WO2021212671A1 - 长效免维护盐雾过滤系统及控制方法和盐雾吸收液浓度筛选方法 - Google Patents
长效免维护盐雾过滤系统及控制方法和盐雾吸收液浓度筛选方法 Download PDFInfo
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- WO2021212671A1 WO2021212671A1 PCT/CN2020/102248 CN2020102248W WO2021212671A1 WO 2021212671 A1 WO2021212671 A1 WO 2021212671A1 CN 2020102248 W CN2020102248 W CN 2020102248W WO 2021212671 A1 WO2021212671 A1 WO 2021212671A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- the invention relates to a long-acting maintenance-free salt mist filtration system and a control method, and also relates to a method for screening the concentration of salt mist absorption liquid in the long-acting maintenance-free salt mist filtration system.
- Salt spray has a corrosive effect on metals. Electronic and electrical components are precision products, which are particularly sensitive to corrosion. Slight corrosion may cause electrical equipment to fail. In addition, the deposition of salt spray on the metal surface will make the metal surface easy to absorb moisture and condensation, causing electrical products to creep or short circuit, and in serious cases, it may cause major safety accidents such as fire.
- the first technical problem to be solved by the present invention is to provide a long-term maintenance-free salt mist filtration system, which has high filtration and absorption efficiency for salt mist and a long maintenance-free period.
- the second technical problem to be solved by the present invention is to provide a control method of the above-mentioned long-term maintenance-free salt mist filter system, which can better extend the maintenance-free period.
- the third technical problem to be solved by the present invention is to provide a method for screening the concentration of the salt mist absorbing liquid used in the above system.
- the concentration of the salt mist absorbing liquid is adjusted according to the temperature and humidity of the use environment. This method can prolong the use time of the absorbing liquid. At the same time, the maintenance-free period is extended.
- a long-acting maintenance-free salt mist filtration system which includes a housing, a fan and a controller.
- the housing is provided with an air inlet and an air outlet, and a filter channel connecting the air inlet and the air outlet is provided in the housing. Its characteristics are It is: in the filter channel from the air inlet to the air outlet, there are a primary filter module for filtering dust and large particle pollutants in the air, a long-term chemical filter module for filtering salt mist in the air, and a filter module for filtering.
- the high-efficiency filter module and fan for the remaining tiny salt mist particles in the front stage the long-term chemical filter module absorbs and filters the salt mist through the salt mist absorption liquid circulating by the water pump, and the controller controls the water pump and the fan to turn on and off alternately; make the salt mist
- the long-acting chemical filter module includes a filter water curtain that can be wetted by the salt mist absorption liquid, and under the filter water curtain is provided for receiving the salt mist absorbing liquid dripping from the filter water curtain and at the same time for containing the salt mist absorption
- Above the filter water curtain is provided with a spray box for spraying salt mist absorption liquid to the filter water curtain.
- the water pump is used to store the liquid. The salt mist absorption liquid in the tank is transported to the spray box.
- a mixed solution of glycerol and water is used as the salt mist absorbing liquid.
- the mixed solution has the characteristics of stable performance, moisture absorption, resistance to volatilization and decomposition, ability to absorb salt mist in the air, mutual solubility with water, and easy cleaning.
- the concentration of the salt mist absorbing liquid is set according to the environmental temperature and humidity. It is mainly because the selected mixed solution has a high water absorption when the concentration is high, and when the concentration is low, the water vapor is easy to volatilize during the operation of the fan. The filter water curtain dries out and becomes useless.
- the spray hole is a cone-shaped spray hole with a large diameter at the upper end and a small diameter at the lower end.
- the tapered hole can prevent the salt mist absorbing liquid from forming a film on the upper port of the hole, blocking the outflow of the salt mist absorbing liquid. Under the action of the liquid pressure, the salt mist absorbing liquid can more easily pass through the tapered hole, which is convenient for making the salt mist absorbing liquid sufficient and effective. Quickly wet the filter water curtain.
- the size of the spray hole of the filter water curtain is adjusted so that the spray speed of the cone-shaped spray hole is equivalent to the flow rate of the water pump.
- a gauze buffer layer is provided between the spray box and the filter water curtain.
- the gauze buffer layer can prevent the liquid from splashing to other parts of the system during the downflow process, can reduce the loss of solution, and it can keep the internal clean.
- the filter water curtain is a honeycomb water curtain, and its material is wet curtain paper. It is made of wet curtain paper material, which is easy to infiltrate, washable, not easy to deform, and can be reused many times.
- the honeycomb structure is an oblique honeycomb structure that moves obliquely downwards, which increases the effective filtration area of the salt mist absorption and at the same time provides sufficient absorption and dissolution time, reducing the salt mist to pass through the filter module directly to reach the next The odds of the layer.
- the high-efficiency filter module is a progressive super-hydrophobic fiber filter module, which has the characteristics of large capacity, strong adsorption capacity, and good filtering effect. It can be used to filter the small size of the previous long-term chemical filter module. The salt spray particles are further filtered.
- the long-acting maintenance-free salt mist filtration system also includes a first pressure difference sensor for measuring the pressure difference between the two ends of the primary filter module and a second pressure sensor for measuring the pressure difference between the two ends of the high efficiency filter module.
