CN221744748U - Boiler flue gas heat pipe waste heat recovery device - Google Patents

Abstract

The utility model discloses a boiler flue gas heat pipe waste heat recovery device, which belongs to the technical field of boiler flue gas waste heat recovery. The boiler flue gas heat pipe waste heat recovery device includes a bottom plate on which a boiler device is installed, a waste heat recovery mechanism is installed on the upper end of the bottom plate, a flue gas purification mechanism is installed in the waste heat recovery mechanism, and the waste heat recovery mechanism is used to recycle the flue gas heat generated by the boiler device. The device recycles the heat of the flue gas through the waste heat recovery mechanism, and the recovery effect and efficiency are high, the boiler inlet water temperature is increased, the boiler thermal efficiency is increased, the natural gas consumption per ton of steam is reduced, and the flue gas exhaust temperature is reduced, while resources are saved, heat waste is avoided, and the flue gas can be filtered and purified, avoiding the direct discharge of dust and harmful gases in the flue gas to pollute the environment.

Description

Boiler flue gas heat pipe waste heat recovery device

Technical Field

The utility model relates to the field of boiler flue gas waste heat recovery, and in particular to a boiler flue gas heat pipe waste heat recovery device.

Background Art

A boiler is an energy conversion device. Its main working principle is to use the heat energy released after fuel combustion or the waste heat in industrial production to transfer to the water in the container, so that the water reaches the required temperature or a certain pressure of steam. Specifically, the fuel combustion continuously releases heat, and the high-temperature flue gas generated by the combustion transfers the heat to the heating surface of the boiler through heat transfer, and then is discharged from the chimney. Steam energy consumption accounts for about 70% of the total energy consumption of autoclaved aerated concrete production enterprises. In order to carry out low-carbon and energy-saving transformation of aerated concrete production, various manufacturers have done a lot of work. Due to the production process characteristics of autoclaved aerated concrete, the boiler needs to prepare about 1.3MPa of steam, and the maximum flue gas temperature of the boiler is about 240℃. Existing boilers lack a structure for recycling the waste heat in the flue gas and filtering and adsorbing the dust in the flue gas. 7%-25% of the sensible heat and 15% of the latent heat in the flue gas are not utilized and are directly discharged into the atmosphere, resulting in a waste of resources. At the same time, the flue gas of the boiler includes dust and harmful gases generated during the combustion of fuel. If the dust and harmful gases are directly discharged, it will cause environmental pollution and endanger the health of the workers. How to improve these problems has become an urgent problem to be solved by technical personnel in this field.

Utility Model Content

In order to make up for the above deficiencies, the utility model provides a boiler flue gas heat pipe waste heat recovery device, which aims to improve the existing boiler lacking a structure for recycling the waste heat in the flue gas and filtering and adsorbing and purifying the dust in the flue gas. 7%-25% of the sensible heat and 15% of the latent heat in the flue gas are not utilized and are directly discharged into the atmosphere, resulting in a waste of resources. At the same time, the boiler flue gas includes dust and harmful gases generated during fuel combustion. If the dust and harmful gases are directly discharged, it will cause environmental pollution and endanger the health of the workers.

The utility model is implemented as follows: a boiler flue gas heat pipe waste heat recovery device comprises a bottom plate on which a boiler device is installed, a waste heat recovery mechanism is installed on the upper end of the bottom plate, a flue gas purification mechanism is installed in the waste heat recovery mechanism, the waste heat recovery mechanism is used to recycle the flue gas heat generated by the boiler device, and the flue gas purification mechanism is used to filter dust in the flue gas and purify harmful gases.

