Intelligent control system for waste heat recovery

Abstract

The utility model provides an intelligent control system for waste heat recovery, and belongs to the technical field of waste heat recovery. Comprising a heat exchanger and a preheating bin, the preheating bin is arranged on the periphery of a cold medium leading-in pipe of the heat exchanger, and the preheating bin is used for preheating a medium in the cold medium leading-in pipe; the two gas outlet ends of the tee joint are connected with a heat medium inlet of the heat exchanger and the gas inlet end of the preheating bin respectively, and the tee joint is used for guiding waste heat gas into the heat exchanger and the preheating bin. Through cooperation of the heat exchanger, the preheating bin, the tee joint and other structures, the purposes of fully utilizing waste heat and accurately adjusting waste heat gas flow and pressure are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste heat recovery technical field, especially in a kind of waste heat recovery intelligent control system. BACKGROUND

[0002] At present, in waste heat recovery system, many existing systems only focus on heat exchange this basic link, for the further exploitation and utilization of waste heat lack effective means, leading to a large amount of available waste heat is wasted.This not only reduces the comprehensive utilization rate of energy, also increases operating cost. INVENTION CONTENTS

[0003] The technical problem to be solved by the utility model is to provide a waste heat recovery intelligent control system to solve the technical problem that existing waste heat recovery system waste heat utilization is insufficient.

[0004] Technical scheme: to achieve the above object, the utility model is realized by the following technical scheme: a waste heat recovery intelligent control system, comprising: heat exchanger and preheating bin, preheating bin is set to the cold medium lead-in pipe periphery of heat exchanger, preheating bin is used to preheat the medium in cold medium lead-in pipe;Three-way, two gas outlets of three-way are connected with the hot medium inlet of heat exchanger and the gas inlet of preheating bin respectively, three-way is used to guide waste heat gas into heat exchanger and preheating bin, wherein heat exchanger usually adopts column tube type or plate type structure, can efficiently realize heat exchange.Preheating bin uses heat conduction principle, so that cold medium lead-in pipe and waste heat are fully contacted, so as to improve the initial temperature of cold medium;The connection mode of three-way adopts welding or flange connection, ensures that connection is firm and has no leakage, and metal material consistent with pipeline is selected, to ensure the durability of the whole.

[0005] In a further embodiment, gas storage bin, its gas outlet is connected with the gas inlet of three-way, and the gas storage bin is used to store waste heat gas, wherein the pressure bearing range of the gas storage bin needs to be designed according to the maximum pressure of waste heat gas in the system, and has a certain pressure margin, and the inner wall needs to be treated for corrosion.

[0006] In a further embodiment, gas sending part, its gas outlet is connected with the gas inlet of gas storage bin, and the gas sending part is used to guide waste heat gas into the gas storage bin, and the gas sending rate of the gas sending part is constant, wherein the installation position of the gas sending part needs to be close to the waste heat source, to reduce the gas conveying distance and heat loss.The pipe diameter of gas sending pipeline is accurately calculated and determined according to the gas sending rate and gas pressure;In addition to common piston type and screw type compressor, centrifugal compressor can also be selected, and appropriate type is selected according to actual working condition;Flowmeter and pressure sensor can be installed on gas sending pipeline, to facilitate real-time monitoring of gas sending state, its gas outlet is connected with the gas inlet of gas storage bin, and waste heat gas is guided into the gas storage bin, and the gas sending rate is constant.

[0007] In a further embodiment, two switching units are provided, and the two switching units are connected to the preheating bin and the three-way pipe and the heat exchanger and the three-way pipe respectively, and the switching units are used to control the rate of the residual heat gas introduced into the heat exchanger and the preheating bin, wherein the adjustment range of the switching units needs to cover the gas flow demand of various working conditions that the system may appear, and the response time needs to meet the real-time adjustment requirements of the system.

[0008] In a further embodiment, a one-way control valve is connected to the connecting pipeline of the three-way pipe and the preheating bin, and the one-way control valve is between the switching unit and the three-way pipe, and the one-way control valve is used to control the opening and closing of the connecting pipeline of the three-way pipe and the preheating bin, wherein the one-way control valve usually adopts electromagnetic or mechanical type, the electromagnetic type has fast response speed, and the mechanical type has high reliability; the opening and closing pressure threshold of the one-way control valve needs to be accurately set according to the design pressure and safety requirements of the system.

