A regenerator tank for a biomass gasification system

Abstract

The application discloses a heat storage tank for a biomass gasification system, which comprises a tank body and a heat exchange assembly, the tank body is divided into a heat storage part and a heat exchange part, the heat storage part is filled with heat storage materials, the heat exchange assembly comprises a heat exchange element and a heat exchange coil, the heat exchange element is arranged in the heat exchange part, opposite ends of the heat exchange element are used for being connected with the biomass gasification system, and the heat exchange coil extends into the heat storage part. The heat storage tank integrates the tank body and the heat exchange assembly, the heat storage part of the tank body is filled with the heat storage materials, the heat exchange part is provided with the heat exchange assembly, the heat exchange assembly is communicated with the biomass gasification system, heat energy generated in the biomass gasification system can be transmitted to the heat storage materials under lower heat loss, and the heat energy can be stored, so that the heat loss can be greatly reduced, the heat energy can be uniformly radiated into the heat storage part through the heat exchange coil, the heat storage effect is better and more uniform, and heat transmission and heat storage can be facilitated.

Description

Technical Field

[0001] This invention relates to the field of biomass gasification technology, and more specifically to a heat storage tank for a biomass gasification system. Background Technology

[0002] Biomass gasification refers to the process under certain thermodynamic conditions, with the help of air (or oxygen) and water vapor, that causes biomass polymers to undergo pyrolysis, oxidation, and reduction reforming reactions, ultimately converting them into combustible gases such as carbon monoxide, hydrogen, and low-molecular-weight hydrocarbons. A large amount of heat is generated during the gasification process, which can be recovered and utilized.

[0003] A thermal energy storage system refers to a system that uses appropriate methods and specific devices to store temporarily unused or excess heat through certain thermal storage materials, and then releases it for use when needed. The specific devices refer to thermal storage tanks, which store thermal energy by installing thermal storage materials within them. Currently, natural energy sources such as wind, solar, and hydropower can be converted into thermal energy and stored in thermal storage tanks. Similarly, thermal energy storage technology can also be used to store the thermal energy generated by biomass gasification systems, enabling biomass energy to have more flexible uses depending on the situation.

[0004] Patent CN201810034908.2 discloses a waste heat recovery device and method for power peak shaving gas cogeneration. Through the action of a high-temperature heat storage tank, a low-temperature heat storage tank and a flue gas heat exchanger, the heat is replaced and stored in the heat storage tank. When used, the heat is output in reverse.

[0005] Patent CN202120664960.3 discloses a heating system for electric boiler coupled with heat storage tank based on off-peak electricity prices. The electric boiler is connected to the heat storage tank through a heat exchanger, so that heat is stored in the heat storage tank through the heat exchanger.

[0006] In summary, in the aforementioned traditional technologies, the heat storage tank and the heat exchanger are two separate independent devices, resulting in heat loss during the heat exchange process. Furthermore, a large amount of heat storage material needs to be stored for easy transportation during the heat exchange process, which leads to some heat loss in the transportation pipelines, resulting in a relatively large overall heat loss. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, the present invention provides a heat storage tank for a biomass gasification system, which solves the above-mentioned traditional problems. The heat storage tank and the heat exchanger are integrated into one unit, which can greatly reduce heat loss and has a good heat storage effect, making it easy to store thermal energy.

[0008] This invention is achieved using the following technical solution:

[0009] A heat storage tank for a biomass gasification system includes a tank body and a heat exchange assembly disposed within the tank body. The tank body is divided into a heat storage section and a heat exchange section. The heat storage section is filled with heat storage material. The heat exchange assembly includes a heat exchange element and a heat exchange coil. The heat exchange element is placed within the heat exchange section. The opposite ends of the heat exchange element are used to connect to the biomass gasification system. The heat exchange coil extends into the heat storage section.

[0010] Preferably, the heat storage material is molten salt or hot kerosene.

[0011] Preferably, the heat storage material further includes a number of pebbles, each pebble being uniformly filled into the heat storage portion, with filling gaps between each pebble, and the molten salt or hot kerosene being filled into the filling gaps.

[0012] Preferably, the heat exchanger includes a heat exchange body and heat exchange fins extending upward from the heat exchange body. The heat exchange body is provided with a heat flow inlet channel, a flow channel, a heat flow outlet channel, a coil outlet hole, and a coil inlet hole. The heat flow inlet channel is arranged to gradually increase in size. The flow channel is connected to the bottom of the heat exchange part. The heat flow outlet channel is square in shape. The coil outlet holes are located on opposite sides of the heat flow inlet channel and are connected to the inlet of the heat exchange coil. The coil inlet holes are located on opposite sides of the heat flow outlet channel and are connected to the outlet of the heat exchange coil.

[0013] Preferably, a baffle plate is provided between the heat flow inlet channel and the heat flow outlet channel.

[0014] Preferably, the heat exchange fins are arranged perpendicular to the upper part of the heat exchange body, and there is a heat exchange gap between each heat exchange fin.

