CN103344135A - Plate type evaporative condenser - Google Patents

Abstract

The invention discloses a plate type evaporative condenser. At least two guide partition plates with the wind guiding functions are arranged under a water stopping plate (17), groups of tube plates serving as plate type radiators are arranged between two adjacent guide partition plates and in a casing cavity under the lowest guide partition plate, each tube plate set is composed of a plurality of tube plate bunches (16) which are vertically arranged side by side and are in parallel connection, tube plate bunches of the adjacent tube plate sets are mutually connected to form a channel for media to be condensed, an inlet for media to be condensed is formed in the upper end of the uppermost tube plate set, an outlet for media to be condensed is formed at the lower end of the lowest tube plate set, an air inlet (4) is formed in the lateral side of the lowest tube plate set, and groups of spray header sets are respectively arranged on the lateral sides of the tube plate sets. The plate type evaporative condenser combines advantages of reverse-flow evaporative condensation and fair-flow evaporative condensation and has higher heat exchange efficiency.

Description

Plate evaporative condenser

technical field

The invention relates to an evaporative condenser, in particular to a plate evaporative condenser. the

Background technique

In the existing plate-type evaporative condenser, a group of plate-shell radiators are installed in the shell, and circulating cooling water is sprayed upward or downward, and the cooling water evaporates on the surface of the radiator, and the evaporated water vapor is taken away by the axial flow fan In this way, the heat energy of the tube-side medium of the radiator flowing from top to bottom is taken away, and the purpose of condensing the tube-side medium is achieved. According to the relationship between the wind direction in the housing and the water spray direction, it can be divided into two types: counter-flow type and downstream type. Among them, the counterflow type has a small gap between the cooling plates, the wind brings the water up and affects the water running down, and it needs to set up a large enough space on the upper part of the evaporative cooling to block the water, and the heat transfer effect is not good. In the existing down-flow evaporative cooling, the flow direction of wind and water is from bottom to top, which is opposite to the flow direction of the tube-side medium, which affects the heat exchange efficiency. the

Contents of the invention

The technical problem to be solved by the present invention is to provide a plate-type evaporative condenser, which combines the advantages of counter-current and forward-flow evaporative cooling, and has higher heat exchange efficiency, so as to overcome the poor evaporation effect of the existing counter-current and forward-current evaporative cooling. Defects. the

Technical scheme of the present invention is as follows:

A plate-type evaporative condenser, including a shell and a water collection tank, an axial flow fan is installed on the upper end of the shell, and a water baffle is installed inside the shell. The guide partition for the wind effect, the root of the guide partition is connected with the inner wall of the shell, and there is a wind-shui deflection opening between the suspended end of the guide partition and the inner wall of the shell; the wind-shui deflection port of two adjacent guide partitions They are respectively located on opposite sides of the housing; a set of tube-sheet groups as plate radiators are respectively arranged between two adjacent guide partitions and in the housing cavity below the lowest guide partition, and each tube-sheet group is respectively It is formed by parallel connection of several tubesheet bundles arranged vertically; the tubesheet bundles of adjacent tubesheet groups are connected to each other to form the condensed medium channel; the condensed medium inlet is set at the upper end of the uppermost tubesheet group, and the outlet is set at the bottom The lower end of the tube plate group; the shell also has an air inlet located on the side of the bottom tube plate group; a group of spray water pipe groups are respectively installed on the side of each tube plate group, and the spray water pipe groups are respectively described in the sump connected.

The positions of the air inlet, spray water pipe group and guide partition are designed to meet the following conditions: the water spray direction of each spray water pipe group is consistent with the wind flow direction, and the water and steam are deflected when passing through the wind and water diversion opening. the

Preferably, the tubesheet bundles of the adjacent upper and lower tubesheet groups are connected through headers. the

The positive effect of the present invention is:

First, the inner cavity of the shell is divided into at least two evaporation areas with different temperatures by the guide partition. The temperature of the upper evaporation area is higher than that of the lower evaporation area, and the temperature of the exhaust end is higher than that of the air intake end. There is a lot of heat, and the lower side enters the wind and the upper end exits the wind. The spraying direction of each group is consistent with the wind direction. The spraying water can form a film on the surface of the tube plate group under the upward wind shear force and downward gravity. The cloth film is more uniform and it is easier to vaporize the water. The present invention integrates the advantages of the counter-flow type and the down-flow type evaporative cooling while overcoming their shortcomings, and has better evaporation efficiency.

Second, with the operation from top to bottom, the phase change (condensation) of the condensed medium occurs, and the volume gradually shrinks. The present invention divides the inner cavity of the shell into different chambers through the guide partition, and can control different tubes according to the phase change characteristics of the medium. The number of tubesheet bundles in the plate group is adjusted so that the number of tubesheet bundles in the lower tubesheet group is smaller than that in the upper tubesheet group, which increases the flow rate of the condensed medium, increases the circulation frequency of the medium, and further improves the heat exchange efficiency. the

Description of drawings

Fig. 1 is a schematic diagram of the structure and working principle of an embodiment of the present invention. the

Fig. 2 is a schematic diagram of the lateral shape and structure of a tube-sheet group according to an embodiment of the present invention. the

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and examples.

