Efficient heat exchange spiral coil pipe hearth

Abstract

The utility model discloses an efficient heat exchange spiral coil pipe hearth which comprises a shell, a spiral heat exchange pipe is arranged in the shell, the spiral heat exchange pipe is divided into three circles, a communicating pipe is communicated between every two circles of the spiral heat exchange pipe, and a plurality of sets of heat absorption pieces are fixedly installed on the outer wall of the spiral heat exchange pipe. The ring diameters of the spiral heat exchange pipes from the outer ring to the inner ring are sequentially increased, and the pipeline diameters from the outer ring to the inner ring are sequentially decreased. The heat absorption pieces absorb heat in smoke and transfer the heat to the spiral heat exchange pipes, so that water in the spiral heat exchange pipes absorbs heat and evaporates, the heat exchange area is increased due to the three-circle arrangement of the spiral heat exchange pipes, and therefore the heating effect is improved, the evaporation efficiency is improved, the heat exchange efficiency is improved, and the smoke emission temperature is reduced to the maximum extent. Generation and emission of harmful substances are reduced, and the requirements of environmental protection laws and regulations are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of coil furnaces, and in particular relates to a high-efficiency heat-exchange spiral coil furnace. Background Art

[0002] A coil furnace is a type of furnace that uses a coil structure for heat exchange. It has the characteristics of delicate structure, beautiful appearance, small size, small footprint, light weight, and good strength. Through its efficient heat exchange capacity, the coil furnace can achieve higher temperatures at lower pressures, achieve stable heating and precise temperature regulation, and thus meet the heating needs of different industrial fields.

[0003] In the prior art, Chinese utility model patent number CN207555643U discloses a double-layer spiral coil membrane fireplace chamber, its furnace body, and heating device. The furnace chamber includes: an outer spiral coil, a spiral sealing plate, and an inner spiral coil extending through the outer spiral coil. The gaps between each spiral of the outer spiral coil are welded with the spiral sealing plate to form a complete cylindrical membrane fireplace chamber.

[0004] The above-mentioned existing technologies, although small in size and compact in structure, realize the overall integration of the furnace membrane wall, form a composite corrugated furnace, strengthen the heat exchange between the spiral coil and the jacket and the furnace; and improve the heat resistance and safety of the fire-facing surface through multi-media coordinated heat exchange, greatly breaking through and surpassing the advantages of traditional straight plate water-cooled walls in many aspects, but the single-circle arrangement of heat exchange tubes cannot fully utilize the heat exchange area, resulting in relatively low heat exchange efficiency, inability to effectively reduce heat loss, and energy waste. Utility Model Content

[0005] In order to solve the technical problem that a single-circle arrangement of heat exchange tubes cannot fully utilize the heat exchange area, resulting in relatively low heat exchange efficiency, inability to effectively reduce heat loss, and resulting in energy waste, the utility model provides a high-efficiency heat exchange spiral coil furnace.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-efficiency heat exchange spiral coil furnace, comprising a shell, wherein a spiral heat exchange tube is arranged inside the shell, the spiral heat exchange tube is arranged in three circles, and a connecting pipe is connected between the inner circle and the outer circle of the spiral heat exchange tube, multiple groups of heat absorbing parts are fixedly installed on the outer wall of the spiral heat exchange tube, and the diameter of the spiral heat exchange tube increases from the outer circle to the inner circle, and the pipe diameter decreases from the outer circle to the inner circle.

[0007] Optionally, the top end of the outer ring of the spiral heat exchange tube is connected to an air inlet pipe, the bottom end of the spiral heat exchange tube is connected to a water inlet pipe, and the middle ring of the spiral heat exchange tube is connected to the inner ring.

[0008] Optionally, a separation box is fixedly mounted on the upper surface of the shell, a steam-water separation box connected to the air intake pipe is fixedly mounted in the inner cavity of the separation box, and a steam-water separation orifice plate is provided above the steam-water separation box.

