CN215674782U - Environmental conditioning device for horizontal induced draft air cooler - Google Patents

Abstract

The utility model provides an environment adjusting device for horizontal induced draft air cooler, includes water supply assembly (1), pipeline subassembly (2), monitoring control system (4), its characterized in that: the monitoring control system (3) comprises an ambient temperature sensor (32), a humidity sensor (31), a wind speed sensor (33), a wind direction sensor (34), a fin temperature sensor (35), a hard disk for storing control data, and a CPU for processing data transmitted by each sensor and sending control signals. The cooling liquid is subjected to high-pressure fine atomization, the air side environment of the air cooler is improved, the heat exchange capacity of the air cooler is improved, and the safe operation of the air cooler is guaranteed, so that the technological requirement of a cooling system is met. It has the advantages of high water utilization rate, high cooling efficiency, low cost and the like.

Description

Environmental conditioning device for horizontal induced draft air cooler

Technical Field

The utility model relates to the technical field of high-pressure jet atomization and heat transfer, in particular to an environment adjusting device for a horizontal induced draft type air cooler.

Background

The circulating cooling system is indispensable in the industrial field, and the air cooling system using air as a cooling medium is widely applied at home and abroad for many years due to the excellent energy-saving and environment-friendly performance, and the working principle of the circulating cooling system is that cold air transversely sweeps the outside of a fin tube to condense or cool high-temperature process fluid in the tube. The air cooler is the core equipment of the air cooling system and can be divided into a blast type, an induced air type and a natural air type. The arrangement structure of the device is generally horizontal, inclined top type, vertical type and the like. The inclined top blowing air cooler is commonly used for steam condensation of a power station steam turbine, and the horizontal induced air cooler is commonly used for cooling production media in petrochemical industry, coal chemical industry and oil gas processing production.

The design of the air cooler is to select the design temperature according to the local climate condition and the equipment operation requirement, so as to determine the required heat exchange area. Air cooler equipment is comparatively sensitive to ambient temperature, if the temperature surpassed design temperature, equipment cooling capacity will descend to some extent, can influence technology product quality when serious, brings the potential safety hazard. Sometimes, in order to ensure production safety, the operation load has to be reduced in a high temperature period, and the productivity is reduced to cope with the high temperature. Therefore, it is critical to effectively address the effects of climate change on the air cooler.

In response to such problems, the related art has conducted research and analysis in various technical levels. The utility model discloses a peak cooling device of an air cooling condenser, which comprises a fan, a surface type radiator, a cooling water pipeline, a nozzle and the like. The method mainly adopts a mode of increasing water cooling, and auxiliary cooling of steam is carried out in a high-temperature period in summer. The scheme mainly comprises the steps of adding heat exchange equipment, having higher investment cost and greatly changing the original equipment. In order to solve the heat exchange effect in a short time in summer, more consideration is given to adopting a system with auxiliary properties to meet the requirements.

The utility model discloses a "X shape atomizing humidification heat sink of direct air cooling system in power station" as grant utility model patent of publication No. CN201652683U, this technical scheme is designed to power station air cooling system oblique top blast air cooler, mainly by dividing water tank, water supply branch pipe, the nozzle, metal collapsible tube etc. constitutes, top in "A" shaped steel frame to the mode of whereabouts is from top to bottom sprayed water, in order to increase air humidity. The arrangement mode adopts low-pressure water, increases the retention time of liquid drops in the air by height difference, but does not consider the size of the liquid drops and the atomization coverage area, and the liquid drops can not be completely evaporated easily in the air and directly fall to the ground.

The utility model discloses a "air cooling condenser spray humidification cooling system who combines the guide plate" as the utility model patent of grant publication No. CN208487710U, this technical scheme also is to the design of power station air cooling system pitched roof blast air cooler, comprises water tank, multistage centrifugal pump, governing valve, guide plate etc.. The air at the outlet of the fan is guided by the guide plate, and water is sprayed to the upper part of the guide plate to increase the air humidity and reduce the temperature. The defects are basically consistent with the atomization humidification cooling device mentioned above.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an environment adjusting device for a horizontal induced draft type air cooler, which can improve the air side environment of the air cooler by finely atomizing cooling liquid under high pressure in a high-temperature period in summer, so that the heat exchange capacity of the air cooler is improved, the safe operation of the air cooler is guaranteed, and the process requirement of a cooling system is met. It has the advantages of high water utilization rate, high cooling efficiency, low cost and the like.