- a pressure difference sensor and a second pressure difference sensor are respectively electrically connected with the controller. The first pressure difference sensor and the second pressure difference sensor are used to realize real-time monitoring of the measuring primary filter module and the high efficiency filter module. Once a failure occurs, an alarm can be issued.
- the standing time is the time required for the test spray box salt mist absorption liquid to flow completely; to ensure The excess solution on the water curtain falls into the storage tank, and the set standing time can also be set to 120% of the time required for complete flow;
- S3 Turn on the fan, air enters from the air inlet, blows out from the air outlet after passing through the primary filter module, long-term chemical filter module, and high-efficiency filter module.
- the fan is set according to the drying of the salt mist absorption liquid on the filter water curtain Working time, turn off the fan; set at least 80% of the time for the selected salt mist absorbing liquid to completely dry in the working environment as the fan working time;
- the present invention has the following beneficial effects:
- the invention has a simple structure and no need to design and install separately. In a space where salt mist filtration is required, if fresh air is introduced, the invention can be installed at the air inlet. If the space is relatively closed, the invention can be directly placed in the space. Inside. The volume of the invention can be small, and the cost of manufacturing and maintenance is low.
- the long-acting chemical filter module of the present invention is developed based on the characteristics of salt spray. Through the circulating salt spray absorbing liquid, the effective and rapid absorption and dissolution of solid salt spray particles and small liquid salt spray droplets in the air can be realized. When time is not maintained, maintain efficient filtration and absorption of salt mist.
- the invention combines the primary-effect filter module, the long-act The fog density is controlled to a level comparable to that of the inland.
- the invention has a long maintenance-free period. Because of the addition of long-acting chemical filter modules, the total amount of salt mist that can be absorbed by the invention is hundreds of times that of the original system with only primary filter modules and high-efficiency filter modules. And after the air passes through the middle long-term chemical filter module, it can effectively extend the life of the high-efficiency filter module.
- the invention can effectively control the service environment of electrical products in the marine environment, can better reduce the dependence of electrical products on high-protection marine special-purpose electrical products in the marine environment, and effectively reduce the manufacturing cost and operation and maintenance of electronic and electrical products in the marine environment cost.
- the method of use of the present invention is to repeatedly moisten the filter water curtain and then turn on the fan, because the spray box sprays the salt mist absorption liquid on the filter water curtain during the process of wetting the filter water curtain, the salt mist absorption liquid is flowing At this time, the salt mist absorbing liquid is easy to volatilize quickly in the flowing air, and the flowing air will also blow the flowing salt mist absorbing liquid to the outside, causing the loss of the salt mist absorbing liquid. It can be seen that the use method of the present invention can make the use time of the quantitative salt mist absorption liquid longer, which also prolongs the maintenance-free period. Because the time for wetting the filter water curtain is short, and the wet filter water curtain can maintain effective absorption of salt mist for a long time, so repeatedly moistening the filter water curtain and then turning on the fan will not affect the use.
- the salt mist absorbing liquid and its concentration in the present invention need to be adjusted according to the temperature and humidity of the use environment. After the solution formula is determined, the spray hole size needs to be adjusted according to the viscosity of the absorbing liquid to ensure the spray speed and pump flow rate when the pump is turned on. quite. According to the confirmed solution formula, the wetting time of the filter water curtain is controlled to turn on the fan and the water pump, and the filter use time is scientifically and rationally extended. When the mixed solution and concentration of glycerol and water of the present invention are selected as the salt mist absorption liquid, the effect of using the control method of the present invention will be better, and the continuous filtration time will be longer.
- Figure 1 is a schematic diagram of the structure of the present invention
- FIG. 2 is a schematic diagram of the structure of the long-acting chemical filtration module of the present invention.
- FIG. 3 is a schematic structural view of the spray box and the gauze buffer layer of the long-acting chemical filter module of the present invention when they are separated;
- FIG. 4 is a schematic cross-sectional view of the spray box of the long-acting chemical filter module of the present invention.
- Figure 5 is a flow chart of the method of use of the present invention.
- 1-Initial filter module 2-Long-acting chemical filter module; 21-Filter water curtain; 22-Spray box; 221-Spray hole; 23-Liquid tank; 24-Water pump; 25-Gauze buffer layer ; 3-High efficiency filter module; 4-fan; 5-shell; 51-air inlet; 52-air outlet; 53-filter channel; 6-first differential pressure sensor; 7-second pressure sensor.
- a long-term maintenance-free salt spray filter system includes a housing 5 and a controller.
- the housing 5 is provided with an air inlet 51 and an air outlet 52, and a communicating inlet is provided in the housing 5.
- the filter channel 53 from the air inlet 51 to the air outlet 52 there are an initial filter module 1, a long-acting chemical filter module 2, a high-efficiency filter module 3 and a fan 4, so that the air containing salt mist passes through the initial effect in turn.
- the filter module, the long-term chemical filter module and the high-efficiency filter module realize three-stage combined filtration, so that the salt mist filtration effect can reach more than 98%.
- the above-mentioned primary-effect filter module 1 should be selected to meet the standard of G4 or above primary-effect filter standards of the EN779 standard, and the primary-effect filter module 1 is used to filter dust and larger particle pollutants.
- High-efficiency filter module 3 uses high-efficiency filter standards of F9 or higher that meet the EN779 standard.
