Boiler waste heat evaporator

Abstract

The utility model discloses a boiler waste heat evaporator, which belongs to the technical field of evaporators and comprises a pipeline. The evaporation heat exchange assembly comprises mounting frames, annular frames, annular pipes, fins and an evaporation pipeline, the two mounting frames are fixedly connected into the pipeline, the annular frames are fixedly connected to the inner sides of the two mounting frames, annular grooves are formed in the annular frames, the annular pipes are coaxially, hermetically and rotatably connected into the annular grooves, and the fins are arranged on the annular pipes. According to the utility model, the evaporation heat exchange assembly is arranged, so that the evaporation pipeline is rotatably arranged on the annular frame through the annular pipe, and when high-temperature boiler flue gas flows through the pipeline, the flue gas pushes a plurality of fins on the annular frame, so that the evaporation pipeline rotates on the annular frame along with the annular pipe; therefore, the contact effect of the evaporation pipeline and the flue gas is improved, the heat exchange effect of the evaporation pipeline and the flue gas is improved, and the heat loss of the discharged flue gas is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of evaporators, and in particular relates to a boiler waste heat evaporator. Background Art

[0002] Boiler evaporator is a device that uses the waste heat of the boiler to reduce the loss of waste heat and improve the thermal efficiency of the boiler, thereby reducing energy consumption and improving work efficiency. Boiler evaporator is usually installed in the boiler flue to absorb the waste heat of the flue gas in the boiler flue and reduce waste heat loss.

[0003] Chinese utility model application number CN202321505568.X discloses an evaporator for utilizing waste heat from boiler flue gas, in which a steam pipe group is installed in a pipe through a bracket, and heat is exchanged with high-temperature flue gas through the steam pipe group. In this method, the structure of the steam pipe group is fixed, and the flue gas can easily pass directly through the gap of the steam pipe group, thereby reducing the utilization effect of the waste heat of the flue gas. Utility Model Content

[0004] The utility model aims to provide a boiler waste heat evaporator to solve the problem in the traditional technology that the steam pipe group structure is fixed and the flue gas can easily pass through the gap of the steam pipe group directly, which reduces the utilization effect of the flue gas waste heat.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A boiler waste heat evaporator, comprising:

[0007] Flue;

[0008] An evaporative heat exchange component, the evaporative heat exchange component comprises a mounting frame, an annular frame, an annular pipe, fins and an evaporative pipe, two mounting frames are fixedly connected in the flue, annular frames are fixedly connected to the inner sides of the two mounting frames, an annular groove is provided in the annular frame, an annular pipe is coaxially sealed and rotatably connected in the annular groove, the outer side of the annular pipe is connected to the inner side of the annular groove, an evaporative pipe is connected between the two annular pipes, and a plurality of fins are fixedly connected to the annular pipe through a support;

[0009] The evaporator water inlet pipe and the evaporator water outlet pipe are sealed and extend into the flue and communicate with the outer peripheral side of the annular groove below. The evaporator water outlet pipe is sealed and extends into the flue and communicates with the outer peripheral side of the annular groove above.

[0010] Preferably, the annular tube is provided with a plurality of through holes, wherein the annular tube is connected with the annular groove through the plurality of through holes.

[0011] Preferably, the plurality of fins are distributed in a spiral shape, and the spiral axis is coaxially arranged with the pipeline axis.

[0012] Preferably, the evaporation pipe includes a water inlet main pipe, multiple bends and a water outlet main pipe, the water inlet main pipe and the water outlet main pipe are connected with multiple bends, the end of the water inlet main pipe away from the multiple bends is connected with the annular pipe below, and the end of the water outlet main pipe away from the multiple bends is connected with the annular pipe above.

[0013] Preferably, a plurality of paddles are fixedly connected to the outer peripheral side of the annular tube located at the bottom, and the evaporator water inlet pipe and the annular groove communicating end are axially tangent to the annular groove.

