A methanol gasification device
By setting up bubble stone and cotton layers in the methanol heating system, ensuring uniform mixing of methanol and air, the problem of incomplete catalytic reaction is solved, the generation of toxic gases is reduced, and the heating efficiency and environmental protection are improved.
Patent Information
- Application Number
- CN201811507648.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2018-12-11
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2038-12-11
AI Technical Summary
In the existing methanol heating system, insufficient supply of methanol gas or air leads to incomplete catalytic reactions, which easily produces toxic gases, such as formaldehyde and CO, and the mixing state of air and methanol is difficult to ensure, resulting in incomplete catalytic methanol, affecting the production. Thermal efficiency.
A methanol gasification device was designed. By setting up bubble stone and cotton layers in the methanol gasification tank, and using multiple air input tubes and mixed gas output tubes, ensuring uniform mixing of methanol with sufficient air, accelerating methanol gasification, and The moisture absorption and breathability of the cotton layer improve the mixing degree and prevent incomplete catalytic reactions.
It effectively reduces the production of toxic gases, improves the gasification rate of methanol and the integrity of catalytic reactions, and ensures the efficient operation and environmental protection of the heating system.
Smart Images
Figure CN109404957B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of heating systems using methanol as fuel, and specifically designs a methanol gasification device applied in a heating system. Background Art
[0002] The heating system using methanol as fuel uses methanol and air under the action of a catalyst to produce a flameless catalytic combustion reaction and release heat. This heat can be transferred to the air around the heating system to achieve a heating effect, and can also be transferred to the heat medium to achieve a heating effect. This process is green and environmentally friendly, and has high heating efficiency.
[0003] The factors that affect the catalytic combustion temperature are mainly the type and proportion of catalysts, the supply of methanol gas and air. When the supply of methanol gas or air is insufficient, the catalytic reaction is incomplete, and toxic gases such as formaldehyde and CO are easily produced. The commonly used setting at present is to set a methanol tank at the bottom of the catalytic tank, and an air inlet is provided on the outer wall of the catalytic tank. The methanol in the methanol tank naturally evaporates and enters the catalytic tank, and reacts with the air entering from the air inlet under the action of the catalyst to produce a catalytic combustion reaction. In this technical solution, the gasification amount of methanol is greatly affected by temperature, and the supply of air is also unstable. Moreover, the air needs to enter the catalyst and then mix with methanol for catalytic reaction. It is difficult to ensure a uniform mixing state of methanol and air, which can easily lead to incomplete catalysis of methanol and volatilization to the outer air of the heating system. At the same time, in the catalytic reaction of methanol, the flow rate of air should be relatively slow so that methanol can completely react with it. In this technical solution, the flow rate of air cannot be controlled, and the phenomenon of incomplete methanol reaction will occur. Summary of the invention
[0004] In order to solve the above technical problems, the present invention provides a methanol gasification device, which accelerates the volatilization rate of methanol through the arrangement of air stones, cotton layers and air supply components, and ensures that methanol can be evenly mixed with a sufficient amount of air, so that the catalytic reaction of methanol in the catalytic tank is more complete, and the generation of toxic gases such as CO and formaldehyde is effectively reduced.
[0005] The technical solution provided by the present invention is as follows:
[0006] A methanol gasification device is composed of a methanol gasification tank, an air supply component, a methanol supply component and a plurality of mixed gas output pipes. The methanol gasification tank is provided with an upper cover. The plurality of mixed gas output pipes are arranged vertically in parallel with a horizontal plane and extend into the methanol gasification tank through the upper cover. The air supply component is composed of two air input pipes A, an air intake shunt pipe and a plurality of air input pipes B. The air input pipes A are respectively arranged at the two ends of the air intake shunt pipe. One end of the plurality of air input pipes B arranged in parallel is connected to the side of the air intake shunt pipe, and the other end extends into the methanol gasification tank through the upper cover. A countercurrent valve is provided on the air input pipe A. The methanol supply component is composed of a methanol inlet pipe and a methanol shunt pipe. The methanol shunt pipe is provided with a methanol inlet port and a methanol outlet port. One end of the methanol inlet pipe is connected to the methanol shunt pipe, and the other end is communicated with the inside of the methanol gasification tank through the lower side of the methanol gasification tank.
