Steam heater

Abstract

The utility model discloses a steam heater, include: the heating furnace body with a plurality of cavity unit, the structure in cavity unit is: cavity unit is divided into upper portion, middle part and lower portion cavity, the upper portion cavity is divided into the first cavity that communicates heating furnace body upper corresponding first connecting mouth and the second cavity that communicates heating furnace body upper corresponding second connecting mouth, the first cavity is communicated with lower portion cavity through first heat exchange pipe in a plurality of middle part cavities, the second cavity is communicated with lower portion cavity through second heat exchange pipe in a plurality of middle part cavities, the first connecting mouth in each cavity unit all is communicated with the second connecting mouth in the left side adjacent cavity unit of location through a connecting pipe, all middle part cavities left and right through formation whole gas passage, in heating furnace body's left and right two ends are provided with the gas import and gas export of communicating with gas passage. The steam heater can be efficient, economic output temperature is above 800 DEG C steam.

Description

Technical Field

[0001] This utility model relates to the field of steam vaporization technology, and in particular to a steam heater. Background Technology

[0002] Biomass refers to the general term for various organic substances formed directly or indirectly through photosynthesis. It has advantages such as renewability, abundant reserves, low pollution, and storability. It is the fourth largest energy source after coal, oil, and natural gas, and is also an ideal renewable energy source.

[0003] Steam gasification technology is an important technology for utilizing biomass. It uses steam as a gasifying agent to gasify biomass feedstock, ultimately converting it into hydrogen-rich syngas. The temperature of the steam participating in the gasification reaction needs to be maintained above 800℃.

[0004] The steam gasification reactor is the main equipment for steam gasification reaction. During the gasification process, the temperature of the steam introduced into the steam gasification reactor needs to be maintained above 800℃. However, the steam boilers commonly available on the market, although low in operating cost, can only produce steam with a maximum temperature of about 150℃, which cannot meet the steam temperature requirements of the steam gasification reactor. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a steam heater that can efficiently and economically produce steam at a temperature above 800°C with low energy consumption.

[0006] To address the current difficulty in obtaining steam at temperatures above 800°C, the technical solution adopted by this utility model is as follows: The steam heater includes a heating furnace body, wherein the furnace cavity of the heating furnace body is divided into several independent cavity units from left to right.

[0007] The structure within each cavity unit is as follows: A first partition plate and a second partition plate are spaced apart from top to bottom within the cavity unit, dividing it into an independent upper cavity, a middle cavity, and a lower cavity. A third partition plate is provided within the upper cavity, dividing it into a first cavity and a second cavity from left to right. A first connection port communicating with the first cavity is provided at the top of the heating furnace body, and the first cavity is connected to the lower cavity via several first heat exchange tubes located in the middle cavity. A second connection port communicating with the second cavity is provided at the top of the heating furnace body, and the second cavity is connected to the lower cavity via several second heat exchange tubes located in the middle cavity.

[0008] The first connection port in each cavity unit is connected to the second connection port in the cavity unit adjacent to it on the left side via a connecting pipe; the first connection port in the cavity unit at the leftmost end is the steam outlet, and the second connection port in the cavity unit at the rightmost end is the steam inlet.

[0009] The central cavity in each cavity unit is through-flowing from left to right, so that the central cavities in all cavity units are connected to form a gas channel for gas to pass through; a gas inlet connected to the gas channel is provided at the left end of the heating furnace body, and a gas outlet connected to the gas channel is provided at the right end of the heating furnace body.

[0010] At this point, the high-temperature gas enters the gas channel through the gas inlet, indirectly exchanging heat with the steam in each of the first and second heat exchange tubes, releasing heat before flowing out from the gas outlet. The steam enters the heating furnace body through the steam inlet, first entering the rightmost cavity unit, then flowing sequentially through the second cavity, each of the second heat exchange tubes, the lower cavity, each of the first heat exchange tubes, and the first cavity within that rightmost cavity unit. It then flows to the left into the adjacent cavity unit, passing through the second cavity, each of the second heat exchange tubes, the lower cavity, each of the first heat exchange tubes, and the first cavity within that cavity unit, continuing to flow to the left in a serpentine pattern, finally exiting from the steam outlet. During the steam flow, the steam passing through each of the first and second heat exchange tubes undergoes assisted and indirect heat exchange with the high-temperature gas in the gas channel, absorbing heat.