[0009] Optionally, the upper surface of the separation box is connected to an exhaust pipe, and the bottom of the separation box is connected to a drain pipe, and one end of the drain pipe is connected to a drain valve.

[0010] Optionally, a connecting pipe passes through the top of the shell, and a connecting valve is fixedly installed on the top of the connecting pipe.

[0011] Optionally, a filter element is fixedly installed at the bottom end of the connecting pipe, and a smoke exhaust port is opened on one side of the shell.

[0012] Optionally, the heat absorbing element includes heat absorbing plates, which are spirally distributed on the surface of the spiral heat exchange tube.

[0013] In summary, compared with the prior art, the high-efficiency heat exchange spiral coil furnace provided by the present invention has the following beneficial effects:

[0014] 1. In this utility model, water passes through the spiral heat exchange tube through the water inlet pipe. During heat exchange, the heat absorbing plate absorbs the heat in the flue gas and transfers the heat to the spiral heat exchange tube, causing the water inside the spiral heat exchange tube to absorb heat and evaporate. The three-circle spiral heat exchange tube arrangement increases the heat exchange area, thereby improving the heating effect and evaporation efficiency, thereby improving the heat exchange efficiency, minimizing the exhaust temperature of the flue gas, reducing the generation and emission of harmful substances, and helping to meet the requirements of environmental protection regulations.

[0015] 2. In this utility model, the water vapor in the spiral heat exchange rod enters the steam-water separation box through the air inlet pipe, and the water and steam are separated by the steam-water separation box. The separated steam is further separated by the steam-water separation orifice plate to improve the steam quality.

[0016] 3. In the present invention, impurities in the smoke are filtered through the filter element to reduce the emission of harmful substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the spiral heat exchange tube of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the heat absorbing sheet of the utility model;

[0021] Figure 5 This is a schematic diagram of the top view of the spiral heat exchange tube of the utility model;

[0022] Figure 6 This is a schematic diagram of the filter element structure of the utility model;

[0023] Figure 7 This is a structural diagram of the second embodiment of the present utility model;

[0024] In the figure: 1. Shell; 101. Evaporating tube; 102. First heating tube; 103. Second heating tube; 104. Separating box; 105. Steam pipe; 106. Condenser; 107. Water inlet pipe 1; 108. Smoke outlet; 2. Separating box; 3. Connecting pipe; 4. Connecting valve; 5. Spiral heat exchange tube; 6. Water inlet pipe; 7. Connecting pipe; 8. Heat absorbing plate; 81. Heat absorbing ring; 9. Inlet pipe; 10. Steam-water separation box; 11. Steam-water separation orifice plate; 12. Exhaust pipe; 13. Drain pipe; 14. Drain valve; 15. Filter element; 16. Smoke outlet. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] Example 1:

[0027] refer to Figure 1 and Figure 2 A high-efficiency heat exchange spiral coil furnace includes a shell 1, a connecting pipe 3 passes through the top of the shell 1, and a connecting valve 4 is fixedly installed on the top of the connecting pipe 3. The connecting valve 4 is used to connect to an external combustion device.

[0028] refer to Figure 2 and Figure 5 A filter element 15 is fixedly installed at the bottom end of the connecting pipe 3. The filter element 15 is arranged in the middle of the inner cavity of the shell 1, and the filter element 15 is used to filter impurities in the flue gas and reduce the emission of harmful substances. A smoke exhaust port 16 is opened on one side of the shell 1 for filtering and discharging the flue gas after heat exchange.

[0029] Furthermore, when in use, the smoke from combustion enters the housing 1 through the connecting pipe 3 and is then filtered by the filter element 15 to conduct heat away.

