CN223755373U

CN223755373U - Economizer structure of a waste incineration waste heat boiler

Info

Publication number: CN223755373U
Application number: CN202520186443.8U
Authority: CN
Inventors: 张晓忠; 俞见阳; 寿瑜玲; 戴行飞; 李书平
Original assignee: HANGZHOU NEW CENTURY ENERGY ENVIRONMENTAL PROTECTION ENGINEERING CO LTD
Current assignee: HANGZHOU NEW CENTURY ENERGY ENVIRONMENTAL PROTECTION ENGINEERING CO LTD
Priority date: 2025-02-06
Filing date: 2025-02-06
Publication date: 2026-01-02
Anticipated expiration: 2035-02-06

Abstract

This utility model relates to the field of economizer technology and discloses an economizer structure for a waste incineration waste heat boiler, comprising: a tube box, in which a heat exchange tube system is arranged, the heat exchange tube system including a plurality of heat exchange tubes two and a plurality of heat exchange tubes one; a feedwater inlet pipe, on which a plurality of connecting pipes are connected; a distribution manifold, the connecting pipes being connected to the end section of the distribution manifold; a collection manifold, the two ends of the heat exchange tubes one being connected to the ends of the collection manifold and the distribution manifold respectively, and the two ends of the heat exchange tubes two being connected to the middle section of the collection manifold and the distribution manifold respectively; and a plurality of outlet pipes connected to the middle section of the distribution manifold. The economizer structure proposed in this utility model, under the same heating surface conditions, can increase the flow velocity of the medium in the tube system, improve the heat exchange efficiency, effectively utilize the heat in the flue gas of the waste heat boiler, and improve the economic benefits of the device.

Description

Economizer structure of waste incineration exhaust-heat boiler

Technical Field

The utility model relates to the technical field of economizers, in particular to an economizer structure of a waste incineration exhaust-heat boiler.

Background

The economizer is an important component part in a boiler system and is mainly used for recovering waste heat in flue gas so as to preheat boiler feed water, and in this way, the economizer not only improves the heat efficiency of the whole system, but also reduces fuel consumption and running cost, and brings remarkable economic benefit and environmental benefit.

The steam-water trend of the conventional garbage furnace economizer is from back to front, and the water supply is from an inlet header to a serpentine pipe system to an outlet header to a next-stage economizer pipe system (single-stage or multi-stage pipe system still according to the trend of the previous stage) and finally to a boiler barrel;

The domestic garbage furnace has been developed for several years, in order to reduce the cost and increase the efficiency, the design form of the boiler starts to solidify, various component structures and forms are simple and effective, the coal economizer structure of the conventional horizontal garbage incineration waste heat boiler is in a serpentine pipe form, one end of the whole serpentine pipe system is filled with water, the other end of the serpentine pipe system is discharged, the structure is simple in design, the production cost is low, the assembly is convenient, the later maintenance is easy, and the like, but the water flow speed in the pipe is slower, the heat exchange efficiency is lower, the lower water flow speed leads to insufficient heat transfer, more heat is discharged along with the flue gas, the flue gas temperature is increased, the underutilized heat energy is discharged into the environment, the underutilized heat energy is not effectively converted into usable steam or hot water, the energy utilization rate of the whole system is influenced, and the energy utilization rate of the whole system is opposite to the energy conservation and consumption reduction.

Therefore, it is necessary to design an economizer structure of a waste incineration exhaust-heat boiler to solve the above-mentioned problems.

Disclosure of utility model

The utility model aims to solve the defects in the prior art and provides an economizer structure of a waste incineration waste heat boiler.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The economizer structure of the waste incineration waste heat boiler comprises a pipe box, a distribution header and a collection header, wherein a heat exchange pipe system is arranged in the pipe box and comprises a plurality of heat exchange pipes II and a plurality of heat exchange pipes I, a water supply inlet pipe is communicated with the water supply inlet pipe and is provided with a plurality of connecting pipes, the connecting pipes are communicated with end sections of the distribution header, two ends of the heat exchange pipes I are respectively communicated with the collection header and the end sections of the distribution header, two ends of the heat exchange pipes II are respectively communicated with the collection header and the middle section of the distribution header, and a plurality of eduction pipes are communicated with the middle section of the distribution header.