In order to achieve the purpose, the utility model provides the following technical scheme: in order to achieve the purpose, the utility model provides the following technical scheme: the environment adjusting device for the horizontal induced draft air cooler comprises a water supply assembly (1), a pipeline assembly (2) and a monitoring control system (4);

the water supply assembly (1) comprises a water tank (14) with a liquid level meter (15), a primary filter (12), a first electric valve (13) and a primary safety valve (11) are arranged at the front end of the water tank (14), and a secondary safety valve (16) and a second electric valve (17) are arranged at the rear end of the water tank (14);

pipeline subassembly (2) include a plurality of groups high-pressure pump pipeline that link to each other through hose and secondary filter (26), and each high-pressure pump pipeline includes high-pressure pump (25), set up fourth motorised valve (27) in high-pressure pump (25) front end, set up third motorised valve (22) and blowoff valve (23) and a plurality of settings by third motorised valve (22) control at the terminal high pressure atomizing nozzle (21) of pipeline in high-pressure pump (25) rear end, and its technical essential is:

the monitoring control system (4) comprises an ambient temperature sensor (41), a humidity sensor (42), a wind speed sensor (43), a wind direction sensor (44), a fin temperature sensor (45), a hard disk for storing control data, and a CPU for processing data transmitted by each sensor and sending control signals;

the high-pressure atomizing nozzle (21) comprises a nozzle core (211), a front nozzle cover (212) arranged at the front part of the nozzle core (211), a rear nozzle cover (213) arranged at the rear part of the nozzle core (211) and an air nozzle (214), the front nozzle cover (212) is provided with a front concave cavity (217), a nozzle hole (218) is formed in the front concave cavity (217), a liquid inlet hole (215) and an air inlet hole (216) are formed in the surface of the nozzle core (211), the liquid inlet hole (215) is communicated with the front concave cavity (217), the air inlet hole (216) is connected with an air nozzle (214), the front end of the air nozzle (214) is in a horn mouth shape, the front end of the air nozzle (214) is sleeved in the nozzle hole (218), a rear concave cavity (219) is formed in the rear nozzle cover (213), the liquid inlet hole (215) is communicated with the rear concave cavity (219) of the rear nozzle cover (213), and the rear concave cavity (219) is connected with the front concave cavity (217) through a plurality of through holes formed in the nozzle core (211); a sealing ring (220) is arranged between the front nozzle cover (212) and the nozzle core (211), and the sealing ring (220) is arranged between the front nozzle cover (212) and the nozzle core (211).

The utility model has the beneficial effects that: in the whole technical scheme, the utility model can monitor all environmental parameters influencing the cooling intensity in real time and make optimal feedback control so as to achieve the optimal cooling effect with the lowest energy consumption.

Specifically, the method comprises the following steps: the sensors comprise a temperature sensor, a humidity sensor, a wind speed sensor and a wind direction sensor which are used for monitoring the environment.

The temperature and humidity sensor can comprehensively judge the heat conduction (emission) speed in the current environment, for example, in an environment of 5-10 ℃, the higher the humidity is, the better the heat conduction effect is. At this time, the water mist ejection amount can be appropriately reduced.

Wind speed, wind direction sensor can synthesize and judge environment wind to water smoke, then are used for judging the influence of environment wind to water smoke injection position and spray regime to the air cooling equipment of the vertical setting of cooling shaft is for example, and its fan radiating fin sets up side by side usually, and the water smoke placement that lies in outermost side nozzle this moment can't all spray to the fin under the influence of environment wind on, leads to this part cooling water to be wasted. Through the comprehensive judgment of the sensors, the corresponding electromagnetic valve can be automatically controlled at the moment to close the nozzle, so that the endless consumption of water resources is avoided.

