Methanol boiler flue gas waste heat recovery device

Abstract

The utility model relates to the technical field of methanol boiler heat supply, and particularly discloses a methanol boiler flue gas waste heat recovery device which comprises a smoke exhaust pipe, a smoke inlet pipe and a discharge pipe and further comprises a heating cylinder, the heating cylinder is installed in the smoke exhaust pipe through a connecting frame, the heating cylinder is connected with a water inlet pipe and a water outlet pipe respectively, and the water inlet pipe and the water outlet pipe are connected with a water inlet pipe and a water outlet pipe respectively. The water inlet pipe and the water outlet pipe penetrate through the smoke exhaust pipe; one end of the exhaust pipe is connected with the heating cylinder, and the other end of the exhaust pipe penetrates through the smoke exhaust pipe and is connected with a methanol feeding pipe on the methanol boiler. According to the utility model, through flue gas waste heat recovery, the speed of methanol entering the boiler can be increased, the atomization effect of the methanol is improved, the methanol can be combusted more fully when entering the boiler, and hot water can be discharged into a heat supply pipeline, so that the utilization rate of flue gas waste heat recovery is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of methanol boiler heating, in particular to a methanol boiler flue gas waste heat recovery device. Background Art

[0002] A methanol boiler is a boiler that uses methanol as fuel and is mainly used to heat water into hot water or steam.

[0003] Currently, methanol produces flue gas after combustion. This flue gas contains a certain amount of waste heat, and if it is directly discharged, it will cause energy waste. To address the above technical issues, the applicant has retrieved some existing technologies to achieve the recovery and utilization of flue gas waste heat. For example, patent publication number CN213840983U has the following main technical means: an opening mechanism that relies on pressure regulation is set in the flue gas discharge path of the methanol furnace, a collection pipe is set at the inlet end of the flue gas discharge tube, and a heat conduction pipe is set in the collection pipe to conduct heat. A heated fluid medium connected to the opening mechanism is also set in the collection pipe to provide pressure control to adjust the opening mechanism. The opening mechanism can control the accumulation of heat in the throttling flue gas discharge, and can also affect the impeller to adjust its speed and drive the pump to adjust the heat flow in the heat accumulation area, thereby promoting the recovery and utilization of the flue gas discharge waste heat. After analysis by the applicant, the disadvantage of this technical solution is that the flue gas waste heat in the above solution is only used for water heating after recovery, resulting in a low utilization rate. Utility Model Content

[0004] The purpose of the utility model is to provide a methanol boiler flue gas waste heat recovery device to address the deficiencies of the existing technology and to solve the technical problem of low flue gas waste heat recovery efficiency.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A methanol boiler flue gas waste heat recovery device comprises a flue gas exhaust pipe, a flue gas inlet pipe and a discharge pipe, and the device further comprises:

[0007] A heating cylinder, which is installed inside the smoke exhaust pipe through a connecting frame. The heating cylinder is connected to a water inlet pipe and a water outlet pipe, respectively. The water inlet pipe and the water outlet pipe both pass through the smoke exhaust pipe.

[0008] An exhaust pipe, one end of which is connected to the heating cylinder, and the other end of which passes through the exhaust pipe and is connected to the methanol feed pipe on the methanol boiler.

[0009] As a preferred embodiment of the above technical solution, the exhaust pipe includes:

[0010] Connecting pipe 1, one end of which is connected to the heating cylinder;

[0011] The box body, the other end of the connecting pipe is connected to one side of the box body;

[0012] A blower fan is installed in the box body;

[0013] Connecting pipe 2, one end of the connecting pipe 2 is connected to the other side of the box body, and the other end of the connecting pipe 2 is connected to the methanol feed pipe on the methanol boiler.

[0014] As a preferred embodiment of the above technical solution, an accelerator is installed at one end of the connecting tube connected to the heating cylinder.

[0015] As a preferred embodiment of the above technical solution, an inner cylinder is provided on the inner wall of the heating cylinder, a liquid storage cavity is provided in the inner cylinder, and heat transfer oil is stored in the liquid storage cavity.

[0016] As a preferred embodiment of the above technical solution, solenoid valves are installed on both the water inlet pipe and the water outlet pipe.

[0017] As a preferred embodiment of the above technical solution, a liquid level sensor and a temperature sensor are respectively installed in the heating cylinder, and the liquid level sensor, temperature sensor and solenoid valve are all connected to an external control unit.

[0018] As a preferred embodiment of the above technical solution, a filter plate is provided in the smoke exhaust pipe, and the filter plate is located between the exhaust pipe and the heating cylinder.

