Economizer structure of waste incineration waste heat boiler

Abstract

The utility model relates to the technical field of economizers, and discloses an economizer structure of a waste incineration waste heat boiler, which comprises a tube box, a heat exchange tube system is arranged in the tube box, and the heat exchange tube system comprises a plurality of second heat exchange tubes and a plurality of first heat exchange tubes; a plurality of connecting pipes are arranged on the water supply leading-in pipe in a communicating manner; the connecting pipe is communicated with the end part section of the distribution header; the two ends of the first heat exchange pipe are communicated with the end of the collection box and the end of the distribution box respectively, and the two ends of the second heat exchange pipe are communicated with the middle of the collection box and the middle of the distribution box respectively. And the outlet pipes are communicated with the middle section of the distribution header. According to the economizer structure provided by the utility model, under the condition of the same heating surface, the flow velocity of a medium in a pipe system can be increased, the heat exchange efficiency is improved, the heat in flue gas in an incineration waste heat boiler is effectively utilized, and the economic benefit of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coal economizer structure of waste incineration waste heat boiler. BACKGROUND

[0002] The coal economizer is an important component in the boiler system, mainly used for recycling the waste heat in the flue gas to preheat the boiler feed water. In this way, the coal economizer not only improves the thermal efficiency of the entire system, but also reduces fuel consumption and operating costs, bringing significant economic and environmental benefits.

[0003] The steam and water of the conventional coal economizer of the garbage furnace all go from back to front. The feed water goes from the inlet header to the serpentine pipe system to the outlet header to the next stage of the coal economizer pipe system (still following the single or multi-stage pipe system of the previous stage), and finally to the drum.

[0004] After several years of development, the domestic garbage furnace has started to solidify in design form in order to reduce costs and increase efficiency. The structure and form of various components are simple and effective. The coal economizer structure of the conventional horizontal waste incineration waste heat boiler is in the form of a serpentine pipe. The serpentine pipe system has one end for water intake and the other end for water outlet. This structure design is simple, has low production cost, is easy to assemble, and is easy to maintain in the later period. However, the water flow speed in the pipe is slow, resulting in low heat exchange efficiency. The low water flow speed leads to insufficient heat transfer, and thus more heat is discharged with the flue gas, increasing the flue gas temperature. This means that the heat energy that has not been fully utilized is discharged into the environment, and is not effectively converted into usable steam or hot water, thereby affecting the energy utilization rate of the entire system, which is contrary to the goal of energy saving and consumption reduction.

[0005] Therefore, a coal economizer structure of a waste incineration waste heat boiler needs to be designed to solve the above problems. SUMMARY

[0006] The utility model aims at solving the shortcomings in the prior art and provides a coal economizer structure of a waste incineration waste heat boiler.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] A coal economizer structure of a waste incineration waste heat boiler, comprising: a pipe box, a heat exchange pipe system is arranged in the pipe box, the heat exchange pipe system comprises a plurality of heat exchange pipes two and a plurality of heat exchange pipes one; a feed water introduction pipe, a plurality of connecting pipes are connected to the feed water introduction pipe; a distribution header, the connecting pipes are connected to the end section of the distribution header; a collection header, the two ends of the heat exchange pipes one are connected to the end of the collection header and the distribution header, and the two ends of the heat exchange pipes two are connected to the middle of the collection header and the distribution header; a plurality of outlet pipes, which are connected to the middle section of the distribution header.

[0009] As a preferred technical scheme of the utility model, a plurality of exhaust pipes are in communication with the collecting header and the connecting pipe.

[0010] As a preferred technical scheme of the utility model, an air pipe is arranged above the pipe box, all the exhaust pipes are in communication with the air pipe, and a stop valve is arranged on the air pipe.

[0011] As a preferred technical scheme of the utility model, the air pipe is located above all the exhaust pipes.

[0012] As a preferred technical scheme of the utility model, the exhaust pipes are vertically arranged, the connecting position of the exhaust pipes and the connecting pipe is located at the highest point of the connecting pipe, and the connecting position of the exhaust pipes and the collecting header is located at the highest point of the collecting header.

