Closed cooling tower with steam heating calandria

Abstract

The utility model discloses a closed cooling tower with a steam heating calandria, which relates to the technical field of closed cooling towers and comprises a box body, a fan arranged at the top of the box body, a heat exchange tube group arranged in the box body, a water spraying tube group arranged above the heat exchange tube group, a water collector arranged above the water spraying tube group and the steam heating calandria arranged below the heat exchange tube group. A stand column frame is arranged on the outer side of the steam heating calandria, a water collecting disc is arranged below the stand column frame, and a circulating water pump connected with the water collecting disc and the water spraying pipe set is arranged outside the box body. According to the closed cooling tower with the steam heating calandria, provided by the utility model, after the steam heating calandria is communicated with transmitted high-temperature and high-pressure steam, air around the steam calandria is rapidly heated and then is diffused upwards along the internal space of the box body, so that the temperature around the heat exchange tube group is promoted to rise; therefore, the heat exchange tube group in the closed cooling tower can be prevented from being frozen, and the frost crack risk of the heat exchange tubes is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to closed cooling tower technical field especially relates to a closed cooling tower with steam heating discharge pipe. BACKGROUND

[0002] The closed cooling tower is a kind of cooling equipment, which places the tube heat exchanger in the tower, and ensures the cooling effect through the heat exchange of flowing air, spray water and circulating water. With the increasing attention to energy saving and emission reduction, water resource protection and other environmental protection issues, the traditional open cooling tower has problems such as large water consumption and water quality pollution, which cannot meet the environmental protection requirements. The closed cycle system of the closed cooling tower can effectively avoid water pollution and evaporation loss, reduce water consumption and environmental pollution, and meet the development trend of environmental protection.

[0003] If the medium in the pipe group is not emptied in time or the heat preservation measure is not in place when the machine is stopped in winter low temperature environment or when the machine is stopped for maintenance in winter, the medium stored in the pipe group may freeze, which may cause the heat exchange pipe to crack and affect the normal operation of the whole system.

[0004] Therefore, a closed cooling tower with steam heating discharge pipe is proposed, which effectively prevents the freezing of the heat exchange pipe group in the closed cooling tower and avoids the risk of heat exchange pipe cracking, so that the whole system can operate normally and quickly. UTILITY MODEL CONTENT

[0005] In view of the above problems that the medium in the pipe group may freeze and cause the heat exchange pipe to crack and affect the normal operation of the whole system when the machine is stopped in winter low temperature environment or when the machine is stopped for maintenance in winter, if the medium in the pipe group is not emptied in time or the heat preservation measure is not in place, the utility model is proposed.

[0006] To solve the above technical problems, the utility model provides the following technical scheme: a closed cooling tower with steam heating discharge pipe, comprising a box body, a fan is arranged on the top of the box body, a heat exchange pipe group is arranged in the box body, a water spraying pipe group is arranged above the heat exchange pipe group, a water collector is arranged above the water spraying pipe group, a steam heating discharge pipe is arranged below the heat exchange pipe group, an air inlet header and an air outlet header are arranged at both ends of the steam heating discharge pipe respectively, a column frame is arranged outside the steam heating discharge pipe, a water collecting disc is arranged below the column frame, a circulating water pump is arranged outside the box body, and the inlet and outlet of the circulating water pump are connected with the water collecting disc and the water spraying pipe group respectively.

[0007] Preferably, one end of the air inlet header is provided with a blocking blind plate, and the other end is arranged outside the box through the column frame, and the air inlet header outside the box is provided with an air inlet flange; one end of the air outlet header is provided with a blocking blind plate, and the other end is arranged outside the box through the column frame, and the air outlet header outside the box is provided with an air outlet flange.

[0008] Preferably, a water blocking plate is arranged between the air inlet header and the air inlet flange, and a water blocking plate is arranged between the air outlet header and the air outlet flange.

[0009] Preferably, a liquid discharge port is arranged on the air outlet header.

[0010] Preferably, the steam heating exhaust pipe comprises a water baffle, and the water baffle is arranged around the steam heating exhaust pipe and connected to the column frame.

[0011] Preferably, an air inlet louver is arranged above the water collecting disc.

[0012] Preferably, a floating ball valve is arranged in the water collecting disc, and the floating ball valve is used for water replenishment of the closed cooling tower.

[0013] Preferably, the water inlet and the water outlet of the circulating water pump are respectively provided with a lower circulating water pipe and an upper circulating water pipe, one end of the upper circulating water pipe is connected to the water spraying pipe group, one end of the lower circulating water pipe is connected to the water collecting disc, and a gate valve is arranged between the lower circulating water pipe and the circulating water pump.

[0014] The beneficial effects of the utility model are as follows:

[0015] When the closed cooling tower is stopped in a low-temperature environment in winter or is maintained in winter, the steam heating exhaust pipe is connected to the high-temperature and high-pressure steam transmitted, so that the air around the steam exhaust pipe is rapidly heated and diffused upward along the internal space of the box, the temperature around the heat exchange pipe group is increased, the heat exchange pipe group in the closed cooling tower can be effectively prevented from icing, the risk of cracking of the heat exchange pipe is avoided, and the whole system can be rapidly and normally operated. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the drawings without creative labor for those skilled in the art. Among them:

[0017] Fig. 1The utility model discloses a structure schematic diagram.

