Biomass gas burning boiler with water-cooling settling chamber and water-fire tube structure
By introducing a water-cooled settling chamber and a water-cooled reflux pipe assembly into the high-temperature gasifier, combined with an online ash remover and a semi-automatic mechanical ash removal device, the problem of ash accumulation in biomass gas boilers has been solved, achieving efficient dust removal and continuous operation.
Patent Information
- Application Number
- CN202520398517.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-07
AI Technical Summary
Traditional high-temperature gasifiers are prone to ash accumulation when using biomass gas as fuel, resulting in low boiler thermal efficiency and difficulty in long-term continuous operation.
It adopts a water-fire tube structure with a water-cooled settling chamber. The water-cooled return pipe assembly removes the heat of the flue gas, reduces the flue gas temperature to promote dust condensation, and utilizes the water-cooled settling chamber and online ash removal machine to achieve efficient ash removal. Combined with a semi-automatic mechanical ash removal device, it can clean the accumulated ash without shutting down the furnace.
It effectively reduced the dust content in the flue gas, reduced ash accumulation in the heat exchange tubes, lowered the ash cleaning frequency, and improved heat exchange efficiency and the boiler's continuous operation capability.
Smart Images
Figure CN223852563U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a high temperature gasification furnace especially a biomass gas fired boiler with water cooling settling chamber and water fire pipe structure. BACKGROUND
[0002] Biomass gas is renewable fuel which uses crop straw, forest waste, edible fungus residue, poultry manure and all combustible materials as raw materials. However, the high temperature gasification furnace using biomass gas as fuel has the problem of easy ash accumulation during operation because of the high content of fly ash in pyrolysis gas. The traditional high temperature gasification pyrolysis gas boiler has the problems of easy ash accumulation and inconvenient cleaning, resulting in low thermal efficiency and inability to operate continuously for a long time. Therefore, how to solve the problem of easy ash accumulation of the high temperature gasification furnace using biomass gas as fuel has become an urgent problem in the high temperature gasification furnace production industry. SUMMARY
[0003] The utility model provides a biomass gas fired boiler with water cooling settling chamber and water fire pipe structure, solves the problem of easy ash accumulation of the high temperature gasification furnace using biomass gas as fuel in the prior art.
[0004] The above technical problems of the utility model are mainly solved by the following technical scheme: a biomass gas fired boiler with water cooling settling chamber and water fire pipe structure, comprising a first furnace body, a second furnace body and a heat exchange body, a burner is arranged on the first furnace body, the burner continuously burns with biomass gas as fuel, high temperature flue gas enters the heat exchange body along the first furnace body and the second furnace body, the heat exchange body is filled with fluid medium, a water cooling return pipe assembly is extended from the heat exchange body and wrapped around the first furnace body and the second furnace body, the water cooling return pipe assembly is composed of a plurality of descending pipes and a plurality of ascending pipes, the lower end of the descending pipe and the lower end of the ascending pipe are communicated with each other, and the upper ends of the two are communicated with the inner cavity of the heat exchange body, a water cooling settling chamber made of a metal plate is formed in the inside of the first furnace body and the second furnace body, a funnel-shaped water cooling ash bucket is arranged at the bottom of the water cooling settling chamber, a dust removal device is connected to the bottom of the water cooling ash bucket, the ascending pipes are wrapped around the left and right sides of the water cooling ash bucket and the water cooling settling chamber from bottom to top and are arranged in parallel along the length direction of the first furnace body, and the descending pipes are located outside the ascending pipes; a plurality of horizontal heat exchange smoke pipes are arranged in the heat exchange body, one end of the heat exchange smoke pipe is communicated with the water cooling settling chamber in the second furnace body, the other end is connected with a dust removal smoke box, and an online dust removal machine is arranged at the outer end of the dust removal smoke box.
