A gas direct-fired superconducting partition-type high-efficiency purification and heating device

Abstract

The present invention belongs to the technical field of gas direct-fired heating devices, and in particular, is a gas direct-fired superconducting partition-type high-efficiency purification heating device, including a heat exchange box, a sandwich square box installed in the heat exchange box, a heat storage body installed inside the sandwich square box, one end of the sandwich square box is connected to a burner mounting seat, and one end of the burner mounting seat is fixed with an oxygen-type gas burner. The present invention adopts partition-type heat storage heating, long channel heat exchange, progressive heat release and other structures to ensure efficient transmission of heat energy and that the circulating hot air will not be thermally decomposed and carbonized in the heating area to produce a large amount of pollutants. The built-in furnace avoids the loss of heat energy during transportation. The use of a dual-channel combustion-supporting air oxygen combustion system and a gas-to-gas heat exchange device controls the amount of nitrogen oxides produced while incinerating a large amount of harmful polluting gases. The waste heat is also reasonably and effectively reused, solving the problem of the difficulty in recycling low-temperature waste heat.

Description

Technical Field

[0001] The invention relates to the technical field of gas direct-fired heating devices, in particular to a gas direct-fired superconducting partition-type high-efficiency purification and heating device. Background Art

[0002] Hot air setting machine is mainly used for drying and setting process of post-dry finishing of fiber products, involving long-hair fur, medium-high-hair blanket industry and thin-hair including home textile industry, clothing industry, decorative fabric industry and so on.

[0003] The working principle of the hot air setting machine is: the heat source blows and heats the fabric evenly through the built-in circulating air duct, so that the fabric fibers are heated and expanded to set, meeting the process requirements. The cleanliness of the hot air and the uniformity of the temperature directly determine the final setting effect. The existing hot air heating methods mainly include heat exchanger heating, gas direct-fired open built-in heating, etc. During the heating process, a large amount of difficult-to-purify industrial organic waste gas is generated in the working area to varying degrees, and the hot air circulation heating process causes varying degrees of pollution to the fabric. If it is not recycled, the heat energy consumption is huge, which seriously affects the healthy development of the industry. Efficient heat exchange and clean transmission and recycling of heat sources are the most urgent issues that need to be solved.

[0004] The heat sources of existing hot air setting machines heated by heat exchangers mainly include medium-pressure steam, thermal oil, etc. Due to the high process temperature of the hot air setting machine, the steam pressure in the heat exchanger is required to be high, and a stable heat source can only be obtained within a relatively close range of the thermal power plant, which is restricted by the region; for thermal oil heat exchangers, the pipeline transportation distance of the thermal oil is required to be higher, and it is generally not recommended to be greater than 300 meters. This requires the construction of thermal oil boilers at multiple locations, which invisibly increases the difficulty of air treatment. The heating methods of heat exchangers require pipeline transportation of heat energy, the process loss has always been high, and the pipeline maintenance is difficult, which is easy to cause production accidents.

[0005] In the existing gas direct-fired open built-in heating method, during the gas combustion process, the combustion flame directly contacts the circulating air containing oil smoke, dust, fluff debris, etc., the combustion condition is extremely poor, and a large amount of carbon oxides, nitrogen oxides, solid dust particles and other pollutants are generated. The content of non-methane total hydrocarbons in the circulating air is extremely high, which can easily cause production accidents such as combustion and deflagration. In addition, the exhaust gas composition is complex, and the content of harmful components far exceeds the performance range of existing organic waste gas purification process equipment. When a large amount of pollutants are discharged from the outside of the hot square setting machine, it causes great damage to the environment and human body.

[0006] The process requirements and existing heating methods of the setting machine require a large amount of high-quality clean heat source input during the production process, while generating a large amount of low-quality heat source and polluted exhaust gas emissions, resulting in high energy consumption and high pollution. In response to the current situation, a gas-fired direct-fired superconducting partition-type high-efficiency purification and heating device was invented to effectively solve the existing practical problems in the industry. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies of the prior art, the present invention provides a gas direct-fired superconducting partition-type high-efficiency purification and heating device, which solves the problems raised in the above-mentioned background technology.

