CN214223047U

CN214223047U - Wear-resisting and suspension structure for heating surface of waste heat boiler

Info

Publication number: CN214223047U
Application number: CN202022694159.1U
Authority: CN
Inventors: 李鹏飞; 杨梦达
Original assignee: Shanghai Industrial Boiler Wuxi Co ltd
Current assignee: Shanghai Industrial Boiler Wuxi Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-09-17
Anticipated expiration: 2030-11-19

Abstract

The utility model relates to the technical field of waste heat boilers, in particular to a waste heat boiler heating surface anti-abrasion and suspension structure, an inlet header and an outlet header are communicated through a convection finned tube bundle, on the cross section of the convection finned tube bundle, the convection finned tube bundle is arranged in a plurality of rows and a plurality of columns, the sequential connecting lines of all the adjacent two rows of convection finned tube bundles are in a wave line type, the anti-abrasion finned tube bundle is arranged in two rows and a plurality of columns, the uppermost end of each row of the convection finned tube bundle corresponds to an anti-abrasion finned tube bundle, the sequential connecting lines of all the two rows of anti-abrasion finned tube bundles are in a wave line type, a plurality of pipe clamp units are sleeved on the convection finned tube bundle and the anti-abrasion finned tube bundle of each row, each pipe clamp unit comprises a pipe clamp and a batten, each convection tube bundle fin and the anti-abrasion finned tube bundle of each row are sleeved with a pipe clamp, the adjacent pipe clamps are connected with battens, each pipe clamp unit is hung below a cross beam through a vertical hanging, the pipe clamp is sleeved on the light pipe between the adjacent fins, the abrasion of the heating surface is small, and the pipe bundle is heated uniformly.

Description

Wear-resisting and suspension structure for heating surface of waste heat boiler

Technical Field

The utility model belongs to the technical field of the exhaust-heat boiler technique and specifically relates to an exhaust-heat boiler receives surface abrasionproof and suspension structure.

Background

With the development of cement clinker calcining technology, the energy-saving technology of the cement industry has a great progress, the flue gas waste heat is utilized in the cement production process, and the heat of the medium-low temperature waste gas below 400 ℃ discharged by a kiln head clinker cooler and a kiln tail preheater accounts for more than 35% of the total heat consumption of a cement clinker firing system. The waste heat boiler is characterized in that water is continuously heated by energy released by waste heat smoke in a heating surface, the temperature is increased, pressure steam is generated, the boiling point of the water is increased along with the increase of the pressure, the boiler is sealed, the expansion of the steam in the boiler is limited, the pressure is generated, and thermodynamic power is formed (strictly speaking, the steam of the boiler is formed by heating the water in a boiler barrel to saturated water at a constant pressure and then vaporizing the water) and is widely used as an energy source.

But because the flue gas after the kiln head calcines the cement clinker contains higher ash content (the content is about 30 g/Nm)³) The wear of the heating surface of a kiln head waste heat boiler (AQC) is large, the service life of equipment is greatly reduced, the production is influenced, the benefit of enterprises is reduced, and the conditions that flue gas from a flue erodes the heating surface to cause flue gas bias flow easily, so that the heating is uneven and the boiler output is insufficient occur. In addition, the supporting structure supporting the tube bundle is easy to deform after being heated for a long time, so that the tube bundle is inclined and disordered, and the heating of the tube bundle is influenced.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defects in the prior art and provides an abrasion-proof and suspension structure for a heating surface of a waste heat boiler, so that the abrasion of the heating surface is small, and a pipe bundle is uniformly heated.