[0005] The utility model discloses a water cooling backflow pipe assembly is set up, and the medium of relatively low temperature in the heat exchange body is guided to the outside of water cooling settling chamber, and the medium of low temperature flows along the downcomer, the riser continuously, can continuously take away the heat on the outer wall of water cooling settling chamber, and the left and right two outside of water cooling settling chamber are all distributed with the riser, so that the high-temperature flue gas is taken away a large amount of heat in the flowing process along the water cooling settling chamber, and the reduction of temperature can promote the smoke dust in the flue gas to condense and fall, and also can play the effect of preheat exchange, and the flue gas that enters the heat exchange flue pipe subsequently compares prior art temperature and reduces, so that relatively not easy to take place the coking condition, and the smoke dust content in these flue gas reduces, and the speed of ash deposition in the heat exchange flue pipe reduces obviously, and the operation frequency of on-line ash cleaning machine also reduces greatly.
[0006] Further, the riser between the left and right sides of the water cooling settling chamber is communicated with a branch pipe, and the branch pipe is located on the upper side of the water cooling settling chamber. This design can further increase the medium flow of the periphery of the water cooling settling chamber, thereby improving the heat exchange efficiency. The better the cooling effect of the water cooling settling chamber, the higher the efficiency of the smoke dust condensation and falling, and the better the dust removal effect.
[0007] Further, the bottom of the water cooling ash hopper is provided with an opening and closing plate, the ash removal device comprises a moving frame arranged in the water cooling settling chamber, an ash receiving groove arranged below the opening and closing plate, and a reciprocating mechanism arranged at the bottom of the first furnace body, a connecting rod is connected between the reciprocating mechanism and the moving frame, the connecting rod penetrates the opening and closing plate, and a scraper is arranged on the moving frame and abuts against the inner wall of the water cooling settling chamber. With the increase of the operation time, the inner surface of the water cooling ash hopper and the inner surface of the water cooling settling chamber will form ash deposition. If the thickness of the ash deposition is too thick, it will seriously affect the heat exchange, thereby greatly reducing the cooling effect of the water cooling settling chamber. Therefore, the ash removal device provided by the utility model is arranged, and the average operation temperature of the water cooling settling chamber is above 300 degrees Celsius. Therefore, the reciprocating mechanism for driving the moving frame to move is arranged outside the water cooling settling chamber, the moving frame is driven to move through the connecting rod, and the opening and closing plate is arranged, so that the opening and closing plate can be closed and the relative airtightness of the water cooling settling chamber can be maintained when the ash removal device is not operated.
[0008] Therefore, the utility model discloses the following characteristics compared with prior art: 1. The utility model discloses a water cooling backflow pipe assembly is set up, so that the high-temperature flue gas is taken along the water cooling sedimentation chamber flow process, will be taken away a large amount of heat, the temperature reduction will promote the smoke dust in the flue gas condensation and fall, subsequently enter the heat exchange smoke pipe flue gas compared with prior art temperature is low, therefore relatively not easy to take place the coking condition, and the smoke dust content in these flue gas reduces, and the speed of ash deposition in the heat exchange smoke pipe is obviously reduced, and the operation frequency of the on-line ash cleaning machine is also greatly reduced, 2. The ash removal device can mechanically scrape the ash deposition of the inner wall of the water cooling sedimentation chamber, to ensure that the water cooling sedimentation chamber can reliably carry out water cooling dust removal. BRIEF DESCRIPTION OF DRAWINGS
[0009] BRIEF DESCRIPTION OF DRAWINGS Figure 1 It is the front view of the utility model;
[0010] BRIEF DESCRIPTION OF DRAWINGS Figure 2 It is the distribution schematic drawing of water cooling backflow pipe assembly;
[0011] BRIEF DESCRIPTION OF DRAWINGS Figure 3 It is the lateral half sectional view of the utility model;
[0012] BRIEF DESCRIPTION OF DRAWINGS Figure 4 It is the A part of Figure 3 The enlarged view is attached;
[0013] BRIEF DESCRIPTION OF DRAWINGS Figure 5 It is the structure schematic drawing of the open-close board;
[0014] BRIEF DESCRIPTION OF DRAWINGS Figure 6 It is the lateral structure drawing of water cooling backflow pipe assembly;
[0015] BRIEF DESCRIPTION OF DRAWINGS Figure 7 It is the mounting structure drawing of the scraper on the moving frame. DETAILED DESCRIPTION
[0016] The technical scheme of the utility model is further specifically explained below by embodiment, and in conjunction with the drawings.
[0017] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model to a particular orientation, structure and operation.