[0018] Fig. 2 The utility model discloses a side view structure schematic diagram.

[0019] Fig. 3 The utility model discloses a steam heating calandria structure schematic diagram.

[0020] Mark explanation:

[0021] 1, water baffle;2, box;3, water collector;4, shower pipe group;5, fan;6, heat exchange pipe group;7, float ball valve;8, water collecting tray;9, heating calandria;91, air inlet flange;92, water baffle;93, air inlet header;94, steam heating pipe;95, blanking blind plate;96, air outlet header;97, liquid discharge port;98, air outlet flange;10, upper liquid inlet;11, lower liquid outlet;12, stand column frame;13, air inlet louver;14, lower circulating water pipe;15, gate valve;16, circulating water pump;17, upper circulating water pipe. Specific implementation

[0022] In order to make above-mentioned purpose, feature and advantage of the utility model more obvious and easy to understand, below, combining with the specific implementation of the utility model of the drawing of the specification to detailed explanation.

[0023] Refer to Figs. 1 to 3 For one embodiment of the utility model, provide a kind of closed cooling tower with steam heating calandria, this closed cooling tower with steam heating calandria includes box 2, box 2 top is equipped with fan 5, box 2 inside is provided with heat exchange pipe group 6, heat exchange pipe group 6 top is provided with shower pipe group 4, shower pipe group 4 top is provided with water collector 3, heat exchange pipe group 6 below is provided with steam heating calandria 9, steam heating calandria 9 both ends are provided with air inlet header 93 and air outlet header 96 respectively, steam heating calandria 9 outside is provided with stand column frame 12, stand column frame 12 below is provided with water collecting tray 8, box 2 outside is provided with circulating water pump 16, the import and export of circulating water pump 16 are connected with water collecting tray 8 and shower pipe group 4 respectively.

[0024] Specifically, the box 2 is provided with a heat exchange pipe group 6, the heat exchange pipe group 6 includes an upper liquid inlet 10 and a lower liquid outlet 11, the upper liquid inlet 10 and the lower liquid outlet 11 are connected with external refrigerant medium pipelines respectively, and are used for cooling the closed cooling tower, a water spraying pipe group 4 is arranged above the heat exchange pipe group 6, and a steam heating discharge pipe 9 is arranged below the heat exchange pipe group 6; when the closed cooling tower is stopped in a low-temperature environment in winter or is maintained in winter, the steam heating pipe 94 is connected with the high-temperature and high-pressure steam transmitted, the air around the steam discharge pipe can be rapidly heated, then the flow diffuses upwards along the internal space of the box 2, the temperature around the heat exchange pipe group 6 is increased, the heat exchange pipe group 6 is prevented from icing, the risk of cracking of the heat exchange pipe is avoided, and the whole system can be rapidly and normally operated.

[0025] Specifically, the water inlet and the water outlet of the circulating water pump 16 are respectively connected with a lower circulating water pipe 14 and an upper circulating water pipe 17, one end of the upper circulating water pipe 17 is connected to the water spraying pipe group 4, and the other end of the upper and lower circulating water pipes 14 is connected to the water collecting disc 8; a gate valve 15 is arranged between the lower circulating water pipe 14 and the circulating water pump 16, and the gate valve 15 can control the water amount entering the circulating water pump 16.

[0026] Specifically, a water collector 3 is arranged on the upper portion of the water spraying pipe group 4, and is used for collecting the gas mist and gas beads of the steam heating discharge pipe 9; a joint of the water spraying pipe group 4 is connected with the upper circulating water pipe 17 outside the box 2, water enters the water spraying pipe group 4 through the upper circulating water pipe 17, and a plurality of nozzles are arranged below the water spraying pipe group 4, so that the temperature inside the box 2 can be more quickly increased.

[0027] Specifically, the steam heating discharge pipe 9 is provided with a water baffle 1 around, the water baffle 1 is sealingly connected to a column frame 12, the bottom of the column frame 12 is connected with the water collecting disc 8, a float ball valve 7 is arranged in the water collecting disc 8, the float ball valve 7 is used for being connected with an external water source, and the closed cooling tower is water-supplied; an air inlet louver 13 is arranged around the upper portion of the water collecting disc 8, and the water collecting disc 8 is connected with the lower circulating water pipe 14.