[0013] As a preferred technical scheme of the utility model, the air pipe and the exhaust pipes are made of carbon steel.

[0014] The utility model has the following beneficial effects:

[0015] 1. improve heat exchange efficiency: the water flow path can be optimized, the heat exchange pipe one and the heat exchange pipe two are connected with different parts of the distribution header in communication, so that the device can improve the medium flow rate in the pipe system under the condition of equivalent heating surface, thereby effectively improving the heat exchange capacity of the economizer, secondly, the air in the pipeline can be completely removed through the exhaust system, the influence of air on heat exchange is reduced, the air resistance caused by air is eliminated, the contact between water and flue gas is more direct, thereby the heat exchange efficiency is significantly improved;

[0016] 2. prevent energy waste: by improving the heat exchange efficiency, the waste heat in the flue gas can be better utilized, the exhaust gas temperature is reduced, the energy loss that is not utilized is reduced, higher energy utilization rate is realized, and the rapid and effective heat transfer also reduces the corrosion risk of the pipeline and the furnace, prolongs the service life of the equipment, and indirectly saves the long-term maintenance and replacement cost;

[0017] 3. environmental protection benefit: higher energy utilization rate and lower emission level make the system more easily meet the increasingly strict environmental protection regulations, and enhance the social responsibility and market competitiveness of enterprises;

[0018] 4. reduce the transformation cost: the application can be improved on the basis of the existing economizer structure, compatible with the existing structure, without large-scale demolition or reconstruction of the existing equipment, by retaining most of the original components and optimizing locally, the transformation cost is greatly reduced, and the design is compact and easy to install, reduces the time and complexity of on-site construction, and reduces the labor cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A structure diagram of a coal economizer structure of a waste incineration waste heat boiler is provided in the utility model.

[0020] Figure 2 For Figure 1 A-A cross-sectional view;

[0021] Figure 3 The structure diagram of the stop valve and the air pipe.

[0022] In the figure: 1 pipe box, 2 heat exchange pipe one, 3 heat exchange pipe two, 4 water supply introduction pipe, 5 connecting pipe, 6 water inlet header, 7 water outlet header, 8 collection header, 9 exhaust pipe, 10 lead-out pipe, 11 suspension beam, 12 air pipe, 13 stop valve. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0024] Referring to Figure 1 and Figure 2 , a coal economizer structure of a waste incineration waste heat boiler comprises:

[0025] The pipe box 1 is provided with a heat exchange pipe system in the pipe box 1, the heat exchange pipe system comprises a plurality of heat exchange pipe twos 3 and a plurality of heat exchange pipe ones 2, the heat exchange pipe one 2 and the heat exchange pipe two 3 are both in a serpentine structure, further, the suspension beam 11 is arranged above the pipe box 1, the heat exchange pipe system is hung on the suspension beam 11 through a steel cable, and the suspension beam 11 is suspended and fixed on a girder through the steel cable, so that the shielding of the fixing device to the pipe system can be reduced, and the heat exchange efficiency is ensured;

[0026] The water supply introduction pipe 4 is provided with a plurality of connecting pipes 5 in communication thereon, and the water supply introduction pipe 4 is used for introducing a water source to be heat exchanged;

[0027] The distribution header is in communication with the end section of the distribution header;

[0028] The collection header 8, the two ends of the heat exchange pipe one 2 are in communication with the collection header 8 and the end of the distribution header respectively, and the two ends of the heat exchange pipe two 3 are in communication with the collection header 8 and the middle part of the distribution header respectively;

[0029] A plurality of lead-out pipes 10 are in communication with the middle section of the distribution header, and the structure of the application can be designed in several stages in actual application, and the water discharged from the lead-out pipe 10 can enter the water supply introduction pipe 4 of the next stage to be heat exchanged;

[0030] Specifically, the distribution header tank is composed of three sections, each adjacent section is not connected, the two end sections are the water inlet header tank 6, which is connected with the water inlet pipe 4 through the connecting pipe 5, so that the water source can enter the inside of the heat exchange pipe 2, the middle section is the water outlet header tank 7, so that the water source after heat exchange can enter the outlet pipe 10 through the section, and the whole structure is symmetrically arranged from the top view, so that the water source can be orderly and sequentially heat exchanged and discharged.

