A cyclone and cloth bag combined dust removal biomass boiler flue gas purification device

Abstract

The utility model provides a kind of whirl, cloth bag composite dust removal's biomass boiler flue gas purification device, belong to flue gas purification technical field, it solves the existing flue gas purification device dust removal mode single and dust removal effect is not good and other technical problems. Including dust collecting mechanism, dust collecting mechanism upper end is sequentially equipped with heat exchanger, cyclone dust removal mechanism and cloth bag dust removal mechanism from left to right, the water inlet pipe of heat exchanger is connected external water tank, the water outlet pipe of heat exchanger is connected external heat preservation tank through heat preservation water pipe, the air inlet pipe of heat exchanger is connected boiler exhaust pipe, and the air outlet pipe of heat exchanger is connected between cyclone dust removal mechanism through pipeline. The utility model can recycle waste heat in flue gas, avoid high temperature damage dust removal cloth bag, prolong the service life of dust removal equipment, realize the step efficient use of energy, through the composite mode of cyclone dust removal mechanism and cloth bag dust removal mechanism series connection, grading processing, improve overall dust removal efficiency and precision, can be unified to collect ash, make collection and processing more convenient, efficient.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas purification technology, and relates to a biomass boiler flue gas purification device, particularly a biomass boiler flue gas purification device with cyclone and bag filter composite dust removal. Background Technology

[0002] Biomass boilers, as a renewable energy utilization device, generate a large amount of high-temperature flue gas during operation. This flue gas not only carries high heat, causing energy waste, but also contains a large amount of dust pollutants. If directly discharged, it will cause serious environmental pollution.

[0003] Currently, common flue gas treatment methods either employ a single dust removal technology, such as using a cyclone dust collector or a bag filter alone. The former is difficult to effectively capture fine dust, while the latter is prone to damaging the filter bags due to the high temperature of the flue gas and faces problems such as high system resistance and frequent dust cleaning; or wet dust removal is used, which can cool down and remove dust, but will generate wastewater and cause secondary pollution.

[0004] Therefore, we propose a biomass boiler flue gas purification device with cyclone and bag filter composite dust collection. It can recover the waste heat in the flue gas, avoid high temperature damage to the dust collection bags, extend the service life, and realize the cascaded and efficient utilization of energy. Through the composite mode of cyclone dust collection mechanism and bag dust collection mechanism connected in series, it can process in stages, improve the overall dust collection efficiency and accuracy, and collect ash and slag in a unified manner, making collection and treatment more convenient and efficient. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a biomass boiler flue gas purification device that combines cyclone and bag filter dust removal. The technical problem to be solved by this utility model is: how to remove dust from biomass boiler flue gas and recover waste heat from the flue gas through a combination of cyclone and bag filter dust removal.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A biomass boiler flue gas purification device with cyclone and bag filter composite dust collection includes an ash collection mechanism. The upper end of the ash collection mechanism is provided with a heat exchanger, a cyclone dust collection mechanism and a bag filter dust collection mechanism in sequence from left to right. The water inlet pipe of the heat exchanger is connected to an external water tank, the water outlet pipe of the heat exchanger is connected to an external insulation tank through an insulated water pipe, the air inlet pipe of the heat exchanger is connected to the boiler exhaust pipe, and the air outlet pipe of the heat exchanger is connected to the cyclone dust collection mechanism through a pipe. Both the cyclone dust collection mechanism and the bag filter dust collection mechanism are internally connected to the ash collection mechanism.

[0008] The working principle of this utility model is as follows: During installation, the ash collection mechanism can be hoisted to the designated position for installation. The high-temperature flue gas transported by the boiler exhaust pipe first enters the heat exchanger through the inlet pipe and is discharged through the outlet pipe of the heat exchanger. At the same time, the cold water from the external water tank enters the heat exchanger through the inlet pipe and exchanges heat with the high-temperature flue gas. The cooled flue gas is discharged from the outlet pipe of the heat exchanger, while the heated water is transported to the external insulation tank through the insulation water pipe. At the same time, high temperature is avoided to damage the bag dust collection mechanism and the service life is extended.