[0009] In a further embodiment, a pressure monitor is installed on the gas storage bin, and the pressure monitor is used to monitor the gas pressure inside the gas storage bin to control the opening and closing of the one-way control valve, wherein the accuracy of the pressure monitor needs to meet the accuracy requirements of the system for pressure control.

[0010] In a further embodiment, a switching block is rotatably arranged in the rotating unit; a plurality of gas channels are provided, and the diameters of the plurality of gas channels gradually decrease; the switching block is used to control the communication between the gas channels with different diameters and the gas inlet end and the gas outlet end on the switching unit, wherein the switching block is rotated by a motor or manually operated, the gas channels with different diameters can be switched according to the gas flow demand, and the switching block is arranged in the switching unit; the rotation angle and positioning accuracy of the switching block need to meet the requirements of accurate switching of different gas channels, and a sealing structure can be arranged outside the switching block to prevent gas leakage; the inner wall of the gas channel needs to be smooth to reduce the friction resistance of the gas flow.

[0011] In a further embodiment, the maximum diameter of the gas channel is the same as the diameter of the gas inlet end of the switching unit.

[0012] Beneficial effects: 1. Through the cooperation of the heat exchanger, the preheating bin, the three-way pipe and other structures, the purpose of fully utilizing the residual heat and accurately adjusting the residual heat gas flow and pressure is achieved; the gas sending unit stably sends the residual heat gas into the gas storage bin, the gas storage bin stores the gas and accurately controls the gas to enter the heat exchanger and the preheating bin through the three-way pipe and the switching unit, the heat exchanger realizes heat exchange, the preheating bin preheats the medium in the cold medium introduction pipe by heat conduction, the pressure monitor cooperates with the one-way control valve to ensure pressure safety and realize secondary utilization of residual heat, and the switching block flexibly adjusts the flow by switching different diameter gas channels. Finally, the residual heat utilization rate is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0014] Figure 1 It is a structural schematic diagram of the present application.

[0015] Figure 2 It is a structural schematic diagram of the conversion part.

[0016] Figure 3 It is a structural schematic diagram of the conversion part. Figure 2 It is a sectional view structural schematic diagram.

[0017] The reference numerals in the drawings are as follows: 1, air feeding part; 2, gas storage chamber; 3, pressure monitor; 4, tee joint; 5, one-way control valve; 6, conversion part; 7, heat exchanger; 8, preheating chamber; 9, conversion block; 901, air passage. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions in the present application are described clearly and completely. Obviously, the described embodiments are some embodiments of the present application, but not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0019] The present application provides a waste heat recovery intelligent control system, which solves the technical problem of insufficient waste heat utilization of the existing waste heat recovery system. In actual use, the purpose of improving waste heat utilization rate is achieved.

[0020] In order to better understand the above technical solutions, the above technical solutions will be described in detail in combination with the drawings in the specification and specific embodiments.

[0021] Referring to Figures 1-3 A waste heat recovery intelligent control system, comprising: a heat exchanger 7 and a preheating chamber 8, the preheating chamber 8 is arranged on the periphery of the cold medium inlet pipe of the heat exchanger 7, and the preheating chamber 8 is used for preheating the medium in the cold medium inlet pipe; a tee joint 4, two gas outlet ends of the tee joint 4 are respectively connected with the hot medium inlet of the heat exchanger 7 and the gas inlet end of the preheating chamber 8, and the tee joint 4 is used for guiding the waste heat gas into the heat exchanger 7 and the preheating chamber 8.

[0022] The layout of the heat exchanger 7 and the preheating bin 8, and the connection design of the three-way pipe 4, realize accurate distribution of the waste heat gas to the heat exchanger 7 and the preheating bin 8, and the preheating bin 8 effectively utilizes the waste heat to preheat the medium in the cold medium guide pipe, strengthens the initial condition of heat exchange, greatly improves the heat exchange efficiency and the waste heat utilization rate.

[0023] The gas storage bin 2 is connected with the gas inlet end of the three-way pipe 4, and is used for storing waste heat gas.

[0024] The connection of the gas storage bin 2 and the three-way pipe 4 realizes stable storage of waste heat gas, and continuously supplies waste heat gas to the heat exchanger 7 and the preheating bin 8, guarantees the system operation stability, and avoids the influence of waste heat gas supply fluctuation on the waste heat recovery effect.

