SP boiler structure

Abstract

The utility model discloses an SP boiler structure which comprises an SP boiler and a steam pocket, a superheater, an evaporator and a coal economizer are sequentially arranged in the SP boiler from top to bottom, the coal economizer is connected with a water supply pipe, an outlet of the coal economizer and an inlet of the superheater are both connected with the steam pocket, and the steam pocket is connected with the evaporator. A steam outlet pipe is arranged at an outlet of the superheater, the economizer comprises an upper tube bundle collecting box, a lower tube bundle collecting box and a plurality of snakelike coil pipes, the snakelike coil pipes are arranged between the upper tube bundle collecting box and the lower tube bundle collecting box in an array mode, a plurality of installation cross beams are arranged in the SP boiler in parallel, and a plurality of connecting lug plates are arranged at the bottoms of the installation cross beams. A plurality of vertical pipe clamps are arranged on the S-shaped coil pipe, the top ends of the vertical pipe clamps are connected with the connecting lug plate, and a rapping mechanism used for being matched with the vertical pipe clamps is arranged on the SP boiler; the device has the advantages of high heat energy utilization rate, convenience in ash removal and simple structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers, and in particular relates to an SP boiler structure. Background Art

[0002] The steam drum is a cylindrical pressure vessel used in water-tube boilers for steam-water separation and steam purification, forming a water circulation loop and storing boiler water. Its primary function is to receive water from the economizer, separate it from the water, supply it to the circulation loop, and deliver saturated steam to the superheater. The drum holds a certain amount of water, providing a certain amount of heat and working fluid storage. This slows down steam pressure fluctuations during operating conditions and acts as a buffer when water supply and load are temporarily out of sync.

[0003] Economizer (English name Economizer) is a device installed in the tail flue of the boiler to recover the waste heat of the exhaust gas. It heats the boiler feed water into a heating surface of saturated water under drum pressure. Because it absorbs the heat of high-temperature flue gas, it reduces the exhaust temperature of the flue gas, saves energy and improves efficiency, so it is called an economizer.

[0004] The SP boiler is an industrial equipment. Its feed water comes from the low-temperature economizer of the AQC boiler. It absorbs heat again to produce superheated steam, which is mixed with the superheated steam from the AQC boiler and then sent to the turbine to generate power.

[0005] A superheater, also known as a steam superheater, is a component in a boiler that heats steam from saturation to superheat. Superheaters can be categorized by heat transfer method: convection, radiation, and semi-radiation. Based on their structural characteristics, they can be divided into serpentine, screen, wall, and wall-wrapped types. All consist of several parallel tubes and inlet and outlet headers.

[0006] An evaporator generally refers to an object that converts liquid substances into gas. It consists of two main parts: a heating chamber and an evaporation chamber. The heating chamber provides the heat required for evaporation, causing the liquid to boil and vaporize; the evaporation chamber completely separates the gas and liquid phases.

[0007] The problem with the existing technology is that the economizer is usually fixedly installed inside the boiler. After use, dust easily accumulates on the surface of the economizer inside the boiler, affecting the heat exchange efficiency between water and flue gas inside the economizer, resulting in low thermal energy utilization; and the dust is inconvenient to clean. Summary of the Invention

[0008] The purpose of the utility model is to provide an SP boiler structure with the advantages of high thermal energy utilization, convenient ash cleaning and simple structure in response to the problems existing in the prior art.

[0009] To achieve the above objectives, the present invention adopts a technical solution: an SP boiler structure, comprising an SP boiler and a steam drum, wherein a flue gas inlet is provided at the top of the SP boiler, and a flue gas outlet is provided at the bottom of the SP boiler. A superheater, an evaporator, and an economizer are sequentially arranged in the SP boiler from top to bottom. The economizer is connected to a water feed pipe, and the outlet of the economizer and the inlet of the superheater are both connected to the steam drum. The steam drum is connected to the evaporator. A steam outlet pipe is provided at the outlet of the superheater. The economizer comprises an upper tube bundle header, a lower tube bundle header, and a plurality of serpentine coils. The plurality of serpentine coil arrays are arranged between the upper tube bundle header and the lower tube bundle header. The SP boiler is provided with a plurality of mounting crossbeams arranged in parallel, and a plurality of connecting lugs are provided at the bottom of the mounting crossbeams. The serpentine coils are provided with a plurality of vertical pipe clamps, and the top ends of the vertical pipe clamps are connected to the connecting lugs. The SP boiler is provided with a rapping mechanism for cooperating with the vertical pipe clamps.

