Transverse flow cooling tower filler resistance testing system

Abstract

The utility model discloses a transverse flow cooling tower filler resistance test system, which belongs to the technical field of cooling towers and comprises an inlet module, a spray filler module, an observation module, an overhaul / transition module, an upstream flow equalizing module, a nozzle module, a downstream flow equalizing module and a fan module which are sequentially connected. Universal wheels are mounted at the bottom of each module, so that moving and mounting are facilitated; the inlet module is of an empty cylinder structure and forms an air inlet. A filler is arranged in the spraying filler module, and a water sprinkling basin is arranged above the filler; a pressure measuring tube and a transparent window are arranged in the observation module; the maintenance / transition module is of an empty cylinder structure; the upstream flow equalizing module and the downstream flow equalizing module are of hollow cylinder structures; the nozzle module is of an empty cylinder structure, a partition plate is arranged in an empty cylinder, and nozzles capable of being opened and closed are distributed on the partition plate. And a fan is arranged in the fan module. The utility model is used for solving the problems in the background technology. The device is an experimental device for measuring the relationship among the wind resistance of the filler, the wind speed, the spraying density and the filler depth.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling towers, in particular to a cross-flow cooling tower filler resistance testing system. Background Art

[0002] In the past, the relevant factors of the wind resistance of the crossflow tower packing were generally measured using fluid mechanics experimental equipment. By simulating actual working conditions, the changes in the wind resistance of the packing under different spray densities and wind speeds were measured. The experimental operation was inconvenient and the cost was high. Therefore, it is necessary to design a detection device to measure the relationship between the wind resistance of the packing and the wind speed, spray density and the depth of the packing. Utility Model Content

[0003] In view of the above problems, the utility model provides a cross-flow cooling tower filler resistance testing system for solving the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A cross-flow cooling tower packing resistance test system comprises an inlet module, a spray packing module, an observation module, an inspection / transition module, an upstream flow equalizing module, a nozzle module, a downstream flow equalizing module, and a fan module which are connected in sequence; the inlet module is an empty cylinder structure, constituting an air inlet; the spray packing module is provided with packing, and a water basin is provided above the packing; the observation module is provided with a pressure measuring tube and a transparent window; the inspection / transition module is an empty cylinder structure; the upstream flow equalizing module and the downstream flow equalizing module are empty cylinder structures; the nozzle module is an empty cylinder structure, a partition is provided in the empty cylinder, and nozzles which can be opened and closed are distributed on the partition; a fan is provided in the fan module.

[0006] As a further improvement of the above solution, a rain shield is provided in the observation module, and the rain shield is located above the pressure measuring tube.

[0007] As a further improvement of the above solution, the nozzle is trumpet-shaped, and the diameter of the air inlet end is smaller than the diameter of the air outlet end.

[0008] As a further improvement of the above scheme, the spray filling module includes a tower body, one side of the tower body is connected to the inlet module, and the other opposite side is connected to the observation module; a filler is arranged in the tower body, a water broadcasting basin is arranged above the filler, and a water collecting basin is arranged below; a circulation pipe is connected between the water collecting basin and the water broadcasting basin, and a water pump and an electromagnetic flowmeter are arranged on the circulation pipe.

[0009] As a further improvement of the above solution, the spray filler module is detachably connected to the inlet module and the inspection / transition module; the spray filler module is provided with a variety of models according to different filler depths.

[0010] As a further improvement of the above solution, universal wheels are installed at the bottom of each module.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] This system is used to measure the relationship between the wind resistance of the packing and the wind speed, spray density, and packing depth. It can change the pressure difference before and after the non-nozzle wall by adjusting the frequency of the fan module. The pressure difference can be obtained by measuring the two points before and after the nozzle wall with a pressure gauge. The wind speed at the nozzle wall can be obtained by looking up the pressure difference before and after the nozzle wall. The wind speed is approximately equal to the wind speed at the packing. Knowing the cross-sectional area of ​​the packing, the air volume at the packing can be obtained. The pressure difference between the two points before and after the packing is measured with a pressure gauge to obtain the pressure difference before and after the packing. The spray packing module 1, spray packing module 2, and spray packing module 3 with different packing depths are used for measurement. The corresponding wind resistance of the packing in each case can be obtained by using the formula wind resistance = pressure difference / (air volume*packing depth). The spray density at the packing is changed by adjusting the flow of the water pump. The spray density is obtained by the display value of the electromagnetic flowmeter. The spray density corresponds to the degree of water wetness of the spray packing module. After multiple tests, the wind resistance of the packing under different spray densities is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the cross-flow cooling tower filler resistance test device.

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the device.

[0015] Figure 3 It is a schematic diagram of the spray filler module structure.

[0016] Figure 4 This is a schematic diagram of the structure of the spray filler module one.