[0025] The gas sending part 1 is connected with the gas inlet end of the gas storage bin 2, and is used for guiding waste heat gas into the gas storage bin 2, and the gas sending rate of the gas sending part 1 is constant.

[0026] The connection of the gas sending part 1 and the gas storage bin 2 and the constant gas sending rate setting realize stable transportation of waste heat gas to the gas storage bin 2, maintain the stable gas pressure in the gas storage bin 2, provide a stable gas source for the subsequent waste heat utilization link, and reduce the system failure caused by unstable gas sending.

[0027] The conversion part 6 is provided with two, and the two conversion parts 6 are respectively connected between the preheating bin 8 and the three-way pipe 4 and the heat exchanger 7 and the three-way pipe 4, and the conversion part 6 is used for controlling the waste heat gas rate of the waste heat gas guided into the heat exchanger 7 and the preheating bin 8.

[0028] The two conversion parts 6 are respectively connected at key positions, realize flexible and accurate control of the rate of the waste heat gas entering the heat exchanger 7 and the preheating bin 8, so that the system can adjust the waste heat distribution according to the actual demand, adapt to the waste heat recovery demand under different working conditions, and improve the overall adaptability of the system.

[0029] The one-way control valve 5 is connected on the connecting pipeline of the three-way pipe 4 and the preheating bin 8, and is located between the conversion part 6 and the three-way pipe 4, and is used for controlling the opening and closing of the connecting pipeline of the three-way pipe 4 and the preheating bin 8.

[0030] The one-way control valve 5 is connected on the specific pipeline, realizes accurate control of the opening and closing of the connecting pipeline of the three-way pipe 4 and the preheating bin 8 according to the system demand, cooperates with the system pressure regulation, guarantees the system pressure stability, prevents the pressure abnormity from causing damage to the equipment, and simultaneously reasonably guides the waste heat gas to the preheating bin 8, realizes the effect of waste heat secondary utilization.

[0031] A pressure monitor 3 is installed on the gas storage cabin 2, which is used to monitor the gas pressure inside the gas storage cabin 2 to control the opening and closing of the one-way control valve 5.

[0032] The pressure monitor 3 is installed on the gas storage cabin 2 to realize real-time and accurate monitoring of the gas pressure inside the gas storage cabin 2, and to automatically control the opening and closing of the one-way control valve 5 according to the pressure change, thereby ensuring the pressure safety of the gas storage cabin 2 and the entire system, avoiding the risk of overpressure, and ensuring the stable and safe operation of the system.

[0033] The conversion block 9 is rotatably arranged in the rotating part; a plurality of gas channels 901 are arranged, and the diameters of the plurality of gas channels 901 gradually decrease; and the conversion block 9 is used to control the communication between the gas channels 901 with different diameters and the gas inlet end and the gas outlet end on the conversion part 6.

[0034] The rotation design of the conversion block 9 in the conversion part 6 and the layout of the gas channels 901 realize the flexible adjustment of the gas flow in the conversion part 6 by switching the gas channels 901 with different diameters, meet the diversified demand of the system for the gas flow under different working conditions, and improve the degree of refinement of the system operation.

[0035] The maximum diameter of the gas channel 901 is the same as the diameter of the gas inlet end of the conversion part 6.

[0036] The design that the maximum diameter of the gas channel 901 is the same as the diameter of the gas inlet end of the conversion part 6 realizes that the gas can smoothly pass through the conversion part 6 when the maximum flow demand is required, avoids the generation of excessive pressure loss due to the limitation of the pipe diameter, and ensures that the system can still maintain high-efficiency operation when it is under high-load operation.

