An inner and outer double-layer heat storage boiler

Abstract

The present invention discloses an inner-outer double-layer heat storage boiler, comprising a boiler body, wherein an inner boiler and an outer boiler are arranged inside the boiler body; the inner boiler and the outer boiler are arranged concentrically, and the upper and lower sides of the inner boiler and the outer boiler are respectively closed by sealing plates; and an annular smoke outlet area is left between the outer wall of the inner boiler and the inner wall of the outer boiler, and the overall structure of the boiler body is the innermost circular inner boiler. In the present invention, the traditional boiler assembly is set as an inner-outer double-layer structure, the smoke outlet area is set in the middle, and smoke inlet holes are set on both side walls, so that the smoke generated by the combustion of the two boilers enters the smoke outlet area from the smoke inlet holes on both sides, and is then discharged from the smoke outlet holes on the sealing plate at the upper end of the smoke outlet area. After such a setting, a heat exchange structure is correspondingly installed in the smoke outlet area, so that the heat exchange structure is correspondingly surrounded by smoke in the smoke outlet area, effectively increasing the heat exchange efficiency and quality.

Description

Technical Field

[0001] The invention relates to the technical field of heat storage equipment, in particular to an inner and outer double-layer heat storage boiler. Background Art

[0002] In the prior art, heat utilization in a boiler is usually achieved by providing a circle of wound heat exchange tubes on the outside of the boiler body, in which heat exchange oil or hot water is provided for heat exchange, and the heat generated by combustion in the boiler is stored through heat exchange with a mixed heat medium.

[0003] This existing structural form can usually only absorb the heat generated by the outer wall of the boiler, and the heat of the flue gas in the boiler can no longer be used for heat exchange and energy storage during the smoke discharge process. The heat in the flue gas mostly needs to be connected to the external heat exchange equipment through the flue gas pipe, and then exchanged through the flue gas treatment heat exchange equipment.

[0004] However, this type of heat exchange equipment has the most heat in the flue gas when it is discharged, but a lot of heat is wasted when it reaches the treatment equipment through the flue gas pipeline, which will seriously waste the heat of the boiler. The existing equipment can neither effectively utilize the heat inside the boiler nor the heat discharged by the flue gas, and needs to be improved.

[0005] Therefore, in order to solve the above problems, it is necessary to develop an inner and outer double-layer heat storage boiler with a reasonable structure and improved heat exchange efficiency and quality. Summary of the Invention

[0006] The purpose of the present invention is to provide an inner and outer double-layer heat storage boiler to address the deficiencies in the prior art. The technical solution is as follows:

[0007] An inner-outer double-layer heat storage boiler comprises an inner boiler and an outer boiler disposed within the boiler body; the inner boiler and the outer boiler are arranged concentrically, and the upper and lower sides of the inner boiler and the outer boiler are respectively closed by sealing plates; an annular smoke outlet area is left between the outer wall of the inner boiler and the inner wall of the outer boiler, and the overall structure of the boiler body comprises an innermost circular inner boiler, an annular smoke outlet area in the middle, and an outer annular outer boiler; a smoke outlet hole is provided at the sealing plate position at the upper end of the smoke outlet area, and a smoke collection area is provided on the outer wall of the outer boiler extending upward, and smoke is discharged from the smoke collection area;

[0008] Smoke inlet holes are provided on the outer wall of the inner boiler and the inner wall of the outer boiler, and a heat exchange structure is also provided in the smoke outlet area. Burner assemblies are installed on the corresponding lower sealing plates of the inner boiler and the outer boiler. The burner assembly introduces natural gas into the boiler for combustion. The flue gas generated after combustion in the inner boiler enters the smoke outlet area from the inner smoke inlet hole, and the flue gas generated after combustion in the outer boiler enters the smoke outlet area from the outer smoke inlet hole. After the flue gas exchanges heat with the heat exchange structure in the smoke outlet area, it enters the smoke collection area from the smoke outlet hole and is discharged accordingly.