[0009] Subsequently, the cooled flue gas enters the cyclone dust collector through the pipeline, where centrifugal force is used to remove larger particles of ash and slag from the flue gas. These dust particles are collected in the ash collection mechanism. Afterward, the flue gas continues to enter the bag filter dust collector, where the remaining fine dust is captured through filtration. The dust is also collected in the ash collection mechanism, thus achieving efficient composite dust removal. Finally, the purified flue gas is discharged into the atmosphere.

[0010] The ash collection mechanism includes an ash collection chamber and an ash collection trolley. The ash collection chamber has two symmetrically arranged lifting handles on both sides, and the lifting handles are also symmetrically positioned left and right. Each side of the ash collection chamber is fixed with a latching lock. A U-shaped rubber sealing ring is detachably installed on the inner top of the ash collection chamber. Slide rails are provided on both sides of the interior of the ash collection chamber. The upper end of the ash collection chamber has two dust collection ports. The ash collection trolley slides along the slide rails on both sides inside the ash collection chamber. The trolley is located below dust collection port one and dust collection port two. The upper outer side of the dust collection trolley abuts against the rubber sealing ring. The upper front side of the dust collection trolley is provided with a protruding strip, and the rear end face of the protruding strip is provided with a rubber sealing gasket. The sealing gasket abuts against the upper front side of the dust collection chamber. The rubber sealing ring and the rubber sealing gasket cooperate to form a sealed environment. The front side of the dust collection trolley is provided with a trolley handle. Locking hooks are fixed on both the left and right sides of the front end face of the dust collection trolley. The locking hooks cooperate with the buckles on the same side to form a buckle lock.

[0011] Using the above structure, the ash collection trolley uses locking hooks on its left and right sides to engage with latches fixed on the left and right sides of the ash collection chamber, forming a latch lock that securely locks the ash collection trolley in the working position. At this time, the upper end of the ash collection trolley is tightly pressed against the U-shaped detachable rubber sealing ring at the top of the ash collection chamber, while the rubber sealing gasket at the rear end of the upper front protrusion also tightly presses against the upper front end of the ash collection chamber. Together, these elements create an effective sealed environment to prevent dust from escaping. During the dust removal process, a cyclone dust collector and a bag filter are used for dust collection. The dust separated by the mechanism falls into the dust collection chamber through the corresponding dust collection port one and dust collection port two at the top of the dust collection chamber. The dust collection trolley is responsible for receiving and collecting all the dust, thereby completing the centralized treatment and transportation of ash and slag. When dust removal is required, the hook and lock device is released, and the operator can smoothly pull the fully loaded dust collection trolley out of the dust collection chamber through the trolley handle on the front side and with the help of the slide rails set on the left and right sides inside the dust collection chamber. In addition, the lifting handles symmetrically set on the left and right sides of the dust collection chamber provide convenience for the lifting and transportation of the entire mechanism.

[0012] The cyclone dust removal mechanism includes a fixed frame, which is fixedly installed at the upper middle position of the dust collection chamber. A cyclone dust collector is fixed inside the fixed frame. An inlet pipe is provided on the outer side of the cyclone dust collector, which is connected to the outlet pipe of the heat exchanger. Several cleaning pipes are provided on the outer side of the lower cone of the cyclone dust collector, and all cleaning pipes are connected to the inside of the lower cone of the cyclone dust collector. A shut-off valve is detachably installed at the lower end of the lower cone of the cyclone dust collector. The lower end of the shut-off valve is detachably installed at the upper end of the dust collection chamber, and the lower end of the shut-off valve is directly opposite the dust collection port, and is connected to the inside of the dust collection chamber through the dust collection port.

[0013] With the above structure, the flue gas cooled by the heat exchanger enters the cyclone dust collector unidirectionally through the inlet pipe, forming a rotating airflow inside. Centrifugal force throws larger ash particles against the wall of the collector and separates them. The separated dust settles to the bottom of the cyclone dust collector under gravity and is discharged through the airlock at the bottom. It then falls into the ash collection chamber below through the second dust collection port and is collected by the ash collection trolley. The entire cyclone dust collector mechanism is stably installed in the middle of the upper part of the ash collection chamber by a fixed frame. After a period of dust removal, dust will accumulate on the inner wall of the lower cone of the cyclone dust collector. Excessive dust accumulation can lead to blockage. During the intervals of dust removal, high-pressure airflow can be delivered through several dust removal pipes to blow off the dust accumulated on the lower cone of the cyclone dust collector, avoiding long-term accumulation and blockage.

