Movable flue gas waste heat utilization device

Abstract

A heat exchange assembly penetrating through an outer shell, a heat preservation layer and an inner box body is arranged and comprises a first heat exchange plate and a second heat exchange plate which are parallel to each other, the first heat exchange plate and the second heat exchange plate form a heat exchange channel in the inner box body, and other spaces form a heat storage space; the heat exchange channels and the heat storage space are arranged in parallel at intervals, the filling amount of phase change energy storage materials in the device is increased, a plate type heat exchange mode is adopted, the heat storage amount and the heat exchange efficiency of the device are improved, heat can be charged through high-temperature steam and smoke waste heat in the heat charging process, the economic benefit of a power plant is improved through utilization of the smoke waste heat, and the economic benefit of the power plant is improved. Energy is saved, and the device is more energy-saving and environment-friendly; heat is stored completely by means of the phase-change energy storage material, only the phase-change energy storage material is arranged in the device in the transportation process, and the transportation difficulty and the transportation cost are reduced; the device is simple in overall structural design, easier to manufacture and convenient to maintain and operate, the operation stability of the device is guaranteed, and the high failure rate of a complex system is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of energy storage, heat supply and waste heat utilization, and particularly relates to a mobile flue gas waste heat utilization device. BACKGROUND

[0002] Industrial waste heat resources are rich in China, mainly including high-temperature waste gas waste heat, cooling medium waste heat, waste steam and waste water waste heat, high-temperature product and slag waste heat, chemical reaction waste heat and the like, and the waste heat resources account for about 17% to 67% of the total fuel consumption, among which the recoverable rate reaches 60%, the waste heat utilization rate has a large room for improvement, and the energy-saving potential is huge. At present, some mobile phase change heat supply devices based on heat storage and energy storage technology have appeared, which recycle waste heat to supply heat for residents, and are usually composed of a phase change heat storage tank and a tractor; the phase change heat storage tank is filled with phase change energy storage materials, the phase change energy storage materials have relatively large phase change latent heat, can change physical properties with temperature changes and provide latent heat, change from solid to liquid to store heat when absorbing heat, and change from liquid to solid to release heat; during operation, the phase change energy storage materials in the phase change heat storage tank store the heat of steam or flue gas generated by a power plant in the phase change energy storage materials through heat exchange with the steam or flue gas, the remaining volume of the heat storage tank after removing the volume occupied by the phase change energy storage materials is directly filled with steam into the tank, and the steam changes into hot water of a certain temperature after heat exchange with cold water pre-filled in the tank and is stored in the heat storage tank, and the heat storage is completed, and the heat storage tank is transported to a heat user end by the tractor to supply heat for the heat user. The mobile phase change heat supply device has the following problems: first, the proportion of the phase change energy storage materials in the heat storage tank to the steam is relatively small, most of the heat needs to be stored by filling steam, resulting in small heat storage capacity; second, relatively high-quality heat, i.e. high-temperature steam, is mainly filled to store heat, resulting in that relatively low-quality flue gas waste heat cannot be utilized again and is wasted, the maximum waste heat recycling rate cannot be achieved, the maximum energy saving and environmental protection cannot be achieved, the tank is filled with hot water during transportation, the weight of the heat storage tank is greatly increased, and the transportation difficulty and cost are increased; and third, the phase change energy storage materials mainly exchange heat with heat exchange media such as flue gas, steam or hot water through heat exchange pipelines, the heat exchange effect of the pipelines is low, and the heat exchange efficiency of the phase change energy storage materials of the device is low.

[0003] In view of the above phenomena and problems, in-depth research is conducted, and a mobile flue gas waste heat utilization device is provided, the interval arrangement between the phase change energy storage materials and heat exchange media such as flue gas, steam or hot water is improved, the overall heat exchange efficiency of the device is improved, the charging and discharging rate is higher, the distribution space in the device is improved, the loading capacity of the phase change energy storage materials is improved, the heat storage capacity of the heat storage device is improved, the structure of the device is simple, the operation stability of the device is improved, and the high failure rate of a complex system is avoided. UTILITY MODEL CONTENTS

[0004] In view of the above existing problems, the utility model provides a mobile flue gas waste heat utilization device, improves the interval arrangement between phase change energy storage material and heat exchange medium such as flue gas, steam or hot water, improves the overall heat exchange efficiency of the device, makes the heat charging and discharging rate higher, improves the distribution space in the device, improves the loading capacity of the phase change energy storage material and improves the heat storage capacity of the heat storage device.