[0010] In the above scheme, the flue gas enters the SP boiler from the flue gas inlet, passes through the superheater, evaporator, and economizer in sequence, and then flows out from the flue gas outlet. The water in the water supply pipe is preheated by the economizer and then enters the steam drum and then flows to the evaporator. The water is evaporated into steam by the evaporator. The steam passes through the steam drum and enters the superheater for superheating and then is discharged from the steam outlet pipe. The upper tube bundle header and the lower tube bundle header of the economizer are used to set the economizer inlet and outlet accordingly. The water in the economizer is dispersed through a number of serpentine coils to fully absorb the heat of the flue gas and improve the thermal energy utilization efficiency. The top of the vertical pipe clamp is connected by installing the connecting ear plate at the bottom of the beam, and the connection and positioning of the serpentine coil is realized by the vertical pipe clamp. The economizer is vibrated and cleaned by the cooperation of the vibrating mechanism and the vertical pipe clamp. The structure is simple, the connection is stable, and the thermal energy utilization rate is improved.

[0011] Furthermore, the vertical pipe clamp includes two pipe clamp units arranged opposite to each other, and the pipe clamp unit includes a connecting rod, on which a plurality of arc-shaped pipe sleeves for cooperating with the serpentine coil are arranged along the length direction. One end of the two pipe clamp units is rotatably connected, and the other end of the two pipe clamp units is connected by a bolt assembly.

[0012] One end of the two pipe clamp units is rotatably connected, and the other end is connected by a bolt assembly, which is convenient for connecting and fixing the serpentine coil. The connecting rod of the pipe clamp unit is used to connect the arc-shaped pipe sleeve. The arc-shaped pipe sleeves on the two pipe clamp units are arranged relative to each other, and the serpentine coil is clamped and positioned when clamped.

[0013] Furthermore, it comprises a rapping mechanism, which comprises a rapping rod capable of reciprocating movement, the rapping rod being provided with a plurality of rapping parts, and the bottom end of the vertical pipe clamp being provided with a force-bearing part for cooperating with the rapping part.

[0014] When the rapping rod moves under force, the rapping part cooperates with the force-bearing part at the bottom end of the vertical pipe clamp to achieve rapping of the serpentine coil and shake off the dust on the serpentine coil. It has a simple structure and good dust removal effect.

[0015] Furthermore, the rapping mechanism includes a mounting seat, the rapping rod is slidably arranged on the mounting seat, and the mounting seat is provided with an elastic part for resetting the rapping rod.

[0016] The rapping rod is slidably connected through the mounting seat so that the rapping rod can move back and forth horizontally, and the rapping rod is reset through the elastic part to facilitate the next rapping.

[0017] Furthermore, the rapping mechanism includes a bearing seat, a rotating shaft is rotatably provided on the bearing seat, a motor for driving the rotating shaft is provided on the bearing seat, a connecting rod is provided on the rotating shaft, and a heavy hammer for cooperating with the end of the rapping rod is provided on the connecting rod.

[0018] The rotating shaft is rotatably connected through the bearing seat, and the rotating shaft is driven to rotate by the motor. The rotating shaft drives the heavy hammer to move through the connecting rod to achieve the impact on the end of the rapping rod.

[0019] Furthermore, a limiting frame is provided at the bottom of the vertical pipe clamp, and a supporting pulley for cooperating with the bottom of the rapping rod is provided on the limiting frame.

[0020] The bottom end of the rapping rod is supported by the supporting pulley on the limiting frame to ensure the structural stability of the rapping rod.

[0021] Furthermore, the serpentine coil includes a plurality of horizontal tubes, and a plurality of heat sinks are provided on the horizontal tubes.

[0022] By arranging fins on the horizontal tubes, the heat exchange area is increased and the heat exchange efficiency is improved.

[0023] Furthermore, an ash hopper is provided at the bottom of the SP boiler.

[0024] An ash hopper is installed at the bottom of the SP boiler to collect the dust inside and facilitate centralized discharge.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. By installing a connecting lug at the bottom of the beam in the SP boiler to cooperate with the vertical pipe clamp on the serpentine coil, the economizer is positioned. The installation structure is simple. The economizer uses several serpentine coil structures to increase the heat exchange area between water and flue gas, thereby improving heat exchange efficiency.