[0019] The beneficial effects of the utility model are:

[0020] 1. In the present invention, the flue gas waste heat recovery can not only increase the rate at which methanol enters the boiler, improve the atomization effect of methanol, and make the methanol burn more fully when entering the boiler, but also heat water and discharge it into the heating pipe, thus improving the utilization rate of flue gas waste heat recovery;

[0021] 2. In the present invention, by providing a blower fan and an accelerator, the steam is accelerated by the accelerator, thereby accelerating the rate of steam discharged from the connecting pipe 1, accelerating the rotation speed of the blower fan, accelerating the rate of gas blown out by the blower fan, and further making the blown gas reach the atomizing device at a faster rate, thereby further accelerating the rate at which methanol enters the boiler, further improving the atomization effect of methanol, making the methanol more fully burned when entering the boiler, and further improving the utilization rate of methanol;

[0022] 3. In the present invention, by designing the heating cylinder and the inner cylinder to be hollow, the flue gas can pass through the center of the inner cylinder, so that the water is heated by the flue gas temperature and is also heated by the heat transfer oil for a second time, so that the water can be heated quickly, further improving the heating efficiency, thereby increasing the amount of steam generated, thereby indirectly improving the atomization effect of methanol, making the methanol more fully burned when entering the boiler, and further improving the utilization rate of methanol. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0024] Figure 2 Schematic diagram of the internal structure of the heating tube.

[0025] In the picture:

[0026] 1. Smoke exhaust pipe; 2. Smoke inlet pipe; 3. Discharge pipe; 4. Connecting frame; 5. Heating cylinder; 51. Heating chamber; 6. Inner cylinder; 61. Liquid storage chamber; 7. Water inlet pipe; 8. Water outlet pipe; 9. Exhaust pipe; 91. Connecting pipe 1; 92. Box body; 921. Blower fan; 93. Connecting pipe 2; 94. Accelerator; 10. Filter plate; 11. Solenoid valve; 12. Liquid level sensor; 13. Temperature sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0028] Example

[0029] like Figure 1-Figure 2 As shown, a methanol boiler flue gas waste heat recovery device includes a flue gas exhaust pipe 1, a flue gas inlet pipe 2 and a discharge pipe 3, and the device also includes:

[0030] The heating cylinder 5 is installed inside the exhaust pipe 1 through the connecting frame 4. The heating cylinder 5 is connected to the water inlet pipe 7 and the water outlet pipe 8 respectively. The water inlet pipe 7 and the water outlet pipe 8 both pass through the exhaust pipe 1.

[0031] The exhaust pipe 9 has one end connected to the heating tube 5 and the other end passing through the exhaust pipe 1 and connected to the methanol feed pipe on the methanol boiler.

[0032] In one case of this embodiment, the heating tube 5 is in a hollow cylindrical shape, and a heating chamber 51 is opened in the heating tube 5 . Water is added to the heating chamber 51 through the water inlet pipe 7 and water is discharged through the water outlet pipe 8 .

[0033] In actual application of this embodiment, the flue gas generated by methanol combustion enters the flue gas exhaust pipe 1 through the flue gas inlet pipe 2. The flue gas contacts the heating cylinder 5 to heat the water in the heating chamber 51. The water generates steam during the slow heating process, and the steam enters the exhaust pipe 9. Since the existing methanol boiler feed pipe is equipped with an atomizing device, when the steam reaches the atomizing device, the rate at which the methanol enters the boiler is accelerated, and the atomization effect of the methanol is improved. This makes the methanol more fully combusted when entering the boiler, thereby improving the utilization rate of the methanol.

[0034] After being heated to a certain temperature, the water in the heating cylinder 5 is discharged from the water outlet pipe 8 into the heating pipe, and the water heated by the methanol boiler itself is discharged into the heating pipe, thereby improving the heating efficiency;

[0035] Flue gas waste heat recovery can not only increase the rate at which methanol enters the boiler, improve the atomization effect of methanol, and make methanol burn more fully when entering the boiler, thereby increasing the utilization rate of methanol, but also heat water and discharge it into the heating pipe. In combination with the water heated by the methanol boiler itself, the water discharged into the heating pipe improves the heating efficiency.

[0036] The center of the heating tube 5 is hollow, so that the flue gas with residual heat can pass through the outside of the heating tube 5 and the center of the heating tube 5. This increases the contact area between the flue gas and the heating tube 5, and makes the water in the heating tube 5 heat up quickly, thereby increasing the heating rate and increasing the amount of steam generated. This indirectly improves the atomization effect of methanol, making the methanol more fully burned when entering the boiler, and further improving the utilization rate of methanol.

