Methanol gasification device and kiln system

Abstract

The utility model relates to the technical field of kiln combustion gas supply equipment, in particular to a methanol gasification device and a kiln system. The methanol gasification device comprises a box body, a coil pipe and an electric heating wire; the coil pipe is of a bent and coiled ascending single-channel structure, a bottom port of the coil pipe is communicated with a liquid methanol inlet, and a top port of the coil pipe is communicated with a gaseous methanol outlet; a flue gas inlet and a flue gas outlet are formed in the two sides of the box body respectively, a flue gas heat exchange channel is formed in the box body, and the coil pipe is located in the flue gas heat exchange channel; the heating wire is wound on the coil pipe. The kiln system comprises a kiln, a combustion chamber, a methanol supply system, a flue gas treatment system and the methanol gasification device, and during use, high-temperature flue gas generated by the kiln is cooled by the methanol gasification device and then sent to the flue gas treatment system for treatment; methanol sent out by the methanol supply system is gasified by the methanol gasification device and then sent to the combustor for combustion. The methanol gasification device and the kiln system are low in use cost, energy-saving and environment-friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of kiln combustion gas supply equipment, in particular to a methanol gasification device and a kiln system. Background Art

[0002] As people pay more and more attention to environmental protection issues, the use of new fuels in various aspects of society is also increasing. Among them, methanol is a new alternative fuel. The alcohol mixed fuel obtained by mixing methanol with other combustible gases has a high calorific value and is highly environmentally friendly. The ceramic production industry is a high-energy consumption and high-pollution industry. If alcohol mixed fuels are used to replace traditional fossil fuels, the pollution level of the ceramic production industry will be greatly reduced, reducing costs and increasing efficiency.

[0003] Since methanol is naturally liquid, it is preferred to mix methanol with other fuels in a gaseous state when preparing alcohol mixed fuels. For this purpose, methanol needs to be converted from liquid to gas. In the past, methanol was usually gasified by pressurized gasification, but this requires the purchase of additional pressurizing equipment and atomizing equipment, and requires additional energy supply for the pressurizing equipment, resulting in high equipment investment costs and high operating costs. Utility Model Content

[0004] The utility model aims to provide a methanol gasification device, aiming to solve the problems of high equipment investment cost and high use cost caused by the need to gasify methanol when preparing alcohol mixed fuel in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a methanol gasification device, which includes a box body, a coil and an electric heating wire; the coil is arranged as a single-channel structure that is bent, coiled and ascended, the bottom port of the coil is connected to a liquid methanol inlet, and the top port of the coil is connected to a gaseous methanol outlet; a flue gas inlet and a flue gas outlet are respectively arranged on both sides of the box body, a flue gas heat exchange channel is formed in the box body, and the coil is located in the flue gas heat exchange channel; the electric heating wire is wound around the coil.

[0006] Furthermore, the gaseous methanol outlet is located at the top corner of the box body on one side close to the flue gas inlet, and the liquid methanol inlet is located at the bottom corner of the box body on one side close to the flue gas outlet.

[0007] Further, the density of the topmost layer of the coil is greater than the density of the underlying layers of tubes.

[0008] Furthermore, with the flow direction of the smoke in the smoke channel being horizontal, the topmost layer of the coil is configured as a reciprocating zigzag structure consisting of a plurality of tubes extending longitudinally and connected in sequence; the lower layer of the coil is configured as a single-circle zigzag structure.

[0009] Furthermore, a methanol temperature sensor is provided in the gaseous methanol outlet, and a flue gas temperature sensor is provided in the flue gas inlet.

[0010] Furthermore, a vibration generator is installed on the top plate of the box body, and a dust collecting drawer located in the box body and capable of being pulled out of the box body is arranged at the bottom of the box body.

[0011] Furthermore, the diameter of the coil is 16-20 mm, the wall thickness is 1.8-2.5 mm, the material is 316 stainless steel pipe, and the total length of the coil is 25-35 m.

