Intermittent waste heat resource comprehensive utilization system

Abstract

The utility model relates to the technical field of energy comprehensive utilization, in particular to a discontinuous waste heat resource comprehensive utilization system which comprises a discontinuous waste heat resource conveying pipeline, the tail end of the conveying pipeline is divided into two branches, one branch is provided with a vacuum breaking device, and the other branch is an energy storage tank input pipeline. An electric valve is arranged on the energy storage tank input pipeline, and the energy storage tank input pipeline extends into the bottom end of the interior of the energy storage tank; a temperature detection device for detecting the temperature of liquid in the energy storage tank is arranged on the energy storage tank; the temperature detection device and the electric valve are respectively connected with a temperature regulation control device; the bottom of the energy storage tank is sequentially connected with a pump and an energy consumption point through an energy storage tank output pipeline, an energy consumption point conveying pipeline connected to the energy consumption point is connected with the top of the energy storage tank, and the top of the energy storage tank is further connected with an overflow pipe. Through connection of the temperature adjusting control device, the temperature detection device and the electric valve, the temperature of the liquid in the energy storage tank is controlled within a certain range, and relatively stable effective utilization of the waste heat liquid is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of comprehensive utilization of energy, and particularly relates to a comprehensive utilization system for intermittent waste heat resources. Background Art

[0002] The fine chemical industry is the high-end part of the traditional chemical industry. Compared with the traditional chemical industry, the fine chemical industry pays more attention to the quality and purity of products, as well as the use performance of products, and the production control is more stringent. In the production of fine chemicals, intermittent production is one of its main characteristics. The production process of intermittent production is simple, the reaction conditions such as temperature, time, and pressure are easy to control, the input cost is low, the flexibility is large, and enterprises are easy to obtain higher economic benefits. However, this leads to intermittent discharge of intermittent waste heat resources (waste heat liquid) such as steam condensate and high-temperature hot water with high temperature and large heat content. Due to the discontinuity of intermittent waste heat resources, it is difficult to utilize, and generally it is directly discharged into the sewage treatment device after being cooled by natural cooling in the open air or other methods, resulting in huge waste of energy.

[0003] In production and life, a stable heat source supply is crucial. The stable supply of energy such as heating, electricity, and natural gas can ensure the stable operation of the industrial chain and meet the energy consumption needs of various industries and individual users. For example, winter heating, preheaters in production devices, etc. all require a heat source with relatively stable temperature for heating. Because a large amount of stable heat source is needed, winter heating or preheater preheating has always been carried out by means of steam heat exchange, and it requires a large amount of additional manpower and material resources to achieve such a direct and stable energy supply of steam heat exchange. Summary of the Utility Model

[0004] Aiming at the technical problem that intermittent waste heat resources are difficult to provide a stable heat source supply and there is a waste situation, the utility model provides a comprehensive utilization system for intermittent waste heat resources. The system is simple to operate, has low investment, quick results, can realize centralized control in the central control room, and improves work efficiency and heat energy utilization rate.

[0005] The utility model provides a comprehensive utilization system for intermittent waste heat resources, including a conveying pipeline for intermittent waste heat resources. Two branches are separated at the end of the conveying pipeline. A vacuum-breaking device is arranged on one branch, and the end of the branch is connected to an external discharge pool. The other branch is an input pipeline for a storage tank. An electric valve is arranged on the input pipeline for the storage tank, and the input pipeline for the storage tank extends to the bottom end inside the storage tank.

[0006] A temperature detection device for detecting the liquid temperature in the storage tank is arranged on the storage tank. The temperature detection device and the electric valve are respectively connected to a temperature adjustment control device.

[0007] The bottom of the energy storage tank is connected to a pump and an energy consumption point in sequence through an energy storage tank output pipeline. The energy consumption point delivery pipeline connected to the energy consumption point is connected to the top of the energy storage tank. An overflow pipe is also connected to the top of the energy storage tank, and the other end of the overflow pipe is connected to an external discharge tank.

[0008] The vacuum-breaking device refers to a device that can break the vacuum caused by condensation, which is obtained by modifying the pipeline of the branch or purchased commercially and then installed on the branch.

[0009] Furthermore, the temperature detection device is signal-connected to the temperature regulation and control device.

[0010] Furthermore, the electric valve is control-connected to the temperature regulation and control device.

[0011] Furthermore, the electric valve is an electric ball valve, an electric butterfly valve or an electric gate valve.

[0012] Furthermore, the pump includes at least one circulation pump.

