A biogas torch waste heat utilization system

Abstract

The application discloses a biogas torch waste heat utilization system, which is applied to the field of garbage incineration energy utilization, and comprises a water tank, a water pump, a biogas torch and a heat exchanger. The water tank is connected to a user end through the water pump, the biogas torch and the heat exchanger in sequence. The water tank delivers cold water to the water pump through a pipeline, the water pump pressurizes and delivers the cold water to the biogas torch, the biogas torch heats the cold water and outputs hot water to the heat exchanger, and the heat exchanger adjusts the temperature of the hot water according to a target temperature and then outputs water at the target temperature to the user end. As can be seen, the heat energy released by the biogas combustion of the biogas torch is fully used to heat the cold water, energy waste is avoided, and the cold water can cool down the auxiliary equipment of the biogas torch when passing through the biogas torch, thereby reducing the thermal damage of the auxiliary equipment.

Description

Technical Field

[0001] This application relates to the field of energy utilization from waste incineration, and more specifically, to a biogas flare waste heat utilization system. Background Technology

[0002] During the operation of a municipal solid waste incineration power plant, leachate is generated from the accumulation and compression of waste in the waste storage area. This leachate needs to be transported to an anaerobic digester, where it is fermented by anaerobic bacteria to produce biogas, primarily composed of methane. To avoid the safety risks posed by biogas leaks, the generated biogas is usually piped to a boiler for auxiliary combustion or directly burned using a biogas flare, thus ensuring the safe disposal of biogas.

[0003] In the above-mentioned biogas treatment methods, after the biogas is ignited and burned by a biogas flare, the flue gas and heat generated by the combustion are directly discharged into the atmosphere without any utilization process. This is a relatively typical biogas treatment method in current municipal solid waste incineration power plants.

[0004] However, a large amount of heat energy released from biogas combustion is not recovered and utilized, resulting in energy waste and low economic benefits for enterprises. The high temperature heat generated by combustion can easily cause thermal damage to the auxiliary equipment of biogas flares and accelerate equipment aging. Utility Model Content

[0005] In view of the above problems, this application provides a biogas flare waste heat utilization system to make full use of thermal energy and reduce thermal damage to biogas flare auxiliary equipment.

[0006] To achieve the above objectives, the following specific solutions are proposed:

[0007] A biogas flare waste heat utilization system includes a water tank, a water pump, a biogas flare, and a heat exchanger;

[0008] The water tank is connected to the user end in sequence through the water pump, the biogas flare and the heat exchanger;

[0009] The water tank delivers cold water to the water pump via a pipeline. The water pump pressurizes the cold water and delivers it to the biogas flare. The biogas flare heats the cold water and outputs hot water to the heat exchanger. The heat exchanger adjusts the temperature of the hot water according to the target temperature and outputs water at the target temperature to the user.

[0010] Optionally, the water tank is directly connected to the heat exchanger to supply cold water to the heat exchanger.

[0011] Optionally, the water inlet of the biogas flare is at a higher level than the water outlet of the biogas flare.

[0012] Optionally, the biogas flare waste heat utilization system also includes a water supply interface, which is used to replenish water to the water tank to a qualified water level.

[0013] Optionally, the biogas flare waste heat utilization system also includes an overflow outlet.

[0014] Using the above technical solution, in the biogas flare waste heat utilization system of this application, the water tank is connected to the user end sequentially via a water pump, a biogas flare, and a heat exchanger. The water tank transports cold water to the water pump through pipes, the water pump pressurizes the cold water and delivers it to the biogas flare, the biogas flare heats the cold water and outputs hot water to the heat exchanger, and the heat exchanger adjusts the temperature of the hot water according to the target temperature before outputting water at the target temperature to the user end. Therefore, the heat energy released by the combustion of biogas in the biogas flare is fully utilized to heat the cold water, avoiding energy waste. Furthermore, the cold water passing through the biogas flare can cool the auxiliary equipment of the biogas flare, reducing heat damage to the auxiliary equipment. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0016] Figure 1 This is a system architecture diagram for realizing the utilization of waste heat from a biogas flare, provided in an embodiment of this application. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Figure 1 An optional system architecture for utilizing waste heat from biogas flares, as provided in the embodiments of this application, is as follows: Figure 1 As shown, the system architecture may include a water tank 1, a water pump 2, a biogas flare 3, and a heat exchanger 4.