[0011] Furthermore, in the aforementioned steam heater, the third partition plate in each cavity unit evenly divides the upper cavity of the cavity unit, thereby making the space of the first cavity and the space of the second cavity in the cavity unit the same size.

[0012] Furthermore, in the aforementioned steam heater, the positional relationship of the first partition plate, second partition plate, third partition plate, first heat exchange tubes, and second heat exchange tubes in each cavity unit is as follows: the first partition plate and second partition plate are arranged horizontally; the third partition plate is perpendicular to the first partition plate; the axis of each first heat exchange tube is perpendicular to the first partition plate, and the axis of each second heat exchange tube is perpendicular to the first partition plate. This arrangement of the components in each cavity unit allows for a more compact overall structure.

[0013] Furthermore, in the aforementioned steam heater, each of the first heat exchange tubes in each cavity unit is evenly spaced and parallel to each other.

[0014] The second heat exchange tubes in each cavity unit are evenly spaced and parallel to each other.

[0015] The number of the first heat exchange tubes in each cavity unit is the same as the number of the second heat exchange tubes.

[0016] Furthermore, in the aforementioned steam heater, the furnace cavity of the heating furnace body is rectangular in shape;

[0017] Each cavity unit's corresponding first connection port is connected to the first cavity of that cavity unit through a frustum-shaped first connection pipe.

[0018] The second connection port corresponding to each cavity unit is connected to the second cavity of the cavity unit through a frustum-shaped second connection pipe.

[0019] The gas inlet is connected to the central cavity in the leftmost cavity unit via a frustum-shaped third connecting pipe.

[0020] The gas outlet is connected to the central cavity in the rightmost cavity unit via a frustum-shaped fourth connecting pipe.

[0021] The high-temperature gas introduced into the gas inlet of the steam heater can be high-temperature flue gas, which can be sourced from the combustion chamber. In this design, an additional combustion chamber is provided, and the flue gas outlet of the combustion chamber is connected to the gas inlet of the heating furnace body through the left flue gas pipe.

[0022] The combustible material in the combustion chamber can be the combustible gas produced by an economical and environmentally friendly biomass gasification furnace. A burner is installed on the combustion chamber, and the air inlet of the burner is connected to the combustible gas outlet of the biomass gasification furnace through a combustible gas pipeline.

[0023] After the high-temperature flue gas heats the steam, the temperature is still relatively high. Therefore, it is necessary to cool it down. This solution also includes a heat exchanger and an induced draft fan. The gas outlet of the heating furnace body is connected to the air inlet of the heat exchanger and the induced draft fan in sequence through the flue gas pipe on the right side.

[0024] The steam introduced into the steam heater can be steam produced by a steam boiler. A steam boiler is installed, and the steam outlet of the steam boiler is connected to the steam inlet through a steam pipeline.

[0025] The advantages of this utility model are: simple and compact structure, easy operation, low energy consumption and economical and environmentally friendly, and the ability to produce steam at a temperature of over 800℃ efficiently and economically. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the steam heater described in this utility model.

[0027] Figure 2 yes Figure 1 A partially enlarged structural diagram.

[0028] Figure 3 yes Figure 1 A schematic diagram of the structure from a top-down view.

[0029] Figure 4 yes Figure 3 A partially enlarged structural diagram.

[0030] Figure 5 yes Figure 3 A schematic diagram of the internal structure of the furnace cavity of the medium-heating furnace.

[0031] Figure 6 yes Figure 5 A partially enlarged structural diagram.

[0032] Figure 7 This is a schematic diagram showing the connection relationship between the steam heater, the steam boiler, and the biomass gasification furnace.