[0014] Preferably, the evaporator water inlet pipe and the evaporator water outlet pipe are both equipped with control valves at one end outside the flue, wherein the end of the evaporator water inlet pipe away from the flue is connected to the external water supply end, and the end of the evaporator water outlet pipe away from the flue is connected to the boiler steam drum through a pipe fitting.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. In the utility model, an evaporation heat exchange component is arranged so that the evaporation pipe can be rotatably arranged on the annular frame through an annular pipe. When the high-temperature boiler smoke flows through the pipe, the smoke pushes the multiple wings on the annular frame, so that the evaporation pipe rotates on the annular frame with the annular pipe, thereby improving the contact effect between the evaporation pipe and the smoke, and then improving the heat exchange effect between the evaporation pipe and the smoke, and reducing the heat loss of the exhaust smoke.

[0017] 2. In the utility model, a toggle plate is provided. When water flows through the evaporator water inlet pipe and enters the annular groove on the annular frame, the water flow pushes the toggle plate on the annular tube to rotate the annular tube, thereby maintaining the rotation effect of the evaporation pipe, further improving the rotation stability of the evaporation pipe, and maintaining the heat exchange effect between the evaporation pipe and the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the flue of the utility model;

[0020] Figure 3 It is a schematic cross-sectional view of the lower annular frame portion of the utility model;

[0021] Figure 4 This is a schematic diagram of the evaporation pipeline structure of the utility model.

[0022] In the figure: 1 flue, 2 mounting frame, 3 annular frame, 4 annular groove, 5 annular pipe, 51 through hole, 6 fins, 7 evaporation pipe, 8 water inlet pipe, 9 multiple elbows, 10 water outlet pipe, 11 pipe connecting frame, 12 evaporator water inlet pipe, 13 evaporator water outlet pipe, 14 toggle plate, 15 control valve. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-Figure 4 , a boiler waste heat evaporator, comprising:

[0025] Flue 1: used to conduct the high-temperature flue gas generated by the boiler.

[0026] The evaporative heat exchange component includes a mounting frame 2, an annular frame 3, an annular tube 5, fins 6 and an evaporation pipe 7. The two mounting frames 2 are fixedly connected in the flue 1. The inner sides of the two mounting frames 2 are fixedly connected with an annular frame 3. An annular groove 4 is provided in the annular frame 3. An annular tube 5 is coaxially and rotatably connected in the annular groove 4. The outer side of the annular tube 5 is connected with the inner side of the annular groove 4. A plurality of through holes 51 are provided on the annular tube 5, wherein the annular tube 5 is connected with the annular groove 4 through the plurality of through holes 51.

[0027] An evaporation pipe 7 is connected between the two annular tubes 5 , and a plurality of fins 6 are fixedly connected to the annular tube 5 via struts. The plurality of fins 6 are all distributed in a spiral shape, and the axial direction of the spiral is coaxial with the axial direction of the flue 1 .

[0028] The evaporator water inlet pipe 12 and the evaporator water outlet pipe 13, the evaporator water inlet pipe 12 is sealed and extends into the flue 1, and is communicated with the outer peripheral side of the annular groove 4 below, and the evaporator water outlet pipe 13 is sealed and extends into the flue 1, and is communicated with the outer peripheral side of the annular groove 4 above.

[0029] The evaporation pipe 7 includes a water inlet main pipe 8, a plurality of elbow pipes 9 and a water outlet main pipe 10. The water inlet main pipe 8 and the water outlet main pipe 10 are connected with a plurality of elbow pipes 9. The end of the water inlet main pipe 8 away from the plurality of elbow pipes 9 is connected with the annular pipe 5 below, and the end of the water outlet main pipe 10 away from the plurality of elbow pipes 9 is connected with the annular pipe 5 above.

[0030] A plurality of paddle plates 14 are fixedly connected to the outer peripheral side of the annular tube 5 located below, and the communicating end of the evaporator water inlet pipe 12 and the annular groove 4 is tangent to the annular groove 4 in the axial direction.

[0031] The direction in which the water flow through the evaporator water inlet pipe 12 pushes the paddle 14 to rotate the annular tube 5 is the same as the direction in which the smoke through the flue 1 pushes the wing 6 to rotate the annular tube 5 .

[0032] The evaporator water inlet pipe 12 and the evaporator water outlet pipe 13 are both installed with a control valve 15 at one end outside the flue 1, wherein the evaporator water inlet pipe 12 is connected to the external water supply end at the end away from the flue 1, and the evaporator water outlet pipe 13 is connected to the boiler steam drum at the end away from the flue 1 through a pipe fitting.

