Anti-blocking device for coal economizer

Abstract

The utility model provides an economizer anti-blocking device, a heat exchanger is arranged in a smoke box, the heat exchanger is composed of finned tubes and bent tubes, a plurality of finned tubes are arranged in an array mode, the bent tubes are connected to the end portions of the finned tubes, the plurality of finned tubes are connected end to end through the bent tubes to form a water channel, and the finned tubes at the head end and the tail end are respectively provided with a water inlet pipe and a water outlet pipe. A smoke inlet channel and an upper air channel are arranged on the upper side of the smoke box, an ash discharge pipe and a smoke outlet channel are arranged on the lower side of the smoke box, the smoke inlet channel and the ash discharge pipe face each other vertically, the upper air channel and the smoke outlet channel face each other vertically, a first high-pressure air pipe is arranged on the upper air channel, a second high-pressure air pipe is arranged on the smoke inlet channel, and the first high-pressure air pipe and the second high-pressure air pipe are connected with an air supply device through an air supply pipeline. The device effectively purges dust and impurities on the finned tube by periodically introducing high-speed airflow, prevents the dust and the impurities from being deposited and blocked massively, and keeps the efficient heat exchange performance of the heat exchanger.

Description

Technical Field

[0001] The utility model relates to the field of thermal energy engineering equipment, in particular to an economizer anti-blocking device. Background Art

[0002] The economizer is a crucial component in boilers, used to preheat boiler feedwater, reduce exhaust gas temperature, and improve boiler efficiency. However, in practice, economizers are prone to clogging due to dust and impurities deposited in the flue gas, resulting in reduced heat exchange efficiency and even affecting normal boiler operation. Therefore, developing a device that effectively prevents economizer clogging is crucial for improving boiler efficiency and reducing energy consumption.

[0003] Traditional economizer blockage prevention methods mainly include regular cleaning and increasing flue gas flow rate. Although these methods can alleviate the blockage problem to a certain extent, they have disadvantages such as complex operation, high maintenance cost and frequent maintenance. Utility Model Content

[0004] Based on the above technical problems, the utility model proposes an economizer anti-blocking device, which can effectively prevent the economizer from being blocked due to dust and impurities deposited in the flue gas, improve heat exchange efficiency and reduce maintenance costs.

[0005] A coal economizer anti-blocking device comprises: a smoke box and a heat exchanger, the heat exchanger is arranged in the smoke box, the heat exchanger consists of fin tubes and bent tubes, the fin tubes are provided with evenly spaced fins, a plurality of the fin tubes are arranged in an array, the bent tubes are connected to the ends of the fin tubes, and the plurality of fin tubes are connected end to end through the bent tubes to form a water channel, and the fin tubes at the head and tail ends are respectively provided with a water inlet pipe and a water outlet pipe; a smoke inlet duct and an upwind duct are provided on the upper side of the smoke box, an ash discharge pipe and a smoke outlet are provided on the lower side of the smoke box, the smoke inlet duct and the ash discharge pipe are directly opposite to each other up and down, the upwind duct and the smoke outlet are directly opposite to each other up and down, a first high-pressure air duct is provided on the upwind duct, a second high-pressure air duct is provided on the smoke inlet duct, and the first high-pressure air duct and the second high-pressure air duct are connected to the air supply device through an air supply duct.

[0006] Preferably, the first high-pressure air duct and the second high-pressure air duct introduce vertically downward high-speed airflow into the smoke box.

[0007] Preferably, the ash discharge pipe is provided with a pipe sealing door that can be opened and closed controllably.

[0008] Preferably, the ash discharge pipe is connected to the ash pipe of the ash collecting device.

[0009] Beneficial effects:

[0010] 1. This device periodically introduces high-speed airflow to effectively blow away dust and impurities on the fin tubes, preventing them from being deposited and blocked, and maintaining the efficient heat exchange performance of the heat exchanger;

[0011] 2. The smoke box is equipped with an ash discharge pipe facing the smoke inlet and an upper air duct facing the smoke outlet. When the smoke box is operating normally, the first and second high-pressure air ducts and the ash discharge pipe are periodically opened to blow away the light ash on the fin tube and reduce the speed of dust accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Shows the structure of the utility model Figure 1 ;

[0013] Figure 2 Shows the structure of the utility model Figure 2 ;

[0014] Figure 3 Shows a schematic structural diagram of the economizer of the utility model;

