Boiler exhaust gas waste heat recovery device

Abstract

The utility model relates to the technical field of boiler flue gas heat recovery, in particular to a boiler waste gas waste heat recovery device which comprises a flue gas recovery heat exchanger, a gas inlet pipe and a flow guide assembly, the gas inlet end of the flue gas recovery heat exchanger is provided with the gas inlet pipe, the periphery of the gas inlet pipe is sleeved with the flow guide assembly, and the outer side of the flow guide assembly is provided with a flow guide pipe. A water inlet pipe is arranged on the back of the flue gas recovery heat exchanger, and the water inlet pipe is communicated with a feeding hole of a heat exchange runner in the flue gas recovery heat exchanger; a process water return pipe and a heating water return pipe are arranged at the bottom of the flue gas recovery heat exchanger, and electromagnetic valves are arranged on the process water return pipe and the heating water return pipe; the preheating heat recovery device is additionally arranged, high-temperature waste gas generated by the boiler and the production line burner is recovered for gas-water heat exchange, heating water is provided, and therefore the using effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler flue gas heat recovery, and particularly relates to a boiler waste heat recovery device. Background Art

[0002] Currently, when using a boiler, there is a lack of a preheating heat recovery device. Usually, during the production process of the boiler and its production line burners, a large amount of waste gas is generated, which contains a large amount of heat. Direct emission will cause a large amount of heat energy waste. Therefore, a boiler waste heat recovery device is proposed to facilitate the addition of a preheating heat recovery device, recover the high-temperature waste gas generated by the boiler and the production line burners for gas-water heat exchange, and provide heating water, thereby improving the use effect. Content of the Utility Model

[0003] In view of the problems in the prior art, the utility model provides a boiler waste heat recovery device to facilitate the addition of a preheating heat recovery device, recover the high-temperature waste gas generated by the boiler and the production line burners for gas-water heat exchange, and provide heating water, thereby improving the use effect.

[0004] The technical solution adopted by the utility model to solve its technical problems is a boiler waste heat recovery device, which includes a flue gas recovery heat exchanger, an intake pipe and a flow guiding component. The intake end of the flue gas recovery heat exchanger is provided with an intake pipe, and a flow guiding component is sleeved outside the intake pipe. A flow guiding pipe is arranged outside the flow guiding component. A water inlet pipe is arranged on the back of the flue gas recovery heat exchanger, and the water inlet pipe is communicated with the feed port of the heat exchange flow channel in the flue gas recovery heat exchanger;

[0005] A process return water pipe and a heating return water pipe are arranged at the bottom of the flue gas recovery heat exchanger, and electromagnetic valves are arranged on both the process return water pipe and the heating return water pipe.

[0006] By adopting the above technical solution, it is convenient to form a waste gas heat recovery and utilization mechanism, recover the heat in the boiler and the burner, and perform auxiliary heating and preheating treatment on process water and heating water, thereby improving the practicability of the device.

[0007] Specifically, the flow guiding component includes a flow guiding cylinder, and the flow guiding cylinder is sleeved outside the intake pipe. A spiral blade is connected to the outside of the intake pipe in the flow guiding cylinder through bolts. Sealing seats are connected to both ends of the flow guiding cylinder by welding, and the bottom of the sealing seat is connected to the flue gas recovery heat exchanger through bolts.

[0008] By adopting the above technical solution, it is convenient to utilize the spiral structure to pre-recover and preheat the waste gas heat, and further improve the use effect of the device.

[0009] Specifically, a drain pipe is arranged on one side of the flue gas recovery heat exchanger, and one end of the drain pipe is communicated with the discharge port of the heat exchange flow channel.

[0010] By adopting the above technical solution, it is convenient to send out the preheated water flow and return it to the pipeline.

[0011] Specifically, a water inlet is arranged on one side of the guide cylinder, and the water inlet is communicated with a guide pipe. A water outlet is arranged on the other side of the guide cylinder, and the water outlet is communicated with a water inlet pipe.

[0012] By adopting the above technical solution, it is convenient to introduce the pipeline water into the flue gas recovery heat exchanger.

[0013] Specifically, the guide pipe includes a first control valve, and the drain pipe includes a second control valve.

[0014] By adopting the above technical solution, it is convenient to control the opening and closing of the water flow in different pipelines.

[0015] Specifically, heat insulation sleeves are sleeved around the periphery of the process return water pipe and the heating return water pipe.

[0016] By adopting the above technical solution, it is convenient to add a heat insulation and anti-freezing mechanism.

[0017] Specifically, a purification box is arranged on one side of the air outlet end of the flue gas recovery heat exchanger, and the air outlet end of the flue gas recovery heat exchanger is communicated with the purification box through a pipeline.

[0018] By adopting the above technical solution, it is convenient to purify and filter the waste gas after heat exchange.