- High-efficiency filter module 3 is a progressive super-hydrophobic fiber filter module that can better absorb and filter differently through progressive filtration.
- the size of the salt spray particles filter down the last remaining tiny salt spray particles.
- the progressive superhydrophobic fiber filter module does not absorb water, so water cannot adhere to it.
- the progressive superhydrophobic fiber filter module has large capacity and adsorption capacity. Strong, good filtering effect and other characteristics.
- the long-acting chemical filter module 2 includes a filter water curtain 21, a water pump 24, a spray box 22 and a liquid storage tank 23.
- the liquid storage tank 23 contains salt mist absorption liquid.
- 23 is installed under the filter water curtain 21 to contain the salt mist absorbing liquid and to receive the salt mist absorbing liquid dripping from the filter water curtain 21.
- a number of spray holes 221 are distributed on the lower surface of the spray box 22. The spray holes 221 communicate with the inside of the spray box 22.
- the spray box 22 is installed above the filter water curtain 21 for spraying to the filter water curtain 21 Salt mist absorption liquid.
- the liquid inlet end of the water pump 24 is connected with a liquid inlet pipe, which extends into the liquid storage tank 23, the liquid outlet end of the water pump 24 is connected with a liquid outlet pipe, and the liquid outlet pipe is connected with the spray box 22.
- the water pump 24 is used to The salt mist absorption liquid in the liquid storage tank 23 is transported to the spray box 22.
- the control end of the water pump 24 and the control end of the fan 4 are respectively electrically connected to the controller, and the switch of the water pump 24 and the fan 4 can be controlled by the controller.
- the controller in this embodiment can be a commonly used PLC controller.
- the outer frame of the long-term chemical filter module is made of PVC material, which has the characteristics of corrosion resistance, light weight, and strong structure.
- the above-mentioned salt spray absorbing liquid for absorbing salt spray needs to have the characteristics of good chemical stability, not easy to decompose and volatilize, and good salt spray absorption capacity.
- the concentration of the salt mist absorption liquid is set according to the environmental temperature and humidity to achieve the best absorption effect.
- the salt mist absorbing liquid in this embodiment is a mixed solution of glycerol and water, which has the characteristics of stable performance, moisture absorption, resistance to volatilization and decomposition, ability to absorb salt mist in the air, mutual solubility with water, and easy cleaning.
- Other salt mist absorbents with similar properties can also be used.
- the following screening methods can be used to screen out the preferred concentration.
- screening a mixed solution of glycerol and water with a preferred concentration includes the following steps:
- S1 Configure a mixed solution of glycerol and water with a concentration of 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%;
- S3 Place the material block in the experimental space.
- the temperature and humidity of the experimental space are maintained at the temperature and humidity set in the specific use environment.
- the temperature and humidity set in this embodiment are 20°C and the humidity is 80%.
- the time in the experimental space reaches the predetermined test period (3 days)
- the material blocks of each group are weighed separately, and the weights of the material blocks of each group are averaged to obtain the corresponding experimental weight m2 of each group;
- the spray hole 221 is provided in this embodiment It is a tapered hole with a large diameter at the upper end and a small diameter at the lower end.
- the salt mist absorbing liquid can better flow out from the spray hole 221 under liquid pressure.
- the tapered hole can prevent the formation of a film on the upper port of the hole and block the salt mist absorbing liquid. It can be seen that the tapered spray hole 221 allows the salt mist absorption liquid to flow out from the spray box 22 more smoothly and faster, and can also wet the filter water curtain 21 faster.
- each spray hole adjusts the spray hole diameter according to the viscosity concentration of the selected solution.
- 70% glycerol aqueous solution is used.
- the diameter of each spray hole is set to 3mm, which can make the spray speed equal to the pump flow rate when the pump is turned on. .
- this embodiment is provided with a gauze buffer layer 25 between the spray box 22 and the filter water curtain 21.
- the gauze buffer layer 25 has a buffering effect and can prevent the liquid from splashing to other parts of the system during the downstream process. Reduce the loss of solution, and it can keep the internal clean.
- the filter water curtain 21 in this embodiment is a honeycomb water curtain, and its material is a wet curtain paper material that has undergone a single-piece curing industry.
- the material is easy to wet, washable, not easy to deform, and can be reused many times.
- the structure of the filter water curtain It is the oblique honeycomb structure with the opening obliquely downward, which greatly increases the filtering area of the salt mist, and the oblique honeycomb structure with the oblique downward tendency is more conducive to absorbing the salt mist and effectively reducing the salt mist entering through the pores. Probability of the next level.
- the long-acting maintenance-free salt mist filtration system of this embodiment also includes a first pressure difference sensor 5 and a second pressure sensor 7.
- the first pressure difference sensor 6 and the second pressure sensor 7 respectively correspond to the measurement of the primary effect filter module 1 and the high efficiency
- the filter module 3 is installed, the first pressure difference sensor 6 is used to measure the pressure difference between the two ends of the primary filter module 1, and the second pressure sensor 7 is used to measure the pressure difference between the two ends of the high efficiency filter module 3.
- the first pressure difference sensor 6 and the second pressure difference sensor 7 are respectively electrically connected to the controller.