[0037] Furthermore, the exhaust pipe 9 includes:

[0038] Connecting tube 1 91, one end of which is connected to the heating tube 5;

[0039] The box body 92, the other end of the connecting tube 91 is connected to one side of the box body 92;

[0040] Blower fan 921, a blower fan 921 is installed in the box body 92;

[0041] Connecting pipe 2 93 , one end of connecting pipe 2 93 is connected to the other side of box body 92 , and the other end of connecting pipe 2 93 is connected to the methanol feed pipe on the methanol boiler.

[0042] In one case of this embodiment, the position where the connecting pipe 91 connects to the box body 92 is located above the center line of the blower fan 921, so that the steam discharged from the connecting pipe 91 impacts the corresponding fan blades in the upper half of the blower fan 921.

[0043] In actual application of this embodiment, steam enters the box body 92 through the connecting pipe 1 91, thereby blowing the blower fan 921 to rotate. After the blower fan 921 rotates, it blows air into the connecting pipe 2 93. When the blown gas moves to the atomization device, it accelerates the rate at which methanol enters the boiler and improves the atomization effect of methanol, so that the methanol can be burned more fully when entering the boiler, further improving the utilization rate of methanol.

[0044] Furthermore, an accelerator 94 is installed at one end of the connecting tube 91 connected to the heating tube 5.

[0045] In one case of this embodiment, the accelerator 94 can be a nozzle with a gradually decreasing inner diameter of the nozzle hole, the end with a larger hole diameter is located in the heating tube 5, and the end with a smaller hole diameter is connected to the connecting pipe 91.

[0046] In actual application of this embodiment, steam passes through the accelerator 94, enters from the end with a larger aperture, and is ejected from the end with a smaller aperture. This increases the rate at which steam enters the connecting pipe 91, thereby accelerating the rate at which steam is discharged from the connecting pipe 91, accelerating the speed at which the blower fan 921 rotates, and accelerating the rate at which the gas blown out of the blower fan 921 reaches the atomizing device. This further accelerates the rate at which methanol enters the boiler, further improves the atomization effect of methanol, makes the methanol burn more fully when entering the boiler, and further improves the utilization rate of methanol.

[0047] like Figure 1-Figure 2 As shown in FIG. 1 , as a preferred embodiment of the present invention, an inner cylinder 6 is provided on the inner wall of the heating cylinder 5 , a liquid storage cavity 61 is provided in the inner cylinder 6 , and heat transfer oil is stored in the liquid storage cavity 61 .

[0048] In one case of this embodiment, the center of the inner tube 6 is hollow, and smoke can pass through the center of the inner tube 6 .

[0049] In actual application of this embodiment, the flue gas passes through the center of the inner tube 6, thereby heating the heat-conducting oil in the liquid storage chamber 61. The heated heat-conducting oil then transfers heat to the water in the heating tube 5, so that the water can be heated quickly, further improving the heating efficiency, thereby increasing the amount of steam generated, thereby indirectly improving the atomization effect of methanol, making the methanol more fully burned when entering the boiler, and further improving the utilization rate of methanol.

[0050] like Figure 2 As shown, as a preferred embodiment of the present invention, solenoid valves 11 are installed on both the water inlet pipe 7 and the water outlet pipe 8 .

[0051] Furthermore, a liquid level sensor 12 and a temperature sensor 13 are respectively installed in the heating cylinder 5 , and the liquid level sensor 12 , the temperature sensor 13 and the solenoid valve 11 are all connected to an external control unit.

[0052] In one case of this embodiment, the solenoid valve 11, the liquid level sensor 12 and the temperature sensor 13 are all existing technologies, and this application does not improve them. Therefore, there is no need to disclose their specific mechanical structure and circuit structure, and it does not affect the integrity of this application; wherein, the external control unit controls the switching of the two solenoid valves 11, and the external control unit can be a mobile phone APP or a computer control terminal.

[0053] In actual application of this embodiment, the liquid level sensor 12 detects the liquid level in the heating tube 5, so that the liquid level in the heating tube 5 is always below the connecting pipe 91 to prevent water from entering the connecting pipe 91. A standard water level is set in the heating tube 5. When water is added to the heating tube 5, when the liquid level sensor 12 detects that the water level in the heating tube 5 reaches the standard water level, the signal is transmitted to the external control unit, and the external control unit controls the solenoid valve 11 on the water inlet pipe 7 to close; the temperature sensor 13 detects the temperature of the water in the heating tube 5. When the temperature of the water reaches a temperature suitable for heating, the signal is transmitted to the external control unit, and the external control unit controls the solenoid valve 11 on the water outlet pipe 8 to open, thereby discharging the heated water into the heating pipe. When the water in the heating tube 5 is drained, the solenoid valve 11 on the water outlet pipe 8 is controlled to close, and the solenoid valve 11 on the water inlet pipe 7 is controlled to open to add water to the heating tube 5.

