JPH0490497A - Cooling tower - Google Patents

Abstract

PURPOSE:To enable a bare pipe and a finned pipe to be easily pulled out and replaced with a new pipe by a method wherein the bare pipe and the finned pipe are removably connected with a union joint and supported by separate pipe spacers at their both U-shaped bent portions and each of the pipe spacers is disposed independently with respect to a frame of a cooling tower in such a way as it can be freely replaced. CONSTITUTION:A closed type heat exchanger B is comprised of a cooling coil 60. The cooling coil 60 is made such that a plurality of parallel bare pipes 60a and finned pipes 60b are removably connected by a union joint 60c in series. End portions of each of the bare pipes 60a and the finned pipes 60b at a straight pipe 61 are connected. A plurality of U-shaped bent pipes 62 forming a zig-zag formed cooled passage are supported by a pair of right and left separate pipe spacers C1 and C2 which are relatively independent from each other and fitted to the straight pipe 61. Each of the spacers C1 and C2 is disposed with respect to a spacer receiving member 63 in such a way as it can be pulled out and replaced to it.

Description

DETAILED DESCRIPTION OF THE INVENTION A.Objective of the invention (Industrial field of application) This invention is a method of arranging a plurality of closed heat exchangers almost horizontally in a cooling tower main body in a vertically hierarchical manner. 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.
Disclosed in Publication No. 764 (Problem to be Solved by the Invention) The heat exchanger in the cooling tower described in the aforementioned publication is installed and used in multiple stages within the main body of the cooling tower. Connect finned tubes in series! Because the structure is such that the side frame is integrated into the cooling tower, when replacing it, the heavy heat exchanger for each stage, that is, one cooling coil, must be extended into the cooling tower together with the side frame. First, the height and width of modern large cooling towers have increased, and removing the heat exchanger located at a high place is a difficult task in a narrow cooling tower, and can lead to falling accidents. It is also the cause.

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

Configuration of the Invention (Means for Solving the Problems) In order to solve the above problems, the present invention provides a system in which a plurality of nearly horizontal closed heat exchangers are installed under the cooling tower upper sprinkler system, and the upper and lower floors are connected to each other. In a cooling tower, the cooling tower is arranged in multiple stages, and the supply section and discharge section of each closed heat exchanger in each stage are removably connected to a corresponding common supply header or discharge header.

Each stage of hermetic heat exchanger consists of a cooling coil in which bare tubes and finned tubes are removably connected in series at a joint. The cooling tower is supported by a U-shaped bent pipe section, and each pipe spacer is independently drawn out and replaced with respect to the cooling tower machine frame.The cooling tower is a cross-flow type cooling tower, and the supply header is located near the exhaust port of this cooling tower, the discharge header is located near the outside air intake of the cooling tower, the secondary side of the bare pipe is the lug to the discharge, and the primary side of the finned pipe is the supply Preferably, they are each removably attached to the header.

The cooling tower may be a countercurrent cooling tower.

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 spray water, cools the spray water due to the latent heat effect of vaporization, slightly rises in temperature, and then passes through the bare pipe. In a finned tube without a finned tube, the circulating cooling water, which is still at a high temperature, is sent from the load section through the supply header into the finned tube, and the air that has passed indirectly around the outside of the bare tube comes into contact with it and heats up. be done.

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 as set forth in claim 4, the eliminator is disposed vertically between the bare pipe and the finned pipe, so that during winter operation, the water sprayed onto the bare pipe collides with the surface of the bare pipe. 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. , and then remove the pipe spacers that support the finned tubes and bare tubes from the cooling tower body as appropriate. , remove adhering dust, sand, etc., and repair damage or replace with a new one.

Next, the function of the countercurrent type cooling tower according to claim 3 is the same as that of a known closed type countercurrent type cooling tower, and the repair method thereof is performed in the same manner as in the above-mentioned specific invention.

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

1st Embodiment (Representative Embodiment of the Invention Recited in Claims 1, 2, and 4) In FIG. , a plurality of closed heat exchangers B are arranged vertically and hierarchically in a substantially horizontal manner, and the supply section and discharge section of each closed heat exchanger B are attached to and detached from the corresponding common supply header 15 or discharge header 16, respectively. The discharge header 16 is located near the outside air intake port 17 of the cooling tower A,
The supply header is located near the exhaust port 19.