[0014] The cyclone dust collector is detachably equipped with an exhaust fan at its upper end. The air inlet pipe of the exhaust fan extends into the interior of the cyclone dust collector. An electric valve is provided at the end of the air outlet pipe of the exhaust fan. The axis of the first smoke inlet pipe is parallel to the axis of the exhaust fan outlet pipe, and the first smoke inlet pipe and the exhaust fan outlet pipe are located on the left and right sides of the cyclone dust collector, respectively.

[0015] With the above structure, while performing cyclone dust removal, the exhaust fan fixed above the cyclone dust collector continuously draws air, causing the purified gas to gather upwards and be discharged to the subsequent process through its outlet pipe. An electric valve controls the airflow to the bag filter dust removal mechanism.

[0016] The baghouse dust collection mechanism includes a baghouse dust collector, which is fixedly installed at the upper end of the dust collection chamber and located to the right of the cyclone dust collector. A dust-separating plate is provided at the upper interior of the baghouse dust collector, dividing the interior into a dust collection zone and an exhaust zone. An array of frames is provided on the dust-separating plate, with filter bags located on the outer sides of each frame. All filter bags are located in the dust collection zone. A second inlet pipe is located at the lower left side of the baghouse dust collector, connected to an electric valve. An electric valve is detachably installed at the lower end of the baghouse dust collector, with a discharge pipe connected to its lower end. The discharge pipe extends into the dust collection chamber through a dust collection port. An exhaust pipe is located on the right side of the baghouse dust collector, connected to the exhaust zone.

[0017] With the above structure, the flue gas from the cyclone dust collector is controlled by electric valve one and enters the dust collection zone at the bottom of the bag filter through the flue gas inlet pipe two. When the flue gas passes through the dust collector bags, the residual fine dust is blocked on the outside of the dust collector bags, while the purified gas enters the upper exhaust zone separated by the dust baffle plate and is finally discharged through the exhaust pipe. The removed dust settles to the bottom of the bag filter under the action of gravity and falls into the ash collection chamber through the discharge pipe and dust collection port one, controlled by electric valve two at the bottom, and is collected by the ash collection trolley, completing fine filtration and collection.

[0018] The rear side of the bag filter is equipped with a pulse air pump. The pulse air pump is connected to several air pipes through a multi-way solenoid valve. Some of the air pipes extend into the exhaust zone of the bag filter, and the number and position of these air pipes match the frame array. The other part of the air pipes are connected to the dust removal pipe.

[0019] With the above structure, the dust adhering to the outer wall of the dust collector bag is periodically cleaned by a pulse air pump. The pulse air pump delivers high-pressure airflow to several air pipes through a multi-way solenoid valve. The air pipes then spray out the high-pressure airflow, which back-blowing the dust collector bags on the internal frame array causes the dust on the outer surface of the dust collector bags to fall off. During cleaning, both electric valve 2 and electric valve 1 are closed to facilitate cleaning. At the same time, the high-pressure airflow delivered by the pulse air pump is delivered to the cleaning pipe through another part of the air pipe. The high-pressure airflow is output through the cleaning pipe, and, in conjunction with the shape of the lower cone of the cyclone dust collector, it removes the accumulated dust.

[0020] Compared with existing technologies, this biomass boiler flue gas purification device with cyclone and bag filter composite dust collection has the following advantages:

[0021] 1. By cooperating with the heat exchanger, the external insulation tank, and the external water tank, the high-temperature flue gas entering the heat exchanger exchanges heat with the cold water entering the heat exchanger. The generated hot water is then transported to the external insulation tank to recover the waste heat in the flue gas, avoid damage to the dust collector bags due to high temperature, extend their service life, and achieve efficient cascade utilization of energy.

[0022] 2. The flue gas enters the cyclone dust collector tangentially, creating a rotating airflow inside. Centrifugal force throws larger ash particles against the wall and separates them. Fine dust is then removed by a bag filter, and a pulse air pump periodically removes dust adhering to the filter bags. This combined cyclone and bag filter system effectively separates large ash particles from fine dust, improving overall dust removal efficiency and precision.