- the controller receives the signals sent by the first pressure difference sensor 6 and the second pressure difference sensor 7, and can realize automatic alarm. When the value is higher than the set value, an alarm can be issued through the controller to remind the staff to check and repair.
- FIG. 5 shows the control method of the long-acting maintenance-free salt mist filtration system of this embodiment, which includes the following steps:
- the standing time is the time required for the test spray box salt mist absorption liquid to flow completely; Make sure that all the excess solution on the water curtain falls into the storage tank, and the standing time can be set to 120% of the time required for complete flow.
- the liquid storage tank 23 of this embodiment selects a tank with a capacity of 2 liters.
- the present invention has been effectively used in a relatively closed space and the maintenance-free period can reach more than 3 years.
- the space where fresh air needs to be introduced the present invention has been effectively used and the maintenance-free period can reach more than 1 year.
- the size of the storage tank can also be selected according to the length of the maintenance-free period required to ensure that more solutions can be stored to achieve a longer-term maintenance-free effect.
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Abstract
一种长效免维护盐雾过滤系统及控制方法,其包括壳体(5)、风机(4)和控制器,在壳体(5)过滤通道内依次设有用于过滤空气中灰尘和大颗粒污染物的初效过滤模组(1)、用于过滤空气中盐雾的长效化学过滤模组(2)、用于过滤前级残留的微小盐雾颗粒的高效过滤模组(3),长效化学过滤模组(2)通过水泵(24)循环的盐雾吸收液过滤盐雾,控制器控制水泵(24)和风机(4)交替开启和关闭,使含盐雾的空气依次经初效过滤模组(1)、长效化学过滤模组(2)和高效过滤模组(3),实现三级组合过滤。过滤系统对盐雾的过滤吸收效率高,且免维护的周期长。
Description
本发明涉及一种长效免维护盐雾过滤系统及控制方法,也还涉及一种对长效免维护盐雾过滤系统中的盐雾吸收液浓度的筛选方法。
沿海及海洋环境下,由于海水激烈扰动,风浪破碎,海浪拍岸等产生大量泡沫、气泡,气泡破裂时会生成微小的水滴,海水滴中大部分因重力作用而降落,小部分会随涡动扩散,保持平衡的状态分布于海面上,它们随气流升入空中,经裂解、蒸发等过程演变成弥散状态。当湿度达到一定程度时,盐雾颗粒会发生潮解,盐雾颗粒会从固态变为液态。随着环境条件的不断变化,盐雾颗粒会不断从一种状态变为另一种状态。
盐雾对金属有腐蚀作用,电子电器元件等属于精密产品,对腐蚀尤为敏感,轻微腐蚀即有可能导致电器设备失效。此外,盐雾沉积在金属表面,会使金属表面易吸潮凝露,导致电气产品爬电或者短路,严重时会引起火灾等重大安全事故。
现有盐雾过滤产品存在成本高、耗材更换频繁、维护周期短、无法长期保障过滤效率。
发明内容