[0033] The operating principle of the utility model is now described as follows:

[0034] During operation, the high-temperature boiler flue gas flows through the flue 1. Under the driving effect of the flue gas on the plurality of fins 6, the evaporation pipe 7 rotates with the annular pipe 5 on the annular frame 3, thereby improving the contact effect between the evaporation pipe 7 and the flue gas, thereby improving the heat exchange effect between the evaporation pipe 7 and the flue gas, and reducing the heat loss of the exhaust flue gas.

[0035] During the rotation of the evaporation pipe 7, the external water supply end supplies heat exchange medium to the annular groove 4 through the evaporator water inlet pipe 12, and the heat exchange medium flows into the annular pipe 5 through the multiple through holes 51 on the annular pipe 5. During the rotation, the lower annular pipe 5, the evaporation pipe 7 and the upper annular pipe 5 are always connected. The heat exchange medium flows from the lower annular pipe 5 into the evaporation pipe 7, and flows to the evaporator water outlet pipe 12 through the upper annular pipe 5, and finally flows to the boiler drum;

[0036] At the same time, when the water flows into the annular groove 4 on the annular frame 3 through the evaporator water inlet pipe 12, the water flows impacting the paddle piece 14 on the annular tube 5, pushing the annular tube 5 to rotate, thereby maintaining the rotation effect of the evaporation pipe 7, further improving the rotation stability of the evaporation pipe 7, and maintaining the heat exchange effect between the evaporation pipe 7 and the flue gas.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A boiler waste heat evaporator, characterized in that: include: Flue (1); An evaporative heat exchange component, the evaporative heat exchange component comprising a mounting frame (2), an annular frame (3), an annular tube (5), fins (6) and an evaporative pipe (7), wherein two mounting frames (2) are fixedly connected in a flue (1), the inner sides of the two mounting frames (2) are both fixedly connected to an annular frame (3), an annular groove (4) is provided in the annular frame (3), an annular tube (5) is coaxially sealed and rotatably connected in the annular groove (4), the outer side of the annular tube (5) is connected to the inner side of the annular groove (4), the evaporative pipe (7) is connected between the two annular tubes (5), and a plurality of fins (6) are fixedly connected to the annular tube (5) via a support; An evaporator water inlet pipe (12) and an evaporator water outlet pipe (13), wherein the evaporator water inlet pipe (12) is sealed and extends into the flue (1) and is in communication with the outer peripheral side of the annular groove (4) below, and the evaporator water outlet pipe (13) is sealed and extends into the flue (1) and is in communication with the outer peripheral side of the annular groove (4) above.

2. A boiler waste heat evaporator according to claim 1, characterized in that: in: The annular tube (5) is provided with a plurality of through holes (51), wherein the annular tube (5) is in communication with the annular groove (4) via the plurality of through holes (51).

3. The boiler waste heat evaporator according to claim 1, characterized in that: in: The plurality of fins (6) are distributed in a spiral shape, and the spiral axis is coaxially arranged with the flue (1) axis.

4. The boiler waste heat evaporator according to claim 1, characterized in that: in: The evaporation pipe (7) comprises a water inlet main pipe (8), a plurality of bend pipes (9) and a water outlet main pipe (10); the plurality of bend pipes (9) are connected between the water inlet main pipe (8) and the water outlet main pipe (10); an end of the water inlet main pipe (8) away from the plurality of bend pipes (9) is connected to the annular pipe (5) below; and an end of the water outlet main pipe (10) away from the plurality of bend pipes (9) is connected to the annular pipe (5) above.

5. The boiler waste heat evaporator according to claim 1, characterized in that: in: A plurality of paddle plates (14) are fixedly connected to the outer peripheral side of the annular tube (5) located below, and the end of the evaporator water inlet pipe (12) communicating with the annular groove (4) is axially tangent to the annular groove (4).

6. The boiler waste heat evaporator according to claim 1, characterized in that: in: The evaporator water inlet pipe (12) and the evaporator water outlet pipe (13) are both provided with a control valve (15) at one end located outside the flue (1), wherein the end of the evaporator water inlet pipe (12) away from the flue (1) is connected to an external water supply end, and the end of the evaporator water outlet pipe (13) away from the flue (1) is connected to the boiler drum via a pipe fitting.

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