipe 1 and a large amount of waste heat is accumulated in the collector 21, the main water outlet valve 31, the double-layer water tank main valve 32, the secondary water tank inlet valve 33, and the primary water tank inlet valve 35 are opened, and the secondary water tank outlet valve 34 is closed. The water flow drawn from the water tank by the water pump is diverted at the diverter pipe 36. Part of the water flow enters the single-layer water tank 22 along the water inlet pipe of the single-layer water tank 22 to play a cooling role, and then flows out from the water outlet of the single-layer water tank 22 and merges into the water tank. After part of the water flows out of the double-layer water tank main valve 32, it continues to be divided. Part of the water flows through the primary water tank inlet valve 35 and enters the primary water tank 232 for cooling, and then flows out through the double-layer water tank main outlet valve 31, and then flows into the water tank after being collected; part of the water flows through the secondary water tank inlet valve 33 and enters the secondary water tank 231 for cooling, and then flows out through the double-layer water tank main outlet valve 31, and then flows into the water tank after being collected. Since the water flow is divided at the double-layer water tank main valve 32, the temperature distribution inside the double-layer water tank 23 is relatively uniform. In this process, the internal ambient temperature of the single-layer water tank 22, the primary water tank 232 and the secondary water tank 231 is slightly lower than the external ambient temperature, and the first temperature difference power generation unit 24 and the second temperature difference power generation unit 25 reach the maximum power generation efficiency of the system; if the temperature of the heat transferred by the heat pipe 1 is slightly lower than the temperature of the collector 21, the temperature difference is relatively small, so the power generation efficiency of the third temperature difference power generation unit 26 is slightly lower than that of the other two groups.

[0042] Example 2

[0043] Working condition 2: Since the external equipment needs a lot of waste heat at this time, the collector 21 accumulates a lot of waste heat, and the system needs to switch to the heating mode to achieve the goal of transferring the waste heat of the collector 21 to the external equipment. The working principle is to use the collector 21 as a heat source to heat the double-layer water tank 23 by thermal conduction and thermal radiation, so as to transfer the heat to the outside through the heat pipe. This process is achieved by adjusting the switch state of each valve through four stages: heating start-up stage, temperature difference balance stage, heat transfer stage and temperature recovery stage.

[0044] Specifically, Figure 6As shown, it is the heating start-up stage. The heat pipe 1 no longer transfers heat from the external device, so there is no temperature difference between the thermal conductive ceramic 27 and the double-layer water tank 23, and the third group of temperature difference power generation units 26 stops working. At the same time, the water tank main water outlet valve 31, the secondary water tank inlet valve 33, and the secondary water tank outlet valve 34 are closed, and the double-layer water tank main valve 32 and the primary water tank inlet valve 35 are opened. The double-layer water tank outlet hole 237 stops discharging water, and the secondary water tank inlet hole 235 stops receiving water. The water flow drawn from the water tank by the pump is divided at the outlet of the water pump. Part of the water flow enters the single-layer water tank along the single-layer water tank inlet pipe, plays a cooling role, and then flows out from the single-layer water tank outlet and merges into the water tank. Part of the water flow no longer flows out of the double-layer water tank main valve 32, and directly enters the primary water tank 232 through the primary water tank inlet valve 35, slowly fills to the thickness of the thin plate 238, and enters the secondary water tank 231 through the gap. During this process, the water flow in the secondary water tank 231 continuously receives the heat from the collector 21 and cannot be discharged, so the temperature inside the secondary water tank 231 increases slowly, and the temperature difference decreases slowly, so the power generation efficiency of the second thermoelectric power generation unit 25 decreases slowly; the internal ambient temperature of the single-layer water tank 22 and the power generation efficiency of the first thermoelectric power generation unit 24 are not affected in this working condition, which is consistent with Example 1. The main purpose of this stage is to allow water to enter the water tank for cooling, maintain the working conditions of the second thermoelectric power generation unit 25, and charge heat while cooling to prepare for the next stage.

[0045] Specifically, Figure 7 As shown, it is the temperature difference balance stage, the secondary water tank inlet valve 33 is opened, and the water flow convects between the primary water tank and the secondary water tank, delaying the reduction of the temperature difference, maintaining a high power generation efficiency, and preparing for further heating. The cold water flow is divided at the double-layer water tank main valve 32, a part of which continues to enter the primary water tank 232 to absorb heat, and the other part enters the secondary water tank 231 through the secondary water tank inlet valve 33, convects with the hot water in the primary water tank 232, reduces the internal ambient temperature of the primary water tank 232, delays the reduction of the temperature difference and the speed at which the power generation efficiency of the second temperature difference power generation unit 25 decreases, accelerates the filling of the double-layer water tank 23, and prepares to enter the heat transfer stage.

