A methanol premixed combustion lance device

Abstract

This utility model discloses a methanol premixed combustion nozzle device, including a liquid tank and a gas tank, both connected to an air inlet pipe; a mixing component connected to the gas outlet of the air inlet pipe; and a guide pipe connected to the mixing component and extending into the burner. The mixing component includes a mixing chamber connected to an air pump. One side of the mixing chamber is connected to the guide pipe, and the other side of the mixing chamber is connected to the gas outlet of the air inlet pipe via a gas guiding component. A gas content detector is installed on the mixing chamber and connected to a controller. An igniter is installed in the burner corresponding to the extension end of the guide pipe and is also connected to the controller. This utility model can use liquid and gaseous methanol separately, and a rotating mounting sleeve facilitates the rotary introduction of methanol gas into the mixing chamber to achieve thorough mixing with the injected air. The structure is simple and compact, and the operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of industrial burner technology, and in particular to a methanol premixed combustion spray gun device. Background Technology

[0002] Existing burners, due to their high power, require air premixing in addition to injecting air into the burner. However, with industrial development, there are more impurities in the air, which seriously affects the cycle of premixing the fuel gas to meet the combustion ratio. At the same time, directly discharging the fuel gas into the air mixing position, since the ignition position usually does not have a switching valve, can easily result in the fuel gas being discharged directly into the burner without being fully mixed, which also affects the cycle of premixing the fuel gas to meet the combustion ratio. This is especially true when methanol is used as fuel gas, as its production safety is unstable and production costs are increased. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a methanol premixed combustion spray gun device that is suitable for rapid mixing of methanol and air and improves mixing efficiency.

[0004] To solve the above-mentioned technical problems, the present invention provides a methanol premixed combustion spray gun device, comprising a liquid tank and a gas tank both connected to an air inlet pipe, a mixing component connected to the air outlet of the air inlet pipe, and a guide pipe connected to the mixing component and extending into the burner. The mixing component includes a mixing chamber connected to a gas pump. One side of the mixing chamber is connected to the guide pipe, and the other side of the mixing chamber is connected to the air outlet of the air inlet pipe via a gas guide component. A gas content detector is provided on the mixing chamber and is connected to a controller. An igniter is provided at the extension end of the guide pipe and is also connected to the controller.

[0005] The above structure includes a liquid tank and a gas tank, controlled by a first and a second switching valve, allowing for the use of liquid methanol and gaseous methanol as fuel inputs respectively. During operation, air is introduced into the mixing chamber of the mixing assembly, and methanol gas is introduced into the mixing chamber via a gas guiding assembly. The introduced methanol gas mixes rapidly with the air, and to a certain extent, the rapid discharge of methanol gas into the guide pipe is impeded to avoid reducing mixing efficiency. When the gas content detector detects that the gas combustion ratio meets the preset value, it sends a signal to the controller, which then promptly sends an activation command to the igniter to ignite the methanol-gas mixture output from the guide pipe to heat the burner. The structure is simple and compact, and easy to use.

[0006] To facilitate the rapid supply of methanol gas, preferably, an outlet pipe connected to the inlet pipe is provided at the outlet end of the liquid tank, a first switch valve is provided on the outlet pipe, an electric heating tube is sleeved on the outside of the outlet pipe, and a pressure gauge is inserted into one side of the outlet pipe; a second switch valve is provided between the inlet pipe and the gas tank.

[0007] To facilitate the guided input of methanol gas, the gas guiding assembly preferably includes a mounting sleeve that rotates through the wall of the mixing tank and a flow splitting mechanism located on one side of the insertion end of the mounting sleeve, with the outlet end of the inlet pipe extending into the other side of the mounting sleeve.

[0008] To simplify the installation structure and prevent methanol leakage, the mounting sleeve is preferably a conical structure. The large-diameter end of the conical structure is located outside the mixing chamber, and the small-diameter end of the conical structure passes through the mixing chamber and is connected to the flow divider. A bearing is fixed on the inner wall of the large-diameter end of the mounting sleeve, and a positioning ring is provided on the inner wall of the small-diameter end of the mounting sleeve. A sealing ring is embedded in the inner wall of the positioning ring. The outlet end of the air inlet pipe passes through the middle of the bearing, and the outlet end of the air inlet pipe passes through the positioning ring and is sleeved with the sealing ring.