[0009] (II) Technical solution

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a gas direct-fired superconducting partition-type high-efficiency purification and heating device, comprising a heat exchange box, a sandwich square box is installed in the heat exchange box, a heat storage body is installed inside the sandwich square box, one end of the sandwich square box is connected to a burner mounting seat, one end of the burner mounting seat is fixed with an oxygen-fired gas burner, a finned heat pipe is arranged inside the heat exchange box, one end of the finned heat pipe is fixedly connected to the heat storage body, a spiral channel is installed inside the heat exchange box, a hole is opened on the surface of the spiral channel, the fin part of the surface of the finned heat pipe passes through the hole on the surface of the spiral channel, a heat radiation pipe is arranged inside the heat exchange box, the heat radiation pipe is arranged inside the spiral channel, the other part of the heat radiation pipe runs through the heat exchange box, a tubular heat exchanger is installed at the exposed port of the heat radiation pipe, and the inlet of the tubular heat exchanger A combustion-supporting fan is installed at the air outlet end, an air filter is installed at one end of the combustion-supporting fan, a three-way air outlet pipe is installed at the air outlet end of the tubular heat exchanger, and first pneumatic butterfly valves are installed at both ends of the three-way air outlet pipe, one end of one of the first pneumatic butterfly valves is fixed with a first induced air duct, one end of the first induced air duct is fixedly connected to the combustion-supporting air outlet of the oxygen-based gas burner, a second induced air duct is fixed at the secondary combustion-supporting air outlet of the oxygen-based gas burner, a second pneumatic butterfly valve is installed at one end of the second induced air duct, a third induced air duct is fixed at one end of the second pneumatic butterfly valve, an induced draft fan is installed at one end of the third induced air duct, an induced draft filter device is fixed at one end of the induced draft fan, a pressure switch is installed at the third induced air duct, and two thermometer fixing plates are installed on the top of the heat exchanger box, and a long thermometer and a short thermometer are respectively installed in the two thermometer fixing plates.

[0011] As a preferred technical solution of the present invention, the interior of the heat storage body is hollow, and the burner pipe of the oxygen-free gas burner is connected to the hollow part of the heat storage body.

[0012] As a preferred technical solution of the present invention, a section of the finned heat pipe is designed without fins, an inner hole is opened on the surface of the heat storage body, and the section of the finned heat pipe without fins is inserted into the inner hole of the heat storage body.

[0013] As a preferred technical solution of the present invention, the portion of the heat radiation tube exposed outside the heat exchange box is provided with U-bolts and pipe supports.

[0014] As a preferred technical solution of the present invention, the exposed end of the heat radiation tube is provided with an external thread, one end of the tubular heat exchanger is provided with an internal thread, and one end of the heat radiation tube is connected to one end of the tubular heat exchanger through threads.

[0015] As a preferred technical solution of the present invention, the bottom end of the long thermometer extends to the hollow part of the heat storage body, and the bottom end of the short thermometer extends to the inner hole of the heat storage body.

[0016] As a preferred technical solution of the present invention, circulating air filters are installed on both side walls of the heat exchange box.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a gas direct-fired superconducting partition-type high-efficiency purification and heating device, which has the following beneficial effects:

[0019] This gas-fired direct-fired superconducting partition-type high-efficiency purification and heating device adopts partition-type heat storage heating, long channel heat exchange, and progressive heat release structures to ensure efficient transmission of thermal energy and that the circulating hot air will not undergo thermal decomposition and carbonization in the heating area to produce a large amount of pollutants. The built-in furnace avoids the loss of thermal energy during transportation. The use of a dual-channel combustion-supporting air oxygen combustion system and a gas-to-gas heat exchange device incinerates a large amount of harmful polluting gases while controlling the amount of nitrogen oxides produced. The waste heat is also reasonably and effectively reused, solving the problem of the difficulty in recovering and utilizing low-temperature waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall top view structure of the present invention;

[0022] Figure 3 2 is a gas flow diagram of the system of the present invention.

[0023] In the figure: 1. heat exchange box; 2. sandwich square box; 3. heat storage body; 4. burner mounting seat; 5. peroxy gas burner; 6. finned heat pipe; 7. spiral channel; 8. thermal radiation tube; 9. tubular heat exchanger; 10. combustion-supporting fan; 11. air filter element; 12. three-way air outlet pipe; 13. first pneumatic butterfly valve; 14. first induced draft pipe; 15. second induced draft pipe; 16. second pneumatic butterfly valve; 17. third induced draft pipe; 18. induced draft fan; 19. induced draft filter device; 20. pressure switch; 21. thermometer fixing plate; 22. long thermometer; 23. short thermometer; 24. circulating air filter. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example

