CN112742060B - Suspension bridge integrated condensation and rotating wheel cooperative dehumidification system and control method - Google Patents

Abstract

The invention discloses a suspension bridge integrated condensation and runner cooperative dehumidification system and a control method, belonging to the field of suspension bridge humidity control. Specifically include: condensation dehumidification circuit, used for the first-stage humidity treatment of suspension cable air intake, to achieve high-efficiency dehumidification under variable working conditions; runner dehumidification circuit, used for second-stage humidity treatment of suspension cable air intake, to achieve condensation dehumidification Further in-depth dehumidification of the outlet air; the waste heat utilization circuit uses the separated heat pipe to recover the waste heat of the air after dehumidification and regeneration of the runner, heats and condenses the dehumidified air under normal humidity conditions, and preheats the intake air of the rotor under high humidity conditions , to fully recover the waste heat of the system. The advantage of the present invention is that it utilizes the full recovery and cascade of waste heat, broadens the range of humidity treatment of the traditional system and the adaptability of the system under the changing environment of the suspension bridge, greatly improves the dehumidification energy efficiency, and realizes the dry air in the main cable and anchor room of the suspension bridge The integrated supply effectively slows down the corrosion and ensures the safety of the bridge.

Description

Integrated condensation and wheel synergistic dehumidification system and control method for suspension bridge

technical field

The invention belongs to the field of humidity control of suspension bridges, and relates to a suspension bridge integrated condensation and runner cooperative dehumidification system and a control method.

Background technique

In terms of anti-corrosion of suspension bridges, the air humidity in the main cable has always been an important technical index. In practical engineering applications, the main cable is exposed to the atmospheric environment for a long time, and the humidity environment will cause the steel wire of the main cable to corrode, which reduces the effective strand area and steel wire strength, seriously endangering the safety of the suspension bridge. The main cable dehumidification technology is to reduce the relative humidity inside the main cable by inputting dry air into the main cable, so that a relatively closed and dry environment is formed inside the main cable, thereby avoiding the corrosion of the steel wire in the main cable. Similarly, in the anchor room, there is also a need for drying of other accessories used to fix the main cable.

At present, most suspension bridges use wheel dehumidification technology to meet the control requirements of the air humidity in the suspension cables. The traditional wheel dehumidification technology can achieve deep dehumidification in the dehumidification system of the suspension bridge, and has the characteristics of large dehumidification capacity and non-corrosiveness. However, the wheel dehumidification technology has a high taste in the regeneration heat source, and the unit dehumidification capacity is expensive, so it is used in the dehumidification of the suspension bridge. It has the disadvantages of high dehumidification energy consumption and low economy.

Dehumidification technologies in other fields include condensation dehumidification, solution dehumidification, rotary dehumidification and membrane dehumidification. The conventional dehumidification system often adopts a single dehumidification method and cannot meet the dehumidification requirements required for bridge anticorrosion. It will have the disadvantage of poor adaptability when facing the complex and changeable environmental humidity in which the bridge is located, and the conventional dehumidification system can only be used for suspension bridges. Some structures are dehumidified, and the dehumidification range is limited and inefficient. For example, the dry air of the main cable in the suspension bridge requires a relative humidity of less than 40%, while the dry air supply condition in the anchorage room is slightly lower than this value. Therefore, how to couple the dehumidification requirements of different components in the suspension bridge under different humidity environments, how to realize the dehumidification of the whole bridge range and the deep dehumidification to meet the anti-corrosion requirements, and design a new type of efficient bridge integrated dehumidification system has become a skilled person in the field. Technical problems that urgently need to be solved.

Contents of the invention

Aiming at the dehumidification requirements of bridge anti-corrosion and the deficiency of existing conventional dehumidification methods, the present invention proposes a suspension bridge integrated condensation and runner cooperative dehumidification system and control method, which realizes the deep dehumidification requirements within the whole bridge range and effectively solves the traditional The efficiency of the dehumidification system is insufficient and the coupling is low.