[0018] Example 1: see Figure 1 , Figure 2 andFigure 3 The biomass gas-fired boiler with water-cooled settling chamber and water-fire tube structure comprises a first furnace body 100, a second furnace body 200 and a heat exchange body 300, the first furnace body is provided with a burner 400, the burner continuously burns with biomass gas as fuel, high-temperature flue gas enters the heat exchange body along the first furnace body and the second furnace body, the heat exchange body is filled with fluid medium, the heat exchange body extends a water-cooled return pipe assembly 500 in the form of wrapping the first furnace body and the second furnace body, see Figure 6 The water-cooled return pipe assembly is composed of a plurality of downcomers 510 and a plurality of risers 520, the lower ends of the downcomers and the lower ends of the risers are communicated with each other, the upper ends of the two are communicated with the inner cavity of the heat exchange body, the interiors of the first furnace body and the second furnace body are formed with a water-cooled settling chamber 600 made of a metal plate, the bottom of the water-cooled settling chamber is provided with a funnel-shaped water-cooled ash hopper 700, the bottom of the water-cooled ash hopper is connected with an ash removal device 800, the risers wrap the water-cooled ash hopper and the left and right sides of the water-cooled settling chamber from bottom to top and are arranged in parallel along the length direction of the first furnace body, the downcomers are located outside the risers; a plurality of horizontal heat exchange flue pipes 310 are arranged in the heat exchange body, one end of the heat exchange flue pipe is communicated with the water-cooled settling chamber in the second furnace body, the other end is connected with an ash cleaning smoke box 320, the outer end of the ash cleaning smoke box is provided with an online ash cleaning machine 330, the ash cleaning smoke box and the online ash cleaning machine are conventional devices and will not be described here.
[0019] In the embodiment, the water-cooled return pipe assembly is arranged to guide the relatively low-temperature medium in the heat exchange body to the outside of the water-cooled settling chamber, the low-temperature medium continuously flows along the downcomers and the risers to continuously take away the heat on the outer wall of the water-cooled settling chamber, the left and right outer sides of the water-cooled settling chamber are both distributed with the risers, so that the high-temperature flue gas takes away a large amount of heat during flowing along the water-cooled settling chamber, the reduction of temperature promotes the condensation and falling of the smoke dust in the flue gas, and also has the effect of pre-heating, the flue gas entering the heat exchange flue pipe has a lower temperature compared with the prior art, so that the coking is not easy to occur, the content of the smoke dust in the flue gas is low, the speed of ash deposition in the heat exchange flue pipe is obviously reduced, and the operation frequency of the online ash cleaning machine is greatly reduced. The ash cleaning machine used in the embodiment adopts a semi-automatic mechanical structure to ensure that each flue pipe can be cleaned separately and the ash cleaning is realized in the state of no shutdown. The ash deposited in the water-cooled settling chamber falls along the water-cooled ash hopper to be collected by the ash removal device.
[0020] See Figure 6 Branch pipes 530 are communicated between the risers on the left and right sides of the water-cooled settling chamber and are located on the upper side of the water-cooled settling chamber. This design can further increase the flow of the medium on the periphery of the water-cooled settling chamber to improve the heat exchange efficiency, the better the cooling effect of the water-cooled settling chamber, the higher the efficiency of the condensation and falling of the smoke dust, and the better the dust removal effect.
[0021] See Figure 4 and Figure 5The bottom of the water-cooled ash hopper is provided with an opening and closing plate 710, the ash removal device comprises a moving frame 810 arranged in the water-cooled settling chamber, an ash receiving groove 820 arranged below the opening and closing plate and a reciprocating mechanism 830 arranged at the bottom of the first furnace body, the reciprocating mechanism 830 is a chain reciprocating mechanism, a connecting rod 840 is connected between the reciprocating mechanism and the moving frame, the connecting rod penetrates through the opening and closing plate, and a scraper 850 abutting against the inner wall of the water-cooled settling chamber is arranged on the moving frame. With the increase of the running time, the inner surface of the water-cooled ash hopper and the inner surface of the water-cooled settling chamber will form accumulated ash, and if the thickness of the accumulated ash is too thick, the heat exchange will be seriously affected, thereby causing the cooling effect of the water-cooled settling chamber to be greatly reduced. Therefore, the ash removal device arranged in the embodiment is driven by the reciprocating mechanism arranged outside the water-cooled settling chamber, the moving frame is moved through the connecting rod, and the opening and closing plate is arranged, so that the opening and closing plate can be closed when the ash removal device does not work, and the relative airtightness of the water-cooled settling chamber is maintained.