[0026] See also Figure 1-3The present invention provides the following technical solutions: a gas direct-fired superconducting partition-type high-efficiency purification and heating device, comprising a heat exchange box 1, a sandwich square box 2 is installed in the heat exchange box 1, a heat storage body 3 is installed inside the sandwich square box 2, one end of the sandwich square box 2 is connected to a burner mounting seat 4, one end of the burner mounting seat 4 is fixed with an oxygen-free gas burner 5, a finned heat pipe 6 is arranged inside the heat exchange box 1, one end of the finned heat pipe 6 is fixedly connected to the heat storage body 3, a spiral channel 7 is installed inside the heat exchange box 1, a hole is opened on the surface of the spiral channel 7, and the fin part of the surface of the finned heat pipe 6 passes through the hole on the surface of the spiral channel 7, and a heat radiation pipe 8 is arranged inside the heat exchange box 1, and the heat radiation pipe 8 is arranged in the spiral channel 7. , another part of the heat radiation tube 8 passes through the heat exchange box 1, a tubular heat exchanger 9 is installed at the exposed end of the heat radiation tube 8, a combustion-supporting fan 10 is installed at the air inlet end of the tubular heat exchanger 9, an air filter element 11 is installed at one end of the combustion-supporting fan 10, a three-way air outlet pipe 12 is installed at the air outlet end of the tubular heat exchanger 9, both ends of the three-way air outlet pipe 12 are installed with a first pneumatic butterfly valve 13, one end of one of the first pneumatic butterfly valves 13 is fixed with a first induced draft pipe 14, one end of the first induced draft pipe 14 is fixedly connected to the combustion-supporting air outlet of the oxygen-based gas burner 5, a second induced draft pipe 15 is fixed at the secondary combustion-supporting air outlet of the oxygen-based gas burner 5, a second pneumatic butterfly valve 16 is installed at one end of the second induced draft pipe 15, a third induced draft pipe 17 is fixed at one end of the second pneumatic butterfly valve 16, a draft fan 18 is installed at one end of the third induced draft pipe 17, and the draft fan 18 An induced draft filter device 19 is fixed at one end, a pressure switch 20 is installed at the third induced draft duct 17, and two thermometer fixing plates 21 are installed on the top of the heat exchange box 1. A long thermometer 22 and a short thermometer 23 are installed in the two thermometer fixing plates 21 respectively.

[0027] Specifically, the interior of the heat storage body 3 is hollow, and the burner tube of the oxygen-excess gas burner 5 is connected to the hollow part of the heat storage body 3 .

[0028] In this embodiment, the interior of the heat storage body 3 is designed to be hollow so that the burner tube of the oxygen-excess gas burner 5 can be smoothly arranged inside, thereby forming a flame channel, so that the heat storage body 3 can be heated.

[0029] Specifically, a section of the finned heat pipe 6 is designed without fins, an inner hole is opened on the surface of the heat storage body 3, and the section of the finned heat pipe 6 without fins is inserted into the inner hole of the heat storage body 3.

[0030] In this embodiment, a section of the finned heat pipe 6 is designed to be finless so that it can be smoothly inserted into the inner hole of the heat storage body 3, so that the heat storage body 3 can heat the finned heat pipe 6.

[0031] Specifically, the portion of the heat radiation tube 8 exposed outside the heat exchange box 1 is provided with U-bolts and pipe supports.

[0032] In this embodiment, a plurality of U-shaped bolts and pipe supports are provided at the portion of the heat radiation tube 8 exposed from the heat exchange box 1 in order to fix it.

[0033] Specifically, an external thread is provided at the exposed end of the heat radiation tube 8, an internal thread is provided at one end of the tubular heat exchanger 9, and one end of the heat radiation tube 8 is connected to one end of the tubular heat exchanger 9 through threads.

[0034] In this embodiment, one end of the heat radiation tube 8 is connected to one end of the tubular heat exchanger 9 by means of threads, so as to facilitate the disassembly and assembly of the heat radiation tube 8 and the tubular heat exchanger 9 .

[0035] Specifically, the bottom end of the long thermometer 22 extends to the hollow portion of the thermal storage body 3 , and the bottom end of the short thermometer 23 extends to the inner hole of the thermal storage body 3 .

[0036] In this embodiment, the bottom end of the long thermometer 22 is extended to the hollow part of the heat storage body 3 in order to measure the flame temperature in the hollow part of the heat storage body 3, and the bottom end of the short thermometer 23 is extended to the inner hole of the heat storage body 3 in order to measure the internal temperature of the heat storage body 3.