[0013] Furthermore, the pump includes a circulation pump and a standby pump connected in parallel.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The present utility model provides an intermittent waste heat resource comprehensive utilization system. Through the cooperation of various devices, especially the comprehensive deployment of the temperature regulation and control device, the temperature detection device and the electric valve, the liquid temperature in the energy storage tank can be controlled within a certain range, so that the waste heat liquid at a certain temperature continuously supplies heat to the energy consumption point. Except for the control and maintenance of the pump, after the upper and lower limits of the temperature of the temperature regulation and control device are set, the intermittent waste heat resource comprehensive utilization system can operate automatically, liberating the labor force, improving the production efficiency, and achieving the purpose of comprehensive utilization of intermittent waste heat resources and energy conservation and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of an intermittent waste heat resource comprehensive utilization system of the present utility model.

[0018] In the figure, 1 - external discharge tank, 2 - temperature regulation and control device, 3 - temperature detection device, 4 - electric valve, 5 - vacuum-breaking device, 6 - energy storage tank, 7 - circulation pump, 8 - standby pump, 9 - energy consumption point, 10 - overflow pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0020] Embodiment 1

[0021] Refer to Figure 1 , an intermittent waste heat resource comprehensive utilization system, including a conveying pipeline for intermittent waste heat resources. Two branches are separated at the end of the conveying pipeline. A vacuum breaking device 5 is arranged on one branch, and the end of the branch is connected to an external discharge pool 1. The other branch is an energy storage tank input pipeline. An electric valve 4 is arranged on the energy storage tank input pipeline. The electric valve 4 is an electric ball valve. The energy storage tank input pipeline extends to the bottom end inside the energy storage tank 6;

[0022] A temperature detection device 3 for detecting the liquid temperature in the energy storage tank 6 is arranged on the energy storage tank 6. The temperature detection device 3 is signal-connected to a temperature regulation and control device 2, and the electric valve 4 is control-connected to the temperature regulation and control device 2;

[0023] The bottom of the energy storage tank 6 is sequentially connected to a pump and an energy consumption point 9 through an energy storage tank output pipeline. The pump includes a circulating pump 7 and a standby pump 8 connected in parallel. The energy consumption point conveying pipeline connected to the energy consumption point 9 is connected to the top of the energy storage tank 6. An overflow pipe 10 is also connected to the top of the energy storage tank 6, and the other end of the overflow pipe 10 is connected to the external discharge pool 1.

[0024] Taking the comprehensive utilization of waste heat liquid as an example, before the operation of the intermittent waste heat resource comprehensive utilization system in this embodiment, the upper and lower limits of the liquid temperature in the energy storage tank 6 monitored by the temperature adjustment control device 2 are set first. During operation, the electric valve 4 is initially in an open state, and the conveying pipeline transports the waste heat liquid to the energy storage tank 6 through the energy storage tank input pipeline (due to the inability to overcome the elevation resistance, the waste heat liquid cannot flow into the external discharge tank 1 through the branch with the vacuum breaking device 5). The temperature detection device 3 detects the temperature value of the liquid in the energy storage tank 6 and feeds it back to the temperature adjustment control device 2. In actual production, due to the intermittency of the waste heat liquid supply, the temperature of each section of waste heat liquid is uncertain, but the temperature of the waste heat liquid is usually higher than the lower limit of the set value of the temperature adjustment control device 2. If the temperature value is within the set temperature range, the electric valve 4 remains open, and the waste heat liquid can continuously (here, continuously means that the energy storage tank input pipeline remains unobstructed, and the waste heat liquid generated upstream can pass through the energy storage tank input pipeline without hindrance) enter the energy storage tank 6. After the waste heat liquid in the energy storage tank 6 reaches a certain liquid level, the circulation pump 7 is turned on to send the waste heat liquid to the energy consumption point 9. After the waste heat liquid releases heat energy at the energy consumption point 9 and becomes low-temperature waste heat liquid, it is sent back to the energy storage tank 6 through the energy consumption point conveying pipeline, completing a cycle of waste heat liquid utilization.

