CN102374821B - Rectification and guidance combined forced air cooling multi-tube cooler - Google Patents

Abstract

The invention relates to a rectification and guidance combined forced air cooling multi-tube cooler and belongs to the technical field of air coolers. The invention aims to provide the rectification and guidance combined forced air cooling multi-tube cooler, which has a reasonable structure and can effectively improve the flow state of inlet airflow, reduce impact abrasion of large-particle dust in dusty fume on the cooler and reduce operation resistance of the cooler. The rectification and guidance combined forced air cooling multi-tube cooler comprises a box body, ash hoppers, tube bundle units, a gas collecting box and axial flow fans, wherein the tops of the outer sides of two adjacent ash hoppers (1) are provided with an air inlet pipeline (6) and an air outlet pipeline (5); a fume rectification device (61) which has a grid-shaped cross section and consists of a plurality of fins is arranged in the air inlet pipeline; and a pneumatic shutter type guidance device (62) is arranged on a combining part of the air inlet pipeline and an ash hopper. The rectification and guidance combined forced air cooling multi-tube cooler has the characteristics of simple structure, environmental protection, high economy and applicability, energy conservation, good cooling effect and the like.

Description

Rectification and diversion combined forced air-cooled multi-tube cooler

technical field

The invention relates to a rectification and diversion combined forced air-cooled multi-pipe cooler, which belongs to the technical field of air coolers.

Background technique

In recent years, cement, iron and steel, metallurgy and other industries use multi-tube coolers to cool down high-temperature dusty flue gas, which has become very common. The multi-pipe cooler uses the principle of heat dissipation on the surface of the air pipe to achieve the purpose of cooling the flue gas in the pipe through the heat exchange between the high-temperature flue gas in the pipe and the air outside the pipe. Multi-tube coolers are divided into two forms: natural convection air cooling and forced air cooling. Compared with natural convection air cooling, forced air cooling uses axial flow fans to flow cold air through the tube bundle at a higher speed, because of its remarkable heat exchange effect , the flue gas cooling effect is better, and the equipment volume is relatively smaller and more widely used. However, for conventional forced air-cooled multi-tube coolers, when the high-temperature dust-laden flue gas first enters the upper gas collection box of the multi-tube cooler at high speed and then directly enters the inside of the tube bundle, it will inevitably cause a sudden increase in the local resistance inside the cooling equipment, and at the same time, the dust-laden smoke will High-concentration and highly abrasive particles in the air will cause serious erosion to the inner wall of the gas collection box and tube bundle, and accelerate equipment wear and aging; The number of operating units can achieve the goal of energy saving, but the dusty flue gas still has to pass through the upper gas collection box and tube bundle, and be discharged from the outlet of the lower ash hopper, so the running resistance of the equipment is still high.

Contents of the invention

The purpose of the present invention is to address the deficiencies of the prior art, to provide a rectification and rectifier with a reasonable structure, which can effectively improve the flow state of the inlet airflow, reduce the impact and wear of the cooler by the large particles of dust in the dusty flue gas, and reduce the running resistance of the cooler. Diversion combined forced air-cooled multi-tube cooler.

Its technical solution is: a rectification and flow diversion combined forced air-cooled multi-tube cooler, including a box body, an ash hopper, a tube bundle unit, a gas collection box and an axial flow fan. It is characterized in that: two adjacent ash hoppers The outer top of the outside is provided with an air inlet duct and an air outlet duct respectively; the air inlet duct is equipped with a flue gas rectification device with a grid-shaped cross-section composed of multiple fins; the joint between the air inlet duct and the ash hopper is installed Pneumatic louver-type deflector; it is characterized in that: the air collecting box on the upper part of the box is divided into two relatively independent spaces by the first flap valve, corresponding to the two adjacent tube bundle units respectively; the adjacent two A second flap valve is installed at the junction of the two ash hoppers.

