CN217004409U

CN217004409U - Pipe frame type waste heat boiler

Info

Publication number: CN217004409U
Application number: CN202220739971.8U
Authority: CN
Inventors: 董骏鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-07-19
Anticipated expiration: 2032-04-01

Abstract

The utility model discloses a pipe frame type waste heat boiler, which comprises a boiler barrel and a pipe frame communicated with the boiler barrel, wherein the pipe frame comprises an upper collecting box arranged on one side of the boiler barrel, a lower collecting box arranged below the upper collecting box corresponding to the upper collecting box, and a downcomer arranged between the upper collecting box and the lower collecting box; be provided with diaphragm type wall flue gas on the pipe support room of crossing, be provided with flue inlet pipe connector on its preceding lateral wall, be provided with flue blast pipe connector on the lateral wall of back, the middle part is provided with the diaphragm type wall mid-board that the bottom overflows, preceding lateral wall, the top of back lateral wall and diaphragm type wall mid-board all communicates with last header, preceding lateral wall, the bottom of back lateral wall and diaphragm type wall mid-board all communicates with lower header, and diaphragm type wall flue gas crosses indoor multistage over heater, multistage evaporation convection bank and multistage economizer bank of tubes of having set gradually along the flue gas trend of crossing. The utility model has the advantages of simple structure, low steel consumption, safety, reliability, strong universality, reasonable flue gas flow, tight flue gas sealing and the like.

Description

Pipe frame type waste heat boiler

Technical Field

The utility model relates to the technical field of waste heat boilers, in particular to a pipe frame type waste heat boiler.

Background

The gas waste heat boiler is a device for generating steam or hot water wind by utilizing a gas waste heat medium. The universality of the waste heat boiler comprises two aspects of applicability of the boiler to waste heat gas media and applicability of a waste heat boiler structure to steam parameter change of the waste heat boiler. The applicability of the gas waste heat medium mainly comprises medium temperature, flue gas content, ash content, acidic or corrosive medium containing SOx and the like. The steam parameters of the waste heat boiler mainly comprise main parameters such as evaporation capacity, steam temperature and steam pressure.

The gas waste heat boiler is a main type of waste heat boiler, and has various types at present, and under the conditions of acid or corrosive media such as different gas medium temperatures, flue gas content, ash content, SOx content and the like, the boiler generally has the disadvantages of poor sealing performance, easy ash accumulation, complex structure and the like. With the change of the main parameters of the waste heat boiler, such as evaporation capacity, steam temperature, steam pressure and the like, especially the change of the pressure of the waste heat boiler from low to high, the heating surface structure and the manufacturing process of the waste heat boiler are changed, so that the types of the waste heat boilers with different pressures are different, and the universality is poor.

Secondly, the existing gas waste heat boiler generally has the defects of poor sealing performance, low interchangeability of heating surfaces, complex or unreasonable flow structure and the like, the steel consumption is increased by an independent bearing steel structure, the consumption of common furnace wall refractory materials is huge, and the thermal inertia of the waste heat boiler is huge.

Disclosure of Invention

In order to solve the above problems, the present invention provides a tube frame type exhaust-heat boiler, which specifically adopts the following technical scheme:

the pipe frame type waste heat boiler comprises a boiler barrel and a pipe frame communicated with the boiler barrel, wherein the pipe frame comprises an upper collecting box arranged on one side of the boiler barrel, a lower collecting box arranged below the upper collecting box corresponding to the upper collecting box, and a down pipe arranged between the upper collecting box and the lower collecting box; be provided with diaphragm type wall flue gas on the pipe support and flow through the room, be provided with flue inlet pipe interface on the preceding lateral wall of diaphragm type wall flue gas flow through the room, be provided with flue blast pipe interface on the back lateral wall of diaphragm type wall flue gas flow through the room, the middle part of diaphragm type wall flue gas flow through the room is provided with the diaphragm type wall mid-board that the bottom overflows, the top of preceding lateral wall, back lateral wall and diaphragm type wall mid-board all communicates with last header, and the bottom of preceding lateral wall, back lateral wall and diaphragm type wall mid-board all communicates with lower header, and diaphragm type wall flue gas flow through indoor multistage over heater, multistage evaporation convection bank and the multistage economizer bank of tubes of having set gradually along the flue gas trend.

And a steam-water communicating pipe is arranged between the boiler barrel and the upper header.

And the bottom of the membrane wall flue gas flowing chamber is provided with a dust collecting hopper.

The multistage superheater and the multistage evaporation convection bank are arranged between the front side wall and the diaphragm wall intermediate wall, the multistage economizer bank is arranged between the diaphragm wall intermediate wall and the rear side wall, and the multistage superheater is arranged in front of the multistage evaporation convection bank along the flue gas flow.

The multi-stage superheater, the multi-stage evaporation convection tube bundle and the multi-stage economizer tube bundle are all tube bundles arranged in the horizontal direction.