[0054] like Figure 1 As shown, as a preferred embodiment of the present invention, a filter plate 10 is provided in the exhaust pipe 1 , and the filter plate 10 is located between the exhaust pipe 3 and the heating cylinder 5 .

[0055] In one aspect of this embodiment, the filter plate 10 may be composed of a particle filter and an activated carbon layer.

[0056] In actual application of this embodiment, since the flue gas generated after the combustion of methanol contains carbon dioxide or fine dust particles, if it is directly discharged, it may cause environmental pollution. After the flue gas enters the exhaust pipe 1, it is filtered through the filter plate 10, and the carbon dioxide and fine dust particles in the flue gas are filtered out, so that the discharged flue gas is not likely to cause pollution to the atmosphere.

[0057] Working principle: Before use, connect the smoke inlet pipe 2 to the smoke exhaust pipe on the methanol boiler, and then add water to the heating cylinder 5 through the water inlet pipe 7. When the methanol boiler is working, the smoke enters the smoke exhaust pipe 1 through the smoke inlet pipe 2. The smoke contacts the heating cylinder 5 and heats the water in the heating chamber 51, causing the heated water to generate steam. The steam enters the box body 92 through the connecting pipe 1 91 and blows the blower fan 921 to rotate. After the blower fan 921 rotates, it blows air into the connecting pipe 2 93. When the blown gas moves to the atomizing device, it accelerates the The rate at which methanol enters the boiler is increased, and at the same time, the atomization effect of methanol is improved, so that methanol is more fully burned when entering the boiler, thereby improving the utilization rate of methanol; when the water in the heating chamber 51 is heated to a temperature that can reach the heating temperature, the heated water is discharged into the heating pipe through the outlet pipe 8, and the water heated by the methanol boiler itself is discharged into the heating pipe, thereby improving the heating efficiency; the flue gas is filtered by the filter plate 10 before being discharged, filtering out carbon dioxide and fine dust particles in the flue gas, so that the discharged flue gas is not easy to pollute the atmosphere.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A methanol boiler flue gas waste heat recovery device, comprising a flue gas exhaust pipe (1), a flue gas inlet pipe (2) and a discharge pipe (3), characterized in that: The device further comprises: A heating cylinder (5), the heating cylinder (5) being installed inside the smoke exhaust pipe (1) via a connecting frame (4), the heating cylinder (5) being respectively connected to a water inlet pipe (7) and a water outlet pipe (8), the water inlet pipe (7) and the water outlet pipe (8) both passing through the smoke exhaust pipe (1); An exhaust pipe (9), one end of which is connected to the heating cylinder (5), and the other end of which passes through the smoke exhaust pipe (1) and is connected to the methanol feed pipe on the methanol boiler.

2. The methanol boiler flue gas waste heat recovery device according to claim 1, characterized in that: The exhaust pipe (9) comprises: A connecting pipe (91), one end of which is connected to the heating cylinder (5); The box body (92), the other end of the connecting pipe (91) is connected to one side of the box body (92); A blower fan (921), wherein the box body (92) is provided with a blower fan (921); A second connecting pipe (93), one end of which is connected to the other side of the box body (92), and the other end of which is connected to the methanol feed pipe on the methanol boiler.

3. The methanol boiler flue gas waste heat recovery device according to claim 2, characterized in that: An accelerator (94) is installed at one end of the connecting pipe (91) connected to the heating cylinder (5).

4. The methanol boiler flue gas waste heat recovery device according to claim 1, characterized in that: An inner cylinder (6) is provided on the inner wall of the heating cylinder (5), a liquid storage cavity (61) is provided in the inner cylinder (6), and heat transfer oil is stored in the liquid storage cavity (61).

5. The methanol boiler flue gas waste heat recovery device according to claim 1, characterized in that: Solenoid valves (11) are installed on both the water inlet pipe (7) and the water outlet pipe (8).

6. The methanol boiler flue gas waste heat recovery device according to claim 1, characterized in that: A liquid level sensor (12) and a temperature sensor (13) are respectively installed in the heating cylinder (5), and the liquid level sensor (12), the temperature sensor (13) and the solenoid valve (11) are all connected to an external control unit.

7. The methanol boiler flue gas waste heat recovery device according to claim 1, characterized in that: A filter plate (10) is provided in the smoke exhaust pipe (1), and the filter plate (10) is located between the exhaust pipe (3) and the heating cylinder (5).

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