JP2905933B2 - 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 Object of the Invention <Industrial application field> The present invention relates to a plurality of hermetically sealed heat exchangers,
The present invention relates to a cooling tower which is arranged in a cooling tower main body in an upper and lower hierarchy, and a supply section and a discharge section of each closed type heat exchanger are connected to a corresponding common supply header or discharge header, respectively.

<Prior Art> Various types of this type of cooling tower have been developed in the market before the filing of this application.
No., published in Japanese Patent Application Publication No.

<Problems to be Solved by the Invention> The heat exchanger in the cooling tower described in the above publication is used by being incorporated in multiple stages in the cooling tower main body, and a naked pipe and a finned pipe of the cooling coil are installed in series, Because the side frame is of a structure that is integrated, at the time of replacement, a heavy heat exchanger for each stage, that is, one cooling coil together with the side frame,
It has to be drawn out inside the cooling tower, and in recent large cooling towers, their height and width have become large. It is troublesome and causes a fall accident.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling tower which overcomes the drawbacks of the prior art and makes it possible to easily assemble and replace a heat exchanger.

B. Configuration of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a plurality of hermetically sealed heat exchangers under a cooling tower upper water sprinkler, which are substantially horizontal, In a cooling tower which is arranged in multiple stages and the supply section and the discharge section of each closed type heat exchanger of each stage are detachably connected to the corresponding common supply header or discharge header, respectively, the closed type heat exchange of each stage The vessel consists of a cooling coil in which a bare pipe and a finned pipe are connected in a detachable manner in series with a johnt, and the bare pipe and the finned pipe are supported on separate pipe spacers independent of each other with U-shaped curved pipe sections on both sides. Each of the pipe spacers is a cooling tower which is independently drawn out and exchangeable with respect to the cooling tower frame.

The cooling tower is a crossflow 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,
It is preferable that the secondary side of the bare tube is detachably attached to the discharge header, and the primary side of the finned tube is detachably attached to the supply header.

The cooling tower may be a countercurrent cooling tower.

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

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

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

Therefore, the air immediately after being taken in from the outside air intake comes into direct contact with the spray water, cools the spray water by the latent heat of vaporization, raises its temperature slightly, and passes through the bare pipe. Next, in the finned pipe where spray water is not sprayed, the outside circumference of the bare pipe is indirectly combined with the still high temperature circulating cooling water sent from the load section through the supply header into the finned pipe. The air that has passed comes into contact and is heated.

Due to this heating, the air becomes high temperature and is sucked toward the exhaust port with its relative humidity reduced, and is exhausted to the atmosphere without becoming supersaturated air, that is, without becoming white smoke.

According to the fourth aspect of the present invention, the eliminator is disposed vertically in an intermediate portion between the bare pipe and the finned pipe, so that water sprayed on the bare pipe collides with the surface of the bare pipe during winter operation. The eliminator catches water droplets that are scattered and ride on the air flow handled from the outside air inlet and flow toward the exhaust port side, and in the finned pipe, the water droplets do not adhere to the outer peripheral surface of the finned pipe and the temperature of the air is raised. .

When taking out this heat exchanger from the cooling tower body due to periodic cleaning of the cooling tower and damage to the closed type heat exchanger,
Disconnect the common supply header, discharge header and the finned and bare tubes of the heat exchanger, and then remove the joint connecting the finned and bare tubes.

In this state, the finned tube and the tube spacer supporting the bare tube are independently removed from the cooling tower body as appropriate, and the attached dust,
Remove sand, etc. and fix damage or replace with new one.

Next, the operation of the counter-current cooling tower according to claim 3 is the same as that of a known closed-type counter-current cooling tower, and the repair method is performed in the same manner as the specific invention.

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

<First Embodiment> (Representative Embodiment of Claims 1, 2, and 4) In FIG. 1, A is a cross-flow type cooling tower. A plurality of hermetically sealed heat exchangers B
The supply and discharge sections of each hermetic heat exchanger B are removably connected to a corresponding common supply header 15 or discharge header 16, respectively.
Numeral 16 is located near the outside air inlet 17 of the cooling tower A, and the supply header is arranged near the exhaust port 19.

The sealed exchanger B is composed of a cooling coil 60,
Numeral 60 comprises a plurality of mutually parallel bare tubes 60a and finned tubes 60b detachably connected in series by a union joint 60c. A plurality of U-shaped curved tubes 62 forming a passage to be cooled meandering are supported by a pair of left and right independent tube spacers C ₁ and C ₂ fitted into the straight tube 61.

Each of the pipe spacers C ₁ and C ₂ is made of a slender material made of vinyl chloride, has a U-shaped cross section, and has a spacer at a position covering all the joints of the straight pipe 61 and the curved pipe 62 located at the left and right ends.
C ₁ and C ₂ are set.

Each of the spacers C ₁ and C ₂ is a spacer receiving member 63 described later.
It is arranged to be freely exchangeable.