[0007] Preferably, the methanol diversion pipe is also provided with a lower pipe opening for displaying a methanol liquid level, and the upper cover is provided with an upper pipe opening for displaying a methanol liquid level, and the lower pipe opening for displaying a methanol liquid level and the upper pipe opening for displaying a methanol liquid level are connected via a transparent liquid level display tube.
[0008] More preferably, the liquid level display tube is arranged in a "∩" shape.
[0009] Preferably, among the several air input pipes B, 2 / 3 of the air input pipes B have air stones connected to their bottoms, and the air stones are located at the bottom of the methanol gasification tank.
[0010] More preferably, the methanol gasification tank is filled with a cotton layer, the bottom of the cotton layer is in contact with the air stone, a gap of 2 to 5 mm is left between the top and the upper cover, and the bottom of the air input pipe B not connected to the air stone is placed in the gap.
[0011] Preferably, the air input pipe A is connected to the air inlet diverter pipe through a three-way valve, and the other interface of the three-way valve is connected to the air outlet diverter pipe through a copper tube I. It also includes the same number of copper tubes II as the mixed gas output pipe, one end of which is connected to the side of the air inlet diverter pipe, and the other end is connected to the side of the mixed gas output pipe.
[0012] Preferably, the mixed gas output pipe consists of an output pipe A and an output pipe B, the diameter of the output pipe A is 2.5 to 3 times the diameter of the output pipe B, and the output pipe B is arranged at the top of the output pipe A.
[0013] Preferably, the length of the output tube B is greater than the length of the output tube A; and the output tube B is made of copper.
[0014] Preferably, the length of the mixed gas output pipe is 5 to 8 times the length of the air input pipe B.
[0015] Compared with the prior art, the present invention has the following technical advantages:
[0016] (1) After the air in the present invention enters the methanol gasification tank, it is divided into two paths. One path of air is transported to the bottom of the methanol gasification tank, where the air molecules are subdivided by air bubbles and output to the bottom of the methanol gasification tank. The subdivided air will evaporate from the bottom of the methanol gasification tank to the top. In this process, methanol and air are adsorbed and combined into a mixed gas, which is evaporated from the bottom of the methanol gasification tank to the top, thereby accelerating the gasification of methanol. The other path of air is transported to the top of the cotton layer in the methanol gasification tank, where it is mixed with the methanol volatilized to the top of the cotton layer to ensure that the mixed gas contains the amount of oxygen required for the catalytic reaction, thereby avoiding the phenomenon that the catalytic reaction is incomplete due to the determination of methanol.
[0017] (2) The cotton fiber in the present invention has strong moisture absorption and air permeability. During the rising process of the methanol and air mixed at the bottom of the methanol gasification tank, the resistance of the layers of cotton fibers and the dense space increase the mixing degree of the methanol and air. At the same time, the adsorption of methanol by the cotton layer can effectively prevent the methanol from flowing out after the methanol gasification tank collapses.
[0018] (3) The diameter of the output pipe B in the present invention is smaller than that of the output pipe A. During the gasification process, methanol is easily condensed into methanol liquid again. After the methanol liquid condenses in the output pipe A, it is not easy to enter the output pipe B, and most of it flows downward back to the methanol gasification tank. Even if a small amount of methanol liquid enters the output pipe B, since the length of the output pipe B is much longer than that of the output pipe A, and the output pipe B is placed perpendicular to the horizontal plane, the rising path of the methanol liquid is longer. During the rising process, it is easy to fall under the action of its gravity and flow back to the methanol gasification tank. In addition, the output pipe B is made of copper, which has excellent thermal conductivity, which can help the methanol in the pipeline fully absorb external heat to ensure that it is in a gasified state, and effectively prevent liquid methanol from entering the catalyst tank and affecting the catalytic activity of the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic diagram of the structure of the present invention
[0020] Figure 2 A schematic diagram of the structure of the present invention
[0021] Figure 3 A schematic diagram of the structure of the present invention
[0022] Figure 4 The schematic diagram of the structure of the mixed gas output pipe in the present invention is
[0023] Figure 5 The schematic diagram of the structure of the methanol gasification tank in the present invention is
[0024] Figure 6 The schematic diagram of the structure of the three-way valve in the present invention is
[0025] Wherein: 1. methanol gasification tank 2. upper cover 3. air input pipe A4. air inlet diversion pipe 5. air input pipe B6. countercurrent valve 7. three-way valve 8. valve switch 9. bubble stone 10. cotton layer 11. methanol inlet pipe 12. methanol diversion pipe 13. methanol inlet port 14. methanol outlet port 15. methanol liquid level display lower pipe port 16. copper tube II 17. liquid level display tube 18. output pipe A 19. output pipe B 20. copper tube I 21. air outlet diversion pipe. DETAILED DESCRIPTION
[0026] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.