In the preferred technical solution of the utility model, the waste heat recovery mechanism includes an installation box and a high-pressure water supply tank, the installation box and the high-pressure water supply tank are fixedly installed on the upper end of the base plate, a heat conversion tube is fixedly installed on the inner side of the base plate, the boiler equipment is connected to the heat conversion tube through a flue gas channel tube, a water pump is installed on one side of the high-pressure water supply tank, the water pump input end is connected to the inside of the high-pressure water supply tank, a connecting pipe is installed on the output end of the water pump, the connecting pipe runs through the installation box, and one end of the connecting pipe is connected to a heat absorbing and releasing device. The heat absorbing and releasing tube runs through the heat conversion tube, the installation box and the high-pressure water supply tank and the heat absorbing and releasing tube is arranged in the heat conversion tube. The tail end of the heat absorbing and releasing tube is arranged in the high-pressure water supply tank. The softened water in the high-pressure water supply tank is sent to the heat absorbing and releasing tube by a water pump. At the same time, the high-temperature flue gas entering the heat conversion tube through the flue gas channel tube contacts the heat absorbing and releasing tube, so that the softened water is heated. The heated softened water enters the high-pressure water supply tank and is sent to the boiler equipment, so that the boiler inlet water temperature is increased, thereby improving the boiler thermal efficiency.

In the preferred technical solution of the utility model, the heat conversion tube is arranged in a serpentine shape, and the shape of the heat absorption and heat release tube is matched with the heat conversion tube. The contact time between the heat absorption and heat release tube and the flue gas is increased by the serpentine heat conversion tube and the heat absorption and heat release tube, so that the heat absorption of the heat absorption and heat release tube is increased.

In the preferred technical solution of the utility model, one side of the bottom end of the heat conversion tube is connected to and installed with an air outlet pipe, and the air outlet pipe is provided with a solenoid valve.

In the preferred technical scheme of the present utility model, the flue gas purification mechanism includes a motor, the motor is installed at the upper end of the installation box, a screw is rotatably installed on the inner end of the installation box, the screw is driven by the motor, a moving rod is threadedly installed on the screw, a cleaning plate is installed on one side of the moving rod, a filter plate is fixedly installed on the inner side of the installation box, one side of the cleaning plate and the filter plate are slidably fitted, the dust in the flue gas is filtered by the filter plate, the moving rod drives the cleaning plate to move and clean the filter plate by the motor driving the screw, and the filter plate is blocked to affect the filtering effect.

In the preferred technical solution of the utility model, a guide rod is fixedly installed on the inner side of the installation box, and the guide rod slides through the moving rod to enhance the stability of the moving rod.

In the preferred technical solution of the utility model, an activated carbon plate is installed inside the installation box to adsorb and purify harmful gases in the flue gas.

In the preferred technical solution of the utility model, an exhaust pipe is installed on one side of the installation box to discharge the purified flue gas.

The beneficial effect of the utility model is that the boiler flue gas heat pipe waste heat recovery device obtained by the utility model through the above design, when in use, the boiler equipment sends the flue gas into the heat conversion tube through the flue gas channel tube, and at the same time the water pump sends the softened water in the high-pressure water supply tank into the heat absorption and heat release tube through the connecting pipe, the softened water entering the heat absorption and heat release tube contacts with the high-temperature flue gas in the heat conversion tube and absorbs heat, and the serpentine design increases the contact time between the heat conversion tube and the heat absorption and heat release tube, so that the heat absorbed by the softened water in the heat absorption and heat release tube increases, and the softened water enters the high-pressure water supply tank after absorbing the heat and is sent to the boiler equipment, so that the boiler water inlet temperature is increased, and the flue gas leaves the heat conversion tube through the outlet pipe and is filtered by the filter plate to filter the dust in the flue gas, and then is adsorbed and purified by the activated carbon plate and discharged through the exhaust pipe, and at the same time, the moving rod drives the cleaning plate to clean the filter plate through the motor transmission screw to prevent the filter plate from being blocked and affecting the filtering effect. The device recovers heat from flue gas through a waste heat recovery mechanism, with high recovery effect and efficiency, increases the boiler inlet water temperature, improves the boiler thermal efficiency, reduces the natural gas consumption per ton of steam, and reduces the flue gas exhaust temperature, while saving resources and avoiding heat waste. The device can also filter and purify the flue gas, preventing dust and harmful gases in the flue gas from being directly discharged and polluting the environment.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic structural diagram of a boiler flue gas heat pipe waste heat recovery device provided in an embodiment of the utility model;

FIG2 is another schematic diagram of the structure provided by an embodiment of the utility model;

FIG3 is a schematic diagram of the internal structure of the installation box provided in an embodiment of the present utility model;

FIG4 is a schematic diagram of the internal structure of another installation box provided in an embodiment of the present utility model;

FIG5 is a schematic diagram of the structure of the interior of the heat conversion tube and the heat absorbing and releasing tube provided in an embodiment of the utility model.