In addition, the sensor also comprises a gas circuit pressure sensor and a water circuit pressure sensor which monitor the pressure of the pipeline in real time; a temperature sensor for monitoring the cooled fin. The pressure sensor in the pipeline feeds back the pressure in the pipeline in real time and is used for adjusting the gas-water ratio at the nozzle in real time, so that the optimal cooling effect is achieved with the lowest consumption. And the temperature sensor on the fin can monitor the cooling effect in real time and judge whether the water mist cooling system needs to be started.

In summary, the control system of the present invention can automatically determine the environmental conditions and the pipeline conditions by relying on the big data in combination with the feedback signals of the sensors, and further automatically control the components such as the water path component, the gas path component, etc., so as to finally achieve the purpose of achieving the best cooling effect with the lowest energy consumption.

Drawings

Fig. 1 is a schematic diagram of the working principle of the present invention.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

Fig. 3 is a schematic top view of fig. 2.

FIG. 4 is a schematic structural view of a high pressure nozzle according to the present invention.

Detailed Description

The following describes the present invention in detail with reference to the embodiments with reference to fig. 1 to 4. The environment adjusting device for the horizontal induced draft air cooler comprises a water supply assembly 1, a pipeline assembly 2 and a monitoring control system 4.

The water supply assembly 1 comprises a water tank 14 with a liquid level meter 15, a primary filter 12, a first electric valve 13 and a primary safety valve 11 are arranged at the front end of the water tank 14, and a secondary safety valve 16 and a second electric valve 17 are arranged at the rear end of the water tank 14.

The water source is communicated with a water tank through an electric valve, the water tank supplies water for the pump set, and a secondary filter, a pressure gauge, a connecting hose and the like are arranged at the outlet of the water tank. The hose is connected with the high-pressure pump set. The pump group can be provided with a plurality of high-pressure pumps (four pumps are taken as an example in the embodiment) according to the requirements, and can be used for supplying water in a stepped manner under different climatic conditions.

The water supply assembly is connected to the pipeline assembly through a hose, the pipeline is fixed and welded on the pipeline bracket 34, and in order not to change the original structure, the pipeline bracket 34 is fixed and propped against the steel structure 33 of the original cooling fin 32 through welding or bolts. All branch pipelines are distributed below different areas of the cooling fins 32 of the air cooling fan 31, and the distance between the branch pipelines and the distance between the nozzles are determined, so that the requirement that atomized jet flow can uniformly cover all fin inlet environments can be met according to parameters such as the jet angle, the distance, the area and the like of the nozzles. The pumps in the pump group are respectively communicated with the main pipe for controlling the pipelines in each area, and the high-pressure water inlet end of each pipeline is provided with an electric valve.

The pipeline assembly 2 comprises a plurality of groups of high-pressure pump pipelines connected with a secondary filter 26 through hoses, and each group of pipelines comprises a high-pressure pump 25, a fourth electric valve 27 arranged at the front end of the high-pressure pump 25, a third electric valve 22 and an exhaust valve 23 arranged at the rear end of the high-pressure pump 25, and a plurality of high-pressure atomizing nozzles 21 arranged at the tail ends of the pipelines and controlled by the third electric valve 22. The high-pressure pump set is arranged on the chassis and is connected with the water supply assembly through a high-pressure hose, and the water pressure in the pipe is monitored in real time through a pressure gauge.

The monitoring control system 4 comprises an ambient temperature sensor 41, a humidity sensor 42, a wind speed sensor 43, a wind direction sensor 44, a fin temperature sensor 45 (or a fan speed sensor, which can directly or indirectly obtain the actual working state of the load), a hard disk for storing control data, and a CPU for processing data transmitted by each sensor and sending control signals. The CPU can adjust the operation parameters of the system, control the working state or output power of the high-pressure pump in a centralized manner, and control the electric valve in the pipeline system.

