Inner and outer double-layer type heat storage boiler

Abstract

The invention discloses an inner and outer double-layer heat storage boiler which comprises a boiler body, and an inner-layer boiler and an outer-layer boiler are arranged in the boiler body. The inner-layer boiler and the outer-layer boiler are concentrically arranged, and the upper sides and the lower sides of the inner-layer boiler and the outer-layer boiler are correspondingly sealed through sealing plates; an annular smoke outlet area is reserved between the outer wall of the inner-layer boiler and the inner wall of the outer-layer boiler, and the overall structure of the boiler body is the innermost round inner-layer boiler. A traditional boiler assembly is arranged to be of an inner and outer double-layer structure, the smoke outlet area is arranged in the middle, the smoke inlet holes are formed in the two side walls, smoke generated by combustion of the two boilers correspondingly enters the smoke outlet area from the smoke inlet holes in the two sides and then is exhausted from the smoke outlet holes in the sealing plate at the upper end of the smoke outlet area, and the smoke outlet holes are formed in the sealing plate at the lower end of the smoke outlet area. After the arrangement, the heat exchange structure is correspondingly mounted in the smoke outlet area, so that the heat exchange structure is correspondingly surrounded by smoke in the smoke outlet area, and the heat exchange efficiency and quality are effectively improved.

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 when the flue gas is discharged, but a lot of heat is wasted when it reaches the processing 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 from 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 in view of the shortcomings of the prior art; the technical solution is as follows:

[0007] An inner-outer double-layer heat storage boiler comprises a boiler body, an inner boiler and an outer boiler are arranged inside the boiler body; the inner boiler and the outer boiler are arranged cocentrically, 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 is an innermost circular inner boiler, an annular smoke outlet area on the middle side and an outer annular outer boiler on the outside; a smoke outlet hole is arranged at the sealing plate position at the upper end of the smoke outlet area, and a smoke collecting area is extended upwardly at the outer wall of the outer boiler, and smoke is discharged from the smoke collecting 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 correspondingly 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 smoke generated by the combustion of the inner boiler enters the smoke outlet area from the inner smoke inlet hole, and the smoke generated by the combustion of the outer boiler enters the smoke outlet area from the outer smoke inlet hole. After the smoke exchanges heat with the heat exchange structure in the smoke outlet area, the smoke 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 that rises in a spiral manner is installed in the smoke outlet area, and the inner end and the outer end of the spiral heat exchange plate are respectively fixed on the outer wall of the inner boiler and the inner wall of the outer boiler. When the smoke in 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 correspondingly installed on the spiral heat exchange plate. The spiral heat exchange tube is installed as the spiral heat exchange plate rises in a spiral, 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 correspondingly surrounds the spiral heat exchange tube in the middle, and the smoke rises in a spiral 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 arranged in the inner boiler and the outer boiler, and each boiler has two annular baffles, which are staggered up and down so that the smoke is deflected from top to bottom, and the smoke 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 a corresponding position of the middle position of the lower sealing plate; and the outer boiler has four burner assemblies installed at corresponding positions of the lower sealing plate with even spacing.

[0015] Furthermore, an air induction device and a corresponding smoke treatment device are installed on the outer side 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 set as an inner and outer double-layer structure, the smoke outlet area is set in the middle, and the two 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 then is 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 installed in the smoke outlet area, so that the heat exchange structure is surrounded by smoke in the smoke outlet area, which effectively increases the heat exchange efficiency and quality;

[0018] 2) The present invention has designed a heat exchange structure in detail. First, a spiral heat exchange plate is set. The spiral heat exchange plate is made of heat-conducting material on one hand. Both sides are fixed on the furnace walls of two boilers, and 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 on the basis of the spiral heat exchange plate. The spiral heat exchange tube is also a spiral ascending 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, 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, it is necessary to leave a smoke outlet gap at 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 the smoke outlet gap is set, on the one hand, the smoke can be discharged upward in a spiral manner, 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 through the smoke on both sides. The spiral heat exchange tube is heat-transferred in all directions, which effectively increases 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 section view;