As shown in Fig. 1 , this embodiment includes a casing 5, an axial flow fan 10 is installed on the upper end of the casing 5, a water collection tank 14 is installed on the lower end, and a water baffle 17 is installed inside. The lower guide partition 7 and the upper guide partition 9 with wind guiding effect are installed between the water retaining plate 17 and the sump 14 in the housing 5, and the roots of the lower guide partition 7 and the upper guide partition 9 are connected with the shell. The inner wall is connected, and there is a feng shui deflection opening between the suspension end and the inner wall of the housing; the feng shui deflecting openings of the lower guide partition 7 and the upper guide partition 9 are respectively located on the opposite left and right sides of the housing. the

The lower guide baffle 7 and the upper guide baffle 9 divide the inner chamber of the housing into three zones of steam-water separation, high-temperature evaporation and low-temperature evaporation. the

The upper tube sheet group 8 between the lower guide partition 7 and the upper guide partition 9 is respectively installed in the shell cavity, and the lower tube sheet group 6 below the lower guide partition 7 is also installed, and each tube sheet group They are respectively formed by parallel connection of several tube-sheet bundles 16 arranged side by side, as shown in FIG. 2 . The tubesheet bundles of the upper tubesheet group 8 and the lower tubesheet group 6 are connected in series to form a condensed medium channel. The tube-side medium inlet as the fluid to be condensed is arranged at the upper end of the upper tube sheet group 8 , and the outlet is arranged at the lower end of the lower tube sheet group 6 . the

The specific connection methods between the upper and lower tubesheet bundles include: the tubesheet bundles of the upper tubesheet group 8 are respectively connected to the headers 11, and the tubesheet bundles of the lower tubesheet group 6 are also respectively connected to the headers 11. the

The casing 5 also has an air inlet 4 positioned on the side of the lower tube plate group 6 , and the air inlet 4 is located on the same side of the casing as the wind and water deflection opening of the upper guide partition 9 and below the lower guide partition 7 . The first spray water pipe group 3 is installed inside the air inlet 4, and the second spray water pipe group 12 is installed on the side of the upper tube plate group 8, and the second spray water pipe group 12 is located on the opposite side of the first spray water pipe group 3. the upper part of the side. the

The sump 14 is connected to the first spray water pipe group 3 through the first water pump 1 and the first circulating water pipe 2 , and the sump 14 is also connected to the second spray water pipe group 12 through the second water pump 15 and the second circulating water pipe 13 . the

When the above embodiment is used, under the action of the water pump, the first spray water pipe group 3 and the second spray water pipe group 12 spray cooling water to the lower tube plate group 6 and the upper tube plate group 8 respectively along the sides of the tube plate bundle. At the same time, under the action of the axial flow fan 10, the wind first enters the low-temperature evaporation area from the air inlet 4, and takes away the water vapor evaporated from the lower tube plate group 6. The evaporation zone takes away the water vapor evaporated from the upper tube plate group 8, and then enters the steam-water separation zone through the air-water deflection port of the upper guide partition 9, where the water falls and falls, and the steam is drawn out of the system from the upper end of the shell. Realize the condensation of the medium flowing through the tube sheet group. the

If three guide partitions are installed between the water retaining plate 17 and the sump 14 in the shell 5, correspondingly, three sets of upper, middle and lower tube-sheet groups in which the upper and lower tube-sheet bundles are connected in series should be set, each One side of the tube plate group is provided with a set of spray water pipe groups connected with the sump 14 . The bottom tube plate group corresponds to the air inlet 4, ensuring that the water spray direction is consistent with the wind flow direction, and the water and steam are deflected and run when passing through the wind and water diversion opening. The structure to ensure the deflection operation of water and steam when passing through the Fengshui diversion opening is: the Fengshui diversion openings of the two adjacent guiding partitions are located on opposite sides, and the Fengshui diversion opening of the bottom guiding partition is located opposite to the air inlet 4. side. the

The sump 14 can also be arranged outside the housing 5 . the

Claims (3)

1. A plate type evaporative condenser, including a shell (5) and a water collection tank (14), an axial flow fan (10) is installed on the upper end of the shell (5), and a water baffle is installed inside the shell (5) (17), characterized in that: At least two guide partitions with wind guiding function are installed under the water baffle (17), the roots of the guide partitions are connected with the inner wall of the housing, and the suspended ends of the guide partitions are connected to the shell There is a feng shui deflection opening between the inner wall; the feng shui deflection openings of the two adjacent guide partitions are respectively located on the opposite sides of the housing; A group of tube-sheet groups as plate radiators are arranged in the cavity of the shell, and each tube-sheet group is formed by parallel connection of several tube-sheet bundles (16) arranged vertically in parallel; the tube-sheet bundles of adjacent tube-sheet groups are mutually connected. The connection forms the channel of the condensed medium; the inlet of the condensed medium is set at the upper end of the uppermost tube sheet group, and the outlet is set at the lower end of the lowermost tube sheet group; the shell (5) also has an air inlet located on the side of the lowermost tube sheet group (4); A group of spraying water pipes is respectively installed on the side of each tube plate group, and the spraying water pipes are respectively connected to the sump (14). 2. The plate-type evaporative condenser according to claim 1, characterized in that: the position design of the air inlet (4), the spray water pipe group, and the guide partition (7) satisfies the following conditions: each group of spray water pipe groups The water spraying direction of the utility model is consistent with the wind flow direction, and the water and steam are deflected and run when passing through the wind and water diversion opening. 3. The plate-type evaporative condenser according to claim 1 or 2, characterized in that: the tube-sheet bundles of the adjacent upper and lower tube-sheet groups are connected by headers.

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