The monitoring control system monitors the temperature and the humidity of the air environment in real time and judges whether the environment adjusting device needs to be started or not by combining with the operation parameters of the air cooler. When the ambient temperature is higher than the design temperature of the air cooler or the air cooling system needs the temperature, the device is started. And calculating the water consumption according to the detection data, thereby controlling the pump set to open the high-pressure pumps in different areas and the electric valves of different branches. At the end of the nozzle, an atomized jet of fine particles will be produced, typically with an average particle diameter of 50 μm or less. The monitoring control system can automatically judge the running quantity and valve action of the pump according to the change of the environment and the running parameters of the air cooler, and can judge whether to stop the equipment running and close the valve after the environment is regulated to meet the requirement. The pipeline is also provided with a water outlet, so that the medium can be emptied when the pipeline is not needed for a long time.

Control data acquisition

The fin is mainly based on circulation of air in order to improve the radiating effect, but simultaneously, when wind-force was too big, also can influence the drop point of water smoke, causes its comprehensive cooling effect to be difficult to define, if continue to let in the cooling water this moment, will waste partial water resource certainly. For this purpose, the following method is used to carry out a standardized measurement and to generate a standardized curve from the measurement results, so that an optimal cooling strategy is achieved under different wind conditions.

In the experimental stage, environmental parameters including the temperature, the humidity, the wind speed, the wind direction and the like of the fins are collected under the full-load condition of the load equipment by simulating different seasons and layout heights. The influence factors of the seasons mainly include temperature and humidity, and the experiment takes humidity as a main influence factor because the humidity influences the heat conductivity coefficient of air. Different installation heights produce variations in wind direction and wind speed (wind force), which in turn is the main factor.

A single group of rotatable fins with a heating device is adopted, and the actual working conditions of the fins are simulated in a standardized parameter mode.

Selection of fin size: the high pressure nozzle can cover just the entire fin pack with the same throw distance (as it is actually used).

Setting of a heating device: the heating power of the heating device is ensured to be larger than the heat dissipation efficiency of the heat dissipation fins, and a temperature threshold T0 can be set. To simulate heating of the load.

Setting of nozzle injection amount: the fins spraying the mist can fall linearly from the temperature threshold. (neglecting the optimal air-water ratio) at the same time, the fan-shaped spraying area of the nozzle should just cover the fin group, and the nozzle should be positioned right above the center line of the fin, so as to eliminate the influence of the wind direction on the heat dissipation effect.

Humidity f (w) control curve: and (3) starting the heating device, closing the heating device after the temperature of the fins reaches a threshold T0 (the temperature is reduced to be below T0, the heating device is not started), under the condition of closing the fan (no wind condition), measuring the time T0 of naturally cooling the temperature of the fins from the temperature threshold T0 to the room temperature T1 by taking 1% as increment, and generating a control curve f0 (w).

Humidity/wind speed f (w/v) control curve: and (3) starting the heating device, closing the heating device after the temperature of the fins reaches a threshold T0 (the temperature is reduced to below T0, the heating device is not started), increasing the wind speed v of the fan step by taking 0.5m/s as increment, matching different humidity w conditions (taking 1% as increment), measuring the time T1 of naturally cooling the temperature of the fins from the temperature threshold T0 to the room temperature T1, and generating a control curve f1(w, v).

Humidity/wind speed f (w/v) simulation curve: and (3) starting the heating device, keeping constant temperature after the temperature of the fins reaches a threshold T0 (the temperature is reduced to below T0, and then starting the heating device), starting the atomizing nozzle, increasing the wind speed v of the fan step by taking 0.5m/s as increment, matching different humidity w conditions (taking 1% as increment), measuring the time T2 for cooling the temperature of the fins from the temperature threshold T0 to the set temperature T2, and generating a simulation curve f2(w, v).

And (4) result screening, fitting f1(w, v) and f2(w, v), extracting a value with the similarity of more than 90%, wherein the high similarity represents that the cooling effect is not greatly influenced by water mist spraying, and establishing a control data set by using the extracted data. If the humidity and wind power values of the environment fall into the data set, no water mist is needed for cooling.

