Biomass boiler burner

Abstract

A biomass boiler burner comprises membrane walls on the left side and the right side, the upper ends of heat exchange water pipes on the membrane walls are connected to an upper collecting box, the lower ends of the heat exchange water pipes on the membrane walls are connected to a left collecting pipe and a right collecting pipe on the two sides respectively, a feeding pipe is fixedly arranged at the top of the burner, and a front heat exchange pipe row and a rear heat exchange pipe row are fixedly arranged in front of and behind a discharging pipe in a combustion chamber respectively. The upper ends of a plurality of heat exchange tubes of the front heat exchange tube row are communicated with the upper collecting box, the lower ends of the heat exchange tubes are connected to the first collecting tube, and a plurality of heat exchange plates on the front heat exchange tube row are sealed through plates; the two ends of the first collecting pipe are communicated to the membrane walls on the two sides; the upper ends of a plurality of heat exchange tubes of the rear heat exchange tube row are communicated with the upper header, the lower ends of the heat exchange tubes of the rear heat exchange tube row are connected to the second header, the two ends of the second header are communicated to the membrane walls on the two sides, and the upper portion of the rear heat exchange tube row is an upper inclined section inclining backwards from top to bottom and the lower portion of the rear heat exchange tube row is a lower inclined section inclining backwards from top to bottom. And a gap for fuel to pass through is formed between the rear heat exchange tube row and the first collecting tube. The combustor is sufficient in combustion.

Description

Technical Field

[0001] The utility model relates to a biomass heat exchanger, in particular to a biomass boiler burner, and belongs to the technical field of biomass heat exchange equipment. Background Art

[0002] The burner configured on the biomass boiler can be manufactured separately, and some can also be manufactured together with the furnace body. At present, a common form of biomass boiler burner is the burner shown in Chinese application No. 202222012444.X (a biomass burner), which includes a feed pipe, the lower end of which is connected to a combustion chamber, the front wall and the rear wall of the combustion chamber are both sandwich walls, and a steam drum in the front and rear directions is installed in the middle of the top of the combustion chamber. The steam drum is connected to the sandwich wall of the front wall and the rear wall. Two water collecting pipes are fixedly installed on both sides of the bottom. The front and rear of the two water collecting pipes are connected by connecting pipes. The interlayer wall is connected to the water collecting pipes. The side walls and top of the combustion chamber are membrane walls composed of multiple heat exchange pipes. The lower ends of the heat exchange pipes in the membrane walls are connected to the water collecting pipes, and the upper ends are connected to the steam drum through upward and inward inclined pipes. One of the water collecting pipes is connected to a water inlet pipe, and the steam drum is connected to a steam outlet pipe. A liquid level gauge installation pipe is installed between the steam outlet pipe and one of the water collecting pipes. Chinese patent CN220601486U The burner wall of a disclosed high-efficiency biomass vertical steam generator also adopts a sandwich structure, and the inner wall is a membrane wall, which is connected to the upper header. This burner can preheat the incoming air and cool the inner wall of the burner through the interlayer, thereby achieving a good combustion effect while ensuring the service life of the burner. In actual use, it is found that coking will occur when the above-mentioned biomass fuel is not burned fully, and the above-mentioned biomass burner generally needs to be equipped with a screw feeder to control the combustion speed. The feed speed is adjusted by adjusting the running speed of the screw feeder, and the control is relatively cumbersome. Summary of the invention

[0003] The purpose of the utility model is to overcome the technical problems existing in the above-mentioned biomass burner and provide a biomass boiler burner.

[0004] In order to achieve the purpose of the utility model, the following technical scheme is adopted: a biomass boiler burner includes membrane walls on left and right sides, the upper ends of the heat exchange water pipes on the membrane walls are connected to the upper header, and the lower ends are respectively connected to the left header and the right header on both sides, the outer side of the membrane wall is closed with an outer wall, a sandwich is formed between the membrane wall and the outer wall, the outer wall has a blower interface, and a plurality of air holes are opened on the membrane wall in the sandwich, a feed pipe is fixedly arranged on the top of the burner, the feed pipe passes through the upper header, and a front heat exchange tube row and a rear heat exchange tube row are respectively fixedly arranged before and after the discharge pipe in the combustion chamber, the upper ends of the plurality of heat exchange tubes of the front heat exchange tube row are connected to the upper header, and the lower ends are connected to the first header, and the plurality of heat exchange plates on the front heat exchange tube row are connected between It is closed by a plate; the first header is located below the down pipe, and both ends of the first header are connected to the membrane walls on both sides; the upper ends of the multiple heat exchange tubes of the rear heat exchange tube row are connected to the upper header, and the lower ends are connected to the second header, and both ends of the second header are connected to the membrane walls on both sides, or the two ends of the second header are respectively connected to the left header and the right header, the upper part of the rear heat exchange tube row is an upper inclined section inclined from top to bottom and backward, and the lower part is a lower inclined section inclined from top to bottom and backward, and there is a gap between the rear heat exchange tube row and the first header for fuel to pass through, a hopper is installed on the feed pipe outside the burner, a plug valve is installed on the hopper, a grate is arranged at the lower part of the combustion chamber, the water inlet of the burner is located on the left header or the right header, and the burner is output from the upper header.