[0027] like Figures 1 to 3 As shown, the present invention discloses a methanol gasification device, which consists of a methanol gasification tank 1, an air supply component, a methanol supply component and four mixed gas output pipes. An upper cover 2 is arranged on the methanol gasification tank 1, and metal glue is coated between the methanol gasification tank and the upper cover to prevent methanol from overflowing; the four mixed gas output pipes are arranged vertically in parallel with the horizontal plane, and extend into the methanol gasification tank 1 through the upper cover 2; the air supply component consists of two air input pipes A3, an air intake branch pipe 4 and six air input pipes B5, the length of the mixed gas output pipe is 4 to 8 times the length of the air input pipe B5, the air input pipe A3 is respectively arranged at the two ends of the air intake branch pipe 4 through a three-way valve 7, one end of the six parallel air input pipes B5 is connected to the side of the air intake branch pipe 4, and the other end extends into the methanol gasification tank 1 through the upper cover 2, wherein the bottom of the four air input pipes B5 is connected with an air bubble stone 9, and the air bubble stone 9 is located at the bottom of the methanol gasification tank 1.
[0028] The methanol gasification tank 1 is filled with a cotton layer 10, the bottom of the cotton layer 10 is in contact with the air stone 9, and a gap of 2 to 5 mm is left between the top and the upper cover 2. Two air input pipes B5 with air stones 9 connected to the bottom are placed in the gap.
[0029] The methanol supply component is composed of a methanol inlet pipe 11 and a methanol diversion pipe 12. The methanol diversion pipe 12 is provided with a methanol inlet port 13, a methanol liquid level display lower pipe port 15 and a methanol outlet port 14 (such as Figure 5 As shown in the figure, one end of the methanol inlet pipe 11 is connected to the methanol diversion pipe 12, and the other end is connected to the interior of the methanol gasification tank 1 through the lower side of the methanol gasification tank 1. The upper cover 2 is provided with a methanol liquid level display upper pipe opening (not marked in the figure), and the methanol liquid level display lower pipe opening 15 and the methanol liquid level display upper pipe opening are connected through a transparent liquid level display tube 17, and the liquid level display tube 17 is arranged in a "∩" shape.
[0030] In the present invention, if Figure 5As shown, the mixed gas output pipe consists of an output pipe A18 and an output pipe B19. The diameter of the output pipe B19 is preferably 10-15 mm, the diameter of the output pipe A18 is preferably 25-40 mm, and the output pipe B19 is arranged at the top of the output pipe A18; the length of the output pipe B19 is preferably 500-800 mm, and the length of the output pipe A18 is preferably 100 mm; the output pipe A18 is made of copper.
[0031] In the present invention, the third interface of the three-way valve 7 is connected to the gas outlet diversion pipe 21 through the copper tube I20, and four copper tubes II16 are connected in parallel to the side of the gas outlet diversion pipe 21, and the other end of the copper tube II16 is connected to the side of the output pipe A18.
[0032] In actual use, the two air pumps are connected to the two air input pipes A3 respectively, the methanol inlet 13 is connected to the methanol pump, the methanol pump is connected to the methanol storage tank, and the valve switch 8 is turned to position A (such as Figure 6 As shown), turn on the air pump, methanol pump and the switch between the mixed gas output pipe and the catalytic tank (not shown in the figure), and set the flow rate of the air pump to 35-100 ml / min, methanol enters the methanol gasification tank 1, is adsorbed by the cotton layer 10, and the methanol liquid level display position in the liquid level display tube 17 is observed. When the set requirement is met, the methanol pump is turned off; the air pumped out by the air pump passes through the countercurrent valve 6, the three-way valve 7 and the air intake diverter pipe 4 and enters the methanol gasification tank 1, wherein the air coming out of the four air input pipes B5 equipped with bubble stones 9 is adsorbed by methanol, passes through the cotton layer 10, and evaporates to the top of the methanol gasification tank 1, and the mixed gas after being evenly mixed passes through the mixed gas output pipe and enters the catalytic tank for catalytic combustion reaction. In addition, the air coming out of the two air input pipes B5 not equipped with bubble stones 9 is mixed with the methanol volatilized to the top of the methanol gasification tank 1, passes through the mixed gas output pipe, and enters the catalytic tank for catalytic combustion reaction.