[0009] To facilitate the rotation of the mounting sleeve and simplify the installation structure, preferably, a power motor is fixedly mounted on the outer wall of the mixing box, an active tooth is provided at the output end of the power motor, and a toothed ring that meshes with the active tooth is fixedly wound on the outer wall of the large diameter end of the mounting sleeve.

[0010] To facilitate guiding methanol gas into the mixing chamber at multiple points, preferably, the diversion mechanism includes a diversion sleeve that is fitted onto the small-diameter end of the mounting sleeve and connected to the inlet pipe. A plurality of first oblique holes are connected to one side of the diversion sleeve, and a plurality of second oblique holes are connected to the other side of the diversion sleeve. The included angle between the inclined surfaces of the first oblique holes and the second oblique holes is 60°.

[0011] To facilitate the filtration of impurities in the air and to make it easier to clean and replace the filter box, preferably, an air guide pipe is provided between the air pump and the mixing box, the filter box is provided inside the air guide pipe, and a pipe cover is provided on the air guide pipe at the position corresponding to the filter box.

[0012] To facilitate the placement of the filter box and simplify the installation structure, preferably, a first baffle and a second baffle are screwed into the air duct, the filter box is placed between the two baffles, and the outer wall of the filter box abuts and limits the movement of the baffle at the corresponding end.

[0013] To improve the efficiency of gas mixing, preferably, the outlet end of the gas guide pipe extends into the mixing chamber, and the outlet end of the gas guide pipe is obliquely downward and oriented towards the axial center line of the inlet pipe.

[0014] To facilitate the flow of the mixed gas, preferably, the inner wall of the mixing box on the side corresponding to the connection position of the guide pipe is designed as a sloping structure that is wider on the inside and narrower on the outside.

[0015] Beneficial effects: This utility model can use both liquid and gaseous methanol, and is equipped with a rotating mounting sleeve to facilitate the rotary introduction of methanol gas into the mixing box, so as to achieve the purpose of thorough mixing with the injected air. It has a simple and compact structure and is easy to operate. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the external structure of this utility model.

[0017] Figure 2 for Figure 1 The left view.

[0018] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0019] Figure 4 for Figure 3 Enlarged view of point A in the image.

[0020] Figure 5 for Figure 3 Enlarged view of point B in the image.

[0021] The meanings of the labels in the attached diagram are as follows: Inlet pipe-10; Liquid tank-11; Liquid outlet pipe-110; Electric heating element-111; Gas tank-12; Pressure gauge-120; Flow guide pipe-13; Burner-2; Ignition device-20; Mixing box-3; Mounting sleeve-30; Bearing-31; Positioning ring-32; Sealing ring-321; Power motor-33; Drive gear-34; Gear ring-35; Gas content detector-36; Diverter sleeve-4; First oblique hole-401; Second oblique hole-402; First switch valve-51; Second switch valve-52; Air pump-6; Air guide pipe-60; First baffle-601; Second baffle-602; Filter box-61; Pipe cap-62. Detailed Implementation

[0022] Depend on Figures 1 to 5As shown, this utility model includes a liquid tank 11 and a gas tank 12, both connected to the air inlet pipe 10; a mixing assembly connected to the air outlet of the air inlet pipe 10; and a guide pipe 13 connected to the mixing assembly and extending into the burner 2. The mixing assembly includes a mixing chamber 3 connected to the air pump 6. One side of the mixing chamber 3 is connected to the guide pipe 13, and the other side of the mixing chamber 3 is connected to the air outlet of the air inlet pipe 10 via the air guide assembly. A gas content detector 36 is provided on the mixing chamber 3, and the gas content detector 36 is connected to a controller (not shown). An igniter 20 is provided at the extension end of the guide pipe 13, and the igniter 20 is also connected to the controller. The controller used here is preferably a PLC controller.

[0023] Specifically, an outlet pipe 110 is connected to the outlet end of the liquid tank 11 and is connected to the air inlet pipe 10. A first switch valve 51 is connected to the outlet pipe 110. An electric heating tube 111 is sleeved on the outside of the outlet pipe 110. A pressure gauge 120 is inserted into one side of the outlet pipe 110. A second switch valve 52 is connected between the air inlet pipe 10 and the gas tank 12.