The utility model discloses the technical scheme who adopts as follows: an anti-abrasion and suspension structure for a heating surface of a waste heat boiler comprises a tube box frame, wherein an inlet header, a convection fin tube bundle, an outlet header and an anti-abrasion fin tube bundle are arranged in the tube box frame, the inlet header and the outlet header are respectively connected with an inlet header pipe joint and an outlet header pipe joint, two inlet header pipe joints and two outlet header pipe joints are respectively arranged on the tube box frame through flexible expansion joints, the inlet header and the outlet header are communicated through the convection fin tube bundle, on the cross section of the convection fin tube bundle, the convection fin tube bundle is arranged in a multi-row and multi-column manner, the sequential connecting lines of all the convection fin tube bundles in two adjacent rows are wavy line type, the anti-abrasion fin tube bundle is arranged in two rows and multi-column manner, the uppermost end of each row of the convection fin tube bundle corresponds to one anti-abrasion fin tube bundle, the sequential connecting lines of all the anti-abrasion fin tube bundles in two rows are wavy line type, and a plurality of tube clamp units are sleeved on the convection fin tube bundle and the anti-abrasion fin tube bundle in each row, the pipe clamp units comprise pipe clamps and battens, each convection finned tube bundle and each abrasion-proof finned tube bundle in each row are all sleeved with the pipe clamps, the adjacent pipe clamps are connected through the battens, the upper end of the pipe box frame is provided with a cross beam, each pipe clamp unit is vertically hung below the cross beam through the battens, the lower end of each pipe clamp unit is vertically connected with a strip-shaped flat steel, the flat steel is parallel to the cross beam, the two ends of the flat steel are fixed on the pipe box frame, the fins on the convection finned tube bundles and the abrasion-proof finned tube bundles are all arranged in a segmented mode, and the pipe clamps are sleeved on light pipes between the adjacent fins.

As a further improvement of the above technical solution:

the upper end of the tube box frame is hung with two first smoke baffles which are arranged in parallel at intervals, the lower ends of the two first smoke baffles extend to the upper parts of two sides of the anti-abrasion fin tube bundle respectively, the lower end of the tube box frame vertically fixes two second smoke baffles which are arranged in parallel at intervals, the two second smoke baffles extend to the lower parts of two sides of the convection fin tube bundle respectively, a smoke channel is formed between the two first smoke baffles and the two second smoke baffles, and an elbow of the convection fin tube bundle is arranged outside the smoke channel.

An access door is arranged on the pipe box frame.

The pipe clamp is in clearance fit with the corresponding light pipe.

The utility model has the advantages as follows: the anti-abrasion finned tube bundle is arranged on the windward side, smoke firstly erodes the anti-abrasion finned tube bundle when entering the smoke channel, and the ash content of the smoke is reduced after passing through the anti-abrasion finned tube bundle, so that the abrasion of the smoke to the convection finned tube bundle is reduced. On the cross section of the convection finned tube bundle, the convection finned tube bundles are arranged in a multi-row and multi-column manner, the sequential connecting lines of all the adjacent two rows of convection finned tube bundles are in a wave line type, the anti-abrasion finned tube bundles are arranged in two rows and multi-column manner, the uppermost end of each row of the convection finned tube bundles corresponds to one anti-abrasion finned tube bundle, the sequential connecting lines of all the anti-abrasion finned tube bundles in two rows are in a wave line type, namely the convection finned tube bundles are arranged in a staggered manner, and the anti-abrasion finned tube bundles are arranged in a staggered manner so as to prevent each row of the convection finned tube bundles from being abraded. Every pipe clamp unit adopts the vertical below of hanging at the crossbeam of the mode of hanging, can be heated the deformation after long-time the use because of the pipe clamp unit, and the mode of hanging, the effect of pipe clamp unit and continuous tube bank gravity can form the decurrent deformation of being heated that drags and reduce pipe clamp unit self to the pipe clamp unit for the position of abrasionproof finned tube bank and convection current finned tube bank can not change, further assurance abrasionproof finned tube bank's abrasionproof decreases the effect, guarantee that convection current finned tube bank is heated evenly.

Drawings

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

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

Fig. 3 is an enlarged view of a portion B of fig. 2.