[0023] 3. By cooperating with the cyclone dust collector and the bag filter dust collector, the ash collection mechanism provides support for the cyclone dust collector and the bag filter dust collector, and collects the ash in the ash collection cart, making the collection and treatment of ash and slag more convenient and efficient. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the ash collection mechanism in this utility model.

[0026] Figure 3 This is an exploded structural diagram of the ash collection mechanism in this utility model.

[0027] Figure 4 This is a schematic diagram of the cyclone dust removal mechanism in this utility model.

[0028] Figure 5 This is a schematic diagram of the bag filter dust removal mechanism in this utility model.

[0029] In the diagram, 1. Ash collection mechanism; 2. Heat exchanger; 3. Cyclone dust collector; 4. Baghouse dust collector; 5. Ash collection chamber; 6. Trolley handle; 7. Ash collection trolley; 8. Dust collection port one; 9. Dust collection port two; 10. Cyclone dust collector; 11. Airlock; 12. Fixed frame; 13. Smoke inlet pipe one; 14. Exhaust fan; 15. Electric valve one; 16. Pulse air pump; 17. Smoke inlet pipe two; 18. Electric valve two; 19. Discharge pipe; 20. Exhaust pipe; 21. Baghouse dust collector. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] like Figures 1-5As shown, this biomass boiler flue gas purification device with cyclone and bag filter composite dust collection includes an ash collection mechanism 1. From left to right, the upper end of the ash collection mechanism 1 is provided with a heat exchanger 2, a cyclone dust collection mechanism 3, and a bag filter dust collection mechanism 4. The water inlet pipe of the heat exchanger 2 is connected to an external water tank, and the water outlet pipe of the heat exchanger 2 is connected to an external insulation tank through an insulated water pipe. The air inlet pipe of the heat exchanger 2 is connected to the boiler exhaust pipe, and the air outlet pipe of the heat exchanger 2 is connected to the cyclone dust collection mechanism 3 through a pipe. Both the cyclone dust collection mechanism 3 and the bag filter dust collection mechanism 4 are connected to the interior of the ash collection mechanism 1.

[0032] In this embodiment, during installation, the ash collection mechanism 1 can be hoisted to the designated position for installation. The high-temperature flue gas transported by the boiler exhaust pipe first enters through the inlet pipe of the heat exchanger 2 and is discharged through the outlet pipe of the heat exchanger 2. At the same time, the cold water from the external water tank enters the heat exchanger 2 through the inlet pipe and exchanges heat with the high-temperature flue gas. The cooled flue gas is discharged through the outlet pipe of the heat exchanger 2, while the heated water is transported to the external insulation tank through the insulation water pipe. This avoids high temperature damage to the bag filter dust collection mechanism 4 and extends its service life.

[0033] Subsequently, the cooled flue gas enters the cyclone dust collector 3 through the pipeline, where centrifugal force is used to remove larger particles of ash and slag from the flue gas. These dust particles are collected in the dust collection mechanism 1. Afterward, the flue gas continues to enter the bag filter dust collector 4, where the remaining fine dust is captured through filtration. The dust particles are also collected in the dust collection mechanism 1, thus achieving efficient composite dust removal. Finally, the purified flue gas is discharged into the atmosphere.

[0034] The ash collection mechanism 1 includes an ash collection chamber 5 and an ash collection trolley 7. The ash collection chamber 5 has two symmetrically arranged lifting handles on both its left and right sides. The ash collection chamber 5 is also equipped with hook-and-loop locking devices on both sides. A U-shaped rubber sealing ring is detachably installed on the top of the ash collection chamber 5. Slide rails are provided on both sides of the interior of the ash collection chamber 5. The upper end of the ash collection chamber 5 has two dust collection ports: a first dust collection port 8 and a second dust collection port 9. The ash collection trolley 7 slides along the slide rails inside the ash collection chamber 5. The dust collection cart 7 is located below the dust collection port 1 8 and the dust collection port 2 9. The upper outer side of the dust collection cart 7 abuts against the rubber sealing ring. The upper front side of the dust collection cart 7 is provided with a protruding strip, and the rear end face of the protruding strip is provided with a rubber sealing gasket. The sealing gasket abuts against the upper front side of the dust collection chamber 5. The rubber sealing ring and the rubber sealing gasket cooperate to form a sealed environment. The front side of the dust collection cart 7 is provided with a cart handle 6. Locking hooks are fixed on both the left and right sides of the front end face of the dust collection cart 7. The locking hooks cooperate with the latches on the same side to form a latch lock.