[0024] The air guiding assembly includes a mounting sleeve 30 that is rotatably mounted on the wall of the mixing chamber 3 and a flow-dividing mechanism disposed on one side of the insertion end of the mounting sleeve 30. The outlet end of the air inlet pipe 10 extends into the other side of the mounting sleeve 30. The mounting sleeve 30 is a conical structure, with the large-diameter end of the conical structure located on the outside of the mixing chamber 3 and the small-diameter end of the conical structure inserted into the mixing chamber 3 and connected to the flow-dividing mechanism. A power motor 33 is fixedly mounted on the outer wall of the mixing chamber 3, and an active tooth 34 is provided at the output end of the power motor 33. A toothed ring 35 that meshes with the active tooth 34 is fixedly wound around the outer wall of the large-diameter end of the mounting sleeve 30.

[0025] A bearing 31 is fixed on the inner wall of the large diameter end of the mounting sleeve 30, and a positioning ring 32 is provided on the inner wall of the small diameter end of the mounting sleeve 30. A sealing ring 321 is embedded in the inner wall of the positioning ring 32. The outlet end of the air inlet pipe 10 passes through the middle of the bearing 31, and the outlet end of the air inlet pipe 10 passes through the positioning ring 32 and is sleeved with the sealing ring 321.

[0026] The diversion mechanism includes a diversion sleeve 4 that is sleeved with the small-diameter end of the mounting sleeve 30 and connected to the intake pipe 10. A plurality of first oblique holes 401 are connected to one side of the diversion sleeve 4, and a plurality of second oblique holes 402 are connected to the other side of the diversion sleeve 4. The included angle between the inclined surfaces of the first oblique holes 401 and the second oblique holes 402 is 60°.

[0027] An air guide pipe 60 is provided between the air pump 6 and the mixing box 3. A filter box 61 is provided inside the air guide pipe 60. A first baffle 601 and a second baffle 602 are screwed and fixed inside the air guide pipe 60. The filter box 61 is placed between the two baffles, and the outer wall of the filter box 61 abuts and limits the corresponding baffle. A pipe cover 62 is provided on the air guide pipe 60 at the position corresponding to the filter box 61.

[0028] The outlet end of the air guide pipe 60 extends into the mixing box 3, and the inlet end of the air guide pipe 60 is obliquely downward and faces the axial center line of the air inlet pipe 10.

[0029] The inner wall of the mixing box 3 on the side corresponding to the connection position of the guide pipe 13 is designed with a sloping structure that is wider on the inside and narrower on the outside.

[0030] The working principle of this utility model is as follows: like Figure 1 As shown, before use, only the air pump 6 is turned on, and air enters the mixing box 3 through the air guide pipe 60. The filter box 61 also filters the air, preventing impurities from entering the mixing box 3. The air entering the mixing box 3, with the help of air pressure, can discharge the gas that was previously left in the mixing box 3 into the burner 2 through the guide pipe 13. Similarly, at this time, the corresponding exhaust port (not shown) on the burner 2 is also opened, which also discharges the residual gas in the burner 2, so as to avoid the residual gas in the burner 2 affecting the efficiency of methanol ignition. After the air is discharged for a period of time, on the premise that there is no residual gas in the burner 2, the exhaust port of the burner 2 and the air pump 6 are turned off.

[0031] Example 1 like Figures 1 to 5 As shown, when using it, taking the use of liquid methanol as fuel as an example, close the second switch valve 52, first turn on the electric heating tube 111, and then turn on the first switch valve 51. The methanol in the liquid tank 11 flows into the liquid outlet pipe 110. After the liquid methanol is released from the liquid tank 11, it first depressurizes and then converts into a gaseous state. Since the electric heating tube 111 has preheated the liquid outlet pipe 110 beforehand, the gaseous methanol can maintain a constant temperature in the liquid outlet pipe 110 before reaching the boiling point. At the same time, the pressure gauge 120 can monitor the pressure value in the pipe after the liquid is converted into gas, ensuring the safety of gas transmission at the gas inlet.