本发明所要解决的第一个技术问题,就是提供一种长效免维护盐雾过滤系统,其对盐雾的过滤吸收效率高,且免维护的周期长。
本发明所要解决的第二个技术问题,就是提供一种上述的长效免维护盐雾过滤系统的控制方法,该方法能更好的延长免维护周期。
本发明所要解决的第三个技术问题,就是提供一种上述系统中使用的盐雾吸收液浓度的筛选方法,根据使用环境温湿度调整盐雾吸收液浓度,该方法能延长吸收液使用时间,同时延长免维护周期。
解决上述第一个技术问题,本发明采用的技术方案如下:
一种长效免维护盐雾过滤系统,其包括壳体、风机和控制器,在壳体上设有进风口和出风口,在壳体内设有连通进风口和出风口的过滤通道,其特征在 于:在过滤通道内从进风口至出风口依次设有用于过滤空气中灰尘和大颗粒污染物的初效过滤模组、用于过滤空气中盐雾的长效化学过滤模组、用于过滤前级残留的微小盐雾粒的高效过滤模组和风机,长效化学过滤模组通过水泵循环的盐雾吸收液吸过滤盐雾,控制器控制水泵和风机交替开启和关闭;使含盐雾的空气依次流经初效过滤模组、长效化学过滤模组和高效过滤模组,实现三级组合过滤。
进一步的,长效化学过滤模组包括可经盐雾吸收液湿润的过滤水帘,在过滤水帘下方设有用于承接从过滤水帘上滴下的盐雾吸收液和同时用于盛装盐雾吸收液的储液箱,在过滤水帘的上方设有用于向过滤水帘喷淋盐雾吸收液的喷淋盒,在喷淋盒的下表面分布有若干喷淋孔,水泵用于将储液箱中的盐雾吸收液输送至喷淋盒中。
优先的,盐雾吸收液选用丙三醇与水的混合溶液,该混合溶液具有性能稳定、能吸潮、不易挥发与分解、可以吸收空气中的盐雾、与水互溶、利于清洗等特点。盐雾吸收液的浓度根据环境温、湿度而设定,主要是由于所选混合溶液浓度较高时,吸水性较强,而浓度较低时,在风机运行过程中,水气易挥发,导致过滤水帘变干从而失去作用。
进一步的,喷淋孔为上端直径大、下端直径小的锥形喷淋孔。锥形孔能避免盐雾吸收液在孔的上端口形成薄膜,阻挡盐雾吸收液的流出,在液体压力作用下盐雾吸收液能更容易通过锥形孔,便于使盐雾吸收液充分、迅速润湿过滤水帘。另外,依据所用盐雾吸收液的浓度,来调整过滤水帘喷淋孔大小,使得锥形喷淋孔的喷淋速度与水泵流速相当。
进一步的,在喷淋盒与过滤水帘之间设有纱布缓冲层。纱布缓冲层能阻止液体在下流过程中溅到系统其他部位,能减少溶液流失,且其能保持内部清洁的作用。
进一步的,过滤水帘为蜂窝状水帘,其材质为湿帘纸。采用湿帘纸材料制备,易浸润、耐水洗,不易变形,可重复多次利用。其中,蜂窝状结构为斜向下走势的斜方蜂窝状结构,增大了盐雾吸收有效过滤面积的同时,还提供了充分的吸收溶解时间,减小盐雾直通过滤模组,到达下一层的几率。
进一步的,高效过滤模组为渐进式超疏水性纤维过滤模组,其具有容量大, 吸附能力强,过滤效果好等特点,可对前级长效化学过滤模组过滤后遗漏的较小尺寸的盐雾颗粒进一步过滤。
进一步的,长效免维护盐雾过滤系统还包括用于测量初效过滤模组两端的压力差的第一压力差传感器和用于测量高效过滤模组两端的压力差的第二压力传感器,第一压力差传感器和第二压力差传感器分别与控制器电性连接。通过第一压力差传感器和第二压力差传感器实现对测量初效过滤模组和高效过滤模组的实时监控,一旦发生故障,可以发出报警。
解决上述第二个技术问题,本发明采用的技术方案如下:
一种上述的长效免维护盐雾过滤系统的控制方法,其特征在于,包括以下步骤:
S1:开启水泵,通过水泵不断将储液箱内的盐雾吸收液输送至喷淋盒,再由喷淋盒将盐雾吸收液喷淋在过滤水帘上,待喷淋盒盐雾吸收液液面达到平衡不变化时,即盐雾吸收液全部润湿过滤水帘后,关闭水泵,此过程中,风机保持关闭;
S2:水泵关闭后,静置一段时间,待喷淋盒盐中雾吸收液完全流干净后再开风机,静置时间即为测试喷淋盒盐雾吸收液完全流干净所需时间;为了确保水帘上多余溶液落入储液箱,所设置静置时间也可以设为完全流干净所需时间的120%;
S3:开启风机,空气从进风口进入,经初效过滤模组、长效化学过滤模组和高效过滤模组后从出风口吹出,根据过滤水帘上的盐雾吸收液风干情况设定风机工作时长,关闭风机;设定所选盐雾吸收液在工作环境下完全风干时间的至少80%为风机工作时长;
S4:重复进行步骤S1、S2和S3。
解决上述第三个技术问题,本发明采用的技术方案如下:
一种上述的盐雾吸收液浓度的筛选方法,其特征在于,包括以下步骤:
S1:配置多种不同浓度的盐雾吸收液;
S2:对应每一浓度的盐雾吸收液分别分配多块与过滤水帘的材质相同的材料块,在材料块上吸收有对应浓度的盐雾吸收液,吸收相同浓度的盐雾吸收液的材料块分为一组,对每组的材料块分别进行称重,对每组的材料块的重量分 别取平均值,获得每组对应的初始重量m1;
S3:将材料块置于实验空间中,实验空间的温度及湿度保持在与实际使用环境相同的温度及湿度,待材料块位于实验空间中的时间达到预定测试周期时,再次对每组的材料块分别进行称重,对每组的材料块的重量分别取平均值,获得每组对应的实验重量m2;