[0046] Specifically, Figure 8As shown, the heat transfer stage. The main valve 32 of the double-layer water tank is closed, the water inlet valve 33 of the secondary water tank is closed, and the water outlet valve 34 of the secondary water tank is closed to a small flow rate. At this time, the double-layer water tank 23 is full, and the internal water flow continues to be heated by the collector 21. After a period of time, it is heated to a temperature close to the internal temperature of the collector 21, and the internal pressure of the double-layer water tank 23 is released through the water outlet valve 34 of the secondary water tank. In this stage, the double-layer water tank 23 conducts or radiates heat to the thermal conductive ceramic 27, and transfers the heat to the external heat-using equipment through the heat pipe 1. At the same time, due to the small temperature difference, the power generation efficiency of the second thermoelectric power generation unit 25 is reduced to the minimum; and since the secondary water tank 231 is the hot end and the thermal conductive ceramic 27 is the cold end at this time, the third thermoelectric power generation unit 26 resumes work and has a good power generation efficiency. The main purpose of this stage is to efficiently heat the double-layer water tank, transfer heat from the collector to the external equipment through the double-layer water tank, and realize the effective use of thermal energy.

[0047] Specifically, Fig. 9 As shown, the temperature recovery stage. The water tank main water outlet valve 31, the double-layer water tank main valve 32, the secondary water tank water outlet valve 34, and the primary water tank water inlet valve 35 are opened. In this stage, the heat-using external equipment no longer uses heat. In order to restore the power generation efficiency of the three groups of temperature difference power generation units, the water tank main water outlet valve 31 and the secondary water tank water outlet valve 34 are opened to discharge hot water, and the secondary water tank water inlet hole 235 is converted into a water outlet; the double-layer water tank main valve 32 and the primary water tank water inlet valve 35 are opened to inject new cold water into the double-layer water tank 23 to accelerate the reduction of the internal temperature of the double-layer water tank 23, so as to complete the transition to the valve and pipeline combination of working condition 1 or working condition 3 according to demand. In this stage, due to the rapid reduction of the internal temperature of the double-layer water tank 23, the power generation efficiency of the second temperature difference power generation unit 25 is rapidly improved, and the power generation efficiency of the third temperature difference power generation unit 26 is rapidly reduced to the minimum. The main purpose of this stage is to reset the temperature, adjust the valve to inject cold water into the water tank, quickly reduce the internal temperature of the water tank, restore to the temperature difference range suitable for power generation, and prepare to switch the working mode again.

[0048] Example 3

[0049] Working condition 3: There is little heat exchange between the external equipment and the waste heat power generation device, that is, the normal working state. Fig.10As shown, the water tank main water outlet valve 31 and the secondary water tank inlet valve 33 are closed, and the double-layer water tank main valve 32, the secondary water tank outlet valve 34, and the primary water tank inlet valve 35 are opened. The water flow extracted from the water tank by the pump is split at the water pump outlet. Part of the water flow enters the single-layer water tank 22 along the single-layer water tank inlet pipe, plays a cooling role, and then flows out from the single-layer water tank outlet and merges into the water tank. Part of the water flow flows in the order of the double-layer water tank main valve 32-the primary water tank inlet valve 35-the primary water tank 232-the secondary water tank 231-the secondary water tank outlet valve 34-the water tank. The process of the water flow flowing in the primary water tank 232 and the secondary water tank 231 to the discharge is relatively long, which can give full play to the cooling effect of the water flow, and at the same time heat the water flow, so that it has a certain temperature when it enters the secondary water tank 231, forming a temperature difference with the external environment, so that the third temperature difference power generation unit 26 can operate at a lower working efficiency without an external heat source. At this time, the temperature difference between the primary water tank 232 and the collector 21 is lower than that in the embodiment, so the power generation efficiency of the second temperature difference power generation unit 25 is slightly reduced, but the energy consumption is reduced and the stability of the system operation is improved.

[0050] The system adjusts the valve status according to changes in external demand to achieve water tank temperature control, thereby improving the efficiency of the temperature control and energy efficiency optimization system of the waste heat recovery power generation device.

[0051] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A temperature control and energy efficiency optimization system for a waste heat recovery power generation device, characterized in that: include: A waste heat power generation device (2), wherein a heat pipe (1) is arranged on the waste heat power generation device (2); a multi-valve hierarchical regulating pipeline system (3) is arranged next to the waste heat power generation device (2); the waste heat power generation device (2) is used for generating electricity; and the multi-valve hierarchical regulating pipeline system (3) is used for controlling the temperature inside the waste heat power generation device (2).