[0027] 2. A vibrating mechanism is provided to cooperate with the vertical pipe clamp to clean the dust on the serpentine coil through vibration, making dust cleaning convenient and allowing the surface of the economizer to come into direct contact with the flue gas, thereby ensuring the thermal energy utilization efficiency of the economizer. The economizer is provided with a serpentine coil structure and a heat sink to increase the heat exchange area with the flue gas and improve the thermal energy utilization rate.

[0028] 3. The motor drives the rotating shaft and the heavy hammer to strike the end of the rapping rod, driving the serpentine coil to vibrate and clean the dust. The elastic part on the mounting seat realizes the reset of the rapping rod. It has a simple structure and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a three-dimensional diagram of the installation structure of the serpentine coil in Example 1 of the present utility model;

[0030] Figure 2 This is a schematic diagram of the overall structure of an SP boiler structure in Example 1 of the present utility model;

[0031] Figure 3 This is a schematic structural diagram of the mounting base in Example 1 of the present utility model;

[0032] Figure 4 This is a structural perspective diagram of the limiting frame in Example 2 of the present utility model;

[0033] In the figure: 1. SP boiler; 2. steam drum; 3. flue gas inlet; 4. flue gas outlet; 5. superheater; 6. evaporator; 7. economizer; 8. water supply pipe; 9. steam outlet pipe; 10. upper tube bundle header; 11. lower tube bundle header; 12. serpentine coil; 13. mounting crossbeam; 14. connecting ear plate; 15. connecting rod; 16. arc-shaped pipe sleeve; 17. bolt assembly; 18. rapping rod; 19. rapping part; 20. force-bearing part; 21. mounting seat; 22. elastic part; 23. bearing seat; 24. rotating shaft; 25. motor; 26. connecting rod; 27. heavy hammer; 28. limit frame; 29. ​​supporting pulley; 30. heat sink; 31. horizontal pipe; 32. ash hopper; 33. T-axis structure; 34. screw. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solution of the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed or operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. Example 1

[0035] like Figure 1-3 As shown, a SP boiler structure includes an SP boiler 1 and a steam drum 2. The top of the SP boiler 1 is provided with a flue gas inlet 3, and the bottom of the SP boiler 1 is provided with a flue gas outlet 4. The SP boiler 1 is provided with a superheater 5, an evaporator 6 and an economizer 7 from top to bottom. The economizer 7 is connected to a water supply pipe 8. The outlet of the economizer 7 and the inlet of the superheater 5 are both connected to the steam drum 2. The steam drum 2 is connected to the evaporator 6. The outlet of the superheater 5 is provided with a steam outlet pipe 9. The economizer 7 comprises an upper tube bundle header 10, a lower tube bundle header 11 and a plurality of serpentine coils 12. The plurality of serpentine coils 12 are arranged in an array between the upper tube bundle header 10 and the lower tube bundle header 11. The SP boiler 1 is provided with a plurality of mounting crossbeams 13 arranged in parallel therein. The bottom of the mounting crossbeams 13 is provided with a plurality of connecting lugs 14. The serpentine coils 12 are provided with a plurality of vertical pipe clamps, the top ends of the vertical pipe clamps being connected to the connecting lugs 14. The SP boiler 1 is provided with a rapping mechanism for cooperating with the vertical pipe clamps.

[0036] In the above scheme, the flue gas enters the SP boiler 1 from the flue gas inlet 3, passes through the superheater 5, the evaporator 6, and the economizer 7 in sequence, and then flows out from the flue gas outlet 4. The water in the water supply pipe 8 is preheated by the economizer 7 and then enters the steam drum 2 and then flows to the evaporator 6. The water is evaporated into steam by the evaporator 6. The steam passes through the steam drum 2 and enters the superheater 5 for superheating and is then discharged from the steam outlet pipe 9. The upper tube bundle header 10 and the lower tube bundle header 11 of the economizer 7 are used to set the economizer 7 inlet and outlet accordingly. The water in the economizer 7 is dispersed through a number of serpentine coils 12 to fully absorb the heat of the flue gas and improve the thermal energy utilization efficiency. The top of the vertical pipe clamp is connected by installing the connecting ear plate 14 at the bottom of the cross beam 13, and the connection and positioning of the serpentine coil 12 are realized by the vertical pipe clamp. The vibration and cleaning of the economizer 7 are realized by cooperating with the vertical pipe clamp through the vibration mechanism. The structure is simple, the connection is stable, and the thermal energy utilization efficiency is improved.