[0028] Specifically, the steam heating discharge pipe 9 includes a steam heating pipe 94, an air inlet header 93 and an air outlet header 96, the steam heating pipe 94 is weldingly connected with the air inlet header 93 and the air outlet header 96 at two ends respectively, one end of the air inlet header 93 is weldingly connected with a blanking blind plate 95, and the other end of the air inlet header 93 passes through the column frame 12 and is arranged outside the box 2; an air inlet flange 91 is weldingly arranged on the air inlet header 93 outside the box 2, and a water blocking plate 92 is weldingly arranged between the air inlet header 93 and the air inlet flange 91; one end of the air outlet header 96 is weldingly connected with the blanking blind plate 95, and the other end of the air outlet header 96 passes through the column frame 12 and is arranged outside the box 2; an air outlet flange 98 is arranged on the air outlet header 96 outside the box 2, and the water blocking plate 92 is weldingly arranged between the air outlet header 96 and the air outlet flange 98; further, a threaded sealing liquid discharge port 97 is weldingly arranged on the air outlet header 96, and the air inlet flange 91 and the air outlet flange 98 are respectively connected with external steam pipelines.

[0029] Working principle: In winter low temperature environment or winter shutdown maintenance, the steam heating pipe 9 continues to connect the high temperature and high pressure steam from the outside, so that the heat exchange pipe group 6 in the upper box 2 is always in a high temperature area, effectively prevent the heat exchange pipe group 6 in the closed cooling tower from freezing, avoid the risk of heat exchange pipe cracking, can make the whole system start quickly, reduce the waiting time. When the equipment is started, the fan 5 and the circulating water pump 16 are started, so that the dry cold air enters from the lower air inlet shutter 13, exchanges heat and mass with the circulating water flowing down from the upper part, absorbs heat and moisture, and becomes hot and humid air after the heat and mass are exchanged, and is discharged from the top air outlet. The cooling medium enters from the upper liquid inlet 10 of the heat exchange pipe group 6, and after multiple rounds in the heat exchange pipe group 6, it exchanges heat with the circulating water, and is discharged from the lower liquid outlet 11 of the heat exchange pipe group 6. The circulating water is pumped by the circulating water pump 16 to the water spraying pipe group 4, and is uniformly distributed to the outer surface of the heat exchange pipe group 6, and at the same time, heat transfer occurs between the medium in the pipe and the external air, a small amount of water evaporates into the air, and most of the water falls back to the water collecting disc 8 and is circulated again. Therefore, it has the advantages of reasonable structure layout, convenient installation, prominent practical function, can effectively prevent the freezing of the working medium in the condenser pipe group in winter low temperature state equipment shutdown maintenance or intermittent operation, greatly reduces the operation and maintenance cost of the product, reduces the one-time investment and operation cost, and has remarkable economic benefit.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalent, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A closed cooling tower with steam heated downcomers, comprising a tank (2), characterized in that: The box (2) top is provided with a fan (5), the box (2) inside is provided with heat exchange pipe group (6), the heat exchange pipe group (6) top is provided with water spray pipe group (4), the water spray pipe group (4) top is provided with water collector (3), the heat exchange pipe group (6) below is provided with steam heating exhaust pipe (9), the steam heating exhaust pipe (9) both ends are provided with air inlet header (93) and air outlet header (96) respectively, the steam heating exhaust pipe (9) outside is provided with column frame (12), the column frame (12) below is provided with water collecting tray (8), the box (2) outside is provided with circulating water pump (16), the inlet and outlet of the circulating water pump (16) are connected with the water collecting tray (8) and the water spray pipe group (4) respectively.

2. A closed cooling tower with steam heated downcomer as claimed in claim 1 wherein: The air inlet header (93) one end is provided with a blanking plate (95), the other end passes through the column frame (12) and is arranged outside the box (2), the air inlet header (93) outside the box (2) is provided with air inlet flange (91);The air outlet header (96) one end is provided with a blanking plate (95), the other end passes through the column frame (12) and is arranged outside the box (2), the air outlet header (96) outside the box (2) is provided with air outlet flange (98).

3. A closed cooling tower with steam heated downcomers as claimed in claim 2 wherein: The air inlet header (93) and the air inlet flange (91) are provided with a water stop plate (92), and the air outlet header (96) and the air outlet flange (98) are provided with a water stop plate (92).

4. A closed cooling tower with steam heated downcomers as claimed in claim 3 wherein: The air outlet header (96) is provided with a drain port (97).

5. A closed cooling tower with steam heated downcomer as claimed in claim 1 wherein: The steam heating exhaust pipe (9) includes a water baffle (1), the water baffle (1) is arranged around the steam heating exhaust pipe (9), and the water baffle (1) is connected to the column frame (12).

6. A closed cooling tower with steam heated downcomer as claimed in claim 1 wherein: The water collecting tray (8) top is provided with an air inlet shutter (13).

7. A closed cooling tower with steam heated downcomer as claimed in claim 1 wherein: The water collecting tray (8) inside is provided with a floating ball valve (7) for closed cooling tower water replenishment.

8. A closed cooling tower with steam heated downcomer as claimed in claim 1 wherein: The water inlet and water outlet of the circulating water pump (16) are provided with lower circulating water pipe (14) and upper circulating water pipe (17) respectively, the other end of the upper circulating water pipe (17) is connected to the water spray pipe group (4), the other end of the lower circulating water pipe (14) is connected to the water collecting tray (8), and the lower circulating water pipe (14) and the circulating water pump (16) are provided with a gate valve (15).

Images