[0005] In order to achieve the above object, the utility model provides a mobile flue gas waste heat utilization device, including tractor and the heat storage tank being arranged on the tractor, the heat storage tank includes the shell body, the heat preservation layer, the inner box and the heat exchange component, the heat preservation layer is arranged between the inner box and the shell body, and is tightly wrapped in the outside of the inner box, the heat exchange component includes the first heat exchange board and the second heat exchange board always parallel with the first heat exchange board, the first heat exchange board and the second heat exchange board first end all penetrate the heat preservation layer at the right side surface of the shell body and the right side surface of the shell body, and the main part all extends to the inside of the inner box, and the tail end all penetrates the heat preservation layer at the left side surface of the inner box and the left side surface of the inner box and extends to the outside of the shell body, the continuous space between the first heat exchange board and the second heat exchange board is arranged as the heat exchange channel, and the heat exchange channel sets the entrance at the right side surface of the shell body and sets the outlet at the left side surface of the shell body, the space between the first heat exchange board and the inner box inner wall, between the second heat exchange board and the inner box inner wall, between the first heat exchange board and the first heat exchange board and between the second heat exchange board and the second heat exchange board is all arranged as the heat storage space, and the heat storage space is provided with phase change energy storage material.

[0006] Preferably, the first heat exchange board and the second heat exchange board are S-shaped in the inner box, the first heat exchange board includes a plurality of first heat exchange transverse plates and first heat exchange side plates, and the second heat exchange board includes a plurality of second heat exchange transverse plates and second heat exchange side plates.

[0007] Preferably, a right header and a left header are further provided, the right header is arranged at the lower part of the right side surface of the shell body and connected with the inlet, and the left header is arranged at the upper part of the left side surface of the shell body and connected with the outlet.

[0008] Preferably, the heat preservation layer is provided with a first support at the top and a second support at the bottom, the first support is fixedly connected between the inner top surface of the shell body and the outer top surface of the inner box, and the second support is fixedly connected between the outer bottom surface of the inner box and the inner bottom surface of the shell body.

[0009] Preferably, the height of the heat exchange channel is lower than the height of the heat storage space.

[0010] Preferably, the first heat exchange plate and the second heat exchange plate are integrally formed by a steel plate.

[0011] Preferably, the right header is provided with a first connecting pipe outside, and the left header is provided with a second connecting pipe outside.

[0012] Preferably, the first support and the second support each comprise two groups of section steels.

[0013] Compared with the prior art, the mobile flue gas waste heat utilization device has the following beneficial effects: the mobile flue gas waste heat utilization device is provided with an outer shell body, a heat preservation layer and an inner tank body from outside to inside, and a heat exchange assembly penetrating through the outer shell body, the heat preservation layer and the inner tank body is arranged; the heat exchange assembly is composed of first heat exchange plates and second heat exchange plates which are parallel to each other; a continuous space between the first heat exchange plates and the second heat exchange plates forms a heat exchange channel in the inner tank body, and other spaces form a heat storage space; the heat exchange channel and phase change energy storage materials stored in the heat storage space are arranged in parallel; the filling amount of the phase change energy storage materials in the device is increased, so that the heat storage capacity of the device is improved; the common pipeline heat exchange form is abandoned, and a plate heat exchange form is adopted; the phase change energy storage materials and heat medium in the heat exchange channel (flue gas or water) perform plane heat exchange through the first heat exchange plates and the second heat exchange plates, so that the overall heat exchange efficiency of the device is greatly improved; in addition, the heat exchange channel is designed to be S-shaped and folded, so that the heat medium in the heat exchange channel and the phase change energy storage materials in the heat storage space can fully exchange heat; the right header and the left header arranged on both sides of the outer shell body can make the heat medium in the heat exchange channel uniformly distributed and flow, so that the situation that the heat medium does not flow in a local part of the heat exchange channel and the heat exchange is insufficient and uneven is avoided.