[0005] Furthermore; the front heat exchange tube row is connected to the front wall of the burner, the front wall of the burner is also a front wall interlayer, the front wall interlayer is connected to the upper collecting box, the front part of the front heat exchange tube row is a horizontal section, and behind the horizontal section is an inclined section that slopes downward from front to back, and the front and rear of the first collecting pipe are correspondingly within the range of the upper inclined section.

[0006] Furthermore, the feed pipe extends into the burner, and the lower end surface of the feed pipe is an inclined surface, which is parallel to the inclined section.

[0007] Furthermore, a lead screw is connected to the gate valve, and the opening of the gate valve is driven by the lead screw.

[0008] Furthermore, a pull-out drawer is provided at the lower part of the combustion chamber, and the grate is fixedly connected in the drawer.

[0009] The positive and beneficial technical effects of the utility model are: the burner has full combustion, is not prone to coking, and is easy to clean, which will be specifically explained in conjunction with a specific implementation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the burner being matched with the furnace body.

[0011] Figure 2 It is a schematic diagram of the interior of the burner after being cut vertically in the front and rear directions.

[0012] Figure 3 It is a schematic diagram after removing the outer wall of the membrane wall.

[0013] Figure 4 It is a schematic diagram of the interior of the burner after being cut vertically from left to right. DETAILED DESCRIPTION

[0014] In order to more fully explain the implementation of the utility model, implementation examples of the utility model are provided. These implementation examples are only for the purpose of illustrating the utility model and do not limit the scope of the utility model.

[0015] The present invention is further explained in detail in conjunction with the accompanying drawings, in which the marks are: 1: membrane wall; 2: left header; 3: upper header; 4: outer wall; 5: blower interface; 6: hopper; 7: gate valve; 8: screw; 9: push-pull drawer; 10: grate; 11: base; 12: burner; 13: furnace body; 14: feed pipe; 15: front heat exchange tube row; 16: front wall interlayer; 17: horizontal section; 18: inclined section; 19: first header; 20: rear heat exchange tube row; 21: front inclined section; 22: rear inclined section; 23: second header; 24: air hole; 25: right header; 26: interlayer.

[0016] Figure 1 The schematic diagram of the burner 12 and the furnace body 13 is shown in FIG. 1 . The furnace body 13 is a common furnace body. It should be noted that the burner can be manufactured as an independent component and combined with different furnace bodies. Figure 1 This is not a necessary combination for the burner. When the burner is manufactured separately, the water inlet pipeline is connected to the left header or the right header, and the output pipeline is connected to the upper header, and the rear end of the combustion chamber of the burner is connected to the heat exchange chamber of the furnace body.

[0017] A biomass boiler burner comprises a membrane wall 1 on left and right sides, the upper end of a heat exchange water pipe on the membrane wall is connected to an upper header box, and the lower end is respectively connected to a left header 2 and a right header 25 on both sides, an outer wall 4 is enclosed on the outer side of the membrane wall, an interlayer 26 is formed between the membrane wall and the outer wall, a blower interface 5 is provided on the outer wall, a plurality of air holes 24 are provided on the membrane wall in the interlayer, a feed pipe 14 is fixedly arranged on the top of the burner, the feed pipe 14 passes through the upper header box, the feed pipe extends into the burner, a hopper 6 is installed on the feed pipe outside the burner, a gate valve 7 is installed on the hopper 6, a lead screw 8 is connected to the gate valve, the gate valve is opened by driving the gate valve by the lead screw, the fuel can fall at a uniform speed by gravity, and a more complicated screw feeder and control are no longer required.