The pipe support is communicated with a hanging pipe support penetrating through the inner cavity of the membrane wall flue gas overflowing chamber, and the hanging pipe support is used for connecting and fixing the multistage superheater, the multistage evaporation convection tube bundle and the multistage economizer tube bundle.

The pipe support is also provided with a stair and a stair platform which are positioned outside the membrane wall flue gas flow-through chamber.

The pipe frame type waste heat boiler provided by the utility model has the characteristics of simple structure, low steel consumption, safety, reliability, strong universality, reasonable flue gas flow, tight flue gas sealing and the like, and has the advantages that compared with the prior art, the pipe frame type waste heat boiler has the advantages that:

1) the waste heat boiler frame structure formed by a boiler barrel and a pipe frame is as follows: the boiler barrel is vertically arranged outside the boiler, is not heated, has reasonable pressure bearing characteristic, is suitable for various high-pressure and low-pressure boiler parameters, and is easy to realize serialization; the pipe frame has the double functions of meeting the requirements of boiler water circulation and boiler support, and compared with a common waste heat boiler, the pipe frame simplifies the boiler structure and saves about 35% of steel;

2) the sealing structure comprises a membrane wall front wall, a membrane wall middle partition wall, a membrane wall rear wall, two membrane wall side walls and the like: the water cooling wall and the partition wall of the boiler all adopt a full-film wall with best sealing performance and a light pipe laying furnace wall, the air leakage rate is extremely low, the heat loss of smoke exhaust is reduced, the heat efficiency is improved, the consumption of refractory heat-insulating materials is low, the boiler has very low thermal inertia, the steam (heat) generation is fast, the boiler can not generate vaporization when the boiler is suddenly stopped and has power failure, and the boiler is safe and reliable;

3) hanging the pipe frame structure: the support or hanging structure of the boiler heating surface parts such as the multi-stage superheater, the multi-stage evaporation convection tube bundle, the multi-stage economizer tube bundle and the like is simplified, and the boiler heating surface function is realized;

4) versatility of heat exchange: boiler heating surface parts such as a multi-level superheater, a multi-level evaporation convection tube bundle and a multi-level economizer tube bundle are horizontal tube bundles, and can be exchanged according to main parameter requirements such as evaporation capacity, steam temperature and steam pressure of the waste heat boiler, so that the waste heat boiler has strong universality under the condition that the overall structure is not changed.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a view from a-a of fig. 1.

Fig. 3 is a view from B-B of fig. 1.

Fig. 4 is a top view of fig. 1.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and give detailed implementation manners and specific working procedures, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1-4, the tube rack type waste heat boiler of the present invention comprises a boiler barrel 1 and a tube rack communicated with the boiler barrel, wherein the tube rack comprises an upper header 21 arranged at one side of the boiler barrel 1, a lower header 22 arranged below the upper header 21 corresponding to the upper header, and a downcomer 23 arranged between the upper header 21 and the lower header 22, and a steam-water communicating tube 24 is usually arranged between the boiler barrel 1 and the upper header 21. The flue gas overflow chamber is characterized in that a membrane wall flue gas overflow chamber with an upper inlet and an upper outlet of two-pass chambers and a light pipe laying heat insulation layer outside is arranged on the pipe frame, a flue inlet pipe port a is arranged on a front side wall 31 of the membrane wall flue gas overflow chamber, a flue exhaust pipe port b is arranged on a rear side wall 32 of the membrane wall flue gas overflow chamber, a membrane wall middle partition wall 33 with an overflowing bottom is arranged in the middle of the membrane wall flue gas overflow chamber, the tops of the front side wall 31, the rear side wall 32, the left side wall, the right side wall and the membrane wall middle partition wall 33 are communicated with an upper header 21, the bottoms of the front side wall 31, the rear side wall 32 and the membrane wall middle partition wall 33 are communicated with a lower header 22, and a multi-stage superheater 41, a multi-stage evaporation convection tube bundle 42 and a multi-stage economizer 43 are sequentially arranged in the membrane wall flue gas overflow chamber along the flue gas trend. Wherein the multi-stage superheater 41 and the multi-stage evaporative convection bank 42 are disposed between the front side wall 31 and the diaphragm wall intermediate wall 33, the multi-stage economizer bank 43 is disposed between the diaphragm wall intermediate wall 33 and the rear side wall 32, and generally, the multi-stage superheater 41 is disposed in front of the multi-stage evaporative convection bank 42 along the flue gas flow path. The multistage superheater 41, the multistage evaporation convection bank 42 and the multistage economizer bank 43 are all banks arranged in the horizontal direction, and can be interchanged according to the requirements of main parameters such as evaporation capacity, steam temperature and steam pressure of the waste heat boiler, so that the waste heat boiler has strong universality under the condition that the overall structure is not changed. For convenient installation, a door-shaped hanging pipe frame 5 is installed on the pipe frame, the top of the hanging pipe frame 5 is communicated with a steam-water communicating pipe 24, two leg pipes penetrate through the inner cavity of the membrane wall flue gas flow-through chamber and are communicated with the down pipes 23 on two sides, and the multi-stage superheater 41, the multi-stage evaporation convection pipe bundle 42 and the multi-stage economizer pipe bundle 43 can be conveniently connected and fixed with the multi-stage superheater, the multi-stage evaporation convection pipe bundle 42 and the multi-stage economizer pipe bundle 43 through clamping pieces. In addition, the bottom of the membrane wall flue gas flowing chamber is provided with a dust collecting hopper 6 for storing the ash separated from the flowing flue gas. In order to facilitate maintenance, the pipe frame is also provided with a stair 7 and a stair platform which are positioned outside the membrane wall flue gas flow-through chamber.