[0015] Preferably, the heat storage section is provided with a lower heat storage outlet pipe and an upper heat storage inlet pipe, a centrifugal pump is provided on the heat storage outlet pipe, and a low temperature buffer tank is provided on the heat storage inlet pipe.

[0016] Preferably, a return pipe is provided between the heat storage material outlet pipe and the heat storage material inlet pipe.

[0017] Preferably, the heat exchange section is provided with a heat flow inlet pipe and a heat flow outlet pipe, and the heat flow inlet pipe and the heat flow outlet pipe are respectively connected to the heat exchange element.

[0018] Preferably, the lower end of the heat exchange section is provided with a condensate drain pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The heat storage tank of the present invention integrates the tank body and the heat exchange component into one unit. The heat storage part of the tank body holds the heat storage material, and the heat exchange part is equipped with the heat exchange component. The heat exchange component is connected to the biomass gasification system, so that the heat energy generated in the biomass gasification system can be transferred to the heat storage material with low heat loss and stored. This can greatly reduce heat loss. Furthermore, through the action of the heat exchange coil, the heat energy is evenly distributed to the heat storage part, resulting in a better and more uniform heat storage effect, which facilitates heat transfer and storage of heat energy.

[0021] The operation of the heat storage tank of the present invention is simple. When heat energy is needed, the heat storage material can be transported to the energy-consuming unit through the centrifugal pump on the heat storage material outlet pipe, and then returned to the low temperature buffer tank. When energy storage is needed later, the heat storage material can be transported back to the heat storage tank.

[0022] The heat storage tank of this invention uses pebbles and molten salt or hot kerosene. Pebbles have a better heat storage effect and can avoid more heat loss. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a heat storage tank according to a preferred embodiment of the present invention;

[0024] Figure 2 for Figure 1 The heat exchanger shown is in bottom view.

[0025] In the diagram: 10. Tank body; 11. Heat storage section; 110. Heat storage outlet pipe; 111. Heat storage inlet pipe; 112. Centrifugal pump; 113. Low-temperature buffer tank; 114. Return pipe; 12. Heat exchange section; 120. Hot flow inlet pipe; 121. Hot flow outlet pipe; 122. Condensate drain pipe; 20. Heat exchange assembly; 21. Heat exchange element; 210. Heat exchange body; 211. Heat exchange fins; 212. Hot flow inlet channel; 213. Hot flow outlet channel; 214. Coil outlet hole; 215. Coil inlet hole; 22. Heat exchange coil. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In the description of this invention, it should be understood that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be intermediate elements present. Conversely, when an element is referred to as being "directly" connected to another element, there are no intermediate elements.

[0029] Please see Figure 1 and Figure 2 This is a preferred embodiment of the heat storage tank of the present invention, used to connect to a biomass gasification system and store the thermal energy, such as high-temperature gas, generated during the gasification process of the biomass gasification system. Specifically, the heat storage tank includes a tank body 10 and a heat exchange assembly 20 disposed within the tank body 10. The tank body 10 is divided into a heat storage section 11 and a heat exchange section 12. The heat storage section 11 is filled with heat storage material. The heat exchange assembly 20 includes a heat exchange element 21 and a heat exchange coil 22. The heat exchange element 21 is placed within the heat exchange section 12, and its opposite ends are used to connect to the biomass gasification system. The heat exchange coil 22 extends into the heat storage section 11.

[0030] The aforementioned heat storage tank integrates the tank body 10 with the heat exchange component 20. The heat storage part 11 of the tank body 10 holds the heat storage material, and the heat exchange part 12 is equipped with the heat exchange component 20. The heat exchange component 20 is connected to the biomass gasification system, so that the heat energy generated in the biomass gasification system can be transferred to the heat storage material with low heat loss and stored, which can greatly reduce heat loss. Furthermore, through the action of the heat exchange coil 22, the heat energy is evenly distributed to the heat storage part 11, resulting in a good and uniform heat storage effect, which facilitates heat transfer and stores the heat energy.

[0031] In one embodiment, the heat storage material is molten salt, hot kerosene, or other heat storage substances. The molten salt is a melt composed of metal cations and non-metal anions, such as halides of alkali metals and alkaline earth metals, nitrates, and sulfates. Preferably, the heat storage material further includes several pebbles, each pebble being uniformly filled into the heat storage portion 11, with gaps between the pebbles. The molten salt or hot kerosene is then filled into these gaps. By using pebbles in combination with molten salt or hot kerosene, the heat storage effect of the pebbles is improved, and more heat loss can be avoided.