[0012] Furthermore, the liquid methanol inlet is connected to a liquid delivery component, and a one-way valve and a flow regulating valve are arranged between the liquid methanol inlet and the liquid delivery component. The one-way valve allows the liquid to flow from the liquid delivery component to the liquid methanol inlet in one direction.

[0013] The utility model also provides a kiln system, which includes a kiln, a combustion chamber, a methanol supply system, a flue gas treatment system and the above-mentioned methanol gasification device, wherein a burner is arranged in the combustion chamber, and the combustion chamber is used to heat the kiln; the smoke exhaust port of the kiln is connected with the smoke inlet, the smoke outlet is connected with the smoke inlet of the flue gas treatment system, the methanol supply system is connected with the liquid methanol inlet, and the gaseous methanol outlet is connected with the burner.

[0014] Furthermore, during operation, the temperature of the flue gas inlet is 600-800°C, the temperature of the flue gas outlet is 190-240°C, the temperature of the liquid methanol inlet is 18-25°C, and the temperature of the gaseous methanol outlet is 180-220°C.

[0015] The utility model provides a methanol gasification device. When in use, liquid methanol is input into the liquid methanol inlet, and the flue gas generated when the kiln is working is input into the flue gas inlet. The heat of the flue gas is used to heat the methanol to gasify the methanol. The cooled flue gas is sent out from the flue gas outlet, and the gasified methanol is sent out from the gaseous methanol outlet. The device can recycle the heat of the kiln flue gas to achieve methanol gasification without additional energy consumption. The use cost of the equipment is low, and the structure of the methanol gasification device is simple, and the equipment manufacturing cost is low, thereby making the equipment investment cost of the manufacturer low. In the initial stage of the kiln startup, the flue gas temperature of the kiln is low, and the low-temperature flue gas cannot meet the demand for methanol gasification. For this reason, an electric heating wire is added to the methanol gasification system. When the temperature of the flue gas is not high enough, the electric heating wire is used to heat the coil to gasify the methanol. When the temperature of the flue gas is high enough, the electric heating wire stops working to reduce energy consumption. The kiln system of the utility model is integrated with the above-mentioned methanol gasification device, and the heat of the flue gas of the kiln is utilized, which has the benefits of energy saving and emission reduction.

[0016] Compared with the prior art scheme of atomizing methanol and then burning it, the utility model vaporizes methanol so that the methanol exists in gaseous form, the distance between its molecules increases, mixing with air is more uniform, the combustion reaction is more complete, thereby improving the combustion efficiency, and the combustion of the vaporized methanol is more complete, which helps to reduce the generation of incomplete combustion products, such as formaldehyde and other harmful gases, which helps to reduce emission pollution and improve air quality. In comparison, although atomized methanol can form fine droplets, there is still a layer of liquid film on the surface of the droplets, which affects the combustion efficiency; methanol is prone to form gas blockage in liquid state, affecting the normal supply of fuel. In comparison, vaporized methanol does not have this problem and can ensure a stable supply of fuel.

[0017] Compared with the prior art scheme of cracking methanol and then burning it, the utility model can directly spray the methanol into the combustion chamber for combustion after it is gasified, without further processing or conversion like cracking, which simplifies the fuel supply system and reduces the system complexity and cost; methanol cracking requires additional energy to heat the methanol and maintain the temperature required for the cracking reaction. In comparison, the methanol gasification process has lower energy consumption and is more conducive to improving the overall energy utilization efficiency; the composition and properties of the methanol cracking products may be affected by many factors, such as cracking temperature, pressure, catalyst type, etc., so its combustion performance may fluctuate to a certain extent. In comparison, the combustion performance of gasified methanol is relatively stable and easy to control and adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the methanol gasification device of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the methanol gasification device of the utility model;

[0020] Figure 3 It is a schematic structural diagram of the kiln system of the utility model.