[0019] Understandably, water tank 1 is used to store ambient / cold water. The motor of water pump 2 drives an internal impeller to rotate. The impeller's rotation generates centrifugal force, drawing water from water tank 1 into the pump chamber. This centrifugal force then applies pressure to the water, delivering it to the biogas flare 3, allowing for thorough heat exchange between the water and the heat generated by combustion in the biogas flare 3. The biogas flare 3 is a combustion device for the safe processing of biogas (mainly methane). It can be applied in biogas-producing locations such as landfills, sewage treatment plants, and livestock farms. Based on the combustion method, the equipment can be classified as a flame flare or a flameless flare. The heat exchanger 4 can contain hot water on the hot side and ambient / cold water on the cold side. The cooling source for the cold side medium can be cold water from the water tank 1. When the hot water on the hot side enters the heat exchanger 4, the heat of the hot water on the hot side is transferred to the ambient / cold water on the cold side through the heat exchange surface (such as the tube wall, plates, etc.) of the heat exchanger, and its own temperature gradually decreases. The ambient / cold water on the cold side absorbs heat and its temperature rises slightly. Finally, it will mix with the cooled hot water on the hot side to form warm water with a temperature that meets the user's needs.

[0020] Specifically, water tank 1 is connected to the user end via water pump 2, biogas flare 3 and heat exchanger 4 in sequence.

[0021] More specifically, water tank 1 delivers cold water to water pump 2 through pipes, water pump 2 pressurizes the cold water and delivers it to biogas flare 3, biogas flare 3 heats the cold water and outputs hot water to heat exchanger 4, heat exchanger 4 adjusts the temperature of the hot water according to the target temperature and outputs water at the target temperature to the user.

[0022] A valve may be installed on the side of the pipe connecting water tank 1 to water pump 2 near water tank 1. This valve is used to control whether cold water from water tank 1 flows to water pump 2, and to control the flow rate of cold water from water tank 1 to water pump 2.

[0023] A valve may be installed on the side of the pipe connecting water pump 2 to biogas flare 3 near water pump 2. This valve is used to control whether cold water from water pump 2 flows to biogas flare 3, and to control the flow rate of cold water from water pump 2 to biogas flare 3.

[0024] A valve may be installed on the side of the pipe connecting the biogas flare 3 to the heat exchanger 4 near the biogas flare 3. This valve is used to control whether hot water from the biogas flare 3 flows to the heat exchanger 4, and to control the flow rate of hot water from the biogas flare 3 to the heat exchanger 4.

[0025] A valve may be installed on the side of the pipe connecting heat exchanger 4 to the user end, near heat exchanger 4. This valve is used to control whether the warm water from heat exchanger 4 flows to the user end, and to control the flow rate of the warm water from heat exchanger 4 to the user end.

[0026] It should be noted that the terms cold water, hot water, and warm water mentioned in this application are all relative concepts, with cold water temperature being lower than warm water temperature being lower than hot water temperature.

[0027] Furthermore, water tank 1 can also be directly connected to a heat exchanger to supply cold water to the heat exchanger.

[0028] Among them, the pipe that connects directly from water tank 1 to heat exchanger can be equipped with a valve on the side near water tank 1. The valve is used to control whether the cold water in water tank 1 flows to the heat exchanger and to control the flow rate of the cold water in water tank 1 to the heat exchanger.

[0029] Furthermore, the water inlet of the biogas flare 3 is at a higher level than the water outlet of the biogas flare 3.