[0030] refer to Figure 2-Figure 4A spiral heat exchange tube 5 is fixedly installed inside the shell 1, and the spiral heat exchange tube 5 is located on the outside of the filter element 15. The spiral heat exchange tube 5 is arranged in three circles. The diameter between the inner circles of the spiral heat exchange tube 5 is 300 mm, the diameter between the middle circles of the spiral heat exchange tube 5 is 380 mm, and the diameter between the outer circles of the spiral heat exchange tube 5 is 450 mm. A connecting pipe 7 is connected between the inner and outer circles of the spiral heat exchange tube 5, and the bottom end of the middle circle of the spiral heat exchange tube 5 is connected with a water inlet pipe 6. The water inlet pipe 6 passes through the lower surface of the shell 1, and the top of the outer circle of the spiral heat exchange tube 5 is connected with an air intake pipe 9 passing through the upper surface of the shell 1. In addition, multiple groups of heat absorption parts are fixedly installed on the outer wall of the spiral heat exchange tube 5. The heat absorption parts are spirally distributed on the surface of the spiral heat exchange tube 5, specifically heat absorption plates 8. The heat absorption plates 8 are components for absorbing and transferring heat, absorbing heat through their surface, and transferring heat to the spiral heat exchange tube 5.

[0031] Furthermore, when in use, water is passed into the middle circle of the spiral heat exchange tube 5 through the water inlet pipe 6, then enters the inner circle from the middle circle, and finally enters the outer circle through the connecting pipe 3. When exchanging heat, the heat absorbing plate 8 absorbs the heat in the flue gas and transfers the heat to the spiral heat exchange tube 5, so that the water inside the spiral heat exchange tube 5 absorbs heat and evaporates. The three-circle arrangement of the spiral heat exchange tube 5 increases the heat exchange area, thereby improving the heating effect and the evaporation efficiency, thereby improving the heat exchange efficiency, minimizing the exhaust temperature of the flue gas, reducing the generation and emission of harmful substances, and helping to meet the requirements of environmental protection regulations.

[0032] refer to Figure 1 and Figure 2 A separation box 2 penetrated by a connecting pipe 3 is fixedly mounted on the upper surface of the shell 1, and a steam-water separation box 10 connected to the air inlet pipe 9 is fixedly mounted on one side of the inner cavity of the separation box 2. The steam-water separation box 10 is a prior art and will not be disclosed in detail here. Through the internal structure design, the gas and liquid in the water vapor are effectively separated, and a steam-water separation orifice plate 11 fixedly mounted in the inner cavity of the separation box 2 is provided above the steam-water separation box 10. The steam-water separation orifice plate 11 is a prior art and will not be disclosed in detail here. Its main function is to reduce the steam flow rate through the throttling effect, so that the steam forms an air cushion under the orifice plate, thereby evenly distributing the steam flow, which helps to further separate water droplets, reduce the water content in the steam, and improve the steam quality.

[0033] Furthermore, when in use, the water vapor in the spiral heat exchange tube 5 enters the steam-water separation box 10 through the air inlet pipe 9, and the water and steam are separated by the steam-water separation box 10. The separated steam is further separated by the steam-water separation orifice plate 11 to improve the steam quality.

[0034] refer to Figure 2The upper surface of the separation box 2 is connected to an exhaust pipe 12 on one side near the air inlet pipe 9 to discharge the separated high-quality steam. The bottom of the separation box 2 is connected to a drain pipe 13 that runs through the top side of the shell 1 to discharge the separated water, and one end of the drain pipe 13 is connected to a drain valve 14.

[0035] refer to Figure 1 One side of the housing 1 is connected to a connection frame. The connection frame houses the evaporation tube 101, the first heating tube 102, the second heating tube 103, and the condenser 106. A water inlet pipe 107 is connected to one side of the condenser 106, and a smoke outlet 108 is connected to the bottom of the condenser 106. The water inlet pipe 107 flows water into the evaporation tube 101, the first heating tube 102, and the second heating tube 103. A separation box 104 is fixedly mounted on the top surface of the connection frame to further separate steam and water. The first heating tube 102 is connected to a steam pipe 105. The separation box 104 is connected to the exhaust pipe 12 and the evaporation tube 101, respectively. The second heating tube 103 is connected to the separation box 104.

