An air inlet optimization device for air cooling tower with temperature reduction nozzle

Abstract

The invention patent discloses an air inlet optimization device for an air cooling tower with a temperature reduction nozzle, the device includes a bracket and a cascade arranged vertically along the outside of the radiator area of ​​the air cooling tower, the bracket is located on the outside of the cooling triangle unit, and is fixed near the outer line of the cooling column of two adjacent cooling triangle units; the cascade is composed of blades, which are located on the bracket, and a nozzle-like tapered channel is formed between two adjacent blades; the blade is a hollow structure, with wind-dividing fins on the outside, headers at both ends, and a cold water inlet and outlet at the bottom header. During the actual operation of the air cooling tower, the temperature of the ambient air decreases and the speed increases when passing through the nozzle structure of the cascade. The cascade has a regulating effect on the wind direction of the ambient air, which can effectively improve the air flow field structure inside the cooling triangle unit and improve the heat exchange effect of the radiator; cold water can be introduced into the blades through the header to reduce the temperature of the ambient air entering the cooling triangle unit, thereby improving the cooling performance of the air cooling tower.

Description

Technical Field

[0001] The invention belongs to the technical field of air cooling towers in thermal / nuclear power plants, and in particular relates to an air inlet optimization device for an air cooling tower with a temperature reducing nozzle. Background Art

[0002] In recent years, air-cooled generator sets have been widely used in coal-rich and water-deficient areas of my country due to their excellent water-saving performance. For a specific air-cooling system, when the unit load, cooling water flow, cold end cleanliness and shutter opening remain unchanged, the temperature and speed of the air inlet to the air-cooling tower are the main factors affecting the water outlet temperature of the air-cooling tower. Especially under high temperature conditions in summer, the air inlet temperature of the air-cooling tower is high, the heat exchange performance of the radiator is poor, and the water outlet temperature of the air-cooling tower increases, which directly affects the cooling efficiency and economy of the air-cooling unit.

[0003] Chinese patent application, application number 201810614093.5, discloses a natural ventilation air cooling tower with nozzle evaporative precooling and a cooling method, comprising: a nozzle, the nozzle system comprising a nozzle system arranged outside the air inlet of the tower and with a water spraying direction perpendicular to the central axis of the tower, and a nozzle system arranged directly below the heat exchanger and with a water spraying direction parallel to the central axis of the tower. A natural ventilation air cooling tower with nozzle evaporative precooling and a cooling method: (1) The water distribution system comprises an annular water distribution pipe and a vertical water distribution pipe, both of which are connected to an external water source, (2) A plurality of vertical nozzles in the vertical nozzle system are arranged in a cylindrical shape along the air inlet and installed on the vertical water distribution pipe, and the plurality of vertical nozzles on the same vertical water distribution pipe are arranged in a dense manner from top to bottom, (3) A plurality of annular water distribution pipes are arranged concentrically, and the diameter difference between two adjacent annular water distribution pipes is constant, and (4) A top cover is provided between the vertical nozzle system and the tower, and the top cover is an annular plate sleeved on the tower. Although this invention utilizes evaporative cooling to cool the inlet air of the air-cooling tower, thereby improving the efficiency of the natural ventilation air-cooling tower in summer, this invention does not adjust the inlet air flow and temperature according to the nozzle and its surrounding structure, and the structure and optimization purpose of the nozzle are completely different from those of this application. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide an air inlet optimization device for an air-cooling tower with a temperature reducing nozzle, which is used to solve the problems that under high temperature conditions in summer, the inlet air temperature of the air-cooling tower is high, the heat exchange performance of the radiator is poor, the outlet water temperature of the air-cooling tower is increased, and the cooling efficiency of the air-cooling unit is reduced. The present invention reduces the inlet air temperature of the air-cooling tower, increases the inlet air velocity, and thereby improves the heat exchange performance of the air-cooling tower.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] An air inlet optimization device for an air-cooling tower with a temperature reduction nozzle comprises a bracket and a cascade arranged vertically along the outside of the radiator area of ​​the air-cooling tower, and is characterized in that: the bracket is located outside the cooling triangle unit and is fixed near the outer line of the cooling columns of two adjacent cooling triangle units; the cascade is composed of blades and is located on the bracket, and a nozzle-like tapered channel is formed between two adjacent blades; the blade is a hollow structure, with headers at both ends and flow-equalizing fins on the outside; the bottommost header is provided with a cold water inlet and outlet, which can distribute water to the inside of the blade; the surface of the flow-equalizing fin is a corrugated structure, which can enhance the flow-equalizing effect on the ambient air.