[0035] In this embodiment, the ash collection trolley 7 uses locking hooks on its left and right sides to engage with latches fixed on the left and right sides of the ash collection chamber 5, forming a latch lock that securely locks the ash collection trolley 7 in the working position. At this time, the upper end of the ash collection trolley 7 is tightly pressed against the U-shaped detachable rubber sealing ring at the top of the ash collection chamber 5, and the rubber sealing gasket at the rear end of the upper front protrusion is also tightly pressed against the upper front end of the ash collection chamber 5. Together, they form an effective sealed environment to prevent dust from escaping. During the dust removal process, the cyclone dust collector 3 and the bag dust collector... 4. The separated dust falls into the dust collection chamber 5 through the corresponding dust collection port 8 and dust collection port 9 at the top. The dust collection trolley 7 is responsible for receiving and collecting all the dust, thereby completing the centralized treatment and transportation of ash. When dust removal is required, the latch lock is released, and the operator can smoothly pull the fully loaded dust collection trolley 7 out of the dust collection chamber 5 through the front trolley handle 6 and the slide rails set on the left and right sides inside the dust collection chamber 5. In addition, the lifting handles symmetrically set on the left and right sides of the dust collection chamber 5 provide convenience for the lifting and transportation of the entire mechanism.

[0036] The cyclone dust collector 3 includes a fixed frame 12, which is fixedly installed at the upper middle position of the dust collection chamber 5. A cyclone dust collector 10 is fixed inside the fixed frame 12. An inlet pipe 13 is provided on the outer side of the cyclone dust collector 10. The inlet pipe 13 is connected to the outlet pipe of the heat exchanger 2. Several cleaning pipes are provided on the outer side of the lower cone of the cyclone dust collector 10. All cleaning pipes are connected to the inside of the lower cone of the cyclone dust collector 10. A shut-off valve 11 is detachably provided at the lower end of the lower cone of the cyclone dust collector 10. The lower end of the shut-off valve 11 is detachably installed at the upper end of the dust collection chamber 5, and the lower end of the shut-off valve 11 is directly opposite the dust collection port 9 and is connected to the inside of the dust collection chamber 5 through the dust collection port 9.

[0037] In this embodiment, the flue gas cooled by the heat exchanger 2 enters the cyclone dust collector 10 tangentially through the inlet pipe 13, forming a rotating airflow inside. Centrifugal force throws larger ash particles against the wall of the collector and separates them. The separated dust settles to the bottom of the cyclone dust collector 10 under gravity and is discharged through the airlock 11 at the bottom. It falls into the ash collection chamber 5 below through the dust collection port 9 and is collected by the ash collection trolley 7. The entire cyclone dust collector mechanism is stably installed in the middle of the upper end of the ash collection chamber 5 by the fixed frame 12. After a period of dust removal, dust will accumulate on the inner wall of the lower cone of the cyclone dust collector 10. Excessive dust accumulation will cause blockage. During the intervals of dust removal, high-pressure airflow can be delivered through several dust removal pipes to blow off the dust accumulated on the lower cone of the cyclone dust collector 10, avoiding long-term accumulation and blockage.

[0038] A detachable exhaust fan 14 is provided at the upper end of the cyclone dust collector 10. The air inlet pipe of the exhaust fan 14 extends into the interior of the cyclone dust collector 10. An electric valve 15 is provided at the end of the air outlet pipe of the exhaust fan 14. The axis of the smoke inlet pipe 13 is parallel to the axis of the air outlet pipe of the exhaust fan 14, and the smoke inlet pipe 13 and the air outlet pipe of the exhaust fan 14 are located on the left and right sides of the cyclone dust collector 10, respectively.

[0039] In this embodiment, while performing cyclone dust removal, the exhaust fan 14 fixed above the cyclone dust collector 10 continuously draws air, causing the purified gas to gather upwards and be discharged to the subsequent process through its exhaust pipe. The electric valve controls the airflow to the bag filter mechanism.