On opposite inner surfaces of the pair of left and right cooling tower support frames D, a number of spacer receiving members 63 composed of channel members having a U-shaped cross section corresponding to the number of the cooling coils 60 are integrally formed at hierarchical intervals. Fixed and each spacer receiving member
Reference numeral 63 is disposed substantially horizontally in the width direction of each support frame D.
In each spacer receiving member 63 of the pair of left and right support frames D,
A pair of left and right spacers C ₁ and C ₂ of each cooling coil 60 are supported from the longitudinal direction, and a straight pipe 61 and a curved pipe of each cooling coil 60 are provided.
A predetermined number of cooling coils 60 are installed between the pair of left and right cooling tower support frames D via the spacers C ₁ and C ₂ between the pair of left and right cooling tower support frames D without the 62 being in direct contact with the support frame D. Supported (see FIG. 3).

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

Furthermore, the cooling coils of the same shape arranged in a hierarchical manner
60 are aligned in the vertical direction, and the bare tube 60 of this heat exchange coil 60
a and an eliminator 69 in the middle of the finned tube 60b,
It is provided vertically over the vertical direction (see FIG. 2).

The water sprinkling device 10 for each stage of the hermetic heat exchanger B is provided with a first water sprinkling section 30 for sprinkling spray water to the finned pipe 60b except in winter.
And a second sprinkling section 40 for sprinkling spray water through the bare pipe 60a.
It consists of

The operation of the above embodiment is the same as that of each of the second and fourth aspects of the specific invention, so that the description is omitted here.

<Second Embodiment> (Representative embodiment of the invention as set forth in claim 3) In FIG. 4, _A0 is a countercurrent cooling tower unlike the first embodiment. _Between the outside air intake port ₀ and the upper exhaust port, the closed type heat exchanger B for spraying the spray water from the spray device 50 in a countercurrent manner with the air flow is arranged in multiple stages.

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

In addition, components having the same reference numerals as those in the first embodiment have the same configuration and operation as those in the first embodiment.

Since the operation is the same as that of the third aspect, the description is omitted here.

C. According to the present invention, the bare tube and the finned tube are detachably connected by a union joint, and the bare tube and the finned tube are separated by separate tube spacers. , And each tube spacer is independently drawn out and replaced with respect to the cooling tower frame, so that one or both of a finned tube and a bare tube are provided depending on the damaged part. Can be independently taken out of the cooling tower main body together with the tube spacers, and even when the cooling coils are loaded in a multi-stage manner, the closed heat exchanger at a high place is divided into two parts, and the bare pipes and fins are lightly lighted. Each tube can be pulled out and replaced.

In the related invention according to claim 2, in addition to the above-mentioned effects, a finned pipe is used as a dry heat exchange section for spraying spray water only to the bare pipe in winter and heating the air flow passing through the bare pipe. Can be used to prevent the generation of white smoke from the exhaust port of the cross-flow cooling tower.

In the invention according to claim 4, the eliminator is vertically interposed between the finned tube and the bare tube of the closed type heat exchanger, so that water droplets of spray water colliding with the bare tube and scattered. Can be prevented from getting on the air flow and reaching the finned tube.No water droplets adhere to the outer peripheral surface of the sealed heat exchanger. When passing through the outer surface of a finned pipe that is not wet with water, the temperature rises, the relative humidity is reduced, and the generation of white smoke can be further prevented.

[Brief description of the drawings]

1 is a schematic view of a first embodiment, FIG. 2 is a plan view showing a state in which a closed heat exchanger is mounted on a cooling tower support frame, and FIG. FIG. 4 is a front view of the spacer portion of FIG. 2, FIG. 4 is a schematic view of the second embodiment, FIG. 5 is a plan view of a finned tube in this heat exchanger, and FIG.
The figure is a partially enlarged front view of FIG. Explanation of main symbols in the figure B: Sealed heat exchanger, 60: Cooling coil, 60a: Bare tube, 60b: Tube with fins

Claims (4)

(57) [Claims] 1. A plurality of hermetically sealed heat exchangers are arranged horizontally in a lower part of a cooling tower upper water sprinkler, and are arranged in a plurality of stages in an upper and lower hierarchy. In the cooling tower in which each section is detachably connected to a corresponding common supply header or discharge header, the closed type heat exchanger of each stage is configured such that a bare pipe and a finned pipe are detachably connected in series with Jont. Consisting of a cooling coil, the bare pipe and the finned pipe are supported by independent pipe spacers on both sides of the U-shaped bent pipe section, and each pipe spacer can be drawn out and exchanged independently with the cooling tower frame. Cooling towers located in 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, the secondary side of the bare tube is detachably attached to the discharge header, and the primary side of the finned tube is detachably attached to the supply header. The cooling tower according to claim 1, wherein 3. The cooling tower according to claim 1, wherein said cooling tower is a countercurrent cooling tower. 4. The cooling tower according to claim 2, wherein an eliminator is vertically arranged at an intermediate portion between the finned pipe and the bare pipe.