In order to realize the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

Suspension bridge integrated condensation and wheel synergistic dehumidification system, including condensation dehumidification system, wheel dehumidification system, air supply pipeline, return air pipeline;

In the condensation dehumidification system, the flow meter is connected to a first humidity sensor, the first humidity sensor is connected to a refrigeration cycle module, and the refrigeration cycle module is connected to a second humidity sensor;

The condensing dehumidification system is connected to the runner dehumidification system through a connecting valve;

The wheel dehumidification system includes a treatment air pipeline, a regeneration air pipeline and a dehumidification wheel; the dehumidification wheel includes a wheel dehumidification area and a wheel regeneration area;

In the processing air pipeline, the communication valve is connected to a processing fan, the processing fan is connected to a runner dehumidification zone, and the runner dehumidification zone is connected to a third humidity sensor;

The air supply pipeline includes a first Roots blower, a third check valve and a second Roots blower;

The third humidity sensor is connected to a third one-way valve, and the third one-way valve is connected to a second Roots blower.

Preferably, in the refrigeration cycle module, a compressor, a condenser, a throttle valve, and an evaporator are connected in sequence, and the evaporator is connected to the compressor.

Preferably, in the regeneration air pipeline of the rotary dehumidification system, the communication valve is connected to the fourth one-way valve, the fourth one-way valve is connected to the regeneration fan, and the regeneration fan is connected to the cold end of the separated heat pipe. The separated heat pipe is connected to a regenerative heater, and the regenerative heater is connected to the regeneration zone of the runner, and the regeneration zone of the runner is connected to the hot end of the separated heat pipe; the regenerative blower is externally connected to a fifth one-way valve.

Preferably, the return air pipeline includes a second one-way valve, one end of the second one-way valve is connected between the communication valve and the fourth one-way valve, and the other end is connected between the third humidity sensor and the third one-way valve. middle of the valve.

Preferably, in the condensation dehumidification system, the second humidity sensor is connected to the first one-way valve, the first one-way valve is connected back to the refrigeration cycle module, and the refrigeration cycle module is connected to the first Roots blower.

Further preferably, the communication valve is connected between the second humidity sensor and the first one-way valve.

Preferably, the area ratio of the regeneration area of the dehumidification wheel to the dehumidification area of the wheel is 3:7.

According to the control method of the suspension bridge integrated condensation and runner cooperative dehumidification system described in any one of the above, the Unicom valve is closed, the first one-way valve is opened, and the condensation dehumidification system is used for dehumidification;

Close the first one-way valve, open the Unicom valve, close the fourth one-way valve, open the fifth one-way valve, close the second one-way valve, open the third one-way valve, use the condensing dehumidification system and the rotary dehumidification system The processing air pipeline cooperates with dehumidification.

Preferably, close the first one-way valve, open the connecting valve, close the fourth one-way valve, open the fifth one-way valve, open the second one-way valve, dehumidify through the return air circulation, and open the third one-way valve after the dehumidification is completed. One-way valve, dehumidification with condensation dehumidification system and rotary dehumidification.

Further preferably, the fourth one-way valve is opened, and the condensation dehumidification system and the rotary dehumidification are used for coordinated dehumidification.

Beneficial effect

Compared with the prior art, the present invention has the following advantages:

(1) Utilizing condensation and runners to dehumidify together, the range of humidity treatment is broadened and the system adaptability of the suspension bridge to changing environments;

(2) Reduce the total investment of the system under the same dehumidification capacity, and the capacity of the runner part is greatly reduced;

(3) It realizes the full recovery and cascade utilization of waste heat in the system, and greatly improves the dehumidification energy efficiency.

Description of drawings

Fig. 1 is a schematic structural view of the suspension bridge integrated condensation and runner cooperative dehumidification system of the present invention.