As a preferable technical scheme of the utility model, the collecting box and the connecting pipe are communicated with each other and provided with a plurality of exhaust pipes.

As a preferable technical scheme of the utility model, a vent pipe is arranged above the pipe box, all the vent pipes are communicated with the vent pipe, and a stop valve is arranged on the vent pipe.

As a preferable embodiment of the present utility model, the vent pipe is located above all the exhaust pipes.

As a preferable technical scheme of the utility model, the exhaust pipe is vertically arranged, the connection part of the exhaust pipe and the connecting pipe is positioned at the highest point of the connecting pipe, and the connection part of the exhaust pipe and the collecting box is positioned at the highest point of the collecting box.

As a preferable technical scheme of the utility model, the vent pipe and the exhaust pipe are both made of carbon steel materials.

The utility model has the following beneficial effects:

1. The water flow path can be optimized, the first heat exchange pipe and the second heat exchange pipe are respectively communicated with different parts of the distribution header, so that the device can improve the medium flow rate in a pipe system under the condition of the same heating surface, the heat exchange capacity of the economizer is further effectively improved, air in a pipeline can be thoroughly discharged through an exhaust system, the influence of the air on heat exchange is reduced, air resistance caused by the air is eliminated, and the contact between water and flue gas is more direct, thereby remarkably improving the heat exchange efficiency;

2. The waste of energy is prevented, waste heat in flue gas can be better utilized, the temperature of exhausted flue gas is reduced, the energy loss which is not utilized is reduced, the higher energy utilization rate is realized, the corrosion risk in a pipeline and a furnace is reduced due to the rapid and effective heat transfer, the service life of equipment is prolonged, and the cost of long-term maintenance and replacement is indirectly saved;

3. The system is easier to meet the increasingly strict environmental protection regulation requirements due to higher energy utilization rate and lower emission level, and the social responsibility feeling and market competitiveness of enterprises are enhanced;

4. The application can be improved on the basis of the existing economizer structure, is compatible with the existing structure, does not need to dismantle or rebuild the existing equipment on a large scale, greatly reduces the reconstruction cost by reserving most of the original components and performing local optimization, has compact design and easy installation, reduces the time and complexity of site construction, and reduces the labor cost.

Drawings

Fig. 1 is a schematic diagram of the structure of an economizer of a waste incineration exhaust-heat boiler;

FIG. 2 is a cross-sectional view taken along the direction A-A of FIG. 1;

fig. 3 is a schematic structural view of the stop valve and the vent pipe.

In the figure, a pipe box 1, a heat exchange pipe I, a heat exchange pipe II, a water supply inlet pipe 4, a connecting pipe 5, a water inlet header 6, a water outlet header 7, a collecting header 8, an exhaust pipe 9, an eduction pipe 10, a suspension beam 11, a ventilation pipe 12 and a stop valve 13 are arranged.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1 and 2, an economizer structure of a waste incineration exhaust-heat boiler includes:

the heat exchange tube system comprises a plurality of heat exchange tubes II 3 and a plurality of heat exchange tubes I2, wherein the heat exchange tubes I2 and II 3 are of a serpentine structure, furthermore, a hanging beam 11 is arranged above the tube box 1, the heat exchange tube system is hung on the hanging beam 11 through a steel cable, and the hanging beam 11 is hung and fixed on a girder through the steel cable, so that shielding of a fixing device on the tube system can be reduced, and heat exchange efficiency is guaranteed;

The water supply introducing pipe 4 is communicated with a plurality of connecting pipes 5, and the water supply introducing pipe 4 is used for introducing a water source to be subjected to heat exchange;

A distribution header, the connecting pipe 5 being in communication with an end section of the distribution header;

The two ends of the heat exchange tube I2 are respectively communicated with the ends of the collecting header 8 and the distribution header, and the two ends of the heat exchange tube II 3 are respectively communicated with the middle parts of the collecting header 8 and the distribution header;