S4:将对应组的m2与m1相减,获得差值,并将差值取绝对值,获得|Δm|,对比每组对应的|Δm|,其中|Δm|最小的一组为最优浓度的盐雾吸收液。
与现有技术相比,本发明具有以下有益效果:
1、本发明结构简单,无需另行设计安装,在有盐雾过滤需求的空间中,如有新风引入,可将本发明安装在进风口处,如空间相对密闭,可将本发明直接放置在空间内。本发明的体积可制造的较小,制造和维护成本低。
2、本发明的长效化学过滤模组基于盐雾特性开发,通过循环的盐雾吸收液,可实现对空气中固态盐雾颗粒和液态盐雾小液滴的有效快速吸收溶解,能在长时间不维护的情况下,保持对盐雾的高效过滤及吸收。本发明将初效过滤模组、长效化学过滤模组和高效过滤模组相结合使用,显著提高了过滤吸收效率高,盐雾过滤效果可达98%以上,可将海上室内空间环境中盐雾浓度控制到与内陆相当水平。
本发明免维护周期长,因增加了长效化学过滤模组,使本发明所能吸收的盐雾总量是原有的只有初效过滤模组和高效过滤模组的系统的数百倍,且空气经过中间的长效化学过滤模组后,可有效延长高效过滤模组的寿命。
本发明可以有效控制海洋环境下电工产品的服役环境,能更好的减少海洋环境下电工产品对高防护等级的海上专用电工产品的依赖,有效降低海洋环境下电子电器产品的制造成本和运维成本。
3、本发明的使用方法是重复将过滤水帘湿润后再开启风机,因为喷淋盒将盐雾吸收液喷淋在过滤水帘上湿润过滤水帘的过程中,盐雾吸收液是流动的,此时的盐雾吸收液容易在流动的空气中快速挥发,且流动的空气也会将流动的盐雾吸收液往外侧吹出,造成盐雾吸收液的损失。可见,本发明的使用方法能使得定量的盐雾吸收液的使用时间更长,也就延长了免维护周期。由于湿润过滤水帘的时间短,而湿润后的过滤水帘能保持对盐雾进行有效吸收的时间是较 长的,因此重复的将过滤水帘湿润后再开启风机是不影响使用的。
4、本发明中的盐雾吸收液及其浓度需根据使用环境温湿度进行调整,确定溶液配方后,需根据吸收液粘稠度调整喷淋孔大小,保障水泵开启时喷淋速度与水泵流速相当。根据确认溶液配方对过滤水帘的润湿时间控制风机和水泵的开启,科学合理的延长过滤使用时间。选用本发明将丙三醇与水的混合溶液及浓度作为盐雾吸收液时,结合本发明的控制方法使用的效果会更好,持续过滤时间会更长。
图1是本发明的结构示意图;
图2是本发明的长效化学过滤模组的结构示意图;
图3是本发明的长效化学过滤模组的喷淋盒和纱布缓冲层拆分开时的结构示意图;
图4是本发明的长效化学过滤模组的喷淋盒的剖视示意图;
图5是本发明的使用方法的流程图。
图中附图标记含义:
1-初效过滤模组;2-长效化学过滤模组;21-过滤水帘;22-喷淋盒;221-喷淋孔;23-储液箱;24-水泵;25-纱布缓冲层;3-高效过滤模组;4-风机;5-壳体;51-进风口;52-出风口;53-过滤通道;6-第一压力差传感器;7-第二压力传感器。
下面结合实施例对本发明进一步描述。
如图1所示的一种长效免维护盐雾过滤系统,其包括壳体5和控制器,在壳体5上设有进风口51和出风口52,在壳体5内设有连通进风口51和出风口52的过滤通道53。
在过滤通道53内从进风口51至出风口52依次设有初效过滤模组1、长效化学过滤模组2、高效过滤模组3和风机4,使含盐雾的空气依次经初效过滤模组、长效化学过滤模组和高效过滤模组,实现三级组合过滤,使盐雾过滤效果可达98%以上。上述初效过滤模组1选用应符合EN779标准的G4级以上初效过滤器标准,初效过滤模组1用于过滤灰尘和较大颗粒污染物。高效过滤模组3 选用符合EN779标准的F9级以上高效过滤器标准,高效过滤模组3为渐进式超疏水性纤维过滤模组,其通过层层渐进式过滤,能更好的吸附、过滤不同尺寸盐雾微粒,将最后残留的微小盐雾颗粒过滤下来,渐进式超疏水性纤维过滤模组不吸水,因此水分无法附着在上面,渐进式超疏水性纤维过滤模组具有容量大,吸附能力强,过滤效果好等特点。
如图2和如图3所示,长效化学过滤模组2包括过滤水帘21、水泵24、喷淋盒22和储液箱23,储液箱23内盛装盐雾吸收液,储液箱23安装在过滤水帘21的下方,用于盛装盐雾吸收液和承接从过滤水帘21上滴下的盐雾吸收液。喷淋盒22的下表面分布有若干喷淋孔221,喷淋孔221与喷淋盒22的内部连通,喷淋盒22安装在过滤水帘21的上方,用于向过滤水帘21喷淋盐雾吸收液。水泵24的进液端连接有进液管,进液管延伸至储液箱23内,水泵24的出液端连接有出液管,出液管与喷淋盒22连接,水泵24用于将储液箱23中的盐雾吸收液输送至喷淋盒22中。水泵24的控制端和风机4的控制端分别与控制器电性连接,通过控制器可实现对水泵24和风机4的开关的控制。本实施例的控制器可选用常用PLC控制器。长效化学过滤模组的外框为PVC材料,其具有耐腐蚀,重量轻,结构坚固等特点。