In the figure: flow meter 1, first humidity sensor 2, throttle valve 3, condenser 4, evaporator 5, compressor 6, second humidity sensor 7, first one-way valve 8, first Roots blower 9, Unicom valve 10, processing fan 11, third humidity sensor 12, second one-way valve 13, third one-way valve 14, second Roots blower 15, fourth one-way valve 16, fifth one-way valve 17, regeneration Fan 18, regenerative heater 19, separate heat pipe 20, wheel dehumidifier 21, wheel dehumidification zone 22, wheel regeneration zone.

detailed description

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

As shown in Figure 1, the present invention provides a suspension bridge integrated condensation and runner cooperative dehumidification system, including a condensation dehumidification system, a runner dehumidification system, an air supply pipeline, and a return air pipeline;

In the condensation dehumidification system, the flow meter 1 is connected to the first humidity sensor 2, the first humidity sensor 2 is connected to the refrigeration cycle module, and the refrigeration cycle module is connected to the second humidity sensor 7; the condensation dehumidification system and the wheel dehumidification system Connected through the Unicom valve 10; the runner dehumidification system includes the treatment air pipeline, the regeneration air pipeline and the dehumidification runner 21; the dehumidification runner 21 includes the runner dehumidification area 22 and the runner regeneration area 23; in the treatment air pipeline, the Unicom The valve 10 is connected to the processing fan 11, and the processing fan 11 is connected to the runner dehumidification area 22, and the runner dehumidification area 22 is connected to the third humidity sensor 12; the air supply pipeline includes the first Roots blower 9, the third one-way valve 14 and the second Roots blower 15 ; the third humidity sensor 12 is connected to a third one-way valve 14 , and the third one-way valve 14 is connected to a second Roots blower 15 .

In this embodiment, in the refrigeration cycle module, the compressor 6 , the condenser 4 , the throttle valve 3 , and the evaporator 5 are connected in sequence, and the evaporator 5 is connected to the compressor 10 .

In this embodiment, in the regenerative air pipeline of the rotary dehumidification system, the unicommunication valve 10 is connected to the fourth one-way valve 16, the fourth one-way valve 16 is connected to the regenerative fan 18, and the regenerative fan 18 is connected to the cold end of the separated heat pipe 20. Type heat pipe 20 is connected to regenerative heater 19, and regenerative heater 19 is connected to runner regeneration zone 23, and runner regeneration zone 23 is connected to the hot end of separate heat pipe 20; one end of the fifth check valve 17 is connected to regenerative fan 18, and the other end is connected to outside Humid air connected.

In this embodiment, the return air pipeline includes a second one-way valve 13, one end of the second one-way valve 13 is connected between the joint valve 10 and the fourth one-way valve 16, and the other end is connected between the third humidity sensor 12 and the fourth one-way valve. In the middle of three one-way valves 14.

In this embodiment, in the condensation dehumidification system, the second humidity sensor 7 is connected to the first one-way valve 8, the first one-way valve 8 is connected back to the refrigeration cycle module, and the refrigeration cycle module is connected to the first Roots blower 9.

In this embodiment, the communication valve 10 is connected between the second humidity sensor 7 and the first one-way valve 8 .

In this embodiment, the area ratio of the area of the regeneration area 23 of the dehumidification wheel 21 to the area of the dehumidification area 22 of the wheel is 3:7.

The suspension bridge integrated condensation and wheel synergistic dehumidification system adopts different operation control methods for different system conditions to achieve efficient and deep dehumidification under multi-humidity conditions.

The working principle of the condensation dehumidification system described in the present invention is as follows:

The working process of the refrigeration cycle module, the low-temperature and low-pressure refrigerant gas is compressed by the compressor 6, and the compressed high-temperature and high-pressure gas enters the condenser 4 to exchange heat with the dehumidified air for cooling, and then enters the evaporator 5 through the throttle valve 3 Evaporate and absorb heat to become a low-temperature and low-pressure gas, and finally return to the compressor 6 to complete the cycle.