[0040] The bag filter dust collection mechanism 4 includes a bag filter dust collector 21, which is fixedly installed at the upper end of the dust collection chamber 5 and located to the right of the cyclone dust collector 10. The upper end of the bag filter dust collector 21 is equipped with a dust-separating plate, which divides the interior of the bag filter dust collector 21 into a dust collection area and an exhaust area. The dust-separating plate is equipped with a frame array, and dust collection bags are provided on the outer side of the frame. The dust collection bags are all located in the dust collection area. The lower left end of the bag filter dust collector 21 is equipped with a second smoke inlet pipe 17, which is connected to an electric valve 15. The lower end of the bag filter dust collector 21 is detachably equipped with an electric valve 18, and the lower end of the electric valve 18 is connected to a discharge pipe 19, which extends into the dust collection chamber 5 through a dust collection port 8. The right side of the bag filter dust collector 21 is equipped with an exhaust pipe 20, which is connected to the exhaust area.

[0041] In this embodiment, the flue gas from the cyclone dust collector 3 is controlled by electric valve 15 and enters the dust collection area at the bottom of the bag filter 21 through the flue gas inlet pipe 17. When the flue gas passes through the dust collector bag, the residual fine dust is blocked on the outer surface of the dust collector bag, while the purified gas enters the upper exhaust area separated by the dust separator plate and is finally discharged through the exhaust pipe 20. The removed dust settles to the bottom of the bag filter 21 under the action of gravity and falls into the ash collection chamber 5 through the discharge pipe 19 and the dust collection port 8 controlled by electric valve 18 at the bottom of the bag filter 21. It is then collected by the ash collection trolley 7, completing fine filtration and collection.

[0042] A pulse air pump 16 is provided at the rear of the bag filter 21. The pulse air pump 16 is connected to several air pipes through a multi-way solenoid valve. Some of the air pipes extend into the exhaust area of ​​the bag filter 21, and the number and position of these air pipes match the frame array. The other part of the air pipes are connected to the dust removal pipe.

[0043] In this embodiment, the dust adhering to the outer wall of the dust collector bag is periodically cleaned by the pulse air pump 16. The pulse air pump 16 delivers high-pressure airflow to several air pipes through a multi-way solenoid valve. The air pipes spray out the high-pressure airflow, which back-blowing the dust collector bags on the frame array from the inside, causing the dust on the outer surface of the dust collector bags to fall off. During the cleaning process, both electric valve 2 18 and electric valve 15 are closed to facilitate cleaning. At the same time, the high-pressure airflow delivered by the pulse air pump 16 is delivered to the cleaning pipe through another part of the air pipe. The high-pressure airflow is output through the cleaning pipe, which, in conjunction with the shape of the lower cone of the cyclone dust collector 10, removes the accumulated dust.

[0044] The working principle of this utility model is as follows: During installation, the ash collection mechanism 1 can be hoisted to the designated position by the hoisting handles symmetrically arranged on the left and right sides of the ash collection chamber 5. The ash collection trolley 7 is locked by the locking hooks on the left and right sides of its front end face and the latch lock on the same side of the ash collection chamber 5. At the same time, the outer side of the upper end of the ash collection trolley 7 is tightly pressed against the U-shaped detachable rubber sealing ring at the top of the ash collection chamber 5, and the rubber sealing gasket at the rear end of the front protrusion of its upper end is tightly pressed against the upper front end of the ash collection chamber 5, thus forming an effective sealing environment.

[0045] The high-temperature flue gas transported by the boiler exhaust pipe first enters the heat exchanger 2 through the inlet pipe. At the same time, cold water from the external water tank enters the heat exchanger 2 through the inlet pipe to exchange heat with the high-temperature flue gas. The cooled flue gas is discharged from the outlet pipe of the heat exchanger 2, while the heated water is transported to the external insulation tank through the insulated water pipe to recover the waste heat of the flue gas and realize the cascade utilization of energy. At the same time, it effectively avoids the high-temperature flue gas from directly entering the subsequent stages and damaging the bag filter dust collector 4, thus extending its service life.