[0021] Description of reference numerals:

[0022] 1. Box body; 11. Smoke inlet; 12. Smoke outlet; 13. Vibration generator; 14. Dust collection drawer;

[0023] 2. Coil; 21. Liquid methanol inlet; 22. Gaseous methanol outlet; 23. Reciprocating zigzag structure; 24. Single-turn zigzag structure; 25. Liquid conveying assembly; 26. Check valve; 27. Flow control valve;

[0024] 3. Heating wire;

[0025] 4. Methanol gasification unit;

[0026] 5. Kiln;

[0027] 6. Combustion chamber;

[0028] 7. Methanol supply system;

[0029] 8. Flue gas treatment system. DETAILED DESCRIPTION

[0030] The following is a detailed description of the embodiments of the present utility model.

[0031] In this embodiment, unless otherwise clearly specified and limited, when terms such as "set on", "connected", and "connected" appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through one or more intermediate media. For those skilled in the art, the specific meanings of the above terms in this embodiment can be understood according to the specific circumstances. The directional words that appear in this embodiment are to better illustrate the characteristics of the features and the relationship between the features. It should be understood that when the placement direction of this embodiment changes, the characteristics of the features and the direction of the relationship between the features also change accordingly. Therefore, the directional words do not constitute an absolute limitation on the characteristics of the features and the relationship between the features in space, but only play a relative limitation role.

[0032] The utility model provides a methanol gasification device, such as Figure 1 and Figure 2 As shown, it includes a box body 1, a coil 2 and an electric heating wire 3; the coil 2 is arranged as a single-channel structure that is bent, coiled and ascended, the bottom port of the coil 2 is connected to a liquid methanol inlet 21, and the top port of the coil 2 is connected to a gaseous methanol outlet 22; a flue gas inlet 11 and a flue gas outlet 12 are respectively arranged on both sides of the box body 1, a flue gas heat exchange channel is formed in the box body 1, and the coil 2 is located in the flue gas heat exchange channel; the electric heating wire 3 is wound around the coil 2.

[0033] Based on the above structural setting, when in use, liquid methanol is input into the liquid methanol inlet 21, and the flue gas generated when the kiln 5 is working is input into the flue gas inlet 11. The heat of the flue gas is used to heat the methanol to gasify the methanol. The cooled flue gas is sent out from the flue gas outlet 12, and the gasified methanol is sent out from the gaseous methanol outlet 22. The device can recycle the heat of the flue gas of the kiln 5 to achieve the gasification of methanol without additional energy consumption. The use cost of the equipment is low, and the structure of the methanol gasification device is simple, and the equipment manufacturing cost is low, thereby making the equipment investment cost of the manufacturer low. In the initial stage of the start-up of the kiln 5, the flue gas temperature of the kiln 5 is low, and the low-temperature flue gas cannot meet the demand for methanol gasification. For this reason, an electric heating wire is added to the methanol gasification system. When the temperature of the flue gas is not high enough, the electric heating wire 3 is used to heat the coil 2 to gasify the methanol. When the temperature of the flue gas is high enough, the electric heating wire 3 stops working to reduce energy consumption.

[0034] In addition, compared with the traditional heat exchanger, the coil 2 of the methanol gasification device of the utility model is set as a single-channel structure, so that the length of the coil 2 is long enough, the path of methanol flowing in the coil 2 is long enough, and the methanol is heated more fully to meet the demand of converting methanol from liquid to gas. Moreover, the liquid methanol enters the coil 2 from the port located at the bottom of the coil 2, and the methanol that has not been heated to a gaseous state will be stored at the bottom of the coil 2 and continuously heated, and the methanol converted to a gaseous state will rise and be sent out. Since the higher the temperature, the lower the density, the temperature of the flue gas at the top of the box 1 is higher. The higher the temperature of the flue gas, the methanol can continue to be heated and maintain the gaseous state when it rises, so that the gasification effect of methanol is excellent.

[0035] In this embodiment, the gaseous methanol outlet 22 is located at the top corner of the box body 1 on the side close to the flue gas inlet 11, and the liquid methanol inlet 21 is located at the bottom corner of the box body 1 on the side close to the flue gas outlet 12. The temperature of the flue gas at the top corner of the side close to the flue gas inlet 11 is the highest, and arranging the gaseous methanol outlet 22 there is conducive to maintaining the temperature and gasification state of the gaseous methanol.