[0033] When the heating system stops working, the catalytic tank needs to have a cooling process. The methanol pump is turned off and the valve switch 8 is turned to position B. The air pumped out from the air pump does not pass through the methanol gasification tank 1, but directly passes through the gas outlet diversion pipe 21 and the mixed gas output pipe to enter the catalytic tank to ensure that the remaining methanol has sufficient oxygen supply. During this process, a very small amount of vaporized methanol will enter the catalytic tank through the mixed gas output pipe, but it has no effect on the cooling of the catalytic tank. When the temperature in the catalytic tank drops to a certain range, the air pump is disconnected from the air input pipe A, and the switch between the mixed gas output pipe and the catalytic tank is closed to end the operation of the methanol gasification device.
[0034] In addition, in the present invention, methanol liquid can be added to the methanol vaporization tank 1 or methanol liquid can be sucked out from the methanol vaporization tank 1 through the methanol outflow port 14 .
Claims
1. A methanol gasification device, characterized in that: It is composed of a methanol gasification tank, an air supply component, a methanol supply component and a plurality of mixed gas output pipes. The methanol gasification tank is provided with an upper cover. The plurality of mixed gas output pipes are arranged vertically in parallel with the horizontal plane and extend into the methanol gasification tank through the upper cover. The air supply component is composed of two air input pipes A, an air intake diverter pipe and a plurality of air input pipes B. The air input pipes A are respectively arranged at the two ends of the air intake diverter pipe and connected to an air pump. One end of the plurality of air input pipes B arranged in parallel is connected to the side of the air intake diverter pipe, and the other end extends into the methanol gasification tank through the upper cover. A countercurrent valve is provided on the air input pipe A. The methanol supply component is composed of a methanol inlet pipe and a methanol diverter pipe. The methanol diverter pipe is provided with a methanol inlet port and a methanol outlet port. One end of the methanol inlet pipe is connected to the methanol diverter pipe, and the other end is communicated with the interior of the methanol gasification tank through the lower side of the methanol gasification tank. Among the plurality of air input pipes B, 2 / 3 of the air input pipes B have air bubbles connected to their bottoms, and the air bubbles are located at the bottom of the methanol gasification tank; The methanol gasification tank is filled with a cotton layer, the bottom of the cotton layer is in contact with the air stone, and a gap of 2 to 5 mm is left between the top and the upper cover, and the bottom of the air input pipe B not connected to the air stone is placed in the gap; The air input pipe A is connected to the air inlet diverter pipe through a three-way valve, and the other interface of the three-way valve is connected to the air outlet diverter pipe through a copper pipe I. It also includes the same number of copper pipes II as the mixed gas output pipe, one end of which is connected to the side of the air outlet diverter pipe, and the other end is connected to the side of the mixed gas output pipe.
2. A methanol gasification device according to claim 1, characterized in that: A methanol liquid level display lower pipe opening is also provided on the methanol diversion pipe, and a methanol liquid level display upper pipe opening is provided on the upper cover. The methanol liquid level display lower pipe opening and the methanol liquid level display upper pipe opening are connected through a transparent liquid level display pipe.
3. A methanol gasification device according to claim 2, characterized in that: The liquid level display tube is arranged in a "∩" shape.
4. A methanol gasification device according to claim 1, characterized in that: The mixed gas output pipe consists of an output pipe A and an output pipe B. The diameter of the output pipe A is 2.5 to 3 times the diameter of the output pipe B. The output pipe B is arranged at the top of the output pipe A.
5. A methanol gasification device according to claim 4, characterized in that: The length of the output tube B is greater than that of the output tube A; the output tube B is made of copper.
6. A methanol gasification device according to claim 1, characterized in that: The length of the mixed gas output pipe is 5 to 8 times the length of the air input pipe B.