In the figure: 100-bottom plate; 110-boiler equipment; 200-waste heat recovery mechanism; 210-installation box; 211-smoke channel pipe; 220-heat conversion tube; 230-heat absorption and heat release tube; 240-water pump; 241-connecting pipe; 250-exhaust pipe; 260-high-pressure water supply tank; 300-smoke purification mechanism; 310-motor; 320-screw rod; 330-moving rod; 340-cleaning plate; 350-filter plate; 360-guide rod; 370-activated carbon plate; 380-exhaust pipe.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Please refer to Figures 1 to 5. The utility model provides a technical solution: a boiler flue gas heat pipe waste heat recovery device, including a base plate 100 on which a boiler device 110 is installed, a waste heat recovery mechanism 200 is installed on the upper end of the base plate 100, a flue gas purification mechanism 300 is installed in the waste heat recovery mechanism 200, the waste heat recovery mechanism 200 is used to recycle the flue gas heat generated by the boiler equipment 110, and the flue gas purification mechanism 300 is used to filter dust in the flue gas and purify harmful gases.

In some specific embodiments, the waste heat recovery mechanism 200 includes an installation box 210 and a high-pressure water supply box 260, the installation box 210 and the high-pressure water supply box 260 are fixedly installed on the upper end of the bottom plate 100, a heat conversion tube 220 is fixedly installed on the inner side of the bottom plate 100, the boiler equipment 110 is connected to the heat conversion tube 220 through the flue gas channel tube 211, a water pump 240 is installed on one side of the high-pressure water supply box 260, the input end of the water pump 240 is connected to the inside of the high-pressure water supply box 260, and a connecting pipe 241 is installed on the output end of the water pump 240, the connecting pipe 241 runs through the installation box 210, and one end of the connecting pipe 241 is connected to the heat absorbing and releasing pipe 230 installed The heat absorbing and releasing tube 230 passes through the heat conversion tube 220, the installation box 210 and the high-pressure water supply tank 260, and the heat absorbing and releasing tube 230 is arranged in the heat conversion tube 220. The tail end of the heat absorbing and releasing tube 230 is arranged in the high-pressure water supply tank 260. The softened water in the high-pressure water supply tank 260 is sent into the heat absorbing and releasing tube 230 through the water pump 240. At the same time, the high-temperature flue gas entering the heat conversion tube 220 through the flue gas channel tube 211 contacts the heat absorbing and releasing tube 230, so that the softened water is heated. The heated softened water enters the high-pressure water supply tank 260 and is sent into the boiler equipment 110, so that the boiler inlet water temperature is increased, and the boiler thermal efficiency is improved.

In some specific embodiments, the heat conversion tube 220 is serpentinely arranged, and the shape of the heat absorption and heat release tube 230 is matched with the arrangement of the heat conversion tube 220. The contact time between the heat absorption and heat release tube 230 and the flue gas is increased by the serpentine heat conversion tube 220 and the heat absorption and heat release tube 230, so that the heat absorption of the heat absorption and heat release tube 230 is increased.

In some specific implementation schemes, one side of the bottom end of the heat conversion tube 220 is connected to an air outlet pipe 250 , and the air outlet pipe 250 is provided with a solenoid valve.

In some specific embodiments, the flue gas purification mechanism 300 includes a motor 310, which is installed at the upper end of the installation box 210. A screw rod 320 is rotatably installed at the inner end of the installation box 210, and the screw rod 320 is driven by the motor 310. A moving rod 330 is threadedly installed on the screw rod 320, and a cleaning plate 340 is installed on one side of the moving rod 330. A filter plate 350 is fixedly installed on the inner side of the installation box 210, and one side of the cleaning plate 340 and the filter plate 350 are slidably fitted. The dust in the flue gas is filtered by the filter plate 350. The screw rod 320 is driven by the motor 310 so that the moving rod 330 drives the cleaning plate 340 to move and clean the filter plate 350, so that the filter plate 350 is blocked to affect the filtering effect.