Its technical effect is: because the air inlet duct of the dusty flue gas entering the cooler is changed to the upper end of two adjacent ash hopper sides, and a flue gas rectification device and a flow guide device are arranged in the air inlet duct, thereby It effectively improves the flow state of the air inlet airflow, reduces the running resistance of the cooler, reduces the impact and wear of the cooler by the large particles of dust in the dusty flue gas, prolongs the service life of the gas collection box and the tube bundle, and avoids the The dust-laden flue gas in the cooler directly enters the tube bundle from the gas collecting box, causing large running resistance, high concentration and high abrasive particles in the dust-laden flue gas, impact and wear on the inner wall of the gas collecting box and the tube bundle, etc. The utility model has the characteristics of simple structure, economy and applicability, environmental protection and energy saving, good cooling effect and the like.

Attached content

Fig. 1 is a structural representation of the present invention;

Figure 2 is a schematic diagram of the rectification device.

Detailed ways

As shown in Figures 1 and 2, a rectification and diversion combined forced air-cooled multi-tube cooler includes a box body, an ash hopper, a tube bundle unit, a gas collection box and an axial flow fan. The outer tops of two adjacent ash hoppers 1 are respectively provided with an air inlet duct 6 and an air outlet duct 5 . The air inlet duct is a top-to-bottom air inlet duct that gradually expands, and a flue gas rectification device 61 with a grid-shaped cross-section composed of multiple fins is installed in it to control the high-speed, high-temperature dust-laden smoke entering the cooler. The air is rectified in advance to improve the flow pattern of the air intake and reduce local resistance. Pneumatic louver-type deflector 62 is installed at the junction of the air inlet pipe and the ash hopper, so that the larger particles of dust in the dust-laden flue gas fall directly into the ash hopper to reduce its impact on the subsequent cooler tube bundle and gas collection box 3 impact and wear.

The air collecting box 3 on the upper part of the box body is divided into two relatively independent spaces by the flap valve 7, corresponding to the two adjacent tube bundle units 2 respectively. A flap valve 7 is also installed at the junction of adjacent ash hoppers.

Its working process is: when performing conventional cooling of high-temperature flue gas, open the flap valve 7 in the upper gas collection box 3 of the multi-tube cooler, and close the flap valve at the junction of the adjacent ash hopper 1 at the lower part. The flue gas first passes through the rectifying device 61 in the air inlet duct 6 to improve the flow state of the air intake air, and then passes through the pneumatic louver type guide device 62 at the junction of the air inlet duct 5 and the ash hopper to prevent the large particles in the dust-laden flue gas The dust is pre-collected to reduce its impact and wear on the subsequent cooler tube bundle and air collection box. After the dust-laden flue gas enters the ash hopper, since the flap valve at the joint of the adjacent ash hopper is closed, it is diverted to enter the tube bundle unit 2 on one side, and is cooled by the axial flow fan 4; Dust and smoke enter the gas collection box at the top of the side tube bundle unit through the tube bundle, and then pass through the flap valve installed in the gas collection box to enter the adjacent tube bundle unit on the other side

After recooling, it is finally discharged from the air outlet duct 5 arranged on the adjacent ash hopper.

When the external ambient temperature can meet the temperature required for natural cooling, the axial flow fan 4 can be stopped, the flap valve 7 in the gas collection box 3 can be closed, and the flap valve at the joint of the adjacent ash hopper can be opened to remove dust and smoke. After the air enters the cooler from the air inlet pipe, after rectification and diversion, it is directly discharged from the air outlet pipe of the adjacent ash hopper.

Claims (2)

1. A rectification and diversion combined forced air-cooled multi-tube cooler, including a box body, an ash hopper, a tube bundle unit, a gas collection box and an axial flow fan, and the outer tops of two adjacent ash hoppers (1) are respectively An air inlet duct (6) and an air outlet duct (5) are provided; a flue gas rectification device (61) with a grid-shaped cross-section composed of multiple fins is installed in the air inlet duct; the air inlet duct and the ash hopper Pneumatic louver-type deflector (62) is installed at the junction of the box body; it is characterized in that: the air collecting box (3) on the upper part of the box body is divided into two relatively independent spaces by the first flap valve (7), which are respectively connected to the Two adjacent tube bundle units (2) correspond to each other; a second flap valve (7) is installed at the junction of two adjacent ash hoppers (1). 2. A combined rectification and diversion type forced air-cooled multi-pipe cooler according to claim 1, characterized in that: the air inlet pipe (6) is a top-to-bottom gradually expanding pipe.

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