[0019] Advantages of the present utility model:

[0020] (1) For the boiler waste gas waste heat recovery device of the present utility model, by providing the flue gas recovery heat exchanger, the intake pipe, the water inlet pipe, the process return water pipe, and the heating return water pipe, a preheating heat recovery device can be added, and the waste heat of the flue gas can be used to assist in preheating and heating the process water and heating water, thereby reducing the waste of waste heat energy of the waste gas generated by the boiler and the burners of the production line, and improving the use effect and value of the device.

[0021] (2) For the boiler waste gas waste heat recovery device of the present utility model, by providing the guide cylinder, the intake pipe, the spiral blades, and the sealing seat, the spiral structure can be utilized to preheat and warm up the contact with the waste gas heat in advance, thereby improving the heat recovery efficiency and simultaneously improving the use effect of the device. Description of the Drawings

[0022] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0023] Figure 1 is the overall structural schematic diagram of the present utility model;

[0024] Figure 2Schematic cross-sectional structure diagram of the diversion component of the present utility model;

[0025] Figure 3 Schematic cross-sectional structure diagram of the process return water pipe of the present utility model;

[0026] In the figure: 1. Flue gas recovery heat exchanger; 2. Inlet pipe; 3. Diversion component; 301. Diversion cylinder; 302. Spiral blade; 303. Sealing seat; 304. Water inlet; 305. Water outlet; 4. Diversion pipe; 401. First control valve; 5. Inlet water pipe; 6. Process return water pipe; 7. Heating return water pipe; 8. Drain pipe; 801. Second control valve; 9. Solenoid valve; 10. Heat insulation sleeve; 11. Purification box. Specific embodiments

[0027] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] In order to facilitate the addition of a preheating heat recovery device, the high-temperature waste gas generated by the boiler and the production line burner is recovered for gas-water heat exchange to provide heating water, thereby improving the use effect. As Figures 1-3 shown, the boiler waste gas heat recovery device of the present utility model includes a flue gas recovery heat exchanger 1, an inlet pipe 2 and a diversion component 3. The inlet end of the flue gas recovery heat exchanger 1 is provided with an inlet pipe 2, and a diversion component 3 is sleeved outside the inlet pipe 2. A diversion pipe 4 is arranged outside the diversion component 3. The back of the flue gas recovery heat exchanger 1 is provided with an inlet water pipe 5, and the inlet water pipe 5 communicates with the feed port of the heat exchange flow channel in the flue gas recovery heat exchanger 1;

[0029] The bottom of the flue gas recovery heat exchanger 1 is provided with a process return water pipe 6 and a heating return water pipe 7, and solenoid valves 9 are arranged on both the process return water pipe 6 and the heating return water pipe 7.

[0030] During use, the waste gas heat generated by the boiler and the burner can be recovered through the flue gas recovery heat exchanger 1, the inlet pipe 2, the process return water pipe 6 and the heating return water pipe 7, and at the same time, the process water and heating water are heated and preheated to improve the practicability of the device.

[0031] In order to improve, for example, as Figure 1 , Figure 2 shown, the present utility model further includes that the diversion component 3 includes a diversion cylinder 301, and the diversion cylinder 301 is sleeved outside the inlet pipe 2. A spiral blade 302 is connected to the outside of the inlet pipe 2 in the diversion cylinder 301 through bolts. Sealing seats 303 are connected to both ends of the diversion cylinder 301 by welding, and the bottom of the sealing seat 303 is connected to the flue gas recovery heat exchanger 1 through bolts.

[0032] During use, through the draft tube 301, the spiral blade 302 and the sealing seat 303, the spiral diversion structure can be increased, further improving the recovery effect of the waste gas heat and reducing the heat loss caused by the waste gas pipeline.

[0033] Exemplarily, as Figure 1 shown, the present invention further includes that a drain pipe 8 is provided on one side of the flue gas recovery heat exchanger 1, and one end of the drain pipe 8 is communicated with the discharge port of the heat exchange flow path.

[0034] During use, through the drain pipe 8, it is convenient to send out the preheated and warmed running water.

[0035] Exemplarily, as Figure 2 shown, the present invention further includes that a water inlet 304 is provided on one side of the draft tube 301, and the water inlet 304 is communicated with the draft tube 4. A water outlet 305 is provided on the other side of the draft tube 301, and the water outlet 305 is communicated with the water inlet pipe 5.

[0036] During use, through the water inlet 304 and the water outlet 305, it is convenient to connect the draft tube 4 and the water inlet pipe 5, so that the water flow is introduced into the flue gas recovery heat exchanger 1.

[0037] Exemplarily, as Figure 1 shown, the present invention further includes that the draft tube 4 includes a first control valve 401, and the drain pipe 8 includes a second control valve 801.