[0037] The SP boiler 1 is equipped with three evaporators 6, arranged in a vertical sequence. Saturated water in the drum 2 enters each evaporator 6, where it is heated and converted into a steam-water mixture. The mixture then returns to the drum 2 for separation. Saturated steam from the upper drum 2 enters the superheater 5, where it is heated and converted into superheated steam at 1.04 MPa and 279°C. The steam then flows to the AQC boiler for further heating. The additional evaporators 6 generate more saturated steam, increasing the steam flow rate within the superheater 5 and facilitating the absorption of more flue gas heat.

[0038] Furthermore, the vertical pipe clamp includes two pipe clamp units arranged opposite to each other, and the pipe clamp unit includes a connecting rod 15. The connecting rod 15 is provided with several arc-shaped pipe sleeves 16 along the length direction for cooperating with the serpentine coil 12. One end of the two pipe clamp units is rotatably connected, and the other end of the two pipe clamp units is connected by a bolt assembly 17.

[0039] One end of the two pipe clamp units is rotatably connected, and the other end is connected by a bolt assembly 17, which is convenient for connecting and fixing the serpentine coil 12. The connecting rod 15 of the pipe clamp unit is used to connect the arc-shaped pipe sleeve 16. The arc-shaped pipe sleeves 16 on the two pipe clamp units are arranged relative to each other, and the serpentine coil 12 is clamped and positioned when clamped.

[0040] A circular sleeve is provided at the top of a pipe clamp unit, which is connected to a fastening bolt and a fastening nut through the circular sleeve, so that when the bottom end of the vertical pipe clamp is acted upon by the vibration mechanism, the serpentine coil 12 is driven to shake, thereby separating and falling the dust.

[0041] Furthermore, it includes a rapping mechanism, which includes a rapping rod 18 that can move back and forth. The rapping rod 18 is provided with a plurality of rapping parts 19 , and the bottom end of the vertical pipe clamp is provided with a force-bearing part 20 for cooperating with the rapping part 19 .

[0042] When the rapping rod 18 is moved by force, the rapping part 19 cooperates with the force-bearing part 20 at the bottom end of the vertical pipe clamp to achieve rapping of the serpentine coil 12 and shake off the dust on the serpentine coil 12. The structure is simple and the dust removal effect is good.

[0043] The rapping part 19 comprises a metal plate fixed on the rapping rod 18 along a linear array, and the force-bearing part 20 comprises a metal plate integrally provided at the bottom end of a pipe clamp unit on one side.

[0044] Furthermore, the rapping mechanism includes a mounting seat 21 , the rapping rod 18 is slidably mounted on the mounting seat 21 , and an elastic portion 22 for resetting the rapping rod 18 is provided on the mounting seat 21 .

[0045] The rapping rod 18 is slidably connected through the mounting seat 21 so that the rapping rod 18 can move back and forth horizontally. The rapping rod 18 is reset through the elastic portion 22 to facilitate the next rapping.

[0046] The elastic portion 22 includes a spring. The mounting seat 21 is located within the side wall of the SP boiler 1, and the rapping rod 18 is installed through the side wall of the SP boiler 1. The end of the rapping rod 18 is provided with a T-shaped shaft structure 33 to cooperate with the mounting seat 21 and limit the length of the rapping rod 18 extending outward.

[0047] Furthermore, the rapping mechanism includes a bearing seat 23, on which a rotating shaft 24 is rotatably provided, a motor 25 for driving the rotating shaft 24 to rotate is provided on the bearing seat 23, a connecting rod 26 is provided on the rotating shaft 24, and a heavy hammer 27 for cooperating with the end of the rapping rod 18 is provided on the connecting rod 26.

[0048] The rotating shaft 24 is rotatably connected through the bearing seat 23 , and the rotating shaft 24 is driven to rotate by the motor 25 . The rotating shaft 24 drives the heavy hammer 27 to move through the connecting rod 26 to achieve the impact on the end of the rapping rod 18 .