[0022] Figure 3 This is a framework 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 is further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution 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 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 cocentrically, 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, and the overall structure of the boiler body 1 is the innermost circular inner boiler 2, the annular smoke outlet area 5 on the middle side and the outer annular outer boiler 3 on the outer side; and a smoke outlet hole 6 is arranged at the sealing plate 4 at the upper end of the smoke outlet area 5, and a smoke collecting area 7 is extended upwardly at the outer wall of the outer boiler 3, and 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 smoke generated by the combustion of the inner boiler 2 enters the smoke outlet area 5 from the inner smoke inlet hole 8, and the smoke generated by the combustion of the outer boiler 3 enters the smoke outlet area 5 from the outer smoke inlet hole 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 hole 6 upward and is discharged accordingly.

[0028] The heat exchange structure includes 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 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 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;

[0029] The spiral heat exchange tube 9 is installed on the spiral heat exchange plate 10. The spiral heat exchange tube 9 is installed in a spiral manner along with the spiral heat exchange plate 10. 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 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. The smoke on both sides surrounds the spiral heat exchange tube 9 in the middle, and the smoke rises in a spiral manner 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 arranged 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 smoke is deflected from top to bottom, and the smoke enters from the smoke inlet 8 below the smoke outlet area 5.

[0032] The outer wall of the outer boiler 3 is also 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 correspondingly installed with a water inlet pipe 15 and a water outlet pipe 16.

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

[0034] An air induction device 17 and a corresponding smoke treatment device 18 are also installed on the outside of the smoke collecting 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 an annular 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 respectively, and then is discharged from the smoke outlet holes on the sealing plate at the upper end of the smoke outlet area.

[0036] The purpose of such a setting 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. 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 ascending 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 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 transfer heat through the upper and lower spiral heat exchange plates. The left and right sides exchange heat through the smoke on both sides. 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, and the structural setting is very reasonable.

[0041] In addition, the present invention also provides a baffle to deflect the smoke downward, and most of the smoke 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 arranged, and the external induced draft fan can effectively lead out the smoke and prevent the smoke from gathering. The number and position of the burner components of the inner boiler and the outer boiler are correspondingly arranged, and the structure is reasonable.

[0042] The above specific implementation 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 according to 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 boiler body (1) comprises an inner boiler (2) and an outer boiler (3) arranged inside the boiler body (1); the inner boiler (2) and the outer boiler (3) are arranged cocentrically, and the upper and lower sides of the inner boiler (2) and the outer boiler (3) are respectively closed by sealing plates (4); 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) comprises an innermost circular inner boiler (2), an annular smoke outlet area (5) on the middle side and an outer annular outer boiler (3); a smoke outlet hole (6) is arranged at the sealing plate (4) at the upper end of the smoke outlet area (5), and a smoke collecting area (7) is arranged on the outer wall of the outer boiler (3) so as to extend 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 smoke inlet holes (8), and a heat exchange structure is also correspondingly 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 burner assemblies (14), and the burner assemblies (14) introduce 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 holes (8), and the smoke generated by the combustion of the outer boiler (3) enters the smoke outlet area (5) from the outer smoke inlet holes (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 holes (6) and is discharged accordingly.

2. The inner and outer double-layer heat storage boiler according to claim 1 is characterized in that: 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 hole (6) and is discharged; A spiral heat exchange tube (9) is correspondingly installed on the spiral heat exchange plate (10). 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 to the spiral heat exchange plates (10) on the upper and lower sides, 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 hole (8), the smoke is located in the smoke outlet gaps (11) on the left and right sides, and the smoke on both sides correspondingly surrounds the spiral heat exchange tube (9) in the middle. The smoke rises in a spiral manner upward and is discharged from the smoke outlet hole (6).

3. The inner and outer double-layer heat storage boiler according to claim 2 is 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.

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

5. The inner and outer double-layer heat storage boiler according to claim 4 is characterized in that: The outer wall of the outer boiler (3) is also 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).

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

7. The inner and outer double-layer heat storage boiler according to claim 4 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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