[0038] During use, through the first control valve 401 and the second control valve 801, it is convenient to control and adjust the opening and closing of different water circuits.

[0039] Exemplarily, as Figure 3 shown, the present invention further includes that heat insulation sleeves 10 are sleeved outside the process return water pipe 6 and the heating return water pipe 7.

[0040] During use, it is convenient to improve the heat insulation and anti-freezing effects of the process return water pipe 6 and the heating return water pipe 7.

[0041] Exemplarily, as Figure 1 shown, the present invention further includes that a purification box 11 is provided on one side of the gas outlet end of the flue gas recovery heat exchanger 1, and the gas outlet end of the flue gas recovery heat exchanger 1 is communicated with the purification box 11 through a pipeline.

[0042] During use, through the purification box 11, it is convenient to purify and filter the waste gas after heat exchange.

[0043] When the utility model is in use, first, the waste gas generated by the boiler and the production line burner enters the flue gas recovery heat exchanger 1 from the intake pipe 2. At the same time, the first control valve 401 is manually opened, so that the water flow in the process return water pipe 6 or the heating return water pipe 7 sequentially passes through the diversion pipe 4, the diversion cylinder 301 and the intake pipe 5 and enters the flow channel in the flue gas recovery heat exchanger 1 for heat exchange treatment, thereby realizing the heating and preheating treatment of process water and heating water. This can not only improve the practicability of the device, but also reduce the waste of heat resources in the boiler waste gas, making it more energy-saving and environmentally friendly;

[0044] Moreover, when the flowing water enters the diversion cylinder 301, through the spiral structure of the spiral blade 302, the flowing water can be preheated before entering the flue gas recovery heat exchanger 1, further improving the heat recovery effect, thereby increasing the practical value of the device. Finally, the corresponding second control valve 801 is manually opened, so that the heated and preheated water flow returns to the process return water pipe 6 or the heating return water pipe 7 through the drain pipe 8 in sequence to complete the reflux for subsequent use. The waste gas enters the purification box 11 through the exhaust pipe and is sent out after being purified.

[0045] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims

1. A boiler exhaust gas waste heat recovery device, characterized in that: The invention comprises a flue gas recovery heat exchanger (1), an air intake pipe (2) and a flow guide assembly (3), wherein the air intake end of the flue gas recovery heat exchanger (1) is provided with an air intake pipe (2), the outer periphery of the air intake pipe (2) is provided with a flow guide assembly (3), the outer side of the flow guide assembly (3) is provided with a flow guide pipe (4), and the back of the flue gas recovery heat exchanger (1) is provided with a water intake pipe (5), and the water intake pipe (5) is connected to the feed port of the heat exchange channel in the flue gas recovery heat exchanger (1); A process water return pipe (6) and a heating water return pipe (7) are arranged at the bottom of the flue gas recovery heat exchanger (1), and both the process water return pipe (6) and the heating water return pipe (7) are provided with a solenoid valve (9).

2. The boiler exhaust gas waste heat recovery device according to claim 1, characterized in that: The flow guide assembly (3) comprises a flow guide tube (301), and the flow guide tube (301) is sleeved on the periphery of the air intake pipe (2), and a spiral blade (302) is connected to the periphery of the air intake pipe (2) in the flow guide tube (301) by bolts, and both ends of the flow guide tube (301) are connected to a sealing seat (303) by welding, and the bottom of the sealing seat (303) is connected to the flue gas recovery heat exchanger (1) by bolts.

3. The boiler exhaust gas waste heat recovery device according to claim 1, characterized in that: A drainage pipe (8) is provided on one side of the flue gas recovery heat exchanger (1), and one end of the drainage pipe (8) is connected to the discharge port of the heat exchange channel.

4. The boiler exhaust gas waste heat recovery device according to claim 2, characterized in that: A water inlet (304) is provided on one side of the flow guide tube (301), and the water inlet (304) is connected to the flow guide tube (4); a water outlet (305) is provided on the other side of the flow guide tube (301), and the water outlet (305) is connected to the water inlet tube (5).

5. The boiler exhaust gas waste heat recovery device according to claim 3, characterized in that: The flow guide pipe (4) comprises a first control valve (401), and the drainage pipe (8) comprises a second control valve (801).

6. The boiler exhaust gas waste heat recovery device according to claim 1, characterized in that: The process water return pipe (6) and the heating water return pipe (7) are both sheathed with a heat insulation sleeve (10) on their peripheries.

7. The boiler exhaust gas waste heat recovery device according to claim 1, characterized in that: A purification box (11) is provided on one side of the gas outlet end of the flue gas recovery heat exchanger (1), and the gas outlet end of the flue gas recovery heat exchanger (1) is connected to the purification box (11) via a pipeline.

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