[0037] In use, the gas feeding part 1 introduces the waste heat gas into the gas storage bin 2 at a constant gas feeding rate, and the gas storage bin 2 stores the waste heat gas to provide a stable gas source for subsequent links. The waste heat gas in the gas storage bin 2 is respectively conveyed to the heat exchanger 7 and the preheating bin 8 through the three-way pipe 4, and the preheating bin 8 is arranged at the periphery of the cold medium inlet pipe of the heat exchanger 7, and the waste heat is used to preheat the medium in the pipe to improve the heat exchange efficiency. Two conversion parts 6 are respectively arranged between the preheating bin 8 and the three-way pipe 4 and between the heat exchanger 7 and the three-way pipe 4, and the waste heat gas rate entering the two is accurately controlled to adapt to different working conditions. The pressure monitor 3 arranged on the gas storage bin 2 monitors the gas pressure in the bin in real time, and when the pressure is too large, the one-way control valve 5 arranged in the pipeline connecting the three-way pipe 4 and the preheating bin 8 and between the conversion part 6 and the three-way pipe 4 is opened, so that the excess waste heat gas flows into the preheating bin 8, the system pressure is stabilized, and the waste heat is recycled. The conversion block 9 in the conversion part 6 can rotate, and a plurality of gas channels 901 with gradually decreasing diameters are arranged on the conversion block 9. By switching the communication between the gas channels 901 with different diameters and the gas inlet end and the gas outlet end of the conversion part 6, the gas flow is flexibly adjusted to meet the diversified needs of the system, and the maximum diameter of the gas channel 901 is the same as the diameter of the gas inlet end of the conversion part 6, so that the gas flows smoothly at the maximum flow demand, and the system runs efficiently.

[0038] The figure expressed in the drawing is an example figure, and the purpose is only to more intuitively show the key structure and connection relationship of the waste heat recovery intelligent control system; in actual application, the appearance and size of the device can be adjusted and optimized according to specific needs.

[0039] The utility model covers any alternative, modification, equivalent method and scheme made on the essence and range of the utility model. In order to make the public have thorough understanding of the utility model, the specific details are explained in the above preferred embodiment of the utility model, and the utility model can also be completely understood without the description of these details for the person skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the utility model, the well-known methods, processes, procedures, elements and circuits are not described in detail.

[0040] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled personnel in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements should also be regarded as the protection range of the utility model.

Claims

1. A waste heat recovery intelligent control system, comprising a heat exchanger (7) and a preheating bin (8), characterized in that: The preheating bin (8) is arranged at the periphery of the cold medium inlet pipe of the heat exchanger (7), and is used for preheating the medium in the cold medium inlet pipe; The tee (4) has two gas outlet ends, which are respectively connected with the hot medium inlet of the heat exchanger (7) and the gas inlet end of the preheating bin (8), and is used for guiding the waste heat gas into the heat exchanger (7) and the preheating bin (8).

2. The intelligent control system for waste heat recovery according to claim 1, wherein, Further comprising: The gas storage bin (2) has a gas outlet end connected with the gas inlet end of the tee (4), and is used for storing the waste heat gas.

3. The waste heat recovery intelligent control system according to claim 2, characterized in that, Further comprising: The gas feeding part (1) has a gas outlet end connected with the gas inlet end of the gas storage bin (2), and is used for guiding the waste heat gas into the gas storage bin (2), and the gas feeding rate of the gas feeding part (1) is constant.

4. The waste heat recovery intelligent control system according to claim 2, characterized in that, Further comprising: The conversion part (6) is provided with two, and the two conversion parts (6) are respectively connected between the preheating bin (8) and the tee (4) and the heat exchanger (7) and the tee (4), and are used for controlling the waste heat gas rate of the waste heat gas guided into the heat exchanger (7) and the preheating bin (8).

5. The waste heat recovery intelligent control system according to claim 4, characterized in that, Further comprising: The one-way control valve (5) is connected on the connecting pipeline of the tee (4) and the preheating bin (8), and is between the conversion part (6) and the tee (4), and is used for controlling the opening and closing of the connecting pipeline of the tee (4) and the preheating bin (8).

6. The waste heat recovery intelligent control system according to claim 5, characterized in that, Further comprising: The pressure monitor (3) is installed on the gas storage bin (2), and is used for monitoring the gas pressure inside the gas storage bin (2) to control the opening and closing of the one-way control valve (5).

7. The waste heat recovery intelligent control system according to claim 4, characterized in that, Further comprising: The conversion block (9) is rotatably arranged in the rotating part; The gas channel (901) is provided with a plurality of gas channels (901), and the diameters of the plurality of gas channels (901) gradually decrease; The conversion block (9) is used for controlling the communication between the gas channels (901) with different diameters and the gas inlet end and the gas outlet end on the conversion part (6).

8. The waste heat recovery intelligent control system according to claim 7, characterized in that: The maximum diameter of the gas channel (901) is the same as the diameter of the gas inlet end of the conversion part (6).

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