[0009] Furthermore, the heat exchange structure includes a spiral heat exchange tube and a spiral heat exchange plate; a spiral heat exchange plate is installed in the smoke outlet area, and the inner and outer ends of the spiral heat exchange plate are respectively fixed to the outer wall of the inner boiler and the inner wall of the outer boiler. When the smoke from the inner boiler and the outer boiler enters the smoke outlet area, the smoke rises along the spiral heat exchange plate to the smoke outlet and is discharged;

[0010] A spiral heat exchange tube is installed correspondingly on the spiral heat exchange plate. The spiral heat exchange tube is installed as the spiral heat exchange plate spirally rises, and the upper and lower ends of the spiral heat exchange tube are correspondingly welded and fixed on the upper and lower spiral heat exchange plates, and a smoke outlet gap is left between the left and right sides of the spiral heat exchange tube and the outer wall of the inner boiler and the inner wall of the outer boiler. After the smoke enters the smoke outlet area from the smoke inlet, the smoke is located in the smoke outlet gaps on the left and right sides. The smoke on both sides surrounds the spiral heat exchange tube in the middle, and the smoke spirals upward and is discharged from the smoke outlet.

[0011] Furthermore, the positions of the smoke inlet holes on the outer wall of the inner boiler and the smoke inlet holes on the inner wall of the outer boiler are consistent, and the smoke from the inner and outer sides can enter the smoke outlet gap at the same position at the same time.

[0012] Furthermore, baffles are correspondingly provided in the inner boiler and the outer boiler. Each boiler has two annular baffles, which are staggered up and down so that the flue gas is deflected from top to bottom and enters from the smoke inlet below the smoke outlet area.

[0013] Furthermore, the outer wall of the outer boiler is also provided with a closed shell, and a spiral heat exchange tube is also installed in the closed shell. The spiral heat exchange tube and the spiral heat exchange tube in the smoke outlet area are correspondingly installed with a water inlet pipe and a water outlet pipe.

[0014] Furthermore, the inner boiler has a burner assembly installed at the middle position of the lower cover plate; and the outer boiler has four burner assemblies installed at corresponding positions of the lower cover plate with even intervals.

[0015] Furthermore, an air induction device and a corresponding smoke treatment device are installed on the outside of the smoke collection area.

[0016] Beneficial effects: The present invention has the following beneficial effects:

[0017] 1) In the present invention, the traditional boiler assembly is configured as an inner and outer double-layer structure, with the smoke outlet area located in the middle and smoke inlet holes provided on both side walls. The smoke generated by the combustion of the two boilers then enters the smoke outlet area from the smoke inlet holes on both sides and is then discharged from the smoke outlet holes on the sealing plate at the upper end of the smoke outlet area. With this configuration, a heat exchange structure is installed in the smoke outlet area. This allows the heat exchange structure to be surrounded by the smoke in the smoke outlet area, effectively increasing heat exchange efficiency and quality.

[0018] 2) The present invention has a detailed design of the heat exchange structure. First, a spiral heat exchange plate is provided. The spiral heat exchange plate is made of a heat-conducting material and fixed on both sides to the furnace walls of the two boilers, so that heat can be conducted through the boiler side walls on both sides. Secondly, a spiral heat exchange tube is installed on the spiral heat exchange plate. The spiral heat exchange tube also has a spiral rising structure, and the upper and lower ends of the spiral heat exchange tube are welded and fixed to the spiral heat exchange plate. On the one hand, this is to fix the spiral heat exchange tube and stabilize the structure; on the other hand, it is to ensure that the heat on the spiral heat exchange plate can be effectively transferred to the spiral heat exchange tube, effectively increasing heat exchange.

[0019] 3) The present invention sets the width of the smoke outlet area accordingly. After the spiral heat exchange tube is welded and fixed, a smoke outlet gap needs to be left at the position of the two side areas of the spiral heat exchange tube. The setting of the smoke outlet gap is very clever and reasonable. If the smoke outlet gap is not set, the smoke on both sides cannot be discharged after entering. After setting the smoke outlet gap, on the one hand, the smoke can be discharged in an upward spiral, and on the other hand, the spiral heat exchange tube can be surrounded from both sides. The upper and lower sides of the spiral heat exchange tube are heat-transferred through the upper and lower spiral heat exchange plates. The left and right sides are heat-exchanged by the smoke on both sides. The spiral heat exchange tube is heat-transferred in all directions, effectively increasing the heat exchange efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present invention;

[0021] Figure 2 for Figure 1 Middle BB cross-section;

[0022] Figure 3 This is a schematic diagram of the boiler body in the present invention;

[0023] Figure 4 for Figure 3 Middle AA section view;