Condensation and dehumidification principle: use the evaporator 5 as a cooling device to cool the humid air to the dew point temperature or below, precipitate water vapor greater than the saturated moisture content, reduce the absolute moisture content of the humid air, and then use the condensation heat of the refrigerant to heat the low-temperature humid air , so as to further reduce the relative humidity of the air and achieve the purpose of efficient dehumidification.

The working principle of the rotary dehumidification system: the dehumidification rotor 21 is divided into the rotor dehumidification area 22 and the rotor regeneration area 23, the humid air enters the dehumidification area through the processing fan 11, and the moisture in the humid air is absorbed by the hygroscopic agent on the dehumidification rotor 21 , to achieve the purpose of deep dehumidification.

The dehumidification rotor 21 rotates continuously during the dehumidification process. After the moisture absorbent becomes saturated, it will transfer to the regeneration zone 23 of the rotor. During the regeneration process, the regeneration air (composed of condensed and dehumidified air and air outside the system) is separated The cold end of the type heat pipe 20 is heated, and after being heated by the regeneration heater 19, it enters the regeneration zone. In the high temperature state, the water in the hygroscopic agent is desorbed, and the temperature of the regeneration air decreases and the humidity increases. The energy consumption of regeneration heating is reduced, and the regeneration air is finally exhausted to the outside of the system. Through the above-mentioned method, the process of the moisture absorbent absorbing moisture and being dried is reciprocated.

The suspension bridge integrated condensation and wheel synergistic dehumidification system adopts different operation control strategies for different system conditions to achieve efficient and deep dehumidification under multi-humidity conditions.

Operating condition 1: When the air humidity near the suspension bridge is low, the system load is small, and the humidity can be adjusted only by the condensation dehumidification system. The humid air passes through the flow meter 1 and the first humidity sensor 2 to measure relevant parameters. In the evaporator 5 whose temperature is less than or equal to the dew point temperature, moisture greater than the saturated moisture content is precipitated, and after being detected by the second humidity sensor 7, if Meet the dehumidification requirements, the Unicom valve 10 remains closed, the first one-way valve 8 remains open, the humid air enters the condenser 4 for heat exchange, the temperature rises after absorbing the condensation heat, the relative humidity of the humid air further decreases, and finally passes through the first Roots Fan 9 is delivered to the suspension bridge, realizing the process of efficient dehumidification.

Operating condition 2: When the air humidity near the suspension bridge is high, the system load is high, and it is necessary to rely on the cooperation of the condensation dehumidification system and the rotary dehumidification system to achieve humidity regulation.

The humid air passes through the flow meter 1 and the first humidity sensor 2 to measure relevant parameters. In the evaporator 5 whose temperature is less than or equal to the dew point temperature, moisture greater than the saturated moisture content is precipitated, and after being detected by the second humidity sensor 7, if Does not meet the dehumidification requirements. At this time, the first one-way valve 8 remains closed, the connecting valve 10 remains open, the fourth one-way valve 16 remains closed, and the fifth one-way valve 17 remains open. The humid air after condensation and dehumidification enters the runner The dehumidification processing air pipeline is sent to the dehumidification area 22 by the processing fan 11, and the moisture in the humid air is further absorbed by the hygroscopic agent on the dehumidification rotor 21, and is detected by the third humidity sensor 12 to meet the dehumidification requirements. The directional valve 13 is kept closed, the third one-way valve 14 is kept open, and the dehumidified air is sent to the suspension bridge through the second Roots wind 15, thereby realizing the process of condensation and dehumidification coordinated by the runner.

Operating condition 3: When the air humidity near the suspension bridge is very high, the system load is high, and it is necessary to rely on the cooperation of the condensation dehumidification system and the rotary dehumidification system to achieve humidity regulation.