Application examples

In the high temperature period in summer, when the environment temperature is higher than the design temperature of the air cooler or the heat exchange performance cannot meet the production requirement, the environment adjusting device can be started. The device introduces high-pressure water into an air inlet below the air cooler, and the nozzles are uniformly arranged and have jet flow directions opposite to the air flow direction. The temperature and humidity sensors are arranged in the environment near the air cooler, so that the environmental conditions can be detected in real time, and the control system can automatically judge whether the device needs to be started according to detection data.

The specific use method comprises the following steps:

step 1, opening a first-stage safety valve 11 and a first electric valve 13, supplementing water to a water tank 14, and stopping supplementing water when a liquid level meter 15 displays that the water level meets the use condition.

And 2, connecting a water inlet hose and a water outlet hose of the high-pressure pump, opening the secondary safety valve 16 and the second electric valve 17, and opening the electric valves of the corresponding pipelines through the monitoring control system.

And 3, starting the high-pressure pump, and controlling the rotating speed of the high-pressure pump and the adjusting amount of the electric valve by the monitoring control system to obtain the minimum water consumption and the optimal atomization effect.

Description of reference numerals:

1 Water supply Assembly

11 first-stage safety valve

12 first-stage filter

13 first electrically operated valve

14 water tank

15 liquid level meter

16 two-stage safety valve

17 second electrically operated valve

2 pipeline assembly

21 high-pressure atomizing nozzle

211 nozzle core

212 front nozzle cover

22 third electrically operated valve

220 sealing ring

23 evacuation valve

24 one-way valve

25 high pressure pump

26 two-stage filter

27 fourth electrically operated valve

3 support component

31 air cooling fan

32 cooling fin

33 steel structure

34 pipeline support

4 monitoring control system

41 ambient temperature sensor

42 humidity sensor

43 wind speed sensor

44 wind direction sensor

45 fin temperature sensor.

Claims (1)

1. An environment adjusting device for a horizontal induced draft air cooler comprises a water supply assembly (1), a pipeline assembly (2) and a monitoring control system (4);

the water supply assembly (1) comprises a water tank (14) with a liquid level meter (15), a primary filter (12), a first electric valve (13) and a primary safety valve (11) are arranged at the front end of the water tank (14), and a secondary safety valve (16) and a second electric valve (17) are arranged at the rear end of the water tank (14);

pipeline subassembly (2) include a plurality of groups high-pressure pump pipeline that link to each other through hose and secondary filter (26), and each high-pressure pump pipeline includes high-pressure pump (25), set up fourth motorised valve (27) in high-pressure pump (25) front end, set up third motorised valve (22) and blowoff valve (23) and a plurality of settings by third motorised valve (22) control at the terminal high pressure atomizing nozzle (21) of pipeline in high-pressure pump (25) rear end, its characterized in that:

the monitoring control system (4) comprises an ambient temperature sensor (41), a humidity sensor (42), a wind speed sensor (43), a wind direction sensor (44), a fin temperature sensor (45), a hard disk for storing control data, and a CPU for processing data transmitted by each sensor and sending control signals;

the high-pressure atomizing nozzle (21) comprises a nozzle core (211), a front nozzle cover (212) arranged at the front part of the nozzle core (211), a rear nozzle cover (213) arranged at the rear part of the nozzle core (211) and an air nozzle (214), the front nozzle cover (212) is provided with a front concave cavity (217), a nozzle hole (218) is formed in the front concave cavity (217), a liquid inlet hole (215) and an air inlet hole (216) are formed in the surface of the nozzle core (211), the liquid inlet hole (215) is communicated with the front concave cavity (217), the air inlet hole (216) is connected with an air nozzle (214), the front end of the air nozzle (214) is in a horn mouth shape, the front end of the air nozzle (214) is sleeved in the nozzle hole (218), a rear concave cavity (219) is formed in the rear nozzle cover (213), the liquid inlet hole (215) is communicated with the rear concave cavity (219) of the rear nozzle cover (213), and the rear concave cavity (219) is connected with the front concave cavity (217) through a plurality of through holes formed in the nozzle core (211); a sealing ring (220) is arranged between the front nozzle cover (212) and the nozzle core (211), and the sealing ring (220) is arranged between the front nozzle cover (212) and the nozzle core (211).

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