CN212869735U

CN212869735U - Vertical screwed smoke tube economizer

Info

Publication number: CN212869735U
Application number: CN202021540875.8U
Authority: CN
Inventors: 冯小东; 李鑫
Original assignee: Harbin Hongqi Boiler Co ltd
Current assignee: Harbin Hongqi Boiler Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-04-02
Anticipated expiration: 2030-07-30

Abstract

A vertical threaded smoke tube economizer belongs to the technical field of boiler economizers and aims to solve the problems that the tube wall of the existing economizer can generate a large amount of accumulated dust, the heat exchange capability between smoke and water through a metal tube wall and the circulation capability of the smoke are blocked, the smoke exhaust temperature of a boiler is increased, the heat efficiency is reduced, the smoke resistance of the boiler is increased, the power consumption of an induced draft fan is increased, and the service life and the operation safety and stability of the economizer are influenced. The utility model discloses a jar body and many screw thread tobacco pipes, jar internal vertical many screw thread tobacco pipes that are equipped with, the upper end of many screw thread tobacco pipes is for advancing the mouth, and the lower extreme of many screw thread tobacco pipes is the exhaust port, is equipped with water inlet and delivery port on the jar body, and the water inlet is located the lower extreme of the jar body, and the delivery port is located the upper end of the jar body. The utility model is suitable for a boiler.

Description

Vertical screwed smoke tube economizer

Technical Field

The utility model relates to an economizer belongs to boiler heat exchanger technical field.

Background

The economizer of the existing heat supply boiler in the current market has a serpentine tube structure and a cast iron structure, and because the flue gas temperature at the tail part of the boiler is low and the water temperature in the boiler is low, the economizer of the traditional structure often generates the phenomena of tube wall dust deposition and acid corrosion, and a large amount of dust deposition on the tube wall blocks the heat exchange capacity between the flue gas and the water through the metal tube wall and the circulation capacity of the flue gas, so that a series of problems of boiler smoke exhaust temperature rise, heat efficiency reduction, boiler flue gas resistance increase, draught fan power consumption increase and the like are caused. The pipe wall generates flue gas acid condensation due to low temperature, and acidic corrosion is formed on the metal pipe wall, so that the service life and the operation safety and stability of the economizer are seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve current economizer pipe wall and can produce a large amount of deposition, obstructed the ability through the metal pipe wall heat transfer between flue gas and the water and the circulation ability of flue gas, caused boiler exhaust gas temperature to rise, the thermal efficiency reduces, boiler flue gas resistance increases and draught fan power consumption increases to influence the life of economizer and the problem of operation safety and stability, and provide a vertical screw thread tobacco pipe economizer.

The utility model discloses a solve the technical scheme that above-mentioned technical problem took and be:

the first scheme is as follows: the utility model provides a vertical screw thread tobacco pipe economizer, includes a jar body and many screw thread tobacco pipes, and jar internal vertical many screw thread tobacco pipes that are equipped with of body, every screw thread tobacco pipe are the straight tube, and the upper end of many screw thread tobacco pipes is into the mouth, and the lower extreme of many screw thread tobacco pipes is the exhaust port, is equipped with water inlet and delivery port on the jar body, and the water inlet is located the lower extreme of jar body, and the delivery port is located the upper end of jar body.

Preferably, the tank body comprises a cylinder body, an upper tube plate and a lower tube plate, the upper tube plate and the lower tube plate are respectively welded at two ends of the cylinder body, a plurality of through holes are respectively processed on the upper tube plate and the lower tube plate, and two ends of each threaded smoke tube are fixed in the through holes of the upper tube plate and the through holes of the lower tube plate.

Preferably, the water outlet is located on the upper tube sheet.

Preferably, the water inlet is located on the side of the lower end of the barrel.

Preferably, the bottom of the tank body is provided with a sewage discharge pipe.

Preferably, the surface of each threaded smoke tube is provided with threads which are convex inwards and concave outwards.

Preferably, the materials of the plurality of screwed smoke pipes are all 20GB3087 steel.

Preferably, two adjacent tanks are communicated through a pressure balance pipe.

Scheme II: the novel spiral smoke tube comprises a plurality of tank bodies and a plurality of groups of spiral smoke tubes, wherein a group of spiral smoke tubes are vertically arranged in each tank body, the upper end of each spiral smoke tube in each group of spiral smoke tubes is a smoke inlet, the lower end of each spiral smoke tube in each group of spiral smoke tubes is a smoke outlet, each tank body is provided with a water inlet and a water outlet, the water inlet is positioned at the lower end of the tank body, the water outlet is positioned at the upper end of the tank body, and two adjacent tank bodies are arranged in parallel through a pipeline.