[0036] In this embodiment, the density of the topmost tube of the coil 2 is greater than the density of the tubes in the lower layer. Since the temperature of the flue gas at the top of the box 1 is relatively high, in order to better maintain the temperature and gasification state of the gaseous methanol, the density of the topmost tube is set higher. Preferably, with the flow direction of the flue gas in the flue gas channel as the horizontal direction, the topmost tube of the coil 2 is set as a reciprocating zigzag structure 23 composed of multiple longitudinally extending and sequentially connected tubes; the lower layer of the coil 2 is set as a single-circle zigzag structure 24.

[0037] In this embodiment, a methanol temperature sensor is provided in the gaseous methanol outlet 22, and a flue gas temperature sensor is provided in the flue gas inlet 11. The methanol temperature sensor is used to detect the temperature of the methanol output. When the output methanol temperature is insufficient, the amount of methanol fed into the coil 2 is reduced, and / or the amount of high-temperature flue gas fed into the housing 1 is increased, and / or the electric heating wire 3 is started to increase the temperature of the coil 2. The flue gas temperature sensor is used to detect the temperature of the high-temperature flue gas fed into the housing 1. When the flue gas temperature is not high enough, the electric heating wire 3 is started to increase the temperature of the coil 2, and when the flue gas temperature is high enough, the electric heating wire 3 is stopped. The methanol temperature sensor and the flue gas temperature sensor monitor the temperature of the corresponding opening in real time together, so that the control system of the peripheral device can better regulate the temperature of the coil 2.

[0038] In this embodiment, a vibration generator 13 is installed on the top plate of the box body 1, and a dust collection drawer 14 is provided at the bottom of the box body 1, which is located in the box body 1 and can be pulled out of the box body 1. During the use of the methanol gasification device, dust in the flue gas will fall to the coil 2 and accumulate on the coil 2. The accumulated dust is likely to affect the conduction of heat. For this reason, the vibration generator 13 is provided in the box body 1 in this embodiment. The vibration generator 13 drives the box body 1 to vibrate to shake off the dust, and the shaken dust is gathered in the dust collection drawer 14. The staff regularly pulls out the dust collection drawer 14 and dumps the dust.

[0039] In this embodiment, the diameter of the coil 2 is 16-20 mm, preferably 18 mm; the wall thickness is 1.8-2.5 mm, preferably 2 mm, and the material is 316 stainless steel tube. Preferably, the total length of the coil 2 is 25-35 m, more preferably 30 m. The coil 2 of the above size range can take into account the manufacturing cost while ensuring that the methanol is gasified sufficiently well.

[0040] In this embodiment, the liquid methanol inlet 21 is connected to the liquid delivery assembly 25, and a one-way valve 26 and a flow regulating valve 27 are provided between the liquid methanol inlet 21 and the liquid delivery assembly 25. The one-way valve 26 allows the liquid to flow from the liquid delivery assembly 25 to the liquid methanol inlet 21 in one direction. The liquid delivery assembly 25 preferably adopts a liquid pump, the one-way valve 26 is provided to prevent the reverse backflow of the methanol in the coil 2, and the flow regulating valve 27 is used to control the flow of the methanol delivered to the coil 2.

[0041] The utility model also provides a kiln system, such as Figure 3 As shown, it includes a kiln 5, a combustion chamber 6, a methanol supply system 7, a flue gas treatment system 8 and the above-mentioned methanol gasification device 4. A burner is arranged in the combustion chamber 6, and the combustion chamber 6 is used to heat the kiln 5; the smoke exhaust port of the kiln 5 is connected to the smoke inlet 11, the smoke outlet 12 is connected to the smoke inlet of the flue gas treatment system 8, the methanol supply system 7 is connected to the liquid methanol inlet 21, and the gaseous methanol outlet 22 is connected to the burner. When in use, the high-temperature flue gas generated by the kiln 5 is sent to the flue gas treatment system 8 for treatment after being cooled by the methanol gasification device 4, and the methanol sent by the methanol supply system 7 is sent to the burner for combustion after being gasified by the methanol gasification device 4.