[0024] Among them, there are a boiler body 1; an inner boiler 2; an outer boiler 3; a sealing plate 4; a smoke outlet area 5; a smoke outlet hole 6; a smoke collecting area 7; a smoke inlet hole 8; a spiral heat exchange tube 9; a spiral heat exchange plate 10; a smoke outlet gap 11; a baffle 12; a closed shell 13; a burner assembly 14; a water inlet pipe 15; a water outlet pipe 16; an induced draft device 17; and a flue gas treatment device 18. DETAILED DESCRIPTION

[0025] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solutions of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0026] like Figure 1 and Figure 2 As shown, an inner and outer double-layer heat storage boiler includes a boiler body 1, an inner boiler 2 and an outer boiler 3 are arranged inside the boiler body 1; the inner boiler 2 and the outer boiler 3 are arranged concentrically, and the upper and lower sides of the inner boiler 2 and the outer boiler 3 are respectively closed by sealing plates 4; and an annular smoke outlet area 5 is left between the outer wall of the inner boiler 2 and the inner wall of the outer boiler 3. The overall structure of the boiler body 1 is an innermost circular inner boiler 2, an annular smoke outlet area 5 on the middle side, and an outer annular outer boiler 3; and a smoke outlet hole 6 is provided at the position of the sealing plate 4 at the upper end of the smoke outlet area 5, and a smoke collecting area 7 is provided on the outer wall of the outer boiler 3, extending upward, and the smoke is discharged from the smoke collecting area 7;

[0027] like Figure 3 and Figure 4 As shown, smoke inlet holes 8 are provided on the outer wall of the inner boiler 2 and the inner wall of the outer boiler 3, and a heat exchange structure is also provided in the smoke outlet area 5. Burner assemblies 14 are installed on the corresponding lower sealing plates 4 of the inner boiler 2 and the outer boiler 3. The burner assembly 14 introduces natural gas into the boiler for combustion. The flue gas generated after the combustion of the inner boiler 2 enters the smoke outlet area 5 from the inner smoke inlet hole 8, and the flue gas generated after the combustion of the outer boiler 3 enters the smoke outlet area 5 from the outer smoke inlet hole 8. After the smoke gas exchanges heat with the heat exchange structure in the smoke outlet area 5, it enters the smoke collection area 7 from the smoke outlet hole 6 and is discharged accordingly.

[0028] The heat exchange structure includes a spiral heat exchange tube 9 and a spiral heat exchange plate 10. The spiral heat exchange plate 10 is installed in the smoke outlet area 5. The inner and outer ends of the spiral heat exchange plate 10 are respectively fixed to the outer wall of the inner boiler 2 and the inner wall of the outer boiler 3. When the smoke from the inner boiler 2 and the outer boiler 3 enters the smoke outlet area 5, the smoke rises along the spiral heat exchange plate 10 to the smoke outlet 6 and is discharged.

[0029] A spiral heat exchange tube 9 is installed on the spiral heat exchange plate 10. The spiral heat exchange tube 9 is installed as the spiral heat exchange plate 10 rises in a spiral manner, and the upper and lower ends of the spiral heat exchange tube 9 are correspondingly welded and fixed to the spiral heat exchange plates 10 on the upper and lower sides. A smoke outlet gap 11 is left between the left and right sides of the spiral heat exchange tube 9 and the outer wall of the inner boiler 2 and the inner wall of the outer boiler 3. After the flue gas enters the smoke outlet area 5 from the smoke inlet 8, the smoke is located in the smoke outlet gaps 11 on the left and right sides. The smoke on both sides surrounds the spiral heat exchange tube 9 in the middle, and the smoke rises in a spiral upward and is discharged from the smoke outlet 6.

[0030] The positions of the smoke inlet holes 8 on the outer wall of the inner boiler 2 and the smoke inlet holes 8 on the inner wall of the outer boiler 3 are consistent, and the smoke from the inner and outer sides can enter the smoke outlet gap 11 at the same position at the same time.

[0031] Baffles 12 are correspondingly provided in the inner boiler 2 and the outer boiler 3. The baffles 12 in each boiler are provided with two annular pieces. The two baffles 12 are staggered up and down so that the flue gas is deflected from top to bottom and enters from the smoke inlet 8 below the smoke outlet area 5.