[0032] At the same time, the power motor 33 and the air pump 6 are also turned on. The active gear 34 drives the meshing gear ring 35 to rotate synchronously. Since the active gear 34 is fixedly wrapped around the outer side wall of the large diameter end of the mounting sleeve 30, it drives the mounting sleeve 30 to rotate synchronously. In this process, since the bearing 31 is fixed on the inner side wall of the large diameter end of the mounting sleeve 30, and the positioning ring 32 is provided on the inner side wall of the small diameter end of the mounting sleeve 30, a sealing ring 321 is embedded in the inner wall of the positioning ring 32. The outlet end of the air inlet pipe 10 passes through the middle of the bearing 31, and the outlet end of the air inlet pipe 10 passes through the positioning ring 32 and is sleeved with the sealing ring 321. The methanol converted into gaseous state flows to the position of the mounting sleeve 30 through the air inlet pipe 10. Therefore, the rotation of the mounting sleeve 30 will not drive the air inlet pipe 10 to move. At the same time, it can also prevent methanol gas from leaking back out of the mixing box 3 from the position of the positioning ring 32 under pressure, thus providing a safety guarantee for the surrounding environment.

[0033] The diversion sleeve 4, which is fitted with the mounting sleeve 30, also rotates synchronously. When the methanol gas reaches the position of the diversion sleeve 4 through the inlet pipe 10, it simultaneously enters the mixing box 3 obliquely through several first oblique holes 401 and second oblique holes 402. Simultaneously, under the condition of rotation, the methanol gas entering the mixing box 3 forms several spiral airflows (such as...). Figure 3 The state shown by the dotted line (to avoid being too complicated, only the spiral airflow pattern generated by the rotating oblique holes at the outermost and innermost positions is shown) is shown. The air entering the mixing box 3 from the air guide pipe 60 directly rushes obliquely towards the spirally flowing methanol gas, forming an impact-type mixing state. On the one hand, it can improve the mixing efficiency of methanol and air, and on the other hand, it can effectively prevent the methanol gas from directly entering the burner 2 through the guide pipe 13. The methanol gas mixed by the impact gradually fills the mixing box 3, and at the same time, it gradually enters the guide pipe 13 and then the burner 2 along the oblique surface with a wider inner side and a narrower outer side on the inner wall of the mixing box 3.

[0034] During this process, when the gas content detector 36 detects that the methanol mixing ratio has reached the preset value required for combustion, it sends a signal to the PLC controller, and the PLC controller sends a command to the igniter 20 to start ignition. The igniter 20 ignites the methanol mixture flowing into the guide pipe 13 to heat the burner 2.

[0035] When the burner 2 is to be stopped, first close the first switch valve 51 to stop the supply of methanol. After the ignition position of the guide pipe 13 is extinguished, the gas pump 6 can be turned off. This can effectively prevent deflagration at the ignition position of the guide pipe 13 and ensure the safe use of the burner 2.

[0036] Example 2 like Figure 1As shown, unlike Example 1, when using gaseous methanol as fuel, the first switch valve 51 is closed first. At this time, the electric heating tube 111 is not turned on. The second switch valve 52 is turned on directly. The gaseous methanol in the gas tank 12 directly enters the air inlet pipe 10 and flows into the mixing box 3 through the diversion sleeve 4 for gas premixing. The subsequent operations are the same as the relevant steps in Example 1, and will not be repeated here.

[0037] It should be noted that, as Figure 3 and Figure 5 As shown, while using the air pump 6, it is also necessary to check the air quality. Before each use, the handle (not marked) should be pulled to open the pipe cover 62 to check the condition of the filter box 61. If it needs to be replaced or cleaned, it should be removed and handled in time. Since the first baffle 601 and the second baffle 602 are screwed to the installation position of the filter box 61, the filter box 61 only needs to be placed between the two baffles and the outer wall of the filter box 61 should abut against the baffle at the corresponding end to achieve the installation and positioning. It is also easy to remove it from between the two baffles.

[0038] In addition, in order to facilitate the removal of the air guide tube 60 from the filter box 61, the cross-sectional shape of the air guide tube 60 is rectangular to avoid interference during removal.