[0018] A front heat exchange tube row 15 and a rear heat exchange tube row 20 are fixedly arranged in front and behind the discharge tube in the combustion chamber, respectively. The upper ends of the multiple heat exchange tubes of the front heat exchange tube row are connected to the upper header, and the lower ends are connected to the first header. In this embodiment, the front heat exchange tube row is connected to the front wall of the burner, and the front wall of the burner is a front wall interlayer. 16 shows the front wall interlayer, and the front wall interlayer 16 is connected to the upper header. The front part of the front heat exchange tube row is a horizontal section 17, and behind the horizontal section is an inclined section 18 inclined downward from front to rear. The multiple heat exchange plates on the front heat exchange tube row are closed by plates; the lower end face of the feed pipe is an inclined surface, which is parallel to the inclined surface. The discharge pipe falls on the front heat exchange tube row and falls through the gap. The first header is located below the discharge pipe 14. The two ends of the first header are connected to the membrane walls on both sides. When the fuel falls on the front heat exchange tube row, the plate acts as a material stopper, and the fuel falls from the end of the first header. The first header does not affect the discharge.

[0019] The upper ends of the multiple heat exchange tubes of the rear heat exchange tube row 20 are connected to the upper header, and the lower ends are connected to the second header 23. The two ends of the second header are connected to the membrane walls on both sides, or the two ends of the second header are respectively connected to the left header and the right header. The upper part of the rear heat exchange tube row is an upper inclined section 21 inclined from top to bottom and backward, and the lower part is a lower inclined section 22 inclined from top to bottom and backward. The front and rear of the first header are correspondingly within the range of the upper inclined section. There is a gap between the rear heat exchange tube row and the first header for fuel to pass through. The fuel falls from the gap and is accumulated and burned at the lower part of the lower inclined section. At this time, the lower inclined section plays the role of a "grate" to achieve reverse burning (burning under the "grate" formed by the lower inclined section) and normal burning (burning on the pull-out grate), so that the combustion is more complete and the coking and ash content are reduced.

[0020] A pull-out drawer 9 is provided at the bottom of the combustion chamber, and a grate 10 is fixedly connected in the drawer. This makes it convenient to clean the ash.

[0021] The high-temperature flue gas after combustion by the burner is output to the heat exchange chamber in the furnace body through the rear part of the combustion chamber.

[0022] After describing the implementation mode of the utility model in detail, people familiar with the technology can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the scope of the technical solution of the utility model, and the utility model is not limited to the implementation mode of the examples given in the specification.

Claims

1. A biomass boiler burner, comprising membrane walls on left and right sides, the upper ends of the heat exchange water pipes on the membrane walls are connected to the upper header, and the lower ends are respectively connected to the left header and the right header on both sides, the outer side of the membrane wall is closed with an outer wall, a sandwich is formed between the membrane wall and the outer wall, a blower interface is provided on the outer wall, a plurality of air holes are opened on the membrane wall in the sandwich, a feed pipe is fixedly arranged on the top of the burner, and the feed pipe passes through the upper header, characterized in that: A front heat exchange tube row and a rear heat exchange tube row are fixedly arranged in front and behind the discharge pipe in the combustion chamber, respectively, and the upper ends of the multiple heat exchange tubes of the front heat exchange tube row are connected to the upper header box, and the lower ends are connected to the first header. The first header is located below the discharge pipe, and both ends of the first header are connected to the membrane walls on both sides; the upper ends of the multiple heat exchange tubes of the rear heat exchange tube row are connected to the upper header box, and the lower ends are connected to the second header. Both ends of the second header are connected to the membrane walls on both sides, or the two ends of the second header are connected to the left header and the right header respectively. The upper part of the rear heat exchange tube row is an upper inclined section inclined backward from top to bottom, and the lower part is a lower inclined section inclined backward from top to bottom. There is a gap between the rear heat exchange tube row and the first header for fuel to pass through. A hopper is installed on the feed pipe outside the burner, and a gate valve is installed on the hopper. A grate is arranged at the lower part of the combustion chamber, and the water inlet of the burner is located on the left header or the right header, and the burner is output from the upper header.

2. A biomass boiler burner according to claim 1, characterized in that: The front heat exchange tube row is connected to the front wall of the burner, the front wall of the burner is a front wall interlayer, the front wall interlayer is connected to the upper header, the front part of the front heat exchange tube row is a horizontal section, and behind the horizontal section is an inclined section that slopes downward from front to back, and the front and rear of the first header are correspondingly within the range of the upper inclined section.

3. A biomass boiler burner according to claim 1, characterized in that: The feed pipe extends into the burner, and the lower end surface of the feed pipe is an inclined surface, which is parallel to the inclined section.

4. A biomass boiler burner according to claim 1, characterized in that: A lead screw is connected to the gate valve, and the opening of the gate valve is driven by the lead screw.

5. The biomass boiler burner according to claim 1, characterized in that: A pull-out drawer is arranged at the lower part of the combustion chamber, and the grate is fixedly connected in the drawer.

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