The flue gas medium flow of the waste heat boiler is as follows:

a flue gas medium enters a first return stroke in the membrane wall flue gas overflowing chamber from a flue inlet pipe joint a, sequentially enters a multi-stage superheater 41 and a multi-stage evaporation convection tube bundle 42, then enters a second return stroke in the membrane wall flue gas overflowing chamber through an overflowing port at the bottom of a membrane wall middle partition wall 33, and is discharged from a flue exhaust pipe joint b after flowing through a multi-stage economizer tube bundle 43; the ash separated from the flue gas flowing through the lower part of each return stroke is accumulated in the lower ash collecting hopper 6 for periodic cleaning.

The steam-water flow of the waste heat boiler comprises the following steps:

the waste heat boiler feed water enters the boiler barrel 1 of natural circulation through the economizer, then enters the lower header 22 through the downcomer 23 of the pipe frame, then respectively enters the front side wall 31, the rear side wall 32, the left and right side walls and the diaphragm wall mid-partition wall 33 of the diaphragm wall flue gas flow chamber, the multistage evaporation convection tube bundle 42 and the tubes of the hanging pipe frame 5, forms a steam-water mixture after absorbing heat, flows upwards to enter the upper header 21 and the steam-water communicating tubes 24 of the pipe frame, then enters the boiler barrel 1 for steam-water separation, and the separated water is continuously circulated and is supplied for steam.

The flue gas flow chamber with the furnace wall membrane wall in the embodiment can be set to be a flue gas flow mode with more than two chambers according to specific working conditions, and the positions of the inlet and the outlet of the flue gas medium and the actual installation positions of the multi-stage superheater 41, the multi-stage evaporation convection tube bundle 42 and the multi-stage economizer tube bundle 43 can be changed accordingly.

It should be noted that in the description of the present invention, terms of orientation or positional relationship such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Claims

1. A tube frame type exhaust-heat boiler is characterized in that: the boiler comprises a boiler barrel and a pipe frame communicated with the boiler barrel, wherein the pipe frame comprises an upper collecting box arranged on one side of the boiler barrel, a lower collecting box arranged below the upper collecting box corresponding to the upper collecting box, and a descending pipe arranged between the upper collecting box and the lower collecting box; be provided with diaphragm type wall flue gas on the pipe support and flow through the room, be provided with flue inlet pipe interface on the preceding lateral wall of diaphragm type wall flue gas flow through the room, be provided with flue blast pipe interface on the back lateral wall of diaphragm type wall flue gas flow through the room, the middle part of diaphragm type wall flue gas flow through the room is provided with the diaphragm type wall mid-board that the bottom overflows, the top of preceding lateral wall, back lateral wall and diaphragm type wall mid-board all communicates with last header, and the bottom of preceding lateral wall, back lateral wall and diaphragm type wall mid-board all communicates with lower header, and the diaphragm type wall flue gas flows through indoor multistage over heater, multistage evaporation convection bank and the multistage economizer bank of tubes of having set gradually along the flue gas trend.

2. The tube rack type waste heat boiler of claim 1, characterized in that: and a steam-water communicating pipe is arranged between the boiler barrel and the upper header.

3. The tube rack type exhaust-heat boiler of claim 1, characterized in that: and the bottom of the membrane wall flue gas flowing chamber is provided with a dust collecting hopper.

4. The tube rack type exhaust-heat boiler of claim 1, characterized in that: the multistage superheater and the multistage evaporation convection bank are arranged between the front side wall and the diaphragm wall intermediate wall, the multistage economizer bank is arranged between the diaphragm wall intermediate wall and the rear side wall, and the multistage superheater is arranged in front of the multistage evaporation convection bank along the flue gas flow.

5. The tube rack type waste heat boiler of claim 1, characterized in that: the multistage superheater, the multistage evaporation convection tube bundle and the multistage economizer tube bundle are all tube bundles arranged in the horizontal direction.

6. The tube rack type waste heat boiler of claim 5, characterized in that: the hanging pipe support that the membrane wall flue gas overflows the indoor chamber is communicated on the pipe support, the hanging pipe support is used for connecting and fixing a multistage superheater, a multistage evaporation convection bank and a multistage economizer bank.

7. The tube rack type exhaust-heat boiler of claim 1, characterized in that: the pipe support is also provided with a stair and a stair platform which are positioned outside the membrane wall flue gas flow-through chamber.