[0037] Specifically, circulating air filters 24 are installed on both side walls of the heat exchange box 1 .

[0038] In this embodiment, circulating air filters 24 are installed on both side walls of the heat exchange box 1 to filter out waste lint and dust of a certain particle size carried in the circulating air, thereby ensuring the cleanliness of the heated circulating air.

[0039] The working principle and use process of the present invention: During the startup ignition stage, the combustion-supporting gas is preheated clean air, and the pipeline flow direction (such as Figure 3 The combustion preheating air arrow in the figure shows the combustion preheating air arrow). The fuel gas enters the mixing zone of the oxygen-type gas burner 5 through the gas supply system. The room temperature air is introduced by the combustion-supporting fan 10 with the air filter 11. After being preheated by the tubular heat exchanger 9, it enters the mixing zone of the oxygen-type gas burner 5 through a branch of the three-way air outlet pipe 12 and a first pneumatic butterfly valve 13. After being mixed with the incoming fuel gas in proportion, it is sprayed out through the burner of the oxygen-type gas burner 5, enters the combustion chamber, ignites and burns, and forms an open flame to heat the heat storage body 3, forming a continuous and stable heat source. When the temperature of the combustion chamber reaches the process requirements, it is monitored and signaled by the long temperature measuring instrument 22, and the control system switches the combustion-supporting air to the induced draft fan 18 pipeline. The preheated air in the combustion-supporting air pipeline switches the flow direction through the second pneumatic butterfly valve 16, and is discharged to the preheating recovery pipeline of the setting machine through the preheating air outlet of the three-way air outlet pipe 12 for recycling. The combustion-supporting gas containing organic waste gas components provided by the induced draft pipeline is mixed with the gas provided by the gas pipeline in the oxygen-permeable gas burner 5 and then burned as fuel to release heat. The combustion-supporting gas flows to (such as Figure 3 The oil-containing gas participates in the combustion as indicated by the arrow). The combustion process temperature is monitored online by the long thermometer 22, and the air-fuel mixture ratio is regulated in real time by the automatic control system to ensure the normal conduct of the over-oxygen and low-nitrogen combustion, and the organic pollutants in the combustion-supporting gas are effectively incinerated and purified. The residual heat in the exhaust gas is directly converted into effective thermal energy at a usable process temperature after participating in the combustion. The exhaust gas of the shaping machine is also effectively purified at the same time, and the total exhaust volume of the difficult-to-treat exhaust gas is reduced by an order of magnitude. The exothermic temperature is detected by the short thermometer 23, and the control system controls the temperature of the contact area between the heat storage body 3 and the fin heat pipe 6, and then regulates the output temperature of the fin heat pipe 6 to ensure the reasonable temperature of the circulating air to be heated in the shaping machine, thereby avoiding the generation of organic pollutants in the working process of the shaping machine and the effective conduct of clean production from the source.

[0040] The heat source of the present invention adopts a partition heat exchange method to perform low temperature difference heat exchange heating on the working circulating air of the setting machine, and this is achieved by technical means such as lengthening the heat exchange interval, increasing the heat exchange contact surface, and controlling the flow characteristics of the circulating air. The heat energy generated by the combustion is conducted to the heating end of the fin heat pipe 6 through the heat storage body 3, and releases heat in the spiral channel 7 through the fin heat exchange end of the fin heat pipe 6. The high-temperature exhaust gas formed by the combustion is continuously radiated and cooled by the heat radiation tube 8 before reaching the tubular heat exchanger 9. After the air is preheated, it is further cooled. After the exhaust gas temperature reaches the standard, it is discharged to the main exhaust pipe of the setting machine and discharged after centralized treatment. The hot air generated by the combustion flows in the following direction (such as Figure 3 The combustion forms hot gases (as indicated by the arrows).