Claims

1. A methanol premixed combustion spray gun device, characterized in that: The system includes a liquid tank (11) and a gas tank (12) both connected to the air inlet pipe (10), a mixing assembly connected to the air outlet of the air inlet pipe (10), and a guide pipe (13) connected to the mixing assembly and extending into the burner (2). The mixing assembly includes a mixing chamber (3) connected to the air pump (6). One side of the mixing chamber (3) is connected to the guide pipe (13), and the other side of the mixing chamber (3) is connected to the air outlet of the air inlet pipe (10) by the gas guide assembly. A gas content detector (36) is provided on the mixing chamber (3), and the gas content detector (36) is connected to the controller. An igniter (20) is provided at the extension end of the guide pipe (13), and the igniter (20) is also connected to the controller.

2. The methanol premixed combustion spray gun device as described in claim 1, characterized in that: A liquid outlet pipe (110) is connected to the liquid outlet end of the liquid tank (11) and is connected to the air inlet pipe (10). A first switch valve (51) is connected to the liquid outlet pipe (110). An electric heating tube (111) is sleeved on the outside of the liquid outlet pipe (110). A pressure gauge (120) is inserted on one side of the liquid outlet pipe (110). A second switch valve (52) is connected between the air inlet pipe (10) and the gas tank (12).

3. The methanol premixed combustion spray gun device as described in claim 2, characterized in that: The air guiding assembly includes a mounting sleeve (30) that is rotatably mounted on the wall of the mixing box (3) and a diversion mechanism located on one side of the insertion end of the mounting sleeve (30). The outlet end of the air inlet pipe (10) extends into the other side of the mounting sleeve (30).

4. The methanol premixed combustion spray gun device as described in claim 3, characterized in that: The mounting sleeve (30) is a conical structure. The large diameter end of the conical structure is located outside the mixing box (3). The small diameter end of the conical structure is inserted into the mixing box (3) and connected to the diversion mechanism. A bearing (31) is fixed on the inner wall of the large diameter end of the mounting sleeve (30). A positioning ring (32) is provided on the inner wall of the small diameter end of the mounting sleeve (30). A sealing ring (321) is embedded in the inner wall of the positioning ring (32). The outlet end of the air inlet pipe (10) passes through the middle of the bearing (31). The outlet end of the air inlet pipe (10) passes through the positioning ring (32) and is sleeved with the sealing ring (321).

5. The methanol premixed combustion spray gun device as described in claim 3, characterized in that: A power motor (33) is fixedly mounted on the outer wall of the mixing box (3), and an active tooth (34) is provided at the output end of the power motor (33). A toothed ring (35) that meshes with the active tooth (34) is fixedly wound on the outer wall of the large diameter end of the mounting sleeve (30).

6. The methanol premixed combustion spray gun device as described in claim 3, characterized in that: The diversion mechanism includes a diversion sleeve (4) that is sleeved with the small-diameter end of the mounting sleeve (30) and connected to the air intake pipe (10). A plurality of first oblique holes (401) are connected to one side of the diversion sleeve (4), and a plurality of second oblique holes (402) are connected to the other side of the diversion sleeve (4). The included angle between the inclined surfaces of the first oblique holes (401) and the second oblique holes (402) is 60°.

7. The methanol premixed combustion spray gun device as described in claim 6, characterized in that: An air guide pipe (60) is provided between the air pump (6) and the mixing box (3). A filter box (61) is provided inside the air guide pipe (60). A pipe cover (62) is provided on the air guide pipe (60) at the position corresponding to the filter box (61).

8. The methanol premixed combustion spray gun device as described in claim 7, characterized in that: A first baffle (601) and a second baffle (602) are screwed into the air duct (60). The filter box (61) is placed between the two baffles, and the outer wall of the filter box (61) abuts against and limits the corresponding baffle.

9. The methanol premixed combustion spray gun device as described in claim 7, characterized in that: The outlet end of the air guide pipe (60) extends into the mixing box (3), and the inlet end of the air guide pipe (60) is set obliquely downward and toward the axial center line of the air inlet pipe (10).

10. The methanol premixed combustion spray gun device as described in claim 6, characterized in that: The inner wall of the mixing box (3) on the side corresponding to the connection position of the guide pipe (13) is a sloping structure with a wider inner surface and a narrower outer surface.

Images