[0017] In the figure: 1-inlet module; 2-spray filler module; 3-observation module; 4-maintenance / transition module; 5-upstream flow equalization module; 6-nozzle module; 7-downstream flow equalization module; 8-fan module; 21-spray filler module one; 22-spray filler module two; 23-spray filler module three; 211-water pump; 212-electromagnetic flowmeter. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution, the utility model is described in detail below in conjunction with embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0019] like Figure 1-4As shown, the specific scheme of this embodiment is: a cross-flow cooling tower packing resistance test system, including an inlet module 1, a spray packing module 2, an observation module 3, a maintenance / transition module 4, an upstream flow equalization module 5, a nozzle module 6, a downstream flow equalization module 7, and a fan module 8 connected in sequence; universal wheels are installed at the bottom of each module for easy movement and installation; the inlet module 1 is an empty cylinder structure, forming an air inlet; the spray packing module 2 is provided with a packing, and a water basin is provided above the packing; a pressure measuring tube and a transparent window are provided in the observation module 3; the maintenance / transition module 4 is an empty cylinder structure; the upstream flow equalization module 5 and the downstream flow equalization module 7 are empty cylinder structures for making the air pressure more uniform; the nozzle module 6 is an empty cylinder structure, and a partition is provided in the empty cylinder, and nozzles that can be opened and closed are distributed on the partition; the nozzle module 6 is used to adjust the air pressure and wind position; and a fan is provided in the fan module 8. Among them, the switch of the nozzle can be simply blocked by artificially using a blockage to block part of the nozzle in advance according to the test needs. The pressure measuring tube is used to measure the internal wind pressure; the transparent window is convenient for staff to observe.

[0020] As a preferred embodiment of the above embodiment, a rain shield is provided in the observation module 3, and the rain shield is located above the pressure measuring tube. The rain shield is used to shield the pressure measuring tube from above to prevent the impact of water drops from affecting the detection results.

[0021] As a preferred embodiment of the above embodiment, the nozzle is trumpet-shaped, and the diameter of the air inlet end is smaller than the diameter of the air outlet end.

[0022] As a preferred embodiment of the above embodiment, the spray filling module 2 includes a tower body, one side of the tower body is connected to the inlet module 1, and the other side opposite to the observation module 3; a filler is arranged in the tower body, a water broadcasting basin is arranged above the filler, and a water collecting basin is arranged below; a circulation pipe is connected between the water collecting basin and the water broadcasting basin, and a water pump 211 and an electromagnetic flowmeter 212 are arranged on the circulation pipe.

[0023] As a preferred embodiment of the above embodiment, the spray packing module 2 is connected with the inlet module 1 and the maintenance / transition module 4 by bolts to form a detachable structure; the spray packing module 2 is provided with three models, namely, spray packing module one 21, spray packing module two 22, and spray packing module three 23.

[0024] The cross-flow cooling tower filler resistance testing device is mainly composed of an inlet module 1, a spray filler module 2, an observation module 3, a maintenance / transition module 4, an upstream flow equalization module 5, a nozzle module 6, a downstream flow equalization module 7, and a fan module 8.

[0025] This device is mainly used to measure the relationship between the wind resistance of the packing and the wind speed, spray density, and packing depth. Before the formal operation, the effectiveness test of the flow equalization device must be carried out: first arrange the spray packing module 21 with the largest resistance to be installed first, turn on the fan, gradually increase the speed, observe the reading of the pressure gauge before and after the nozzle at this time, so that the pressure difference before and after the nozzle wall reaches more than 400Pa, and use the wind tunnel to measure the wind speed at 225mm downstream of the flow equalization device and the center of the 2x2m section to ensure that it is less than 2m / s, and record the data of the speed measurement at 3x3=9 points of the section to ensure that the average wind speed does not deviate too much from the maximum speed. Perform a circular four-point pressure measurement calibration on the three measured points: take the average value respectively to ensure that there is no backflow in the downstream position. For different nozzle arrangements and nozzle opening and closing states, repeat the wind tunnel calibration test to ensure that the test results are relatively accurate. Use a wind tunnel to measure the wind speed after the packing and compare it with the nozzle measured air volume.

[0026] According to the target air volume, check the flow measurement calculation table to get the number of nozzles and operate the nozzles to open. The positions of the opened nozzles should be as symmetrical as possible. By measuring the pressure difference before and after the nozzle wall to reach the expected value, the corresponding expected wind speed can be obtained by checking the pressure difference and wind speed correspondence table. The wind speed at the nozzle partition is approximately equal to the wind speed at the packing, and the air volume at the packing can be obtained. Then measure the pressure difference before and after the packing, and use the formula wind resistance = pressure difference / (air volume*packing depth) to get the corresponding packing wind resistance in each case. The wind resistance of the packing is measured by adjusting different wind speeds, spray densities and packing depths.