[0036] Furthermore, when in use, the steam discharged from the exhaust pipe 12 passes into the separation box 104 for separation again, and the separated steam enters the evaporation tube 101. The high-temperature flue gas discharged through the smoke exhaust port 16 reduces the water content of the steam in the evaporation tube 101, and then is discharged from the steam pipe 105. Subsequently, the water inside it is heated and evaporated by the first heating tube 102. The steam generated by the first heating tube 102 enters the separation box 104, enters the evaporation tube 101, and is subsequently discharged from the steam pipe 105. The steam is then cooled by the second heating tube 103 and finally condensed by the condenser 106 and discharged from the smoke outlet 108 as the flue gas with a lower temperature.

[0037] Example 2:

[0038] refer to Figure 7 The surface of the spiral heat exchange tube 5 is fixedly installed with multiple evenly distributed heat absorption parts, which are annular heat absorption rings 81. The heat absorption rings 81 are made of the same material as the heat absorption sheet 8. They absorb heat through their surface and transfer the heat to the spiral heat exchange tube 5.

[0039] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0040] It should be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0041] The above description shows and describes several preferred embodiments of the present application. However, as previously mentioned, it should be understood that the present application is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present application can be used in various other combinations, modifications, and environments and can be modified within the scope of the application concept described herein through the above teachings or technology or knowledge in the relevant field. Modifications and changes made by those skilled in the art that do not depart from the spirit and scope of the present application should be protected by the claims appended hereto.

Claims

1. A high-efficiency heat exchange spiral coil furnace, characterized in that: The invention comprises a shell (1), wherein a spiral heat exchange tube (5) is arranged inside the shell (1), wherein the spiral heat exchange tube (5) is arranged in three circles, and a connecting tube (7) is connected between the inner circle and the outer circle of the spiral heat exchange tube (5), and multiple groups of heat absorbing parts are fixedly installed on the outer wall of the spiral heat exchange tube (5), and the diameter of the spiral heat exchange tube (5) increases from the outer circle to the inner circle, and the pipe diameter decreases from the outer circle to the inner circle.

2. The high-efficiency heat exchange spiral coil furnace according to claim 1, characterized in that: The top end of the outer circle of the spiral heat exchange tube (5) is connected to an air inlet pipe (9), the bottom end of the middle circle of the spiral heat exchange tube (5) is connected to a water inlet pipe (6), and the middle circle of the spiral heat exchange tube (5) is connected to the inner circle.

3. The high-efficiency heat exchange spiral coil furnace according to claim 1, characterized in that: A separation box (2) is fixedly mounted on the upper surface of the shell (1), a steam-water separation box (10) in communication with an air intake pipe (9) is fixedly mounted in the inner cavity of the separation box (2), and a steam-water separation orifice plate (11) is provided above the steam-water separation box (10).

4. The high-efficiency heat exchange spiral coil furnace according to claim 3, characterized in that: The upper surface of the separation box (2) is connected to an exhaust pipe (12), and the bottom of the separation box (2) is connected to a drain pipe (13), and one end of the drain pipe (13) is connected to a drain valve (14).

5. The high-efficiency heat exchange spiral coil furnace according to claim 3, characterized in that: A connecting pipe (3) passes through the top of the shell (1), and a connecting valve (4) is fixedly installed on the top of the connecting pipe (3).

6. The high-efficiency heat exchange spiral coil furnace according to claim 5, characterized in that: A filter element (15) is fixedly mounted on the bottom end of the connecting pipe (3), and a smoke exhaust port (16) is provided on one side of the housing (1).

7. The high-efficiency heat exchange spiral coil furnace according to claim 1, characterized in that: The heat absorbing element comprises a heat absorbing sheet (8), which is distributed in a spiral manner on the surface of the spiral heat exchange tube (5).

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