JPH04136694A - Cooling tower - Google Patents

Abstract

PURPOSE:To permit the pulling-out and the replacement of a naked tube and a finned tube individually by a method wherein tube spacers of one side are connected to each other through a connecting piece and are arranged so as to be free of pulling-out and replacement while one end of the naked tube is connected to one end of the finned tube detachably in series through a joint near the tube spacers of the other side to form one piece of cooling coil. CONSTITUTION:Respective sealed type heat exchangers B are constituted of one piece of cooling coil 60 while the cooling coil 60 is constituted of a plurality of parallel naked tubes 60a and finned tubes 60b, whose one end is connected in series to one end of the naked tube 60a detachably through an universal joint 60c. A plurality of U-type bent tubes 62, connecting the ends of straight tubes 61 of respective naked tubes 60a and finned tubes 60b and forming a meandering passage to be cooled while positioning at both sides of a plurality of tubes, are supported by a pair of different left and right tube spacers C1, C2. The tube spacer C2 of one side and the tube spacer C1 are positioned at mutually opposing intermediate positions while the ends of the tube spacer C2 and the tube spacer C1 of the other side are extended into directions approaching to each other and are connected detachably by a connecting part 70 such as a pin and the like whereby the taking-out of the heat exchanger from a cooling tower can be effected easily.

Description

[Detailed Description of the Invention] A1.Objective of the Invention <Industrial Application Field> This invention provides a plurality of nearly horizontal closed heat exchangers arranged vertically and hierarchically inside the main body of the cooling tower. The present invention relates to a cooling tower in which the supply and discharge sections of an exchanger are each connected to a corresponding common supply or discharge header.

<Prior art> Various types of cooling towers of this type have been developed on the market before this application, and an example is the Utility Model Application No. 63-190.
It is described in Publication No. 764.

<Problems to be Solved by the Invention> The heat exchanger in the cooling tower described in the above publication is used by being built into the main body of the cooling tower in multiple stages, and the bare tube and finned tube of the cooling coil are installed in series, Because the side frame is integrated, when replacing it, the heavy heat exchanger for each stage, that is, the entire cooling coil, must be pulled out into the cooling tower together with the side frame. Modern large cooling towers have increased in height and width, and separating heat exchangers located at high places in narrow cooling towers is not only labor intensive but also quite troublesome, leading to falling accidents. It is also the cause.

It is an object of the present invention to overcome these drawbacks of the prior art5 and to provide a cooling tower in which a heat exchanger can be easily removed from the cooling tower.

Configuration of the Invention (Means for Solving the Problems) In order to solve the above problems, the present invention provides a plurality of substantially horizontal closed heat exchangers under the cooling tower upper sprinkler,
In a cooling tower that is arranged in multiple stages in a hierarchical manner, and the supply section and discharge section of each closed heat exchanger in each stage are removably connected to the corresponding common supply header or discharge header, The bare tubes and finned tubes in a closed heat exchanger are supported by a pair of separate and independent tube spacers at the U-shaped bent tube portions on both sides, and the tube spacers on one side are connected to each other using connectors that can be attached and detached to each other. The drawer is connected to the cooling tower machine frame so that the drawer can be replaced, and one end of the bare tube and one end of the finned tube are removably connected in series with a joint near the pipe spacer on the other side. It is a cooling tower characterized by forming a cooling coil.

The cooling tower is a cross-flow cooling tower, the supply header is located near the exhaust port of the cooling tower, the discharge header is located near the outside air intake of the cooling tower, and the secondary It is preferable that the main side of the finned tube is detachably attached to the discharge header and the primary side of the finned tube is detachably attached to the supply header.

It is desirable for a cross-flow cooling tower that an eliminator is disposed vertically in the middle between the finned tube and the bare tube.

(Operation) Next, the operation of the specific invention will be explained together with the operation of the invention described in claim 2.

Similar to this type of cross-flow cooling tower, in winter, to prevent the generation of white smoke, spray water is sprayed down only on the bare pipes, and spray water is sprayed on the fin pipes near the exhaust port. Do not spray.

Therefore, the air immediately taken in from the outside air intake comes into direct contact with the sprayed water, cools the sprayed water by the latent heat of vaporization, slightly raises its temperature, and passes through the bare pipe. Next, in the finned pipe that has not been sprayed with spray water, the circulating cooling water, which is still at a high temperature and has been sent from the load section through the supply header into the finned pipe, indirectly covers the outer periphery of this bare pipe. The air that passes through it comes into contact with it and is heated.

As a result of this heating, the air becomes high in temperature and is sucked into the exhaust port with its relative humidity reduced, and is exhausted to the atmosphere without becoming supersaturated air, that is, without turning into white smoke.