上述用于吸收盐雾的盐雾吸收液需要具备化学稳定性好、不易分解与挥发、较好的盐雾吸收能力等特点。盐雾吸收液的浓度根据环境温、湿度而设定,以达到最佳的吸收效果。
本实施例的盐雾吸收液选用丙三醇与水的混合溶液,其具有性能稳定、能吸潮、不易挥发与分解、可以吸收空气中的盐雾、与水互溶、利于清洗等特点。也可选用其他有类同性能的盐雾吸收液,在不同使用环境中,可采用下述筛选方法筛选出优选浓度。
本实施例筛选出优选浓度的丙三醇与水的混合溶液,包括以下步骤:
S1:配置浓度为30%、40%、50%、60%、70%、80%、90%、100%的丙三醇与水的混合溶液;
S2:对应每一浓度的丙三醇与水的混合溶液分别分配三块与过滤水帘的材质相同的材料块,在材料块上分别用胶头滴管滴20滴对应浓度的丙三醇与水的混合溶液,材料块上吸收对应浓度的丙三醇与水的混合溶液,吸收相同浓度的 丙三醇与水的混合溶液的材料块分为一组,对每组的材料块分别进行称重,对每组的材料块的重量分别取平均值,获得每组对应的初始重量m1;
S3:将材料块置于实验空间中,实验空间的温度及湿度保持设定在具体使用环境中的温度及湿度,本实施例设定的温度为20℃、湿度为80%,待材料块位于实验空间中的时间达到预定测试周期(3天)时,再次对每组的材料块分别进行称重,对每组的材料块的重量分别取平均值,获得每组对应的实验重量m2;
S3:将对应组的m2与m1相减,获得差值,并将差值取绝对值,获得|Δm|,|Δm|表示试验温、湿度下,滴加有丙三醇与水的混合溶液的材料块,在试验前和试验后的材料块的质量差的绝对值,当|Δm|=0时,表示该浓度的丙三醇与水的混合溶液在当前试验温度和湿度下达到挥发与吸水平衡,最为稳定,因此,试验组的|Δm|值越接近0越好,因此,可对比每组对应的|Δm|,其中|Δm|最小的一组为最优浓度的丙三醇与水的混合溶液。
本组试验结果如下表1所示,其中,70%浓度的丙三醇水溶液在该温度、湿度下|Δm|值最小,故当前温度和湿度下最佳配方为70%丙三醇水溶液。
表1:不同浓度丙三醇水溶液挥发与吸潮情况表
由于盐雾吸收液具有一定的粘稠性,为了使得喷淋盒22中的盐雾吸收液能更好的从喷淋孔221流出,如图4所示,本实施例将喷淋孔221设置为上端直径大、下端直径小的锥形孔,盐雾吸收液能更好的在液体压力下从喷淋孔221流出,锥形孔能避免在孔的上端口形成薄膜,阻挡盐雾吸收液的流出,可见锥形的喷淋孔221使得盐雾吸收液能更顺畅更快的从喷淋盒22流出,也就能更快的对过滤水帘21进行湿润。同时依据选定溶液的粘稠浓度调整喷淋孔直径,本 实施例筛选用70%丙三醇水溶液,每个喷淋孔的直径设置为3mm,可以使水泵开启时喷淋速度与水泵流速相当。
如图3所示,本实施例在喷淋盒22与过滤水帘21之间设有纱布缓冲层25,纱布缓冲层25具有缓冲作用,能阻止液体在下流过程中溅到系统其他部位,能减少溶液流失,且其能保持内部清洁的作用。
本实施例的过滤水帘21为蜂窝状水帘,其材质为经过单片固化工业的湿帘纸材料,该材料易浸润、耐水洗,不易变形,可重复多次利用,过滤水帘的结构为开口斜向下走势的斜方蜂窝状结构,这一结构大大增加了对盐雾的过滤面积,且斜向下走势的斜方蜂窝状结构更加利于吸收盐雾,有效减少盐雾通过孔隙进入下一层的机率。
本实施例的长效免维护盐雾过滤系统还包括第一压力差传感器5和第二压力传感器7,第一压力差传感器6和第二压力传感器7分别对应测量初效过滤模组1和高效过滤模组3安装,第一压力差传感器6用于测量初效过滤模组1两端的压力差,第二压力传感器7用于测量高效过滤模组3两端的压力差,当压力差高于一定值时可以判断初效过滤模组1或高效过滤模组3需要检修。第一压力差传感器6和第二压力差传感器7分别与控制器电性连接,控制器接收第一压力差传感器6和第二压力差传感器7发出的信号,可实现自动报警,当压力差的值高于设定值时,可通过控制器发出警报,提醒工作人员检修。
如图5所示的流程图显示出了本实施例的长效免维护盐雾过滤系统的控制方法,其包括以下步骤:
S1:开启水泵24,通过水泵24不断将储液箱23内的盐雾吸收液输送至喷淋盒22,再由喷淋盒22将盐雾吸收液喷淋在过滤水帘21上,待喷淋盒盐雾吸收液液面达到平衡不变化时,即盐雾吸收液全部润湿过滤水帘21后,关闭水泵24,此过程中,风机4保持关闭。水帘润湿时间与盐雾吸收液浓度有关,当过滤水帘完全润湿时颜色为深棕色;喷淋过滤水帘21的全部湿润程度的时间即为控制水泵24的工作时长,本实施例筛选的70%丙三醇溶液,在水泵24的工作10分钟后,能对过滤水帘21完全润湿;
S2:水泵关闭后,静置一段时间,待喷淋盒盐中雾吸收液完全流干净后再开风机,通常静置时间即为测试喷淋盒盐雾吸收液完全流干净所需时间;为了 确保水帘上多余溶液全部落入储液箱,静置时间可以设为完全流干净所需时间的120%。