The humid air passes through the flow meter 1 and the first humidity sensor 2 to measure relevant parameters. In the evaporator 5 whose temperature is less than or equal to the dew point temperature, moisture greater than the saturated moisture content is precipitated. After being detected by the second humidity sensor 7, no To meet the dehumidification requirements, at this time, the first one-way valve 8 is kept closed, the connecting valve 10 is kept open, the fourth one-way valve 16 is kept closed, and the fifth one-way valve 17 is kept open, and the humid air after condensation and dehumidification enters the runner for dehumidification The processing air pipeline is sent to the dehumidification area 22 by the processing fan 11, and the moisture in the humid air is further absorbed by the hygroscopic agent on the dehumidification rotor 21, and is detected by the third humidity sensor 12. If the dehumidification requirement is not met, the third The one-way valve 14 is kept closed, the second one-way valve 13 is kept open, and the humid air is dehumidified again through the return air pipeline, the processing fan 11 and the dehumidification area 22 of the runner, and so on for several times until the humidity of the outlet humid air meets the requirements. At this time, the second one-way valve 13 is kept closed, the third one-way valve 14 is kept open, and the dehumidified air is sent to the suspension bridge through the second Roots blower 15, thereby realizing the multiple cooperative dehumidification of condensation and the runner process.

Operating condition 4: When the air humidity near the suspension bridge is extremely high, the system load is extremely high, and the conventional operating condition cannot meet the outlet humidity requirements. Part of the dehumidified air must be used as a regeneration wet sink to strengthen the dehumidification effect of the runner and achieve deep dehumidification.

The humid air passes through the flow meter 1 and the first humidity sensor 2 to measure relevant parameters. In the evaporator 5 whose temperature is less than or equal to the dew point temperature, moisture greater than the saturated moisture content is precipitated. After being detected by the second humidity sensor 7, no Meet the dehumidification requirements. At this time, the first one-way valve 8 is kept closed, the connecting valve 10 is kept open, and the fourth one-way valve 16 is kept closed. The humid air after condensation and dehumidification enters the treatment air pipeline of the runner dehumidification, and the treatment air is passed through the fan. 11 is sent to the dehumidification area 22 of the dehumidification wheel, and the moisture in the humid air is further absorbed by the hygroscopic agent on the dehumidification wheel 21. After being detected by the third humidity sensor 12 at the outlet, the dehumidification requirement is not met. At this time, the first one-way valve 8 remains closed. Unicom valve 10 remains open, fourth one-way valve 16 remains open, fifth one-way valve 17 remains open, and the humid air after condensation and dehumidification is divided into two paths:

All the way through the fourth one-way valve 16 into the regenerative air pipeline of the runner dehumidification system, mixed with the external humid air, driven by the regenerative fan 18, passing through the cold end of the separate heat pipe 20, the regenerative heater 19, and the regenerative zone of the runner in sequence 23 and the hot end of the separated heat pipe 20, and finally discharge directly to the outside of the dehumidification system.

The other way of humid air is sent to the dehumidification area 22 by the processing fan 11. The moisture in the humid air is further absorbed by the hygroscopic agent on the dehumidification rotor 21, and is detected by the third humidity sensor 12 at the outlet. If the dehumidification requirement is not met, the third unit The one-way valve 14 is kept closed, the second one-way valve 13 is kept open, and the humid air is dehumidified again through the return air pipeline, the processing fan 11 and the dehumidification area 22 of the runner, and so on for many times until the humidity of the outlet wet air meets the requirements. At this time, the second one-way valve 13 remains closed, the third one-way valve 14 remains open, and the dehumidified air is sent to the suspension bridge through the second Roots blower 15, thereby realizing the process of condensation and deep dehumidification coordinated by the runner.

The invention aims at the anti-corrosion dehumidification requirements of the suspension bridge. The integrated synergistic dehumidification system combining condensation dehumidification and rotary dehumidification can perform deep dehumidification with large air volume, wide dehumidification range and high dehumidification efficiency. Compared with the traditional dehumidification system, the present invention also makes full use of condensation heat and desorption heat as air temperature adjustment or regeneration heat source, introduces separate heat pipes, realizes energy cascade utilization of each waste heat source, and further improves system energy efficiency.