[0027] Working principle of the system: The system is used to measure the relationship between the wind resistance of the packing and the wind speed, spray density, and packing depth. It changes the pressure difference before and after the nozzle wall by adjusting the frequency of the fan module 8. The pressure difference can be obtained by measuring the two points before and after the nozzle wall with a pressure gauge. The wind speed at the nozzle wall can be obtained by looking up the pressure difference before and after the nozzle wall. The wind speed is approximately equal to the wind speed at the packing. The cross-sectional area of ​​the packing is known, and the air volume at the packing can be obtained. The pressure difference between the two points before and after the packing is measured with a pressure gauge to obtain the pressure difference before and after the packing. The spray packing module 1 21, the spray packing module 2 22, and the spray packing module 3 23 with different packing depths are used for measurement. The corresponding packing wind resistance in each case can be obtained by using the formula wind resistance = pressure difference / (air volume*packing depth). The spray density at the packing is changed by adjusting the flow of the water pump 211. The spray density is obtained by the display value of the electromagnetic flowmeter 212. The spray density corresponds to the degree of water wetness of the spray packing module. After multiple tests, the wind resistance of the packing under different spray densities is obtained.

[0028] The wind resistance changes under different filling depths and spraying densities were measured, and the relationship between filling wind resistance and wind speed, spraying density, and filling depth was obtained.

[0029] The specific workflow includes:

[0030] 1. Before starting the motor, stop the fan and water pump 211, open all nozzles, and after the wind tunnel channel is unblocked, return the pressure gauge to zero.

[0031] 2. Turn on the fan and adjust it to the minimum setting. According to the target wind speed, look up the table to get the number of nozzles and operate the nozzles. Gradually increase the wind speed so that the pressure difference before and after the nozzle reaches the expected wind speed we need. Measure the pressure at three points before and after the nozzle and behind the packing. Obtain the wind speed and pressure difference, and you can calculate the packing resistance.

[0032] 3. Repeat the above operation by changing three different packing depths to obtain the packing resistance.

[0033] 4. The spray density of the filling area is controlled by adjusting the switch of the water pump 211 in the spray filling module. The spray density is reflected by the electromagnetic flowmeter 212 on the water inlet pipe of the spray filling module. Repeat the above operation to obtain the filling resistance.

[0034] It should be noted that, in this article, the terms include, contain or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Specific examples are used in this article to illustrate the principle and implementation of the technical solution of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. The above are only preferred implementations of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, for ordinary technicians in this technical field, without departing from the principle of the utility model, several improvements, modifications or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A cross-flow cooling tower packing resistance test system, characterized in that: The invention comprises an inlet module (1), a spray filler module (2), an observation module (3), an inspection / transition module (4), an upstream flow equalizing module (5), a nozzle module (6), a downstream flow equalizing module (7), and a fan module (8) which are connected in sequence; the inlet module (1) is a hollow cylinder structure, constituting an air inlet; a filler is arranged in the spray filler module (2), and a water basin is arranged above the filler; a pressure measuring tube and a transparent window are arranged in the observation module (3); the inspection / transition module (4) is a hollow cylinder structure; the upstream flow equalizing module (5) and the downstream flow equalizing module (7) are hollow cylinder structures; the nozzle module (6) is a hollow cylinder structure, a partition is arranged in the hollow cylinder, and nozzles that can be opened and closed are distributed on the partition; a fan is arranged in the fan module (8).

2. A cross-flow cooling tower packing resistance testing system according to claim 1, characterized in that: The observation module (3) is provided with a rain shield, which is located above the pressure measuring tube.

3. A cross-flow cooling tower packing resistance testing system according to claim 1, characterized in that: The nozzle is trumpet-shaped, and the diameter of the air inlet end is smaller than the diameter of the air outlet end.

4. A cross-flow cooling tower packing resistance testing system according to claim 1, characterized in that: The spray filler module (2) comprises a tower body, one side of the tower body is connected to the inlet module (1), and the other side opposite to the tower body is connected to the observation module (3); a filler is arranged in the tower body, a water broadcasting basin is arranged above the filler, and a water collection basin is arranged below the filler; a circulation pipeline is connected between the water collection basin and the water broadcasting basin, and a water pump (211) and an electromagnetic flowmeter (212) are arranged on the circulation pipeline.

5. A cross-flow cooling tower packing resistance testing system according to claim 1, characterized in that: The spray filler module (2) is detachably connected to the inlet module (1) and the inspection / transition module (4); the spray filler module (2) has a variety of models according to different filler depths.

6. A cross-flow cooling tower packing resistance testing system according to claim 1, characterized in that: Universal wheels are installed at the bottom of each module.

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