Compared with the prior art, the utility model following beneficial effect has:

one, the utility model discloses with the vertical setting of screw thread tobacco pipe, utilize the pipe wall screw thread to form the high-speed rotatory air current of downward flow, combine grey gravity to accomplish pneumatic conveying inside the tobacco pipe, solved the easy deposition problem of traditional economizer. Water is introduced from the bottom of the cylinder, the water flow direction is opposite to the flow direction of the flue gas, the heat exchange time of the flue gas and the threaded smoke pipe is prolonged to improve the temperature of the pipe wall, and the problem of low-temperature acid corrosion of the traditional economizer is solved. Meanwhile, the safety, the service life and the maintainability of the economizer are improved. The production cost is saved for enterprises, the coal consumption, the power consumption operation cost and the later maintenance cost are saved for users, and the national energy-saving requirement on high-energy-consumption special equipment is met.

Secondly, the utility model discloses the screw thread tobacco pipe adopts the straight tube design, reduces the design of economizer flue gas passageway variable cross section number of times and reduction deposition, has reduced boiler flue gas resistance, saves the draught fan power consumption.

Drawings

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

FIG. 2 is a schematic A-A diagram of FIG. 1;

fig. 3 is a partial enlarged view at I of fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.

Example 1: as shown in fig. 1 and fig. 3, the vertical screwed smoke tube economizer of the present embodiment includes a tank body 1 and a plurality of screwed smoke tubes 2, the material of the screwed smoke tubes 2 is 20GB3087 steel, the tank body 1 is vertically provided with the plurality of screwed smoke tubes 2, each screwed smoke tube 2 is a straight tube, the upper ends of the plurality of screwed smoke tubes 2 are smoke inlets, the lower ends of the plurality of screwed smoke tubes 2 are smoke outlets, the tank body 1 is provided with a water inlet 1-1 and a water outlet 1-2, the water inlet 1-1 is located at the lower end of the tank body 1, and the water outlet 1-2 is located at the upper end of the tank body 1.

In this embodiment, the flue gas enters from the threaded smoke tube at the top of the tank body 1, is discharged from the bottom, the water enters from the bottom of the tank body, is discharged from the top, the flue gas exchanges heat through the threaded smoke tube 2, and the threaded structure of the threaded smoke tube 2 converts the vertical downward flowing direction of the flue gas into a rotating airflow to bring out ash. Meanwhile, compared with a common straight pipe, the threaded smoke pipe is provided with a heat exchange surface, and the heat exchange efficiency is improved.

Specifically, the tank body 1 comprises a cylinder body 1-3, an upper tube plate 1-4 and a lower tube plate 1-5, the upper tube plate 1-4 and the lower tube plate 1-5 are respectively welded at two ends of the cylinder body 1-3, a plurality of through holes are respectively processed on the upper tube plate 1-4 and the lower tube plate 1-5, and two ends of each threaded smoke tube 2 are fixed in the through holes of the upper tube plate 1-4 and the through holes of the lower tube plate 1-5.

Preferably, the water outlet 1-1 is located on the upper tube plate 1-4, and the temperature of the surface of the upper tube plate 1-4 can be reduced, so that the problem that the upper tube plate 1-4 cracks due to local overhigh temperature is prevented.

Optionally, the water inlet 1-1 is located on the side of the lower end of the cylinder 1-3. The water inlet 1-1 may also be provided on the lower tube sheet 1-5.

The bottom of the tank body 1 is provided with a sewage discharge pipe 3 which plays a role in discharging sewage and removing impurities regularly according to the water quality condition.

The surface of each threaded smoke tube 2 is provided with threads which are convex inwards and concave outwards, so that rotary airflow can be generated conveniently, and smoke dust can be prevented from being attached to the tube wall.

Example 2: as shown in figures 1-3, a vertical screwed smoke tube economizer comprises a plurality of tank bodies 1 and a plurality of groups of screwed smoke tubes 2, wherein a group of screwed smoke tubes 2 are vertically arranged in each tank body 1, each screwed smoke tube 2 in the group of screwed smoke tubes 2 is a straight tube, a plurality of screwed smoke tubes 4 are made of high-quality seamless steel tubes and made of 20GB3087 steel, the upper end of each screwed smoke tube 2 in each group of screwed smoke tubes 2 is a smoke inlet, the lower end of each screwed smoke tube 2 in each group of screwed smoke tubes 2 is a smoke outlet, each tank body 1 is provided with a water inlet 1-1 and a water outlet 1-2, the water inlet 1-1 is arranged at the lower end of the tank body 1, the water outlet 1-2 is arranged at the upper end of the tank body 1, two adjacent tank bodies 1 are arranged in parallel through a pipeline, namely, a water inlet main pipe branches are branched into a plurality of water inlet branch pipes, each water inlet branch pipe is communicated with the water inlet 1-1 on each, a water outlet 1-1 on each tank body 1 is communicated with a branch drainage pipe, and each branch drainage pipe is communicated with a main drainage pipe.