[0022] See Figure 7 In order to ensure that the scraper abuts against the metal plate, a torsional spring seat 860 is arranged on the moving frame, the scraper is fixed on the torsional spring seat, and the torsional spring seat tends to turn outward, so that the scraper can abut against the metal plate in real time. Meanwhile, the scrapers on the moving frame are bidirectionally distributed, so that the moving frame can scrape off the accumulated ash when moving back and forth. The scraper can be selected from ceramic blades, and has the effects of high temperature resistance and deformation resistance.
[0023] The opening and closing plate comprises two turnover plates 711 rotationally connected to the bottom of the water-cooled ash hopper, the turnover plates are provided with notches 712 capable of accommodating the connecting rods at the ends away from the burners, and the bottom of the first furnace body is provided with two air cylinders 713 for controlling the turnover of the two turnover plates.
[0024] It is obvious to those skilled in the art that the utility model can be changed in many ways, and such changes are not considered to be out of the scope of the utility model. All such modifications obvious to those skilled in the art will be included in the scope of the present claims.
Claims
1. A biomass gas fired boiler with water cooled settling chamber and water fire tube structure comprising a first furnace, a second furnace and a heat exchanging body, the first furnace is provided with a burner, characterized in that: The heat exchange body extends a water-cooled return pipe assembly wrapped on the first furnace body and the second furnace body, the water-cooled return pipe assembly is composed of several downcomers and several upcomers, the lower ends of the downcomers and the lower ends of the upcomers are communicated with each other, the upper ends of both are communicated with the inner cavity of the heat exchange body, the inside of the first furnace body and the second furnace body is formed with a water-cooled settling chamber made of metal plate, the bottom of the water-cooled settling chamber is provided with a funnel-shaped water-cooled ash bucket, the bottom of the water-cooled ash bucket is connected with an ash removal device, the upcomers are wrapped on the left and right sides of the water-cooled ash bucket and the water-cooled settling chamber from bottom to top, and are arranged in parallel along the length direction of the first furnace body, and the downcomers are located outside the upcomers; the heat exchange body is provided with several horizontal heat exchange flues, one end of the heat exchange flues is communicated with the water-cooled settling chamber in the second furnace body, and the other end is connected with an ash cleaning smoke box, and the outer end of the ash cleaning smoke box is provided with an online ash cleaning machine.
2. The biomass gas fired boiler with water cooled settling chamber of water fire tube construction as claimed in claim 1 wherein: The upcomers between the left and right sides of the water-cooled settling chamber are communicated with branch pipes, and the branch pipes are located on the upper side of the water-cooled settling chamber.
3. The biomass gas fired boiler with water cooled settling chamber of water fire tube construction as claimed in claim 1 wherein: The bottom of the water-cooled ash bucket is provided with an opening and closing plate, the ash removal device comprises a moving frame arranged in the water-cooled settling chamber, an ash receiving groove arranged below the opening and closing plate, and a reciprocating mechanism arranged at the bottom of the first furnace body, a connecting rod is connected between the reciprocating mechanism and the moving frame, the connecting rod penetrates the opening and closing plate, and a scraper is arranged on the moving frame and abuts against the inner wall of the water-cooled settling chamber.
4. The biomass gas fired boiler with water cooled settling chamber and water fire tube structure as claimed in claim 3 wherein: A torsional spring seat is arranged on the moving frame, the scraper is fixed on the torsional spring seat, and the torsional spring seat tends to turn outward.
5. The biomass gas fired boiler with water cooled settling chamber of water fire tube construction as claimed in claim 3 wherein: The opening and closing plate comprises two turnover plates rotatably connected to the bottom of the water-cooled ash bucket, a notch for accommodating the connecting rod is formed in the end of the turnover plate away from the burner, and the bottom of the first furnace body is provided with two air cylinders for controlling the turning of the two turnover plates.