[0025] As the electric valve 4 remains open, the internal liquid level of the energy storage tank 6 continuously rises. When it rises to the overflow pipe 10, the excess waste heat liquid is discharged into the external discharge tank 1 through the overflow pipe 10. Particularly, after completing a cycle of waste heat liquid utilization, the energy storage tank input pipeline extends to the bottom of the interior of the energy storage tank 6. The newly entered waste heat liquid accumulates at the bottom of the energy storage tank 6, and the energy consumption point conveying pipeline is connected to the top of the energy storage tank 6. After the low-temperature waste heat liquid enters the energy storage tank 6, it accumulates at the top. Without being fully mixed with the waste heat liquid at the bottom, the low-temperature waste heat liquid will be preferentially discharged from the overflow pipe 10 due to the rising liquid level, ensuring that the heat energy of the waste heat liquid entering the energy storage tank 6 from the energy storage tank input pipeline can be utilized.

[0026] With the continuous operation of the intermittent waste heat resource comprehensive utilization system, there is a situation where the heat consumption at the energy consumption point 9 is lower than the heat supply of the waste heat liquid in the energy storage tank 6. That is, the temperature at the energy consumption point 9 continuously rises and the heat consumption gradually decreases; or there is a situation where the temperature of the waste heat liquid input into the energy storage tank 6 from the energy storage tank input pipeline is higher than the upper temperature limit set by the temperature regulation and control device 2. At this time, if the liquid level in the energy storage tank 6 rises to the overflow pipe 10, it will be directly discharged into the external discharge pool 1. If the liquid level in the energy storage tank 6 has not risen to the overflow pipe 10, the temperature detection device 3 will feedback the detected signal to the temperature regulation and control device 2, and the temperature regulation and control device 2 will issue a control instruction to close the valve to the electric valve 4. The waste heat liquid in the conveying pipeline will no longer flow into the energy storage tank 6 through the energy storage tank input pipeline, but will directly enter the external discharge pool 1 through the branch circuit, overcoming the height difference of the vacuum breaking device 5. The circulation pump 7 maintains its operating state to ensure that the waste heat liquid in the energy storage tank 6 continuously supplies heat to the energy consumption point 9.

[0027] With the continuous consumption of heat energy at the energy consumption point 9, the temperature of the liquid in the energy storage tank 6 will gradually decrease. When the temperature detection device 3 detects that its temperature value is lower than or equal to the lower limit set by the temperature regulation and control device 2, the temperature regulation and control device 2 will issue a control instruction to open the valve to the electric valve, and the waste heat liquid will re-enter the bottom of the energy storage tank 6.

[0028] In addition, the only vulnerable part of the intermittent waste heat resource comprehensive utilization system is the pump. When the circulation pump 7 is under maintenance, the standby pump 8 connected in parallel with it is turned on to maintain the normal use state of the intermittent waste heat resource comprehensive utilization system and continuously provide stable heat energy to the energy consumption point 9.

[0029] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and all such modifications or substitutions should be within the scope of the present invention. / Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention.

Claims

1. A system for comprehensive utilization of intermittent waste heat resources, comprising a pipeline for transporting intermittent waste heat resources, characterized in that: Two branches are formed at the end of the conveying pipeline, one branch is provided with a vacuum breaking device (5), the end of the branch is connected to the external discharge pool (1), and the other branch is an energy storage tank input pipeline, an electric valve (4) is provided on the energy storage tank input pipeline, and the energy storage tank input pipeline extends to the bottom of the interior of the energy storage tank (6); The energy storage tank (6) is provided with a temperature detection device (3) for detecting the temperature of the liquid in the energy storage tank (6), and the temperature detection device (3) and the electric valve (4) are respectively connected to the temperature adjustment control device (2); The bottom of the energy storage tank (6) is connected to a pump and an energy consumption point (9) in sequence through an energy storage tank output pipeline. The energy consumption point delivery pipeline connected to the energy consumption point (9) is connected to the top of the energy storage tank (6). The top of the energy storage tank (6) is also connected to an overflow pipe (10). The other end of the overflow pipe (10) is connected to an external discharge pool (1).

2. The intermittent waste heat resource comprehensive utilization system according to claim 1, characterized in that: The temperature detection device (3) is connected to the temperature adjustment control device (2) via a signal.

3. The intermittent waste heat resource comprehensive utilization system according to claim 1, characterized in that: The electric valve (4) is control-connected to the temperature adjustment control device (2).

4. The intermittent waste heat resource comprehensive utilization system according to claim 1, characterized in that: The electric valve (4) is an electric ball valve, an electric butterfly valve or an electric gate valve.

5. The intermittent waste heat resource comprehensive utilization system according to claim 1, characterized in that: The pump comprises at least one circulation pump (7).

6. The intermittent waste heat resource comprehensive utilization system according to claim 5, characterized in that: The pump comprises a circulation pump (7) and a standby pump (8) connected in parallel.

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