[0033] in:

[0034] 1. Heating furnace body; 100. Cavity unit; 101. First cavity; 102. Second cavity; 103. Middle cavity; 104. Lower cavity; 105. First connection port; 106. Second connection port; 107. Gas inlet; 108. Gas outlet; 2. First partition plate; 3. Second partition plate; 4. Third partition plate; 5. First heat exchange tube; 6. Second heat exchange tube; 7. Connecting pipe; 8. First connecting pipe; 9. Second connecting pipe; 10. Third connecting pipe; 11. Fourth connecting pipe; 12. Steam boiler; 13. Steam pipeline; 14. Combustion chamber; 15. Left flue gas duct; 16. Biomass gasification furnace; 17. Combustible gas pipeline; 18. Burner; 19. Heat exchanger; 20. Exhaust fan; 21. Right flue gas duct. Detailed Implementation

[0035] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0036] Exemplary embodiments will be described more fully below with reference to the accompanying drawings; however, these exemplary embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] Furthermore, for ease of description, this utility model is referred to as Figure 1 The left-hand direction shown is defined as "left". Figure 1 The right-hand direction shown is defined as "right". All directional terms "left" and "right" involved in this utility model shall be based on the above definition.

[0039] like Figure 1 and Figure 2 As shown, the steam heater described in this embodiment includes a heating furnace body 1. The furnace cavity of the heating furnace body 1 is divided into several independent cavity units 100 from left to right. More preferably, each cavity unit 100 occupies an equal space. The number of cavity units 100 is usually between four and six.

[0040] The structure within each cavity unit 100 is as follows: Figure 2 As shown, a first partition plate 2 and a second partition plate 3 are arranged at intervals from top to bottom in the cavity unit 100, dividing the cavity unit 100 into an independent upper cavity, a middle cavity 103, and a lower cavity 104 from top to bottom through the first partition plate 2 and the second partition plate 3; a third partition plate 4 is arranged in the upper cavity, dividing the upper cavity from left to right into a first cavity 101 and a second cavity 102 through the third partition plate 4; a more preferred embodiment is that the space occupied by the first cavity 101 and the second cavity 102 is equal.

[0041] A first connection port 105 communicating with a first cavity 101 is provided at the top of the heating furnace body 1. The first cavity 101 is connected to a lower cavity 104 through a plurality of first heat exchange tubes 5 disposed in a middle cavity 103. A second connection port 106 communicating with a second cavity 102 is provided at the top of the heating furnace body 1. The second cavity 102 is connected to a lower cavity 104 through a plurality of second heat exchange tubes 6 disposed in a middle cavity 103.

[0042] A more preferred embodiment is that the furnace cavity of the heating furnace body 1 is designed in a cuboid shape; the first connection port 105 corresponding to each cavity unit 100 is connected to the first cavity 101 of the cavity unit 100 through a frustum-shaped first connecting pipe 8; the second connection port 106 corresponding to each cavity unit 100 is connected to the second cavity 102 of the cavity unit 100 through a frustum-shaped second connecting pipe 9, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown.

[0043] The first connection port 105 in each cavity unit 100 is connected to the second connection port 106 in the cavity unit 100 located to the left of the cavity unit 100 via a connecting pipe 7; the first connection port 105 in the cavity unit 100 located at the leftmost end is the steam outlet, and the second connection port 106 in the cavity unit 100 located at the rightmost end is the steam inlet.

[0044] The central cavity 103 in each cavity unit 100 is connected from left to right, so that the central cavities 103 in all cavity units 100 are connected to form a gas channel for gas to pass through; a gas inlet 107 connected to the gas channel is provided at the left end of the heating furnace body 1, and a gas outlet 108 connected to the gas channel is provided at the right end of the heating furnace body 1.

[0045] A more preferred embodiment is that the gas inlet 107 is connected to the central cavity 103 in the leftmost cavity unit 100 via a frustum-shaped third connecting pipe 10; and the gas outlet 108 is connected to the central cavity 103 in the rightmost cavity unit 100 via a frustum-shaped fourth connecting pipe 11. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown.