[0046] The cooled flue gas enters the cyclone dust collector 10 tangentially through the inlet pipe 13, forming a rotating airflow inside. The centrifugal force throws larger ash particles against the wall of the collector and separates them. The exhaust fan 14 continuously draws in air, so that the preliminarily purified gas is discharged through its outlet pipe (controlled by the electric valve 15). The separated large ash particles settle to the bottom of the cyclone dust collector 10 under the action of gravity and are discharged through the airlock 11 at the bottom. They fall into the dust collection chamber 5 through the dust collection port 29. In order to prevent dust accumulation and blockage in the lower cone of the cyclone dust collector 10, during the dust removal interval, the high-pressure airflow generated by the pulse air pump 16 can be transported to several dust removal pipes through another part of the air pipe to blow off the accumulated dust.

[0047] Under the control of electric valve 15, the pre-purified flue gas enters the dust collection area at the bottom of the bag filter 21 through the flue gas inlet pipe 17. When the flue gas passes through the dust collection bags, the residual fine dust is blocked on the outer surface of the dust collection bags, while the purified gas enters the exhaust area above and is finally discharged into the atmosphere through the exhaust pipe 20. The removed dust settles to the bottom of the bag filter 21 under the action of gravity. In order to maintain the dust collection efficiency, the pulse air pump 16 controls the airflow of a part of the air pipe through the multi-way solenoid valve, spraying the high-pressure airflow from the inside to the dust collection bags on the frame array, back-blowing the dust collection bags and causing the attached dust to fall off. During this dust removal process, electric valve 18 and electric valve 15 are closed to facilitate dust removal. The fallen dust is finally controlled by electric valve 18 and falls into the dust collection chamber 5 through the discharge pipe 19 and the dust collection port 8.

[0048] Throughout the process, all dust from the cyclone dust collector 3 and the bag dust collector 4 falls into the dust collection chamber 5 through dust collection port 2 9 and dust collection port 1 8, respectively, and is collected and gathered by the sliding dust collection trolley 7 inside. When dust removal is required, the latch lock is released, and the operator can smoothly pull out the fully loaded dust collection trolley 7 through the front trolley handle 6 and with the help of the slide rails set on the left and right sides inside the dust collection chamber 5, thereby completing the centralized treatment and removal of ash and slag.

[0049] In summary, by using heat exchanger 2 in conjunction with an external insulation tank and an external water tank, the high-temperature flue gas entering heat exchanger 2 exchanges heat with the cold water entering heat exchanger 2, and the generated hot water is transported to the external insulation tank to recover the waste heat in the flue gas, avoid high-temperature damage to the dust collector bags, extend their service life, and achieve efficient cascade utilization of energy.

[0050] The flue gas enters the cyclone dust collector 3 tangentially, causing the flue gas to form a rotating airflow inside the cyclone dust collector 3. The centrifugal force throws larger ash particles against the wall of the device and separates them. The fine dust is filtered out by the bag filter 21, and the dust adhering to the dust collector bag is removed by the pulse air pump 16 at regular intervals. The composite mode of the cyclone dust collector 3 and the bag filter 4 connected in series can classify and process large ash particles and fine dust, thereby improving the overall dust removal efficiency and accuracy.

[0051] The ash collection mechanism 1 works in conjunction with the cyclone dust collector 3 and the bag filter dust collector 4 to provide support for the cyclone dust collector 3 and the bag filter dust collector 4, and collects the ash in the ash collection cart 7, making the collection and treatment of ash and slag more convenient and efficient.

[0052] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A biomass boiler flue gas purification device using a cyclone and baghouse composite dust collector, comprising an ash collection mechanism (1), characterized in that, The upper end of the ash collection mechanism (1) is provided with a heat exchanger (2), a cyclone dust removal mechanism (3) and a bag dust removal mechanism (4) from left to right. The water inlet pipe of the heat exchanger (2) is connected to an external water tank. The water outlet pipe of the heat exchanger (2) is connected to an external heat preservation tank through an insulated water pipe. The air inlet pipe of the heat exchanger (2) is connected to the boiler exhaust pipe. The air outlet pipe of the heat exchanger (2) is connected to the cyclone dust removal mechanism (3) through a pipe. Both the cyclone dust removal mechanism (3) and the bag dust removal mechanism (4) are connected to the interior of the ash collection mechanism (1).