[0032] The outer wall of the outer boiler 3 is further provided with a closed shell 13, and the closed shell 13 is also installed with a spiral heat exchange tube 9. The spiral heat exchange tube 9 and the spiral heat exchange tube 9 in the smoke outlet area 5 are both installed with a water inlet pipe 15 and a water outlet pipe 16 respectively.

[0033] The inner boiler 2 has a burner assembly 14 installed at the middle position of the lower cover plate 4 ; and the outer boiler has four burner assemblies 14 installed at corresponding positions of the lower cover plate 4 with even spacing.

[0034] An air induction device 17 and a corresponding smoke treatment device 18 are also installed on the outside of the smoke collection area 7 .

[0035] The specific working process of the present invention is as follows: In the present invention, the traditional boiler assembly is set as an inner and outer double-layer structure, including a circular inner boiler and an outer annular boiler on the outside, and an empty smoke outlet area is set between the inner and outer boilers. The smoke outlet area is also set in a ring shape and is just embedded in the interior of the two boilers. The traditional boiler structure is mostly that the smoke is directly discharged from the upper end after direct combustion in the furnace body; while the present invention sets the smoke outlet area in the middle, and both side walls are provided with smoke inlet holes, so the smoke generated by the combustion of the two boilers enters the smoke outlet area from the smoke inlet holes on both sides, and is then discharged from the smoke outlet holes on the sealing plate at the upper end of the smoke outlet area.

[0036] The purpose of this arrangement is to install a heat exchange structure in the smoke outlet area, so that the heat exchange structure is surrounded by smoke in the smoke outlet area, effectively increasing the heat exchange efficiency and quality.

[0037] The present invention focuses on the design of the heat exchange structure in the smoke outlet area; first, a spiral heat exchange plate is set up. On the one hand, the spiral heat exchange plate is made of heat-conducting material, and its two sides are fixed on the furnace walls of the two boilers respectively, so that heat can be conducted through the boiler side walls on both sides; on the other hand, the spiral heat exchange plate is installed by bolts, so a spiral rising channel is formed in the smoke outlet area, and the smoke enters the area of ​​the spiral heat exchange plate from both sides and moves upward along the spiral.

[0038] Furthermore, a spiral heat exchange tube is installed on the spiral heat exchange plate based on the spiral heat exchange plate. The spiral heat exchange tube also has a spiral rising structure, and the upper and lower ends of the spiral heat exchange tube are correspondingly welded and fixed on the spiral heat exchange plate. On the one hand, it is to fix the spiral heat exchange tube and stabilize the structure; on the other hand, it is to enable the heat on the spiral heat exchange plate to be effectively transferred to the spiral heat exchange tube.

[0039] And the width of the smoke outlet area needs to be set accordingly. After the spiral heat exchange tube is welded and fixed, a smoke outlet gap needs to be left at the position of the two sides of the spiral heat exchange tube. The setting of the smoke outlet gap is very clever and reasonable. If the smoke outlet gap is not set, the smoke on both sides cannot be discharged after entering. After setting the smoke outlet gap, on the one hand, the smoke can be discharged in an upward spiral, and on the other hand, the spiral heat exchange tube can be surrounded from both sides. The upper and lower sides of the spiral heat exchange tube are heat-transferred through the upper and lower spiral heat exchange plates; while the left and right sides are heat-exchanged through the smoke on both sides, and the spiral heat exchange tube is heat-exchanged in all directions, effectively increasing the heat exchange efficiency and quality.

[0040] Moreover, the smoke outlet area is integrally embedded between the inner boiler and the outer boiler. The structural setting is very clever. The smoke can be heat exchanged when it comes out. The structural setting is very reasonable.

[0041] In addition, the present invention also provides a deflector to deflect the flue gas downward. Most of the flue gas will enter from the smoke inlet at the lower end of the smoke outlet area and then move upward in a spiral. The structure is reasonably set up, and the external induced draft fan can effectively lead out the flue gas and prevent the flue gas from gathering. The number and position of the burner components of the inner boiler and the outer boiler are set accordingly, and the structure is reasonable.