In the invention according to claim 3, since the eliminator is vertically disposed between the bare pipe and the finned pipe, the water sprayed onto the bare pipe collides with the surface of the bare pipe during winter operation. The eliminator catches the water droplets that are scattered and try to flow toward the exhaust port by riding the air flow sucked in from the outside air intake port, and in the case of a finned tube, the water droplets do not adhere to the outer circumferential surface of the pipe and the air is heated to a high temperature.

When removing the heat exchanger from the cooling tower body due to periodic cleaning of the cooling tower or damage to the closed type heat exchanger, connect the common supply header, discharge header, and the finned tubes and bare tubes of the heat exchanger. Remove each. Next, the entire heat exchanger is moved inward with respect to the cooling tower frame in the longitudinal axis direction of the tube spacer, that is, directly below the exhaust port, and first the finned tube portion is pulled out from the cooling tower frame. Next, remove the union joint that connects the finned tube and the bare tube.

Remove the connector connecting the pipe spacers of the finned pipe and the bare pipe.

In this state, shift the finned tube laterally with respect to the bare tube, that is, in a direction perpendicular and horizontal to the longitudinal axis of the tube spacer, and move the finned tube and its tube spacer to the bare tube and the opposing tube spacer. Separate and take out. Next, if it is necessary to repair the bare pipe, remove the eliminator, pull the bare pipe inside the cooling tower machine frame together with the corresponding spacer, remove it from the main body, remove any attached dust, sand, etc. Repair damage or replace finned tubes and bare tubes with new ones.

(Example) Next, typical embodiments of the present invention will be specifically described.

In Fig. 1, A is a cross-flow type cooling tower, and inside this cooling tower A, a plurality of closed heat exchangers B are arranged vertically and hierarchically, and each closed heat exchanger B is arranged horizontally. The supply section and the discharge section are each removably connected to a corresponding common supply header 15 or discharge header 16, and the discharge header 16 is located near the outside air intake port 17 of this cooling tower A,
The supply header 15 is located near the exhaust port 19.

Each closed heat exchanger B consists of one cooling coil 6o,
The cooling coil 60 is formed by connecting one end of a plurality of mutually parallel bare tubes 60a and one end of a finned fuze 60b in series at a union joint intro 0c in a detachable manner. A plurality of U-shaped curved tubes 62 located on both sides connect the ends of the tubes 61 and form a zigzag meandering passage to be cooled. A pair of separate tube spacers C, supported by C2.

The connection position of the union joint 60C is the bare pipe 60a.
This is an intermediate position where one tube spacer C2 for support and one tube spacer C1 for supporting fin fuze 60b face each other.

Furthermore, the ends of the other tube spacer C2 for supporting the bare tube 60a and the other tube spacer C□ for supporting the fin fuze 60b extend toward each other, and the ends of the tube spacer C2 that support the bare tube 60a and the other tube spacer C□ for supporting the fin fuze 60b extend toward each other. The ends of C-work and C2 are removably connected to each other by a connector 70 such as a bottle. This connection side is opposite to the union jig intro 0c.

An example of the connector 70 includes a socket 71 made of elastic synthetic resin, and an insertion pin 72 made of elastic synthetic resin that can be fitted into and removed from the socket 71 (see FIGS. 4 and 7). (see figure).

Each pipe spacer C, C2 is made of elongated material made of vinyl chloride, and has a U-shaped cross section.The straight pipe 61 located at the left and right ends
The spacers C□ and C2 are set at positions that cover all the joint parts of the curved pipe 62.

Each of the spacers C and C2 is arranged such that a spacer receiver, which will be described later, can be pulled out from the member 63 and replaced.

On the opposing inner surfaces of the pair of left and right cooling tower support frames,
The spacer receiver is made up of a number of channel members each having a U-shaped cross section corresponding to the number of the cooling coils 60, and the members 63 are fixed together at hierarchical intervals. It is arranged in the width direction of the support frame. Each of the spacer receivers of the pair of support frames common to the left and right is provided in the member 63, and each spacer C of the pair of left and right of each cooling coil 60 is placed inside the member 63.
0 and C2 are inserted from the longitudinal direction and supported, and the straight pipes 61 and curved pipes 62 of each cooling coil 6o do not directly contact the support frame, and a predetermined number of cooling coils are arranged vertically and hierarchically in parallel to each other. 60 is installed and supported between a pair of left and right cooling tower support frames via the spacers C1 and C2 (see FIGS. 5 and 6).

At this time, the primary end 64 of the finned tube 60b in all the cooling coils 60 of each stage is on the blower 65 side of the cooling tower A, and the secondary end 66 of the bare tube 60a is on the outside air intake port 17 side. , each connected by a union joint to a common vertical supply and discharge header 15,16.