In some specific embodiments, a guide rod 360 is fixedly installed inside the installation box 210 , and the guide rod 360 slides through the moving rod 330 to enhance the stability of the moving rod 330 .

In some specific embodiments, an activated carbon plate 370 is installed inside the installation box 210 to adsorb and purify harmful gases in the flue gas.

In some specific embodiments, an exhaust pipe 380 is installed on one side of the installation box 210 to discharge the purified flue gas.

Working principle: When in use, the boiler equipment 110 sends the flue gas into the heat conversion tube 220 through the flue gas channel tube 211, and at the same time, the water pump 240 sends the softened water in the high-pressure water supply tank 260 into the heat absorption and heat release tube 230 through the connecting tube 241. The softened water entering the heat absorption and heat release tube 230 contacts with the high-temperature flue gas in the heat conversion tube 220 and absorbs heat. The serpentine design increases the contact time between the heat conversion tube 220 and the heat absorption and heat release tube 230, so that the softened water in the heat absorption and heat release tube 230 absorbs more heat. In addition, after absorbing heat, the softened water enters the high-pressure water supply tank 260 and is sent to the boiler equipment 110, so that the boiler inlet water temperature is increased, and the flue gas leaves the heat conversion tube 220 through the outlet pipe 250 and is filtered by the filter plate 350 for dust in the flue gas. Then, it is adsorbed and purified by the activated carbon plate 370 and discharged through the exhaust pipe 380. At the same time, the motor 310 drives the screw rod 320 to drive the cleaning plate 340 to clean the filter plate 350 to prevent the filter plate 350 from being blocked and affecting the filtering effect.

The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims (7)

1. The utility model provides a boiler flue gas heat pipe waste heat recovery device, includes the bottom plate of installing boiler equipment, its characterized in that, waste heat recovery mechanism is installed to the bottom plate upper end, install flue gas purification mechanism in the waste heat recovery mechanism, waste heat recovery mechanism is used for right flue gas heat that boiler equipment produced carries out recycle, flue gas purification mechanism is arranged in filtering the dust in the flue gas and purifying harmful gas, waste heat recovery mechanism includes install bin and high-pressure supply tank, install bin and high-pressure supply tank fixed mounting in the bottom plate upper end, the inboard fixed mounting of bottom plate has the heat conversion pipe, boiler equipment pass through flue gas passageway pipe with heat conversion pipe intercommunication, the water pump is installed to high-pressure supply tank one side, the water pump input with the inside intercommunication of high-pressure supply tank, the communicating pipe is installed to the water pump output, the communicating pipe runs through the install the heat absorption and release pipe, the heat absorption and release pipe runs through heat conversion pipe, install bin and high-pressure supply tank and the heat release pipe set up in the heat tail end, the heat release pipe sets up in the heat release pipe.

2. The boiler flue gas heat pipe waste heat recovery device according to claim 1, wherein the heat transfer pipe is arranged in a serpentine shape, and the heat absorption and release pipe is arranged in a shape matching with the heat transfer pipe.

3. The device for recovering waste heat of flue gas heat pipes of a boiler according to claim 1, wherein an air outlet pipe is installed on one side of the bottom end of the heat conversion pipe in a communicating manner, and the air outlet pipe is provided with an electromagnetic valve.

4. The device for recovering waste heat of flue gas heat pipes of boilers according to claim 1, wherein the flue gas purifying mechanism comprises a motor, the motor is mounted at the upper end of the mounting box, a screw rod is rotatably mounted at the inner end of the mounting box, the screw rod is driven by the motor, a moving rod is mounted on the screw rod in a threaded manner, a cleaning plate is mounted on one side of the moving rod, a filter plate is fixedly mounted on the inner side of the mounting box, and one side of the cleaning plate is in sliding fit with the filter plate.

5. The apparatus according to claim 4, wherein a guide rod is installed and fixed on the inner side of the installation box, and the guide rod penetrates through the moving rod in a sliding manner.

6. The apparatus according to claim 4, wherein an activated carbon plate is installed inside the installation box.

7. The device for recovering waste heat of flue gas heat pipes of a boiler according to claim 4, wherein an exhaust pipe is installed on one side of the installation box in a communicating manner.