The bottom of the shell 1-3 is provided with a drain pipe 3, the drain pipe 3 is provided with a valve, after heat exchange is carried out, the temperature rises, impurities in water can settle, and the drain pipe 3 plays a role in regularly draining and removing the impurities in the water.

Preferably, two adjacent tank bodies 1 are communicated with each other through a pressure balance pipe 4, so that the pressure among the plurality of tank bodies 1 is ensured to be the same, and the uneven heat exchange caused by the unbalanced water flow is prevented.

In the embodiment 1 and the embodiment 2, the flow velocity of the introduced flue gas is 19m/s, and the pneumatic conveying is completed on the inner wall of the threaded smoke pipe 2 by combining the high-speed flow of the flue gas with the gravity of ash, so that the ash deposition on the pipe wall is reduced, the high-efficiency heat transfer of the threaded smoke pipe 2 is realized, and the stability of the exhaust temperature and the heat efficiency is ensured; the water is firstly sent into the hearth to fully absorb heat, and then sent into the tank body 1 of the utility model when the water temperature is higher than the acid dew point temperature in the flue gas, so that the higher pipe wall temperature is obtained, and the flue gas does not have the acid dewing phenomenon because the pipe wall temperature is higher than the dew point temperature, thereby solving the problem that the flue gas acid corrodes the economizer; the utility model discloses set threaded smoke pipe 2 to the straight tube, through reducing the design of economizer flue gas passageway variable cross section number of times and reduction deposition, reduced boiler flue gas resistance, save the draught fan power consumption.

Although the present invention has been described in detail with reference to certain specific embodiments, it will be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. The utility model provides a vertical screwed tobacco pipe economizer which characterized in that: the novel threaded smoke pipe comprises a tank body (1) and a plurality of threaded smoke pipes (2), wherein the plurality of threaded smoke pipes (2) are vertically arranged in the tank body (1), each threaded smoke pipe (2) is a straight pipe, the upper ends of the plurality of threaded smoke pipes (2) are smoke inlets, the lower ends of the plurality of threaded smoke pipes (2) are smoke outlets, a water inlet (1-1) and a water outlet (1-2) are formed in the tank body (1), the water inlet (1-1) is located at the lower end of the tank body (1), and the water outlet (1-2) is located at the upper end of the tank body (1).

2. The vertical screwed smoke tube economizer of claim 1, wherein: the tank body (1) comprises a cylinder body (1-3), an upper tube plate (1-4) and a lower tube plate (1-5), the upper tube plate (1-4) and the lower tube plate (1-5) are respectively welded at two ends of the cylinder body (1-3), a plurality of through holes are respectively processed on the upper tube plate (1-4) and the lower tube plate (1-5), and two ends of each threaded smoke tube (2) are fixed in the through holes of the upper tube plate (1-4) and the through holes of the lower tube plate (1-5).

3. The vertical screwed smoke tube economizer of claim 2, wherein: the water outlet (1-2) is positioned on the upper tube plate (1-4).

4. The vertical screwed smoke tube economizer of claim 2, wherein: the water inlet (1-1) is positioned on the side surface of the lower end of the cylinder body (1-3).

5. The vertical screwed smoke tube economizer of claim 1, wherein: the bottom of the tank body (1) is provided with a sewage discharge pipe (3).

6. The vertical screwed smoke tube economizer of claim 1, wherein: the surface of each threaded smoke tube (2) is provided with threads which are convex inwards and concave outwards.

7. The vertical screwed smoke tube economizer of claim 1, wherein: the materials of the plurality of screwed smoke pipes (2) are all 20GB3087 steel.

8. The utility model provides a vertical screwed tobacco pipe economizer which characterized in that: the novel threaded smoke pipe comprises a plurality of tank bodies (1) and a plurality of groups of threaded smoke pipes (2), wherein a group of threaded smoke pipes (2) are vertically arranged in each tank body (1), each threaded smoke pipe (2) in each group of threaded smoke pipes (2) is a straight pipe, the upper end of each threaded smoke pipe (2) in each group of threaded smoke pipes (2) is a smoke inlet, the lower end of each threaded smoke pipe (2) in each group of threaded smoke pipes (2) is a smoke outlet, each tank body (1) is provided with a water inlet (1-1) and a water outlet (1-2), the water inlet (1-1) is located at the lower end of the tank body (1), the water outlet (1-2) is located at the upper end of the tank body (1), and two adjacent tank bodies (1) are arranged in parallel through a pipeline.

9. The vertical screwed smoke tube economizer of claim 8 wherein: a sewage discharge pipe (3) is arranged at the bottom of each tank body (1).

10. The vertical screwed smoke tube economizer of claim 8 wherein: two adjacent tank bodies (1) are communicated (4) through a pressure balance pipe.