S3:开启风机4,空气从进风口51进入,经初效过滤模组1、长效化学过滤模组2和高效过滤模组3组合过滤后从出风口52吹出,根据过滤水帘21上的盐雾吸收液风干情况,关闭风机4。过滤水帘21上的盐雾吸收液完全风干时过滤水帘为土黄色,将所选盐雾吸收液在工作环境下完全风干时间的至少80%设定为风机工作时长。本实施例筛选的70%丙三醇溶液,风机4的工作时长设为96小时。
S4:重复进行步骤S1、S2和S3。
本实施例的储液箱23选择2升容量的箱体,经现场验证,在保证过滤效率的前提下,对于在相对密闭的空间中,本发明一直有效使用免维护周期可达3年以上,而对于在需引入新风的空间中,本发明一直有效使用免维护周期也可达1年以上。也可根据需要免维护周期长短选择储液箱尺寸,保证可以储存更多的溶液,达到更长期免维护的效果。
本发明的上述实施例并不是对本发明保护范围的限定,本发明的实施方式不限于此,凡此种种根据本发明的上述内容,按照本领域的普通技术知识和惯用手段,在不脱离本发明上述基本技术思想前提下,对本发明上述结构做出的其它多种形式的修改、替换或变更,均应落在本发明的保护范围之内。
Claims (10)
- 一种长效免维护盐雾过滤系统,其包括壳体、风机和控制器,在所述壳体上设有进风口和出风口,在所述壳体内设有连通所述进风口和出风口的过滤通道,其特征在于:在所述过滤通道内从所述进风口至所述出风口依次设有用于过滤空气中灰尘和大颗粒污染物的初效过滤模组、用于过滤空气中盐雾的长效化学过滤模组、用于过滤前级残留的微小盐雾颗粒的高效过滤模组,所述长效化学过滤模组通过水泵循环的盐雾吸收液过滤盐雾,所述控制器控制所述水泵和风机交替开启和关闭,使含盐雾的空气依次经初效过滤模组、长效化学过滤模组和高效过滤模组,实现三级组合过滤。
- 根据权利要求1所述的长效免维护盐雾过滤系统,其特征在于:所述长效化学过滤模组包括经盐雾吸收液湿润的过滤水帘,在所述过滤水帘下方设有用于承接从所述过滤水帘上滴下的盐雾吸收液和同时用于盛装盐雾吸收液的储液箱,在所述过滤水帘的上方设有用于向所述过滤水帘喷淋盐雾吸收液的喷淋盒,在所述喷淋盒的下表面分布有若干喷淋孔,所述水泵用于将所述储液箱中的盐雾吸收液输送至所述喷淋盒中。
- 根据权利要求2所述的长效免维护盐雾过滤系统,其特征在于:所述盐雾吸收液为丙三醇与水的混合溶液。
- 根据权利要求1所述的长效免维护盐雾过滤系统,其特征在于:所述高效过滤模组为渐进式超疏水性纤维过滤模组。
- 根据权利要求2所述的长效免维护盐雾过滤系统,其特征在于:所述喷淋孔为上端直径大、下端直径小的锥形喷淋孔;锥形喷淋孔大小依据所选择的盐雾吸收液的浓度进行调整。
- 根据权利要求2所述的长效免维护盐雾过滤系统,其特征在于:在所述喷淋盒与所述过滤水帘之间设有纱布缓冲层。
- 根据权利要求2所述的长效免维护盐雾过滤系统,其特征在于:所述过滤水帘为蜂窝状水帘,其材质为湿帘纸。
- 根据权利要求1所述的长效免维护盐雾过滤系统,其特征在于:所述长效免维护盐雾过滤系统还包括用于测量所述初效过滤模组两端的压力差的第一压力差传感器和用于测量所述高效过滤模组两端的压力差的第二压力传感器, 所述第一压力差传感器和第二压力差传感器分别与所述控制器电性连接。
- 一种权利要求1至8任意一项所述的长效免维护盐雾过滤系统的控制方法,其特征在于,包括以下步骤:S1:开启所述水泵,通过所述水泵不断将所述储液箱内的盐雾吸收液输送至所述喷淋盒,再由所述喷淋盒将盐雾吸收液喷淋在所述过滤水帘上,待喷淋盒中盐雾吸收液液面达到平衡不变化时,关闭水泵,此过程中,所述风机保持关闭;S2:水泵关闭后,静置一段时间,待喷淋盒盐雾吸收液完全流干净后再开风机;S3:开启所述风机,空气从所述进风口进入,经所述初效过滤模组、长效化学过滤模组和高效过滤模组后从所述出风口吹出,根据所述过滤水帘上的盐雾吸收液风干情况设定风机工作时长,关闭所述风机;设定所选盐雾吸收液在工作环境下完全风干时间的至少80%为风机工作时长;S4:重复进行步骤S1、S2和S3。
- 一种权利要求1或9中所述盐雾吸收液的浓度筛选方法,其特征在于,包括以下步骤:S1:配置多种不同浓度的盐雾吸收液;S2:对应每一浓度的盐雾吸收液分别分配多块与过滤水帘的材质相同的材料块,在所述材料块上吸收有对应浓度的盐雾吸收液,吸收相同浓度的盐雾吸收液的材料块分为一组,对每组的所述材料块分别进行称重,对每组的所述材料块的重量分别取平均值,获得每组对应的初始重量m1;S3:将所述材料块置于实验空间中,实验空间的温度及湿度设定保持在与实际使用环境相同的温度及湿度,待所述材料块位于所述实验空间中的时间达到预定测试周期时,再次对每组的所述材料块分别进行称重,对每组的所述材料块的重量分别取平均值,获得每组对应的实验重量m2;S4:将对应组的m2与m1相减,获得差值,并将差值取绝对值,获得|Δm|,对比每组对应的|Δm|,其中|Δm|最小的一组为筛选浓度的盐雾吸收液。
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