[0014] The unique design of the heat exchange channel and the heat storage space improves the heat storage capacity and the heat exchange efficiency of the device; during heating, high-temperature steam can be used for heating, and flue gas waste heat can also be used for heating; the use of the flue gas waste heat improves the economic benefits of the power plant, saves energy, is more energy-saving and environment-friendly; the device only contains the phase change energy storage materials during transportation, so that the transportation difficulty and the transportation cost are reduced; the overall structure of the device is simple, so that the device is easy to manufacture, maintain and operate, the operation stability of the device is ensured, and the high failure rate of the complex system is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a structural schematic view of a mobile flue gas waste heat utilization device according to the present application;

[0016] Figure 2 FIG. 4 is a structural schematic view of a heat storage tank according to the present application;

[0017] Figure 3 FIG. 5 is a left view of the heat storage tank according to the present application.

[0018] In the figure: 1 - towing vehicle, 2 - heat storage tank, 3 - outer shell, 31 - right header, 32 - first connecting pipe, 33 - left header, 34 - second connecting pipe, 4 - insulation layer, 41 - section steel, 5 - inner tank, 51 - phase change energy storage material, 61 - first heat exchange plate, 611 - first heat exchange cross plate, 612 - first heat exchange side plate, 62 - second heat exchange plate, 621 - second heat exchange cross plate, 622 - second heat exchange side plate, 63 - heat exchange channel, 631 - inlet, 632 - outlet. DETAILED DESCRIPTION

[0019] To further illustrate the present application, the following description will be made in conjunction with the accompanying drawings. It is particularly pointed out that the embodiments described below are only a part of the embodiments of the present application, 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 scope of protection of the present application.

[0020] Referring to Figure 1 and Figure 2 The embodiment provides a mobile flue gas waste heat utilization device, which mainly comprises a towing vehicle 1 and a heat storage tank 2 arranged on the towing vehicle 1, wherein the main part is a double-layer tank structure heat storage tank 2; the heat storage tank 2 comprises an outer shell 3, an insulation layer 4, an inner tank 5, a heat exchange assembly, a right header 31 and a left header 33, the insulation layer 4 is arranged between the inner tank 5 and the outer shell 3 and tightly wrapped outside the inner tank 5, and the insulation layer 4 is provided with a first supporting piece at the top and a second supporting piece at the bottom, for fixing and supporting between the outer shell 3 and the inner tank 5, the first supporting piece is fixedly connected between the inner top surface of the outer shell 3 and the outer top surface of the inner tank 5, and the second supporting piece is fixedly connected between the outer bottom surface of the inner tank 5 and the inner bottom surface of the outer shell 3; the heat exchange assembly extends through the outer shell 3, the insulation layer 4 and the inner tank 5; the right header 31 is arranged at the lower part of the right side of the outer shell 3, and the left header 33 is arranged at the upper part of the left side of the outer shell 3.

[0021] In the embodiment, the outer shell 3 and the inner box 5 are welded by steel plates, and the inner box 5 generally presents a cuboid structure; the heat preservation layer 4 is filled with heat preservation materials, which can be selected from one or more of rock wool, glass wool, polyurethane, aluminum silicate cotton, aerogel felt and composite silicate; the first support and the second support each include two groups of section steels 41, which are welded and fixed with the outer shell 3 and the inner box 5; the right header 31 and the left header 33 are both cuboid box bodies welded by steel plates, and are welded and fixed with the outer side of the outer shell 3, the first connecting pipe 32 is arranged on the outer side of the right header 31, the second connecting pipe 34 is arranged on the outer side of the left header 33, and the first connecting pipe 32 and the second connecting pipe 34 are also welded and fixed with the outer side of the outer shell 3.

[0022] Referring to Figure 2 and Figure 3 , the heat exchange assembly includes a first heat exchange plate 61 and a second heat exchange plate 62 which is always arranged in parallel with the first heat exchange plate 61, the first heat exchange plate 61 and the second heat exchange plate 62 extend from the right side of the outer shell 3 to the inside of the inner box 5 through the heat preservation layer 4, the main body thereof presents an S-shaped distribution in the inner box 5, and extends from the left side to the outside of the inner box 5 through the heat preservation layer 4 to the outside of the outer shell 3. At this time, the continuous space between the first heat exchange plate 61 and the second heat exchange plate 62 forms a heat exchange channel 63, the heat exchange channel 63 is provided with an inlet 631 on the right side of the outer shell 3 and an outlet 632 on the left side of the outer shell 3, the inlet 631 is connected with the right header 31, and the outlet 632 is connected with the left header 33; other spaces in the inner box 5 constitute heat storage spaces for storing phase change energy storage materials 51, that is, the spaces between the first heat exchange plate 61 and the inner wall of the inner box 5, between the second heat exchange plate 62 and the inner wall of the inner box 5, between the first heat exchange plate 61 and the first heat exchange plate 61, and between the second heat exchange plate 62 and the second heat exchange plate 62 are all heat storage spaces.