The structure of the application can be designed into a plurality of stages in practical application, and water discharged by the eduction pipes 10 can enter the water supply inlet pipe 4 of the next stage for heat exchange;

Specifically, the distribution header comprises three sections, every adjacent section is not communicated, the two end sections are water inlet header 6, the part is communicated with water supply inlet pipe 4 through connecting pipe 5, so that water source can enter into heat exchange pipe one 2, the middle section is water outlet header 7, so that water source after heat exchange can enter into eduction pipe 10 through the section, and the whole structure is symmetrically arranged from overlooking angle, so that water source can exchange heat and discharge in order along the field.

The water source is introduced into the water supply inlet pipe 4 during heat exchange, the water source can enter the water inlet header 6 through the connecting pipe 5 and then enters the plurality of first heat exchange pipes 2 for heat exchange, the water source after preliminary heat exchange can be completely gathered in the gathering header 8 and then introduced into the second heat exchange pipe 3 for final heat exchange, and the water source after heat exchange is introduced into the water outlet header 7 of the distribution header and finally introduced into required equipment through the eduction pipe 10.

Further, referring to fig. 3, the collecting box 8 and the connecting pipe 5 are all communicated with each other to be provided with a plurality of exhaust pipes 9, when water is introduced, air in the pipeline is discharged, overpressure accidents can be prevented, the upper part of the pipe box 1 is provided with a vent pipe 12, all the exhaust pipes 9 are all communicated with the vent pipe 12, the vent pipe 12 is provided with a stop valve 13, the vent pipe 12 is positioned above all the exhaust pipes 9, the exhaust pipes 9 are vertically arranged, the connection part of the exhaust pipes 9 and the connecting pipe 5 is positioned at the highest point of the connecting pipe 5, the connection part of the exhaust pipes 9 and the collecting box 8 is positioned at the highest point of the collecting box 8, the design is favorable for ascending and discharging air, the exhaust time is obviously shortened, the exhaust thoroughness is improved, further, air resistance caused by air is reduced, the heat exchange efficiency is improved, both the vent pipes 12 and the exhaust pipes 9 are made of carbon steel materials, and the stability of the structure is ensured.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. An economizer structure for a waste incineration waste heat boiler, characterized in that it comprises:

The tube box (1) is equipped with a heat exchange tube system, which includes a number of heat exchange tubes two (3) and a number of heat exchange tubes one (2);

A water inlet pipe (4) is provided with several connecting pipes (5);

The distribution manifold is connected to the end section of the distribution manifold.

The heat exchange tube 1 (2) is connected to the ends of the heat exchange tube 1 (8) and the distribution tube 2 (3) respectively. The heat exchange tube 2 (3) is connected to the middle of the heat exchange tube 1 (8) and the distribution tube 2 (3) respectively.

Several outlet pipes (10) are connected to the middle section of the distribution box.

2. The economizer structure of a waste incineration waste heat boiler according to claim 1, characterized in that a plurality of exhaust pipes (9) are connected to both the collection box (8) and the connecting pipe (5).

3. The economizer structure of a waste incineration waste heat boiler according to claim 2, characterized in that a vent pipe (12) is provided above the pipe box (1), all of the exhaust pipes (9) are connected to the vent pipe (12), and a shut-off valve (13) is provided on the vent pipe (12).

4. The economizer structure of a waste incineration waste heat boiler according to claim 3, characterized in that the vent pipe (12) is located above all the exhaust pipes (9).

5. The economizer structure of a waste incineration waste heat boiler according to claim 4, characterized in that the exhaust pipe (9) is placed vertically, the connection between the exhaust pipe (9) and the connecting pipe (5) is located at the highest point of the connecting pipe (5), and the connection between the exhaust pipe (9) and the collecting box (8) is located at the highest point of the collecting box (8).

6. The economizer structure of a waste incineration waste heat boiler according to claim 5, characterized in that the vent pipe (12) and the exhaust pipe (9) are both made of carbon steel.