[0046] The working principle of the steam heater is as follows: Steam (the temperature of the steam is usually around 150°C) enters the second cavity 102 in the rightmost cavity unit 100 through the steam inlet, and flows sequentially through each of the second heat exchange tubes 6, the lower cavity 103, each of the first heat exchange tubes 5, and the first cavity 101 in the cavity unit 100 before flowing into the cavity unit 100 adjacent to the left of the cavity unit. The steam flow path is a serpentine path.

[0047] High-temperature gas (typically around 1000℃) enters the central cavity 103 of the leftmost cavity unit 100 through the gas inlet 107, and flows out from the gas outlet after passing through the central cavity 103 of each cavity unit 100 from left to right. During this process, the high-temperature gas indirectly exchanges heat with the steam in each of the first heat exchange tubes 5 and the second heat exchange tubes 6, releasing heat.

[0048] During the flow of steam and high-temperature gas, the steam located in each of the first heat exchange tubes 5 and the second heat exchange tubes 6 undergoes indirect heat exchange with the high-temperature gas outside the tubes. After absorbing heat, the steam is output, and the output steam temperature can reach more than 800℃, which meets the steam temperature required by the steam gasification reactor.

[0049] The steam source for the steam heater can be a commercially available steam boiler 12, such as... Figure 7As shown, the boiler steam outlet of the steam boiler 12 is connected to the steam inlet of the steam heater through the steam pipeline 13.

[0050] High-temperature gas can be high-temperature flue gas. A combustion chamber 14 is provided, and the flue gas outlet of the combustion chamber 14 is connected to the gas inlet 107 of the heating furnace body 1 through the left flue gas pipe 15. The combustion material in the combustion chamber 14 can be combustible gas or combustible solid material. Considering economic and environmental protection, a biomass gasifier 16 is used here. The combustible gas outlet of the biomass gasifier 16 is connected to the air inlet of the burner 18 through a combustible gas pipe 17. The burner 18 is located in the combustion chamber 14. Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, biomass raw materials are gasified in a biomass gasifier 16 to produce combustible gas, and then the combustible gas produced by biomass gasification is introduced into a burner 18 for combustion to produce high-temperature gas.

[0051] The steam heater utilizes the steam produced by the steam boiler 12 (the steam temperature is usually around 150°C) and the combustible gas produced by biomass gasification. By burning the combustible gas to generate high-temperature flue gas, the steam produced by the steam boiler 12 is reheated, thereby raising the steam temperature to over 800°C.

[0052] The flue gas flowing out of the gas outlet 108 of the heating furnace body 1 needs to be treated. A heat exchanger 19 and an induced draft fan 20 are installed. The gas outlet 108 of the heating furnace body 1 is connected to the air inlet of the heat exchanger 19 and the induced draft fan 20 in sequence through the right flue gas pipe 21.

[0053] The steam heater described above has the advantages of simple and compact structure, easy operation, low energy consumption and economic and environmental protection, and can efficiently and economically produce steam at a temperature of over 800℃.

[0054] In this embodiment, the partition wall that divides the heating furnace body 1 into several independent cavity units 100 can be two partition walls, one partition wall separating two adjacent upper cavities and the other partition wall separating two adjacent lower cavities. Alternatively, the partition wall can be designed as a single unit, with a connecting hole in the middle to allow two adjacent middle cavities to communicate.

[0055] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the preferred positional relationship of the first partition plate 2, the second partition plate 3, the third partition plate 4, the first heat exchange tubes 5, and the second heat exchange tubes 6 in each cavity unit 100 is as follows: the first partition plate 2 and the second partition plate 3 are arranged horizontally; the third partition plate 4 is perpendicular to the first partition plate 2; the axis of each first heat exchange tube 5 is perpendicular to the first partition plate 2, and the axis of each second heat exchange tube 6 is perpendicular to the first partition plate 2.

[0056] The first heat exchange tubes 5 in each cavity unit 100 are evenly spaced and parallel to each other; the second heat exchange tubes 6 in each cavity unit 100 are evenly spaced and parallel to each other; the number of first heat exchange tubes 5 in each cavity unit 100 is the same as the number of second heat exchange tubes 6. A more preferred embodiment is that each first heat exchange tube 5 and each second heat exchange tube 6 adopts a circular tube structure with a uniform aperture, such as... Figure 5 and Figure 6 As shown.