[0031] The specific working process is as follows: during heat exchange, the water source is introduced into the water inlet pipe 4, the water source can enter the water inlet header tank 6 through the connecting pipe 5, then enter the inside of the heat exchange pipe 2 for heat exchange, the water source after preliminary heat exchange can then enter the collection header tank 8 for collection, and then enter the heat exchange pipe 2 for final heat exchange, the water source after heat exchange is introduced into the water outlet header tank 7 of the distribution header tank, and finally introduced into the required equipment through the outlet pipe 10. The design is improved on the basis of the existing structure, compared with the traditional pipe system design of one end water inlet and the other end water outlet, the structure proposed by the application can improve the medium flow rate in the pipe system under the condition of equal heating surface, increase the heat exchange capacity of the economizer, reduce the exhaust gas temperature, and improve the economic benefit.

[0032] Further, referring to Figure 3 , a plurality of exhaust pipes 9 are connected to the collection header tank 8 and the connecting pipe 5, which are used to exhaust air in the pipeline during water feeding, so as to prevent overpressure accidents. The air vent pipe 12 is arranged above the pipe tank 1, all the exhaust pipes 9 are connected to the air vent pipe 12, the air vent pipe 12 is provided with a stop valve 13, the air vent pipe 12 is located above all the exhaust pipes 9, the exhaust pipes 9 are vertically arranged, the connection between the exhaust pipes 9 and the connecting pipe 5 is located at the highest point of the connecting pipe 5, and the connection between the exhaust pipes 9 and the collection header tank 8 is located at the highest point of the collection header tank 8. Such design helps air to rise and exhaust, significantly shortens the exhaust time and improves the exhaust thoroughness, thereby reducing air resistance caused by air and improving heat exchange efficiency. The air vent pipe 12 and the exhaust pipe 9 are made of carbon steel material, which ensures the stability of the structure.

[0033] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A coal economizer structure of a waste incineration heat recovery boiler, characterized by, The application relates to a heat exchange device, which comprises: a pipe box (1) provided with a heat exchange pipe system, wherein the heat exchange pipe system comprises a plurality of heat exchange pipes II (3) and a plurality of heat exchange pipes I (2); a feed water introduction pipe (4) provided with a plurality of connecting pipes (5) in communication; a distribution header tank, wherein the connecting pipes (5) are in communication with end sections of the distribution header tank; a collection header tank (8), wherein two ends of the heat exchange pipes I (2) are in communication with the collection header tank (8) and end sections of the distribution header tank respectively, and two ends of the heat exchange pipes II (3) are in communication with the collection header tank (8) and middle sections of the distribution header tank respectively; a plurality of lead-out pipes (10) arranged in the middle sections of the distribution header tank.

2. The economizer structure of a waste incineration heat recovery boiler according to claim 1, characterized by, A plurality of exhaust pipes (9) are arranged in communication on the collection header tank (8) and the connecting pipes (5).

3. The economizer structure of a waste incineration heat recovery boiler according to claim 2, characterized by, An air pipe (12) is arranged above the pipe box (1), all the exhaust pipes (9) are in communication with the air pipe (12), and a stop valve (13) is arranged on the air pipe (12).

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

5. The economizer structure of a waste incineration heat recovery boiler according to claim 4, characterized by The exhaust pipes (9) are arranged vertically, the connecting positions of the exhaust pipes (9) and the connecting pipes (5) are located at the highest points of the connecting pipes (5), and the connecting positions of the exhaust pipes (9) and the collection header tank (8) are located at the highest points of the collection header tank (8).

6. The economizer structure of a waste incineration heat recovery boiler according to claim 5, characterized by The air pipe (12) and the exhaust pipes (9) are made of carbon steel.

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