The closed heat exchanger B consists of a cooling coil 60, which includes a plurality of mutually parallel bare tubes 60a and finned tubes 60.
b are detachably connected in series with a union joint 60c: straight pipes 6 of each bare pipe 60a and finned pipe 60b
A plurality of U-shaped curved tubes 62 that connect one end to form a cooled passage that meander in a zigzag manner are supported by a pair of left and right independent tube spacers C□, C2 that fit into the straight tube 61. ing.

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.

The spacer receivers of the spacers C□ and C2, which will be described later, are drawn out from the member 63 and arranged so that they can be 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, and the members 63 are horizontally connected to each other in each spacer receiver. It is arranged in the width direction of the support frame. Each of the spacer receivers of the pair of left and right support frames is provided in the member 63, and each of the spacer receivers of the pair of left and right of each cooling coil 60 is inserted into the member 63.
2 is supported from its longitudinal direction, and the straight tube 61 and curved tube 62 of each cooling coil 60 do not directly contact the support frame, and a predetermined number of cooling coils 6 are arranged vertically and hierarchically in parallel to each other.
0 is the spacer C between the pair of left and right cooling tower support frames.
1. It is supported by construction via C2 (see Fig. 3).

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 60 (see FIG. 2).

The water sprinkling device 10 for each stage of the closed heat exchanger B includes a first water sprinkling section 30 that sprinkles spray water onto the finned tube 60b except in winter, and a first water sprinkling section 30 that sprays spray water through a formula through the bare pipe 60a. It consists of two water sprinkling parts 40.

The operation of the embodiment is the same as that of each of the inventions described in the second and fourth specific invention claims, so a description thereof will be omitted here.

Second Embodiment (Typical Embodiment of the Invention Recited in Claim 3) A in FIG. Unlike the first embodiment, this is a counter-current type cooling tower, and a spraying device 50 is installed between the outside air intake port and the upper exhaust port of the counter-current type cooling tower to spray water in a counter-current manner to the air flow.
Closed heat exchangers B are arranged in multiple stages.

The structure of this heat exchanger B is the same as that of the first embodiment.

Other components having the same reference numerals as those in the first embodiment have the same configurations and functions as those in the first embodiment.

Since its operation is the same as that in claim 3, the explanation here will be omitted.

C0 Effect of the Invention In the invention described in each claim configured and operated as described above, the bare tube and the finned tube are detachably connected by a union joint, and the bare tube and the finned tube are separately connected. The U-shaped bent portions on both sides are supported by pipe spacers, and each pipe spacer is independently drawn out from the cooling tower machine frame and placed so that they can be replaced, allowing either finned pipes or bare pipes to be installed depending on the damage location. , or both can be independently taken out of the cooling tower body with pipe spacers.
In the separated state, the bare tube and the finned tube can be easily pulled out and replaced.

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

In the invention as set forth in claim 4, the eliminator is vertically interposed between the finned tube and the bare tube of the closed heat exchanger, so that water droplets of sprayed water that collide with the bare tube and are scattered are removed. This prevents water droplets from adhering to the outer surface of the closed heat exchanger, and allows air that has been cooled by the bare tubes and has a high relative humidity to be transferred to the outer surface of the heat exchanger. When passing through the outer circumferential surface of the finned tube that is not wet with water, the temperature increases and the relative humidity is reduced, making it possible to further prevent the generation of white smoke.

[Brief explanation of drawings]

The figures relate to the present invention, and FIG. 1 is a schematic diagram of the first embodiment, FIG. 2 is a plan view showing the closed heat exchanger attached to the cooling tower support frame, and FIG. 3 is a schematic diagram of the first embodiment. FIG. 2 is a front view of the spacer portion, FIG. 4 is a schematic diagram of the second embodiment, FIG. 5 is a plan view of the finned tube in this heat exchanger, and FIG.
The figure is a partially enlarged front view of FIG. 5. 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 section and discharge section are removably connected to the corresponding common supply header or discharge header, the closed heat exchanger at each stage consists of bare tubes and finned tubes that are removably connected in series with a joint. The bare tube and the finned tube are supported by mutually independent separate tube spacers with U-shaped bent tube portions on both sides, and each tube spacer is supported independently with respect to the cooling tower frame. A cooling tower with drawers that can be replaced freely. 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 1, wherein the cooling tower is a countercurrent type cooling tower. 4) The cooling tower according to claim 2, characterized in that an eliminator is vertically disposed between the finned tube and the bare tube.