Furthermore, the cooling coils 6 of the same shape arranged in a hierarchical manner
0 are aligned in the vertical direction, and an eliminator 69 is provided vertically in the vertical direction at an intermediate portion between the bare tube 60a and the finned tube 60b of the heat exchange coil 6o.

The water sprinkling device 10 for the closed type heat exchangers at each stage includes a first water sprinkling section 3 that sprinkles spray water on the finned tubes 60b except in winter.
0, and a second water spraying section 40 that sprays water on the bare pipe 60a throughout the year.

Effects of the Invention In the invention described in each claim that is constructed and operates as described above, the bare tube and the finned tube are supported by mutually independent separate tube spacers with their U-shaped bent tube portions on both sides, and are unified. The pipe spacers on the other side are removably connected to each other with connectors, and are placed in a drawer to the cooling tower machine frame so that they can be replaced. One end is removably connected in series with a joint to form - cooling coils.The finned tube and bare tube are first moved inside the cooling tower, and only the finned tube is pulled out and removed. , bare tubes can be pulled out as needed, and even when multi-stage cooling coils are loaded, the weight of the high-placed closed heat exchanger can be halved, and bare tubes and finned tubes can be easily replaced. Each drawer can be replaced.

Furthermore, even in a multi-cell type in which a large number of cooling towers are arranged in parallel, the heat exchanger can be replaced without any problem.

In the related invention described in claim 2, in addition to the above-mentioned effects, spray water is sprayed only on the bare pipe in winter, and the finned pipe is used as a dry heat exchange unit that heats the air flow that has passed through the bare pipe. It can be used to prevent the generation of white smoke from the exhaust port of a cross-flow cooling tower.

In the invention set forth in claim 4, the eliminator is interposed vertically in the middle of the fin-sealed bare tube of the closed heat exchanger, so that the water droplets of sprayed water that collide with and scatter on the bare tube are prevented. This prevents water droplets from riding on the airflow and reaching the finned tubes, preventing water droplets from adhering to the outer surface of the closed heat exchanger. When passing through the unwetted outer surface of the finned tube, the temperature increases and the relative humidity decreases, making it possible to further prevent the generation of white smoke.

<Effects Unique to the Embodiment> By using the connecting tool 70 consisting of a socket 71 made of elastic synthetic resin and an insertion pin 72 made of elastic synthetic resin that can be fitted into and removed from the socket 71, The ends of the other tube spacer C2 for supporting the bare tube 60a and the other tube spacer C1 for supporting the fin-sealed tube 60b can be connected and separated easily and inexpensively.

[Brief explanation of the drawing]

The drawings relate to this invention: Fig. 1 is a schematic diagram of the first embodiment, Fig. 2 is a plan view of the closed heat exchanger portion of Fig. 1, and Fig. 3 omits the cooling tower support frame. FIG. 4 is an enlarged plan view of the connection part, FIG. 5 is a front view showing the relationship between the bare tube, the spacer and the support frame, and FIG. 6 is the finned tube, the spacer and the support frame. A front view showing the relationship between the support frames and FIG. 7 are enlarged views of the connector. Explanation of main symbols in the diagram B...... Sealed heat exchanger, 60...
......Cooling coil, 60a...Bare tube, 60b...Finned tube.

Claims (1)

[Scope of Claims] 1) A plurality of closed heat exchangers are arranged substantially horizontally under the cooling tower upper sprinkler device in multiple stages vertically and hierarchically, and supply to each closed heat exchanger in each stage. In a cooling tower in which the sections and discharge sections are removably connected to the corresponding common supply header or discharge header, the bare tubes and finned tubes in each stage of the closed heat exchanger are separated into mutually independent pairs. The pipe spacers on one side are supported by the U-shaped bent pipe portions on both sides, and the pipe spacers on one side are connected to each other with connectors in a detachable manner, and the drawers are installed in the cooling tower frame so that the drawers can be replaced. A cooling tower characterized in that one end of the bare tube and one end of the finned tube near the side tube spacer are removably connected in series at a joint to form a single cooling coil. 2) The cooling tower is a cross-flow cooling tower, the supply header is located near the exhaust port of the cooling tower, the discharge header is located near the outside air intake of the cooling tower, and the bare pipes are 2. The cooling tower according to claim 1, wherein the secondary side is detachably attached to the discharge header, and the primary side of the finned tube is detachably attached to the supply header. 3) The cooling tower according to claim 2, characterized in that an eliminator is disposed vertically at an intermediate portion between the finned tube and the bare tube.