Wherein: 1. a flexible expansion joint; 2. an inlet header; 3. a convective fin tube bundle; 4. an outlet header; 5. a tube box frame; 6. wear-resistant finned tube bundles; 7. a pipe clamp unit; 71. a pipe clamp; 72. laths; 81. a first flue gas baffle; 82. a second flue gas baffle; 9. an access door; 10. a cross beam; 11. flat steel; 12. the inlet and outlet header pipe joints.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1-3, the wear-resistant and suspension structure for the heating surface of the exhaust-heat boiler of the present embodiment includes a tube box frame 5, an inlet header 2, a convection finned tube bundle 3, an outlet header 4 and a wear-resistant finned tube bundle 6 are installed in the tube box frame 5, the inlet header 2 and the outlet header 4 are respectively connected to inlet and outlet header pipe joints 12, the two inlet and outlet header pipe joints 12 are respectively installed on the tube box frame 5 through flexible expansion joints 1, the inlet header 2 and the outlet header 4 are communicated through the convection finned tube bundle 3, on the cross section of the convection finned tube bundle 3, the convection finned tube bundle 3 is arranged in multiple rows and multiple columns, the sequential connecting lines of all the convection finned tube bundles 3 in two adjacent rows are wavy, the wear-resistant finned tube bundles 6 are arranged in two rows and multiple columns, the uppermost end of each row of the convection finned tube bundle 3 corresponds to one wear-resistant finned tube bundle 6, the sequential connecting lines of all the wear-resistant finned tube bundles 6 in two rows are wavy, a plurality of pipe clamp units 7 are sleeved on the convection finned tube bundle 3 and the anti-abrasion finned tube bundle 6 of each row, each pipe clamp unit 7 comprises a pipe clamp 71 and a batten 72, each convection finned tube bundle 3 and the anti-abrasion finned tube bundle 6 of each row are all sleeved with the pipe clamp 71, adjacent pipe clamps 71 are connected through the batten 72, the upper end of the pipe box frame 5 is provided with a cross beam 10, each pipe clamp unit 7 is vertically hung below the cross beam 10 through the batten 72, the lower end of each pipe clamp unit 7 is vertically connected with a strip-shaped flat steel 11, the flat steel 11 is parallel to the cross beam 10, two ends of the flat steel 11 are fixed on the pipe box frame 5, fins on the convection finned tube bundle 3 and the anti-abrasion finned tube bundle 6 are all arranged in a segmented mode, and the pipe clamps 71 are sleeved on light pipes between adjacent fins.

Two first flue gas baffles 81 arranged in parallel at intervals are hung at the upper end of the tube box frame 5, the lower ends of the two first flue gas baffles 81 extend to the upper parts of the two sides of the anti-abrasion finned tube bundle 6 respectively, the lower end of the tube box frame 5 vertically fixes the two second flue gas baffles 82 arranged in parallel at intervals, the two second flue gas baffles 82 extend to the lower parts of the two sides of the convection finned tube bundle 3 respectively, and a flue gas channel is formed between the two first flue gas baffles 81 and the two second flue gas baffles 82, and the elbow of the convection finned tube bundle 3 is arranged outside the flue gas channel.

An access door 9 is arranged on the channel frame 5, so that the channel frame is convenient to overhaul.

The pipe clamps 71 are in clearance fit with the corresponding light pipes, the convection finned tube bundle 3 slightly expands after being heated, and the clearance fit ensures that the pipe clamps 71 cannot limit the expansion of the convection finned tube bundle 3.

When the anti-abrasion finned tube bundle is used, water flows through the inlet-outlet header pipe joint 12, the inlet header 2, the convection finned tube bundle 3, the outlet header 4 and the other inlet-outlet header pipe joint 12 in sequence, water does not flow into the anti-abrasion finned tube bundle 6, smoke flows to a smoke channel from top to bottom in the direction indicated by an arrow in fig. 1, the anti-abrasion finned tube bundle 6 is installed on the windward side, the smoke firstly erodes the anti-abrasion finned tube bundle 6 when entering the smoke channel, and the ash content of the smoke is reduced after passing through the anti-abrasion finned tube bundle 6, so that the abrasion of the convection finned tube bundle 3 is reduced. On the cross section of the convection finned tube bundle 3, the convection finned tube bundle 3 is arranged in a plurality of rows and a plurality of columns, the sequential connecting lines of all the adjacent two rows of convection finned tube bundles 3 are wavy line types, the anti-abrasion finned tube bundles 6 are arranged in two rows and a plurality of columns, the uppermost end of each row of the convection finned tube bundles 3 corresponds to one anti-abrasion finned tube bundle 6, the sequential connecting lines of all the anti-abrasion finned tube bundles 6 in two rows are wavy line types, namely the convection finned tube bundles 3 are arranged in a staggered manner, and the anti-abrasion finned tube bundles 6 are arranged in a staggered manner in order to prevent each row of the convection finned tube bundles 3 from being abraded, so the anti-abrasion finned tube bundles 6 are also arranged in a staggered manner, and the heating surface of the convection finned tube bundles 3 can be heated uniformly in the staggered manner. Every pipe clamp unit 7 adopts the vertical below of hanging at crossbeam 10 of mode of hanging, can be heated the deformation after long-time the use because of pipe clamp unit 7, and the mode of hanging, the effect of pipe clamp unit 7 and continuous tube bank gravity can form a decurrent pulling and reduce the deformation by heat of pipe clamp unit 7 self to pipe clamp unit 7, make the position of abrasionproof finned tube bank 6 and convection finned tube bank 3 can not change, further assurance abrasionproof finned tube bank 6's abrasionproof decreases the effect, guarantee that convection finned tube bank 3 is heated evenly.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.