[0049] The connecting rod 26 includes a fixed rod, the outer end of the fixed rod is rotatably connected to a movable rod, and the outer end of the movable rod is connected to a heavy hammer 27. A plurality of connecting rods 26 are provided on the rotating shaft 24. The bearing seat 23 is mounted on the inspection platform outside the side wall of the seat 21SP.

[0050] Furthermore, the serpentine coil 12 includes a plurality of horizontal tubes 31 , and a plurality of heat sinks 30 are provided on the horizontal tubes 31 .

[0051] By arranging the heat sink 30 on the horizontal tube 31, the heat exchange area is increased and the heat exchange efficiency is improved.

[0052] Furthermore, an ash hopper 32 is provided at the bottom of the SP boiler 1 .

[0053] An ash hopper 32 is provided at the bottom of the SP boiler 1 to collect the dust inside for convenient centralized discharge. Example 2

[0054] like Figure 4 As shown, the SP boiler structure in this embodiment is further modified as follows based on the embodiment 1:

[0055] Furthermore, a limit frame 28 is provided at the bottom of the vertical pipe clamp, and a support pulley 29 for cooperating with the bottom of the rapping rod 18 is provided on the limit frame 28 .

[0056] The bottom end of the rapping rod 18 is supported by a supporting pulley 29 on the limiting frame 28 to ensure the structural stability of the rapping rod 18 .

[0057] The limiting frame 28 is connected to the bottom end of the vertical pipe clamp by screws 34.

[0058] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A SP boiler structure, comprising an SP boiler and a steam drum, wherein a flue gas inlet is provided at the top of the SP boiler and a flue gas outlet is provided at the bottom of the SP boiler, characterized in that: The SP boiler is provided with a superheater, an evaporator and an economizer from top to bottom. The economizer is connected to a water feed pipe. The outlet of the economizer and the inlet of the superheater are both connected to the steam drum. The steam drum is connected to the evaporator. The outlet of the superheater is provided with a steam outlet pipe. The economizer comprises an upper tube bundle header, a lower tube bundle header and a plurality of serpentine coils. The plurality of serpentine coil arrays are arranged between the upper tube bundle header and the lower tube bundle header. The SP boiler is provided with a plurality of mounting beams arranged in parallel. The bottom of the mounting beams is provided with a plurality of connecting ear plates. The serpentine coil is provided with a plurality of vertical pipe clamps. The top ends of the vertical pipe clamps are connected to the connecting ear plates. The SP boiler is provided with a rapping mechanism for cooperating with the vertical pipe clamps.

2. The SP boiler structure according to claim 1, characterized in that: The vertical pipe clamp includes two pipe clamp units arranged opposite to each other, and the pipe clamp unit includes a connecting rod. A plurality of arc-shaped pipe sleeves for cooperating with the serpentine coil are provided on the connecting rod along the length direction. One end of the two pipe clamp units is rotatably connected, and the other end of the two pipe clamp units is connected by a bolt assembly.

3. The SP boiler structure according to claim 1, characterized in that: The vertical pipe clamp comprises a rapping mechanism, which comprises a rapping rod capable of reciprocating motion. The rapping rod is provided with a plurality of rapping parts. The bottom end of the vertical pipe clamp is provided with a force-bearing part for cooperating with the rapping part.

4. The SP boiler structure according to claim 3, characterized in that: The rapping mechanism comprises a mounting seat, the rapping rod is slidably arranged on the mounting seat, and the mounting seat is provided with an elastic part for resetting the rapping rod.

5. The SP boiler structure according to claim 3, characterized in that: The rapping mechanism includes a bearing seat, a rotating shaft is rotatably provided on the bearing seat, a motor for driving the rotating shaft is provided on the bearing seat, a connecting rod is provided on the rotating shaft, and a heavy hammer for cooperating with the end of the rapping rod is provided on the connecting rod.

6. The SP boiler structure according to claim 3, characterized in that: A limiting frame is provided at the bottom of the vertical pipe clamp, and a supporting pulley for cooperating with the bottom of the rapping rod is provided on the limiting frame.

7. The SP boiler structure according to claim 1, characterized in that: The serpentine coil comprises a plurality of horizontal tubes, and a plurality of heat sinks are arranged on the horizontal tubes.

8. The SP boiler structure according to claim 1, characterized in that: An ash hopper is provided at the bottom of the SP boiler.

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