The above-mentioned embodiments are only preferred implementation modes of the present invention. It should be pointed out that for those skilled in the art, some improvements and equivalent replacements can be made without departing from the principle of the present invention. Technical solutions requiring improvement and equivalent replacement all fall within the protection scope of the present invention.

Claims (3)

1. The control method of the integrated condensation and wheel synergistic dehumidification system of the suspension bridge, characterized in that: the integrated condensation and wheel synergistic dehumidification system of the suspension bridge includes a condensation dehumidification system, a wheel dehumidification system, an air supply pipeline, and a return air duct road; In the condensation dehumidification system, the flow meter (1) is connected to the first humidity sensor (2), the first humidity sensor (2) is connected to the refrigeration cycle module, and the refrigeration cycle module is connected to the second humidity sensor (7 ); The condensing dehumidification system is connected to the runner dehumidification system through a connecting valve (10); The runner dehumidification system includes a processing air pipeline, a regeneration air pipeline and a dehumidification runner (21); the dehumidification runner (21) includes a runner dehumidification zone (22) and a runner regeneration zone (23); In the processing air pipeline, the communication valve (10) is connected to the processing fan (11), the processing fan (11) is connected to the runner dehumidification zone (22), and the runner dehumidification zone (22) is connected to the third humidity sensor (12); The air supply pipeline includes a first Roots blower (9), a third check valve (14) and a second Roots blower (15); The third humidity sensor (12) is connected to a third one-way valve (14), and the third one-way valve (14) is connected to a second Roots blower (15); In the regeneration air pipeline of the rotary dehumidification system, the communication valve (10) is connected to a fourth one-way valve (16), and the fourth one-way valve (16) is connected to a regeneration fan (18). The fan (18) is connected to the cold end of the separated heat pipe (20), and the separated heat pipe (20) is connected to the regenerative heater (19), and the regenerative heater (19) is connected to the regeneration area (23) of the runner. The wheel regeneration area (23) is connected to the hot end of the separated heat pipe (20); the regeneration fan (18) is externally connected to the fifth one-way valve (17); The return air pipeline includes a second one-way valve (13), one end of the second one-way valve (13) is connected between the communication valve (10) and the fourth one-way valve (16), and the other end is connected In the middle of the third humidity sensor (12) and the third one-way valve (14); in the condensation dehumidification system, the second humidity sensor (7) is connected to the first one-way valve (8), and the first The one-way valve (8) is connected back to the refrigeration cycle module, and the first Roots blower (9) is connected to the refrigeration cycle module; the communication valve (10) is connected to the second humidity sensor (7) and the first one-way valve the middle of (8); The control methods include: Close the Unicom valve (10), open the first one-way valve (8), and dehumidify with the condensation dehumidification system; Close the first one-way valve (8), open the unidirectional valve (10), close the fourth one-way valve (16), open the fifth one-way valve (17), close the second one-way valve (13), open the third The one-way valve (14) uses the treatment air pipeline in the condensing dehumidification system and the runner dehumidification system to coordinate dehumidification; Close the first one-way valve (8), open the connecting valve (10), close the fourth one-way valve (16), open the fifth one-way valve (17), open the second one-way valve (13), and pass the return air The pipeline circulates dehumidification. After the dehumidification is completed, the third one-way valve (14) is opened, and the condensation dehumidification system and the rotary dehumidification are used for dehumidification; Open the fourth one-way valve (16), and use the condensing dehumidification system and the dehumidification of the runner to coordinate dehumidification. 2. The control method of the suspension bridge integrated condensation and runner cooperative dehumidification system according to claim 1, characterized in that: in the refrigeration cycle module, the compressor (6), the condenser (4), the throttle valve (3 ), the evaporator (5) is connected in sequence, and the evaporator (5) is connected with the compressor (6). 3. The control method of the suspension bridge integrated condensation and runner cooperative dehumidification system according to claim 1, characterized in that: the area of the runner regeneration zone (23) in the dehumidification runner (21) and the runner dehumidification zone ( 22) with an area ratio of 3:7.

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