[0041] The hot air and power of the working cycle of the setting machine are provided by the circulating air system of the setting machine. The present invention is used as a process channel of the entire circulating air system, and it can be effectively connected. The circulating air to be heated enters after being filtered by the circulating air filter 24 set at the square box end of the heat exchange box 1 (such as Figure 3 The low-temperature wind of the working cycle (as shown by the arrow) flows through the heating channel formed by the spiral channel 7 and the fin heat pipe 6. During the flow process, the spiral blades arranged on the spiral channel 7 divide the concentric circle space formed by its inner cylinder and the cylinder of the heat exchange box 1 into multiple continuous spaces. Due to the existence of centrifugal force, the circulating air has the characteristic of flowing outward during the spiral flow. The layered fin heat pipes 6 pass through and divide the heating channel, and a pressure difference is formed between the windward side and the leeward side of the fin heat pipe 6, thereby changing the flow direction of the circulating air, that is, increasing the contact area with the fins on the heat pipe. The setting of the spiral channel 7 increases the heating stroke of the circulating air. The pressure difference in the heating zone increases the fluctuation of the circulating air flow process, improves the temperature consistency of the hot air after heating, and the long flow stroke increases the heat exchange time and improves the heat exchange efficiency. The heated circulating air flows out from the air outlet of the heat exchange box 1 in two ways, forming a hot cycle working wind (such as Figure 3 The hot air in the working cycle (as shown by the arrow) enters the circulating air system of the setting machine to complete the heating of the circulating air.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas direct-fired superconducting partition-type high-efficiency purification and heating device, comprising a heat exchange box (1), characterized in that: The heat exchange box (1) is installed with a sandwich square box (2), a heat storage body (3) is installed inside the sandwich square box (2), one end of the sandwich square box (2) is connected to a burner mounting seat (4), one end of the burner mounting seat (4) is fixed with an oxygen-permeable gas burner (5), a finned heat pipe (6) is arranged inside the heat exchange box (1), one end of the finned heat pipe (6) is fixedly connected to the heat storage body (3), a spiral channel (7) is installed inside the heat exchange box (1), a hole is opened on the surface of the spiral channel (7), the finned part of the surface of the finned heat pipe (6) passes through the hole on the surface of the spiral channel (7), and the heat exchange box (1) is provided with a spiral channel (7). ) is provided with a heat radiation tube (8) inside, the heat radiation tube (8) is arranged inside the spiral channel (7), another part of the heat radiation tube (8) passes through the heat exchange box (1), a tubular heat exchanger (9) is installed at the exposed end of the heat radiation tube (8), a combustion-supporting fan (10) is installed at the air inlet end of the tubular heat exchanger (9), an air filter element (11) is installed at one end of the combustion-supporting fan (10), a three-way air outlet pipe (12) is installed at the air outlet end of the tubular heat exchanger (9), both ends of the three-way air outlet pipe (12) are installed with a first pneumatic butterfly valve (13), one end of which is fixed with a first induction valve. An air duct (14), one end of the first induced draft duct (14) is fixedly connected to the combustion-supporting air port of the oxygen-type gas burner (5), a second induced draft duct (15) is fixedly connected to the secondary combustion-supporting air port of the oxygen-type gas burner (5), one end of the second induced draft duct (15) is installed with a second pneumatic butterfly valve (16), one end of the second pneumatic butterfly valve (16) is fixedly connected to a third induced draft duct (17), one end of the third induced draft duct (17) is installed with an induced draft fan (18), one end of the induced draft fan (18) is fixedly connected to an induced draft filter device (19), a pressure switch (20) is installed at the third induced draft duct (17), and the top of the heat exchange box (1) Two thermometer fixing plates (21) are installed, and a long thermometer (22) and a short thermometer (23) are installed in the two thermometer fixing plates (21) respectively; the interior of the heat storage body (3) is hollow, and the burner tube of the oxygen-free gas burner (5) is connected to the hollow part of the heat storage body (3); a section of the finned heat pipe (6) is of finless design, and an inner hole is opened on the surface of the heat storage body (3), and the finless section of the finned heat pipe (6) is inserted into the inner hole of the heat storage body (3); the bottom end of the long thermometer (22) extends to the hollow part of the heat storage body (3), and the bottom end of the short thermometer (23) extends to the inner hole of the heat storage body (3).

2. According to claim 1, a gas direct-fired superconducting partition-type high-efficiency purification and heating device is characterized in that: The portion of the heat radiation pipe (8) exposed outside the heat exchange box (1) is provided with a U-shaped bolt and a pipe support.

3. According to claim 1, a gas direct-fired superconducting partition-type high-efficiency purification and heating device is characterized by: The exposed end of the heat radiation tube (8) is provided with an external thread, one end of the tubular heat exchanger (9) is provided with an internal thread, and one end of the heat radiation tube (8) is connected to one end of the tubular heat exchanger (9) through a thread.

4. A gas direct-fired superconducting partition-type high-efficiency purification and heating device according to claim 1, characterized in that: Circulating air filters (24) are installed on both side walls of the heat exchange box (1).

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