[0042] This kiln system is integrated with the above-mentioned methanol gasification device 4, and utilizes the heat of the flue gas of the kiln 5, which has the benefit of energy saving and emission reduction.

[0043] In this embodiment, during operation, the temperature of the flue gas inlet 11 is 600-800°C, the temperature of the flue gas outlet 12 is 190-240°C, the temperature of the liquid methanol inlet 21 is 18-25°C, and the temperature of the gaseous methanol outlet 22 is 180-220°C.

[0044] In the absence of conflict, the above-mentioned embodiments and features thereof may be combined with each other.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the preferred technical solutions of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solutions of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the utility model.

Claims

1. A methanol gasification device, characterized in that: It comprises a box body (1), a coil (2) and an electric heating wire (3); The coil (2) is configured as a single-channel structure that bends, coils, and rises; the bottom port of the coil (2) is connected to a liquid methanol inlet (21), and the top port of the coil (2) is connected to a gaseous methanol outlet (22); A smoke inlet (11) and a smoke outlet (12) are respectively arranged on both sides of the box body (1), a smoke heat exchange channel is formed in the box body (1), and the coil (2) is located in the smoke heat exchange channel; The heating wire (3) is wound around the coil (2).

2. The methanol gasification device according to claim 1, characterized in that: The gaseous methanol outlet (22) is located at the top corner of the box body (1) on the side close to the flue gas inlet (11), and the liquid methanol inlet (21) is located at the bottom corner of the box body (1) on the side close to the flue gas outlet (12).

3. The methanol gasification device according to claim 1, characterized in that: The density of the topmost tube of the coil (2) is greater than the density of the tubes in the lower layers.

4. The methanol gasification device according to claim 3, characterized in that: With the flow direction of the smoke in the smoke channel being the horizontal direction, the topmost tube of the coil (2) is arranged as a reciprocating zigzag structure (23) composed of a plurality of tubes extending longitudinally and connected in sequence; The lower layer of the coil (2) is arranged as a single-circle zigzag structure (24).

5. The methanol gasification device according to claim 1, characterized in that: A methanol temperature sensor is arranged in the gaseous methanol outlet (22), and a flue gas temperature sensor is arranged in the flue gas inlet (11).

6. The methanol gasification device according to claim 1, characterized in that: A vibration generator (13) is installed on the top plate of the box body (1), and a dust collection drawer (14) located inside the box body (1) and capable of being drawn out of the box body (1) is arranged at the bottom of the box body (1).

7. The methanol gasification device according to claim 1, characterized in that: The diameter of the coil (2) is 16-20 mm, the wall thickness is 1.8-2.5 mm, and the material is 316 stainless steel pipe. The total length of the coil (2) is 25-35 m.

8. The methanol gasification device according to claim 1, characterized in that: The liquid methanol inlet (21) is connected to a liquid delivery assembly (25), and a one-way valve (26) and a flow regulating valve (27) are provided between the liquid methanol inlet (21) and the liquid delivery assembly (25). The one-way valve (26) allows the liquid to flow from the liquid delivery assembly (25) to the liquid methanol inlet (21) in a one-way manner.

9. A kiln system, characterized in that: It comprises a kiln (5), a combustion chamber (6), a methanol supply system (7), a flue gas treatment system (8), and a methanol gasification device (4) according to any one of claims 1 to 8, wherein a burner is arranged in the combustion chamber (6), and the combustion chamber (6) is used to heat the kiln (5); The smoke exhaust port of the kiln (5) is connected to the smoke inlet (11), the smoke outlet (12) is connected to the smoke inlet of the smoke treatment system (8), the methanol supply system (7) is connected to the liquid methanol inlet (21), and the gaseous methanol outlet (22) is connected to the burner.

10. The kiln system according to claim 9, characterized in that: During operation, the temperature of the flue gas inlet (11) is 600-800°C, the temperature of the flue gas outlet (12) is 190-240°C, the temperature of the liquid methanol inlet (21) is 18-25°C, and the temperature of the gaseous methanol outlet (22) is 180-220°C.

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