2. The temperature control and energy efficiency optimization system of the waste heat recovery power generation device according to claim 1 is characterized in that: The waste heat power generation device (2) comprises a double-layer water tank (23), a third temperature difference power generation unit (26) is arranged on the double-layer water tank (23), and a heat-conducting ceramic (27) is arranged on the third temperature difference power generation unit (26); a heat collector (21) is arranged below the double-layer water tank (23), and a second temperature difference power generation unit (25) is arranged between the heat collector (21) and the double-layer water tank (23); a single-layer water tank (22) is arranged below the heat collector (21), and a first temperature difference power generation unit (24) is arranged between the single-layer water tank (22) and the heat collector (21).

3. The temperature control and energy efficiency optimization system of the waste heat recovery power generation device according to claim 2 is characterized in that: The single-layer water tank (22) is provided with a fishbone-shaped fin (233); one side of the single-layer water tank (22) is provided with a water inlet connected to the water inlet pipe, and the other side is provided with a water outlet connected to the water outlet pipe.

4. The temperature control and energy efficiency optimization system of the waste heat recovery power generation device according to claim 3 is characterized in that: The double-layer water tank (23) is separated in the middle by a thick thin plate (238), the lower half area is a primary water tank (232), and the upper half area is a secondary water tank (231).

5. The temperature control and energy efficiency optimization system of the waste heat recovery power generation device according to claim 3 is characterized in that: The upper and lower walls of the first-level water tank (232) and the second-level water tank (231) are staggered with fishbone-shaped fins (233); the left side of the first-level water tank (232) is provided with two first-level water tank water inlet holes (234) connected to the first-level water tank shunt pipe (39); the left side of the second-level water tank (231) is provided with two second-level water tank water inlet holes (235) connected to the second-level water tank shunt pipe (38). The right side of the double-layer water tank (23) is provided with a boss (236), the middle of which is opened and provided with a double-layer water tank water outlet hole (237); the thickness thin plate (238) is provided with a notch near the double-layer water tank water outlet hole (237) to connect the first-level water tank (232) and the second-level water tank (231).

6. The temperature control and energy efficiency optimization system of the waste heat recovery power generation device according to claim 5, characterized in that: The multi-valve hierarchical regulating pipeline system (3) comprises a water tank main water outlet valve (31), whose water inlet end is connected to the water outlet hole (237) of the double-layer water tank through a water pipe, and whose water outlet end is connected to the water outlet pipe of the single-layer water tank and then leads to the water tank through the main water outlet (37); the water outlet pipeline of the water pump is connected to the water inlet end of the diverter pipe (36); the diverter pipe (36) is provided with two water outlet ends, one of which is connected to the water inlet pipe of the single-layer water tank (22), and the other is connected to the water inlet end of the main valve (32) of the double-layer water tank; the main valve (32) of the double-layer water tank is provided with two water outlet ends, one of which is connected to the water inlet valve ( The first water tank inlet valve (35) is connected to the water inlet end, and the second water tank inlet valve (33) is connected to the water inlet end of the second water tank; the first water tank inlet valve (35) is connected to the water inlet hole (234) of the first water tank; the second water tank inlet valve (33) is connected to the water inlet hole (235) of the second water tank; the pipeline between the second water tank inlet valve (33) and the second water tank inlet hole (235) is provided with a conversion joint, which is connected to the second water tank outlet valve (34); the outlet end of the second water tank outlet valve (34) is connected to the outlet end of the main outlet valve (31) and the main outlet (37) and then leads to the water tank.

7. The temperature control and energy efficiency optimization system of the waste heat recovery power generation device according to claim 2, characterized in that: The heat collector (21) is divided into two parts, an upper part and an lower part, which are connected and fixed by welding; baffles are staggeredly distributed on the upper and lower inner walls of the heat collector (21).

8. The temperature control and energy efficiency optimization system of the waste heat recovery power generation device according to claim 7, characterized in that: The collector (21) has holes on both sides, the left hole is connected to a high temperature resistant corrugated pipe, and the engine exhaust is transported to the collector (21) through the corrugated pipe and discharged from the right hole after heat collection.

9. The temperature control and energy efficiency optimization system of the waste heat recovery power generation device according to claim 2, characterized in that: The contact surfaces of the first temperature difference power generation unit (24) with the single-layer water tank (22) and the heat collector (21) are coated with heat conductive glue; the contact surfaces of the second temperature difference power generation unit (25) with the heat collector (21) and the double-layer water tank (23) are coated with heat conductive glue; and the contact surfaces of the third temperature difference power generation unit (26) with the double-layer water tank (23) and the heat conductive ceramic (27) are coated with heat conductive glue.

10. The temperature control and energy efficiency optimization system of the waste heat recovery power generation device according to claim 9, characterized in that: The upper surface of the thermally conductive ceramic (27) is tightly fitted to the heat pipe (1).

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