2. The biomass boiler flue gas purification device with cyclone and bag filter composite dust removal according to claim 1, characterized in that, The ash collection mechanism (1) includes an ash collection chamber (5) and an ash collection trolley (7). The ash collection chamber (5) has two symmetrically arranged lifting handles on both the left and right sides. The lifting handles on both sides are symmetrically arranged. The ash collection chamber (5) has a buckle lock on both the left and right sides. The top of the ash collection chamber (5) is detachably provided with a U-shaped rubber sealing ring. The ash collection chamber (5) has slide rails on both the left and right sides. The upper end of the ash collection chamber (5) has a dust collection port 1 (8) and a dust collection port 2 (9). The ash collection trolley (7) slides along the slide rails on both sides inside the ash collection chamber (5). The dust collection cart (7) is located below the dust collection port one (8) and the dust collection port two (9). The upper outer side of the dust collection cart (7) abuts against the rubber sealing ring. The upper front side of the dust collection cart (7) is provided with a protruding strip. The rear end face of the protruding strip is provided with a rubber sealing gasket. The sealing gasket abuts against the upper front side of the dust collection chamber (5). The rubber sealing ring and the rubber sealing gasket cooperate to form a sealed environment. The front side of the dust collection cart (7) is provided with a cart handle (6). The left and right sides of the front end face of the dust collection cart (7) are fixed with locking hooks. The locking hooks cooperate with the buckles on the same side to form a buckle lock.

3. The biomass boiler flue gas purification device with cyclone and bag filter composite dust removal according to claim 2, characterized in that, The cyclone dust removal mechanism (3) includes a fixed frame (12), which is fixedly installed at the middle of the upper end of the dust collection chamber (5). A cyclone dust collector (10) is fixed on the inner side of the fixed frame (12). A flue gas inlet pipe (13) is provided on the outer side of the cyclone dust collector (10). The flue gas inlet pipe (13) is connected to the outlet pipe of the heat exchanger (2). Several cleaning pipes are provided on the outer side of the lower cone of the cyclone dust collector (10). All cleaning pipes are connected to the interior of the lower cone of the cyclone dust collector (10). A shut-off valve (11) is detachably provided at the lower end of the lower cone of the cyclone dust collector (10). The lower end of the shut-off valve (11) is detachably installed at the upper end of the dust collection chamber (5). The lower end of the shut-off valve (11) is directly opposite the dust collection port (9) and is connected to the interior of the dust collection chamber (5) through the dust collection port (9).

4. The biomass boiler flue gas purification device with cyclone and bag filter composite dust removal according to claim 3, characterized in that, The cyclone dust collector (10) is detachably equipped with an exhaust fan (14) at its upper end. The air inlet pipe of the exhaust fan (14) extends into the interior of the cyclone dust collector (10). An electric valve (15) is provided at the end of the air outlet pipe of the exhaust fan (14). The axis of the smoke inlet pipe (13) is parallel to the axis of the air outlet pipe of the exhaust fan (14). The smoke inlet pipe (13) and the air outlet pipe of the exhaust fan (14) are located on the left and right sides of the cyclone dust collector (10), respectively.

5. The biomass boiler flue gas purification device with cyclone and bag filter composite dust removal according to claim 4, characterized in that, The bag filter dust collection mechanism (4) includes a bag filter dust collector (21), which is fixedly installed at the upper end of the dust collection chamber (5) and located to the right of the cyclone dust collector (10). A dust-separating plate is provided at the upper end of the bag filter dust collector (21), dividing the interior of the bag filter dust collector (21) into a dust collection area and an exhaust area. An array of frames is provided on the dust-separating plate, with filter bags located on the outer sides of each frame. All filter bags are located within the dust collection area. (21) has a second smoke inlet pipe (17) at the lower left end, which is connected to an electric valve (15). The lower end of the bag filter (21) is detachably equipped with an electric valve (18), which is connected to a discharge pipe (19). The discharge pipe (19) extends into the dust collection chamber (5) through the dust collection port (8). The right side of the bag filter (21) is equipped with an exhaust pipe (20), which is connected to the exhaust zone.

6. The biomass boiler flue gas purification device with cyclone and bag filter composite dust removal according to claim 5, characterized in that, The rear side of the bag filter (21) is equipped with a pulse air pump (16). The pulse air pump (16) is connected to several air pipes through a multi-port solenoid valve. A portion of the air pipes extend into the exhaust area of ​​the bag filter (21), and the number and position of this portion of the air pipes match the frame array. Another portion of the air pipes are connected to the dust removal pipe.

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