[0007] The bracket is vertically arranged outside the cooling triangle unit of the air cooling tower, with a height equal to that of the widening platform of the air cooling tower, and is fixed near the outer line of two adjacent cooling columns.

[0008] The cascade is divided into n The width of each group is equal to the circumferential distance of a cooling triangle unit. l , the height is h / n ,in h To widen the platform height for the air cooling tower, n =1, 2, 3, 4, 5, 6.

[0009] The cascade is composed of blades, each of which is fixed on a bracket in a vertical state and is evenly spaced in the horizontal direction.

[0010] The blade is a wedge-shaped structure with curved surfaces on both sides, and two adjacent blades can form a nozzle-like tapered channel in the horizontal direction.

[0011] The outer edge of the tip of the blade of the wedge-shaped structure is provided with a flow-balancing fin, and the surface of the flow-balancing fin is a corrugated structure.

[0012] The blade has an internal hollow structure, and both ends of the blade are connected to the header. The bottom header is provided with a cold water inlet and outlet. A valve is provided at the cold water inlet to open or close the cooling water channel and adjust the cooling water flow in the blade.

[0013] Compared with the existing technology, the beneficial effects of the present invention are as follows:

[0014] The present invention discloses an air inlet optimization device for an air-cooling tower with a temperature reducing nozzle. The device provides a blade grid outside a cooling triangle air inlet. The blade grid is composed of wedge-shaped hollow blades with curved surfaces on both sides. The blades are wedge-shaped structures with curved surfaces on both sides. Two adjacent blades can form a nozzle-like tapered channel in the horizontal direction. Both ends of the blades are connected to a header. The bottom header is provided with a cold water inlet and outlet. A valve is provided at the cold water inlet for opening or closing the cold water channel and regulating the cold water flow in the blades. By introducing cold water into the blades and forming a nozzle-like tapered channel between two adjacent blades, the inlet air temperature of the air-cooling tower is reduced and the inlet air velocity is increased, thereby improving the heat exchange performance of the air-cooling tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objectives and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0016] Figure 1 The present invention is a schematic diagram of the layout of an air-cooling tower air inlet optimization device with a temperature reduction nozzle.

[0017] Figure 2 The present invention is a top view of an air inlet optimization device for an air cooling tower with a temperature reduction nozzle.

[0018] Figure 3 The present invention is a cross-sectional view of a blade of an air-cooling tower air inlet optimization device with a temperature reduction nozzle.

[0019] In the figure: 1-cooling triangle; 2-blade grid; 3-blade; 4-header; 5-bracket; 6-flow balancing fin. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0021] In the present invention, Figure 1 As shown, an air-cooling tower air inlet optimization device with a temperature reduction nozzle of the present invention is arranged outside the cooling triangle 1, and its width is equal to the circumferential distance of a cooling triangle unit of the air-cooling tower. For the convenience of installation and maintenance, the device is divided into six parts in the vertical direction, and the total height is equal to the height of the widening platform of the air-cooling tower; the air inlet optimization device mainly includes a cascade 2 and a bracket 5, the cascade 2 is composed of a plurality of groups of vertically arranged blades 3, the two sides of the blade 3 are curved wedge-shaped structures, and two adjacent blades can form a nozzle-like tapered channel in the horizontal direction, the interior of the blade 3 is a hollow structure, and its two ends are connected to a header 4, and the header 4 can distribute cold water to each blade to ensure the smooth flow of the cold water channel, and the bottom header 4 is provided with a cold water inlet and outlet, and a valve is provided at the cold water inlet, which can be used to open or close the cold water channel and adjust the cold water flow inside the blade.