[0015] Figure 4 The figure shows the flow direction of water in the fin tube of the utility model. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0017] like Figures 1 to 4 The economizer anti-blocking device shown includes: a smoke box 1 and a heat exchanger 2. The heat exchanger 2 is arranged in the smoke box 1. The heat exchanger 2 consists of finned tubes 21 and bent tubes 22. The finned tubes 21 are provided with evenly spaced fins 25. Multiple finned tubes 21 are arranged in an array. The bent tubes 22 are connected to the ends of the finned tubes 21. Multiple finned tubes 21 are connected end to end through the bent tubes 22 to form a water channel. The finned tubes 21 at the head and tail ends are respectively provided with an inlet pipe 23 and an outlet pipe 24. The inlet pipe 23 is located at the lower part of the heat exchanger 2. Cold water enters from the inlet pipe 23, flows upstream from the bottom and out of the outlet pipe 24, and is converted into hot water through heat exchange with high-temperature flue gas.

[0018] The smoke box 1 is provided with a smoke inlet 3 and an upwind duct 7 on the upper side, and an ash discharge pipe 5 and a smoke outlet 4 on the lower side. The smoke inlet 3 and the ash discharge pipe 5 are directly opposite to each other up and down, and the upwind duct 7 and the smoke outlet 4 are directly opposite to each other up and down. The high-temperature flue gas enters the smoke box 1 from the smoke inlet 3, and then passes through the heat exchanger 2 and is discharged from the smoke outlet 4 on the lower side of the smoke box 1. A first high-pressure air duct 9 is provided on the upwind duct 7, and a second high-pressure air duct 8 is provided on the smoke inlet 3. The first high-pressure air duct 9 and the second high-pressure air duct 8 are connected to the air supply device through an air supply pipe 10. The first high-pressure air duct 9 and the second high-pressure air duct 8 introduce a vertically downward high-speed air flow into the smoke box 1. The first high-pressure air duct 9 and the second high-pressure air duct 8 can send a high-speed air flow into the smoke box 1 to impact the fin tube 21 and the fins to avoid long-term retention of floating dust. The first high-pressure air duct 9 and the second high-pressure air duct 8 are opened intermittently for a short time to maintain the highest wind speed without affecting the normal circulation of smoke.

[0019] In a possible real-time manner, a cleaning and maintenance door 11 that can be opened and closed is provided on one side of the smoke box 1 .

[0020] In a possible real-time method, the dust discharge pipe 5 is provided with a controllable pipe sealing door 6 , which is opened synchronously with the first high-pressure air pipe 9 to blow out the dust in front of the fin tube 21 .

[0021] In a possible real-time method, the ash discharge pipe 5 is connected to the ash pipe of the ash collecting device, and a controlled opening and closing device is set on the ash discharge pipe 5. When the first high-pressure air duct 9 is opened, the ash discharge pipe 5 will be connected to the ash pipe to complete the ash cleaning.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A coal economizer anti-blocking device, characterized in that: include: A smoke box and a heat exchanger, wherein the heat exchanger is arranged in the smoke box, and the heat exchanger consists of fin tubes and bent tubes. The fin tubes are provided with fins with uniform intervals, and a plurality of the fin tubes are arranged in an array, and the bent tubes are connected to the ends of the fin tubes. The plurality of fin tubes are connected end to end through the bent tubes to form a water channel, and the fin tubes at the head and tail ends are respectively provided with a water inlet pipe and a water outlet pipe; a smoke inlet duct and an upwind duct are provided on the upper side of the smoke box, and an ash discharge pipe and a smoke outlet are provided on the lower side of the smoke box, the smoke inlet duct and the ash discharge pipe are directly opposite to each other up and down, and the upwind duct and the smoke outlet are directly opposite to each other up and down, a first high-pressure air duct is provided on the upwind duct, and a second high-pressure air duct is provided on the smoke inlet duct, and the first high-pressure air duct and the second high-pressure air duct are connected to the air supply device through an air supply duct.

2. The economizer anti-blocking device according to claim 1, characterized in that: The first high-pressure air duct and the second high-pressure air duct introduce vertically downward high-speed airflow into the smoke box.

3. The economizer anti-blocking device according to claim 1, characterized in that: The ash discharge pipe is provided with a pipe sealing door that can be controlled to open and close.

4. The economizer anti-blocking device according to claim 1, characterized in that: The ash discharge pipe is communicated with the ash pipe of the ash collecting device.

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