[0032] In one embodiment, such as Figure 2 As shown, the heat exchanger 21 includes a heat exchange body 210 and heat exchange fins 211 extending upward from the heat exchange body 210. The heat exchange body 210 is provided with a heat flow inlet channel 212, a flow channel, a heat flow outlet channel 213, a coil outlet hole 214, and a coil inlet hole 215. The heat flow inlet channel 212 is arranged in a gradually increasing manner. The flow channel is connected to the bottom of the heat exchange part 12. The heat flow outlet channel 213 is square in shape. The coil outlet hole 214 is located on opposite sides of the heat flow inlet channel 212 and is connected to the inlet of the heat exchange coil 22. The coil inlet hole 215 is located on opposite sides of the heat flow outlet channel 213 and is connected to the outlet of the heat exchange coil 22. This allows heat energy to be transferred to the upper part of the tank body 10, while the residence time at the bottom of the tank body 10 is longer, which facilitates heat transfer. Preferably, a baffle plate is provided between the heat flow inlet channel 212 and the heat flow outlet channel 213. The heat exchange fins 211 are arranged perpendicular to the upper part of the heat exchange body 210, and there are heat exchange gaps between each heat exchange fin 211. The width of the heat exchange gaps is smaller than the width of the pebbles, that is, the heat exchange gaps can only be filled with molten salt or hot kerosene to avoid the pebbles causing adverse damage.

[0033] In another embodiment, the heat storage section 11 is provided with a lower heat storage outlet pipe 110 and an upper heat storage inlet pipe 111. A centrifugal pump 112 is installed on the heat storage outlet pipe 110, and a low-temperature buffer tank 113 is installed on the heat storage inlet pipe 111. Molten salt or hot kerosene is transported to the energy-consuming unit via the centrifugal pump 112. Preferably, a return pipe 114 is also provided between the heat storage outlet pipe 110 and the heat storage inlet pipe 111 to facilitate the flow of molten salt or hot kerosene between the upper and lower parts of the tank body 10, thereby facilitating heat transfer.

[0034] In one embodiment, the heat exchange section 12 is provided with a heat inlet pipe 120 and a heat outlet pipe 121. The heat inlet pipe 120 and the heat outlet pipe 121 are respectively connected to the heat exchange element 21 and are connected to the heat of the biomass gasification system.

[0035] Preferably, the lower end of the heat exchange section 12 is provided with a condensate drain pipe 122 to drain the condensate.

[0036] The tank body 10 of the present invention is equipped with control valves, temperature detectors, pressure detectors and level gauges on corresponding equipment to form a better control system and realize automated control.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A heat storage tank for a biomass gasification system, characterized in that, The device includes a tank body and a heat exchange assembly disposed within the tank body. The tank body is divided into a heat storage section and a heat exchange section. The heat storage section is filled with heat storage material. The heat exchange assembly includes a heat exchange element and a heat exchange coil. The heat exchange element is placed within the heat exchange section. The opposite ends of the heat exchange element are used to connect to a biomass gasification system. The heat exchange coil extends into the heat storage section. The heat exchanger includes a heat exchange body and heat exchange fins extending upward from the heat exchange body. The heat exchange body is provided with a heat flow inlet channel, a flow channel, a heat flow outlet channel, a coil outlet hole, and a coil inlet hole. The heat flow inlet channel is arranged to gradually increase in size. The flow channel is connected to the bottom of the heat exchange part. The heat flow outlet channel is square in shape. The coil outlet holes are located on opposite sides of the heat flow inlet channel and are connected to the inlet of the heat exchange coil. The coil inlet holes are located on opposite sides of the heat flow outlet channel and are connected to the outlet of the heat exchange coil.

2. The heat storage tank for a biomass gasification system according to claim 1, characterized in that, The heat storage material is molten salt or hot kerosene.

3. The heat storage tank for a biomass gasification system according to claim 2, characterized in that, The heat storage material also includes several pebbles, each pebble is uniformly filled into the heat storage part, and there are filling gaps between each pebble, and the molten salt or hot kerosene is filled into the filling gaps.

4. The heat storage tank for a biomass gasification system according to claim 1, characterized in that, A baffle plate is provided between the heat flow inlet channel and the heat flow outlet channel.

5. The heat storage tank for a biomass gasification system according to claim 1, characterized in that, The heat exchange fins are arranged perpendicular to the upper part of the heat exchange body, and there is a heat exchange gap between each heat exchange fin.

6. The heat storage tank for a biomass gasification system according to claim 1, characterized in that, The heat storage section is provided with a lower heat storage outlet pipe and an upper heat storage inlet pipe. A centrifugal pump is provided on the heat storage outlet pipe, and a low-temperature buffer tank is provided on the heat storage inlet pipe.

7. The heat storage tank for a biomass gasification system according to claim 6, characterized in that, A return pipe is also provided between the heat storage material outlet pipe and the heat storage material inlet pipe.

8. The heat storage tank for a biomass gasification system according to claim 1, characterized in that, The heat exchange section is provided with a heat flow inlet pipe and a heat flow outlet pipe, which are respectively connected to the heat exchange element.

9. The heat storage tank for a biomass gasification system according to claim 8, characterized in that, The lower end of the heat exchange section is equipped with a condensate drain pipe.

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