[0030] Understandably, adopting a high-inlet, low-outlet arrangement extends the residence time of water inside the biogas flare 3, allowing the water to flow fully through the high-temperature zone generated by the flare combustion. This prevents the water from rapidly passing through the flare due to gravity or pressure, ensuring more thorough heat exchange with the high-temperature environment, maintaining stable water flow, and reducing equipment dependence. The gravity-assisted flow of water from high to low helps the water pump 2 pressurize and form a more stable flow, reducing problems such as flow interruptions and uneven flow rates caused by pressure fluctuations in the water pump 2. This lowers the pressure output requirements of the water pump and indirectly reduces the load on the water pump 2.

[0031] Furthermore, the biogas flare waste heat utilization system may also include a water supply interface for replenishing water to the water tank 1 to the qualified water level.

[0032] Specifically, water tank 1 can be marked with a horizontal line indicating the qualified water level. When water tank 1 does not reach the qualified water level, water can be continuously added to water tank 1 through the water replenishment interface until the qualified water level is reached.

[0033] Understandably, continuously replenishing water to water tank 1 through the water supply interface can prevent water pump 2 from running dry when the water level in water tank 1 is too low, thus preventing water pump 2 from being damaged due to lack of water. It can also maintain a stable water supply, ensuring that water pump 2 can continuously deliver sufficient water to biogas flare 3, ensuring that the water in biogas flare 3 can fully contact the high temperature and absorb heat, and avoiding the impact of insufficient water on the waste heat absorption efficiency.

[0034] Furthermore, the biogas flare waste heat utilization system may also include an overflow outlet.

[0035] Understandably, the overflow port can prevent water tank 1 from overflowing due to excessive water level. When the water supply port adds too much water or the water flow in the system backflows, causing the water level in the tank to exceed the qualified level, the overflow port can discharge the excess water in time to prevent water from overflowing and damaging the equipment around the water tank, such as the water pump motor. Moreover, it can maintain the stability of the water level in water tank 1. By limiting the maximum water level through the overflow port, it can ensure that the water pump can always draw a sufficient and stable amount of water from the water tank and deliver it to the biogas flare, avoiding uneven water pumping due to water level fluctuations and ensuring sufficient heat exchange between the water and the combustion heat of the biogas flare 3.

[0036] The biogas flare waste heat utilization system provided in this embodiment includes a water tank, a water pump, a biogas flare, and a heat exchanger. The water tank is connected to the user end via the water pump, biogas flare, and heat exchanger. Cold water is transported from the water tank to the water pump through a pipeline. The water pump pressurizes the cold water and delivers it to the biogas flare. The biogas flare heats the cold water and outputs hot water to the heat exchanger. The heat exchanger adjusts the temperature of the hot water according to a target temperature and then outputs water at the target temperature to the user end. Therefore, the heat energy released by the combustion of biogas in the biogas flare is fully utilized to heat the cold water, avoiding energy waste. Furthermore, the cold water passing through the biogas flare cools the auxiliary equipment of the biogas flare, reducing heat damage to the auxiliary equipment.

[0037] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A biogas flare waste heat utilization system, characterized in that, Includes water tank, water pump, biogas flare, and heat exchanger; The water tank is connected to the user end in sequence through the water pump, the biogas flare and the heat exchanger; The water tank delivers cold water to the water pump via a pipeline. The water pump pressurizes the cold water and delivers it to the biogas flare. The biogas flare heats the cold water and outputs hot water to the heat exchanger. The heat exchanger adjusts the temperature of the hot water according to the target temperature and outputs water at the target temperature to the user.

2. The biogas flare waste heat utilization system according to claim 1, characterized in that, The water tank is directly connected to the heat exchanger to supply cold water to the heat exchanger.

3. The biogas flare waste heat utilization system according to claim 1, characterized in that, The inlet of the biogas flare is at a higher level than the outlet of the biogas flare.

4. The biogas flare waste heat utilization system according to claim 1, characterized in that, It also includes a water replenishment interface, which is used to replenish water to the water tank to the qualified water level.

5. The biogas flare waste heat utilization system according to claim 1, characterized in that, It also includes overflow outlets.

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