[0023] In the embodiment, the first heat exchange plate 61 and the second heat exchange plate 62 are integrally formed by steel plates, the first heat exchange plate 61 includes a plurality of groups of first heat exchange horizontal plates 611 and first heat exchange side plates 612, the second heat exchange plate 62 includes a plurality of groups of second heat exchange horizontal plates 621 and second heat exchange side plates 622, the first heat exchange horizontal plates 611 and the second heat exchange horizontal plates 621 are always parallel and fixed in a heat exchange width, the first heat exchange side plates 612 and the second heat exchange side plates 622 are always parallel and fixed in a heat exchange width, the heat exchange width is the height of the heat exchange channel 63, and the height of the heat exchange channel 63 is lower than the height of any heat storage space.

[0024] Referring to Figure 1 ,Figure 2 and Figure 3 In the embodiment, the heat storage tank 2 mainly works in two aspects of charging heat storage and discharging heat supply. At the waste heat generation end of a factory or the like, the heat storage tank 2 performs the charging heat storage work, at this time, the hot flue gas or high-temperature steam enters the right header 31 through the first connecting pipe 32, and then exchanges heat with the phase change energy storage material 51 in the heat storage space through the heat exchange channel 63 in the inner box 5, the phase change energy storage material 51 absorbs heat, and the state changes from solid to liquid, and the hot flue gas or high-temperature steam completing heat exchange flows out from the left header 33 and the second connecting pipe 34; the charging heat storage process continues until the phase change energy storage material 51 in the heat storage space is completely changed into liquid, and the temperature of the hot flue gas or high-temperature steam at the outlet 632 is the same as that of the hot flue gas or high-temperature steam at the inlet 631, and the heat storage tank 2 is judged to complete the charging heat storage work, and the valves of the first connecting pipe 32 and the second connecting pipe 34 are closed. The charging heat storage completed heat storage tank 2 is transported to the heat user side by the tractor 1, and the heat storage tank 2 performs the discharging heat supply work, at this time, the heat user sends cold water from the first connecting pipe 32 into the right header 31, and then exchanges heat with the phase change energy storage material 51 in the heat storage space through the heat exchange channel 63 in the inner box 5, the phase change energy storage material 51 releases heat, and the state changes from liquid to solid, the cold water absorbs heat and the temperature rises, the hot water after the temperature rises flows out from the left header 33 and the second connecting pipe 34, and is used by the heat user, thereby completing the heat supply for the heat user.

[0025] In the embodiment, the above is only an example and does not limit the protection scope of the application.

[0026] The mobile flue gas waste heat utilization device comprises an outer shell body, an insulation layer and an inner box body arranged in sequence from outside to inside, and a heat exchange assembly penetrating through the outer shell body, the insulation layer and the inner box body; the heat exchange assembly is composed of first heat exchange plates and second heat exchange plates which are parallel to each other, a continuous space between the first heat exchange plates and the second heat exchange plates forms a heat exchange channel in the inner box body, and other spaces form a heat storage space; the heat exchange channel and phase change energy storage material stored in the heat storage space are arranged in parallel, the filling amount of the phase change energy storage material in the device is increased, thereby the heat storage amount of the device is improved, the common pipeline heat exchange form is abandoned, the plate heat exchange form is adopted, the phase change energy storage material and heat medium (flue gas or water) in the heat exchange channel perform plane heat exchange through the first heat exchange plates and the second heat exchange plates, and the overall heat exchange efficiency of the device is greatly improved; in addition, the heat exchange channel is designed to be S-shaped and folded, so that the heat medium in the heat exchange channel and the phase change energy storage material in the heat storage space can fully exchange heat; right headers and left headers arranged on both sides of the outer shell body can make the heat medium in the heat exchange channel uniformly distributed and flowed, and avoid the situation that the heat medium does not flow in a local part of the heat exchange channel, thereby causing insufficient and uneven heat exchange.