[0042] The above specific implementation method is only a preferred embodiment of the present invention and is not intended to limit the implementation of the present invention and the scope of the claims. All equivalent changes and modifications made based on the content of the patent protection scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. An inner and outer double-layer heat storage boiler, characterized in that: The invention comprises a boiler body (1), wherein an inner boiler (2) and an outer boiler (3) are arranged inside the boiler body (1); the inner boiler (2) and the outer boiler (3) are arranged concentrically, and the upper and lower sides of the inner boiler (2) and the outer boiler (3) are respectively closed by sealing plates (4); and an annular smoke outlet area (5) is left between the outer wall of the inner boiler (2) and the inner wall of the outer boiler (3); the overall structure of the boiler body (1) is an innermost circular inner boiler (2), an annular smoke outlet area (5) on the middle side and an outer annular outer boiler (3); and a smoke outlet hole (6) is provided at the position of the sealing plate (4) at the upper end of the smoke outlet area (5), and a smoke collecting area (7) is provided on the outer wall of the outer boiler (3) extending upward, and smoke is discharged from the smoke collecting area (7); The outer wall of the inner boiler (2) and the inner wall of the outer boiler (3) are both provided with a smoke inlet (8), and a heat exchange structure is also provided in the smoke outlet area (5). The corresponding lower sealing plates (4) of the inner boiler (2) and the outer boiler (3) are both provided with a burner assembly (14). The burner assembly (14) introduces natural gas into the boiler for combustion. The smoke generated by the combustion of the inner boiler (2) enters the smoke outlet area (5) from the inner smoke inlet (8), and the smoke generated by the combustion of the outer boiler (3) enters the smoke outlet area (5) from the outer smoke inlet (8). After the smoke exchanges heat with the heat exchange structure in the smoke outlet area (5), the smoke enters the smoke collection area (7) from the smoke outlet (6) and is discharged accordingly. The heat exchange structure comprises a spiral heat exchange tube (9) and a spiral heat exchange plate (10); a spiral heat exchange plate (10) is installed in the smoke outlet area (5), and the inner end and the outer end of the spiral heat exchange plate (10) are respectively fixed to the outer wall of the inner boiler (2) and the inner wall of the outer boiler (3); when the smoke in the inner boiler (2) and the outer boiler (3) enters the smoke outlet area (5), the smoke rises along the spiral heat exchange plate (10) to the smoke outlet (6) and is discharged; The spiral heat exchange tube (9) is correspondingly installed on the spiral heat exchange plate (10), and the spiral heat exchange tube (9) is installed along with the spiral heat exchange plate (10) in a spiral manner, and the upper and lower ends of the spiral heat exchange tube (9) are correspondingly welded and fixed on the upper and lower spiral heat exchange plates (10), and a smoke outlet gap (11) is left between the left and right sides of the spiral heat exchange tube (9) and the outer wall of the inner boiler (2) and the inner wall of the outer boiler (3). After the smoke enters the smoke outlet area (5) from the smoke inlet (8), the smoke is located in the smoke outlet gaps (11) on the left and right sides, and the smoke on both sides surrounds the spiral heat exchange tube (9) in the middle. The smoke rises in a spiral manner and is discharged from the smoke outlet (6); The outer wall of the outer boiler (3) is further provided with a closed shell (13), and a spiral heat exchange tube (9) is also installed in the closed shell (13). The spiral heat exchange tube (9) and the spiral heat exchange tube (9) in the smoke outlet area (5) are both correspondingly installed with a water inlet pipe (15) and a water outlet pipe (16).

2. The inner and outer double-layer heat storage boiler according to claim 1, characterized in that: The positions of the smoke inlet holes (8) on the outer wall of the inner boiler (2) and the smoke inlet holes (8) on the inner wall of the outer boiler (3) are consistent, and the smoke from the inner and outer sides can simultaneously enter the smoke outlet gap (11) at the same position.

3. The inner and outer double-layer heat storage boiler according to claim 2, characterized in that: The inner boiler (2) and the outer boiler (3) are both provided with baffles (12) correspondingly. The baffles (12) in each boiler are provided with two annular pieces. The two baffles (12) are staggered up and down so that the smoke is deflected from top to bottom and enters from the smoke inlet (8) below the smoke outlet area (5).

4. The inner and outer double-layer heat storage boiler according to claim 3 is characterized in that: The inner boiler (2) has a burner assembly (14) correspondingly installed at the middle position of the lower sealing plate (4); and the outer boiler (3) has four burner assemblies (14) installed at corresponding positions of the lower sealing plate (4).

5. The inner and outer double-layer heat storage boiler according to claim 3 is characterized in that: An air induction device (17) and a corresponding smoke treatment device (18) are also installed on the outside of the smoke collection area (7).

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