[0022] When the air cooling system operates under high temperature conditions in summer, the optimization device can appropriately increase the cold water flow in the blade 3 according to the ambient temperature and the cooling water temperature, and combine with the nozzle formed by two adjacent blades 3 to reduce the ambient wind temperature and increase the ambient wind speed, thereby improving the heat exchange effect of the air cooling tower; when the air cooling system operates under spring or autumn conditions, the valve at the cold water inlet of the header 4 can be appropriately closed to reduce the cold water flow in the blade 3; when the air cooling system operates under severe cold conditions in winter, the ambient air temperature is low, and the valve at the cold water inlet of the header 4 can be directly closed, and the ambient air can be regulated only by the action of the blades 3 and the nozzles, which can improve the air flow field distribution inside the cooling triangle unit and improve the heat exchange performance of the radiator.

[0023] like Figure 2 As shown, a top view of an air inlet optimization device for an air-cooling tower with a temperature reducing nozzle of the present invention is shown, wherein the blade grid 2 is composed of blades 3 arranged at equal intervals in the horizontal direction, and two adjacent blades can form a tapered channel similar to a nozzle structure in the horizontal direction. By utilizing the characteristic of cooling air when passing through the nozzle, the inlet air temperature of the air-cooling tower can be reduced, the cooling effect of the radiator can be improved, and the cooling capacity of the air-cooling tower can be enhanced.

[0024] like Figure 3 As shown, it is a cross-sectional view of the blade. The bottom surface of the blade 3 is parallel to the louver plane. The tip outer edge of the blade is provided with a flow-averaging fin, and its surface is a corrugated structure, which helps to adjust the wind direction entering the cooling triangle unit and improve the air flow field structure inside the cooling triangle unit.

[0025] The present invention discloses an air inlet optimization device for an air cooling tower with a temperature reducing nozzle. The device arranges a blade grid composed of vertical wedge-shaped blades on the outer side of the air inlet of a cooling triangle unit, and reduces the air inlet temperature of the air cooling tower and increases the air velocity at the radiator inlet by utilizing the cooling effect of cold water inside the blades and the nozzles formed by adjacent blades, thereby improving the cooling effect of the air cooling tower radiator, reducing the back pressure of the unit, and improving the economic efficiency of the unit operation.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claim involved.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An air inlet optimization device for an air cooling tower with a temperature reduction nozzle, comprising a bracket and a cascade arranged vertically along the outer side of the radiator area of ​​the air cooling tower, characterized in that: The bracket is located outside the cooling triangle unit and is fixed near the outer line of the cooling column of two adjacent cooling triangle units; the cascade is composed of blades and is located on the bracket, and a nozzle-like tapered channel is formed between two adjacent blades; the blade is a hollow structure, with headers at both ends and flow-equalizing fins on the outside; the header at the bottom is provided with a cold water inlet and outlet, which can distribute water to the inside of the blade; the surface of the flow-equalizing fin is a corrugated structure, which can enhance the flow-equalizing effect on the ambient air. The bracket is vertically arranged outside the cooling triangle unit of the air cooling tower, with a height equal to the height of the widening platform of the air cooling tower, and is fixed near the outer line of two adjacent cooling columns. The blade cascade is divided into n groups in the vertical direction, and the width of each group is equal to the circumferential distance l of a cooling triangle unit, and the height is h / n, where h is the height of the widened platform of the air cooling tower, and n=1, 2, 3, 4, 5 or 6. The cascade is composed of blades, each of which is fixed on a bracket in a vertical state and is evenly spaced in the horizontal direction. The blades are wedge-shaped structures with curved surfaces on both sides, and a nozzle-like tapered channel is formed between two adjacent blades in the horizontal direction. The outer edge of the tip of the wedge-shaped blade is provided with a flow-balancing fin, and the surface of the flow-balancing fin is a corrugated structure. The blade is an internal hollow structure, and both ends of the blade are connected to the header. The bottom header is provided with a cold water inlet and outlet. A valve is provided at the cold water inlet to open or close the cold water channel and adjust the cold water flow in the blade.

Images