Claims

1. The utility model provides a wear-resisting and suspended structure of exhaust-heat boiler heating surface which characterized in that: comprises a tube box frame (5), an inlet header (2), a convection finned tube bundle (3), an outlet header (4) and an anti-abrasion finned tube bundle (6) are arranged in the tube box frame (5), the inlet header (2) and the outlet header (4) are respectively connected with inlet and outlet header pipe joints (12), the two inlet and outlet header pipe joints (12) are respectively arranged on the tube box frame (5) through flexible expansion joints (1), the inlet header (2) and the outlet header (4) are communicated through the convection finned tube bundle (3), on the cross section of the convection finned tube bundle (3), the convection finned tube bundle (3) is arranged in a multi-row and multi-column manner, the sequential connecting lines of all the convection finned tube bundles (3) in two adjacent rows are in a wavy line type, the anti-abrasion finned tube bundle (6) is arranged in two rows and multi-column manner, and the uppermost end of each row of convection fins (3) corresponds to one anti-abrasion finned tube bundle (6), the connecting line in proper order of all abrasionproof finned tube bundles (6) of two rows is the wavy line type, a plurality of pipe clamp units (7) are established to every convection current finned tube bundle (3) and abrasionproof finned tube bundle (6) of a row go up the cover, pipe clamp unit (7) are including pipe clamp (71) and slat (72), all overlap on every convection current finned tube bundle (3) and the abrasionproof finned tube bundle (6) of every row and establish pipe clamp (71) and connect through slat (72) between adjacent pipe clamp (71), the upper end of tube case frame (5) sets up crossbeam (10), every pipe clamp unit (7) are through slat (72) vertical below of hanging at crossbeam (10), bar band steel (11) is connected perpendicularly to the lower extreme of every pipe clamp unit (7), band steel (11) and crossbeam (10) are parallel, the both ends of band steel (11) are fixed on tube case frame (5), fin on convection current finned tube bundle (3) and abrasionproof finned tube bundle (6) all sets up the segmentation and pipe clamp (71) between adjacent fin overlaps and establish the last light pipe clamp (71) is established .

2. The wear prevention and suspension structure for the heating surface of the waste heat boiler as claimed in claim 1, wherein: the upper end of pipe case frame (5) hangs two first flue gas baffle (81) that parallel interval arranged, the lower extreme of two first flue gas baffle (81) extends to the both sides top of abrasionproof finned tube bank (6) respectively, the lower extreme of pipe case frame (5) is vertical fixed two second flue gas baffle (82) that parallel interval arranged, two second flue gas baffle (82) extend to the both sides below of convection current finned tube bank (3) respectively, form flue gas passageway and the elbow of convection current finned tube bank (3) and arrange in flue gas passageway's outside between two first flue gas baffle (81) and two second flue gas baffle (82).

3. The wear prevention and suspension structure for the heating surface of the exhaust-heat boiler of claim 2, characterized in that: an access door (9) is arranged on the channel frame (5).

4. The wear prevention and suspension structure for the heating surface of the waste heat boiler as claimed in claim 1, wherein: the pipe clamp (71) is in clearance fit with the corresponding light pipe.