[0027] The design of the unique heat exchange channel and the heat storage space of the scheme improves the heat storage amount and the heat exchange efficiency of the device, the charging can not only use high-temperature steam to charge, but also use flue gas waste heat to charge, the use of flue gas waste heat improves the economic benefit of the power plant, saves energy, is more energy-saving and environment-friendly; at the same time, the device only has the phase change energy storage material during transportation, the transportation difficulty and the transportation cost are reduced; the overall structure of the device is simple, more easy to manufacture, maintain and operate, also ensures the operation stability of the device, avoids the high failure rate of the complex system.

[0028] The above disclosed embodiments are only for introducing the utility model in detail, and cannot be used to limit the range of the utility model, therefore, simple improvement and change made according to the application range of the utility model claim still belong to the protection range of the utility model.

[0029] The protection range of the utility model should be limited to the range defined. For ordinary skilled persons in the art, several improvements and refinements can be made without departing from the spirit and scope of the utility model, and these and refinements should also be considered as the protection range of the utility model.

Claims

1. A mobile flue gas waste heat utilization device, comprising a tractor and a heat storage tank arranged on the tractor, characterized in that: The heat storage tank includes an outer shell, an insulation layer, an inner box and a heat exchange component; the insulation layer is arranged between the inner box and the outer shell and tightly wrapped around the outer side of the inner box; the heat exchange component includes a first heat exchange plate and a second heat exchange plate always arranged parallel to the first heat exchange plate, the first heat exchange plate and the second heat exchange plate both having their head ends passing through the right side of the outer shell and the insulation layer at the right side of the outer shell, their main bodies both extend into the interior of the inner box, and their tail ends both passing through the left side of the inner box and the insulation layer at the left side of the inner box and extending to the outside of the outer shell; the continuous space between the first heat exchange plate and the second heat exchange plate is set as a heat exchange channel, the heat exchange channel is provided with an inlet on the right side of the outer shell and an outlet on the left side of the outer shell; the space between the first heat exchange plate and the inner wall of the inner box, between the second heat exchange plate and the inner wall of the inner box, between the first heat exchange plate and the first heat exchange plate, and between the second heat exchange plate and the second heat exchange plate are all set as heat storage spaces, and phase change energy storage material is provided in the heat storage spaces.

2. The mobile flue gas waste heat utilization device according to claim 1, characterized in that: The first heat exchange plate and the second heat exchange plate are distributed in an S shape inside the inner box. The first heat exchange plate includes several groups of first heat exchange transverse plates and first heat exchange side plates, and the second heat exchange plate includes several groups of second heat exchange transverse plates and second heat exchange side plates. A fixed heat exchange width is maintained between the first heat exchange transverse plate and the second heat exchange transverse plate, and a fixed heat exchange width is maintained between the first heat exchange side plate and the second heat exchange side plate.

3. The mobile flue gas waste heat utilization device according to claim 1, characterized in that: A right header and a left header are also provided. The right header is provided at the lower right side of the outer shell and connected to the inlet; the left header is provided at the upper left side of the outer shell and connected to the outlet.

4. The mobile flue gas waste heat utilization device according to claim 1, characterized in that: A first support member is provided on the top of the insulation layer, and a second support member is provided on the bottom; the first support member is fixedly connected between the top surface of the outer shell and the top surface of the inner box body, and the second support member is fixedly connected between the bottom surface of the inner box body and the bottom surface of the outer shell.

5. The mobile flue gas waste heat utilization device according to claim 1, characterized in that: The height of the heat exchange channel is lower than the height of the heat storage space.

6. The mobile flue gas waste heat utilization device according to claim 2, characterized in that: The first heat exchange plate and the second heat exchange plate are both integrally formed of steel plates.

7. The mobile flue gas waste heat utilization device according to claim 3, characterized in that: A first connecting pipe is provided on the outside of the right header, and a second connecting pipe is provided on the outside of the left header.

8. The mobile flue gas waste heat utilization device according to claim 4, characterized in that: The first support member and the second support member each include two groups of steel sections.

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