[0057] In each cavity unit 100, the first partition plate 2 can be an independent plate, or it can be a part of a whole plate, with all the first partition plates 2 forming a whole plate. The second partition plate 3 can be in the same way.

[0058] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any modifications or equivalent changes made based on the technical essence of the present utility model shall still fall within the scope of protection claimed by the present utility model.

Claims

1. A steam heater, comprising: A heating furnace body, characterized in that: the furnace cavity of the heating furnace body is divided into several independent cavity units from left to right; The structure within each cavity unit is as follows: A first partition plate and a second partition plate are spaced apart from top to bottom within the cavity unit, dividing it into an independent upper cavity, a middle cavity, and a lower cavity. A third partition plate is provided within the upper cavity, dividing it into a first cavity and a second cavity from left to right. A first connection port communicating with the first cavity is provided at the top of the heating furnace body, and the first cavity is connected to the lower cavity via several first heat exchange tubes located in the middle cavity. A second connection port communicating with the second cavity is provided at the top of the heating furnace body, and the second cavity is connected to the lower cavity via several second heat exchange tubes located in the middle cavity. The first connection port in each cavity unit is connected to the second connection port in the cavity unit adjacent to it on the left side via a connecting pipe; the first connection port in the cavity unit at the leftmost end is the steam outlet, and the second connection port in the cavity unit at the rightmost end is the steam inlet. The central cavity in each cavity unit is through-flowing from left to right, so that the central cavities in all cavity units are connected to form a gas channel for gas to pass through; a gas inlet connected to the gas channel is provided at the left end of the heating furnace body, and a gas outlet connected to the gas channel is provided at the right end of the heating furnace body.

2. The steam heater according to claim 1, characterized in that: The third partition plate in each cavity unit evenly divides the upper cavity of the cavity unit, so that the space of the first cavity and the space of the second cavity in the cavity unit are the same size.

3. The steam heater according to claim 2, characterized in that: The positional relationship of the first partition plate, the second partition plate, the third partition plate, each first heat exchange tube, and each second heat exchange tube in each cavity unit is as follows: the first partition plate and the second partition plate are arranged horizontally; the third partition plate is perpendicular to the first partition plate; the axis of each first heat exchange tube is perpendicular to the first partition plate, and the axis of each second heat exchange tube is perpendicular to the first partition plate.

4. The steam heater according to claim 1, 2, or 3, characterized in that: The first heat exchange tubes in each cavity unit are evenly spaced and parallel to each other. The second heat exchange tubes in each cavity unit are evenly spaced and parallel to each other. The number of the first heat exchange tubes in each cavity unit is the same as the number of the second heat exchange tubes.

5. The steam heater according to claim 1, characterized in that: The furnace cavity of the heating furnace body is rectangular parallelepiped in shape; Each cavity unit's corresponding first connection port is connected to the first cavity of that cavity unit through a frustum-shaped first connection pipe. The second connection port corresponding to each cavity unit is connected to the second cavity of the cavity unit through a frustum-shaped second connection pipe. The gas inlet is connected to the central cavity in the leftmost cavity unit via a frustum-shaped third connecting pipe. The gas outlet is connected to the central cavity in the rightmost cavity unit via a frustum-shaped fourth connecting pipe.

6. The steam heater according to claim 1, characterized in that: It also includes a combustion chamber, the flue gas outlet of which is connected to the gas inlet of the heating furnace body via a left-side flue gas duct.

7. The steam heater according to claim 6, characterized in that: A burner is installed on the combustion chamber, and the air inlet of the burner is connected to the combustible gas outlet of the biomass gasification furnace through a combustible gas pipeline.

8. The steam heater according to claim 1, 6, or 7, characterized in that: It also includes a heat exchanger and an induced draft fan. The gas outlet of the heating furnace body is connected to the air inlet of the heat exchanger and the induced draft fan in sequence through the flue gas pipe on the right side.

9. The steam heater according to claim 1, characterized in that: It also includes steam boilers, whose steam outlets are connected to the steam inlet via steam pipelines.

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