CN111644003B - Long-acting maintenance-free salt mist filtering system and control method - Google Patents
Long-acting maintenance-free salt mist filtering system and control method Download PDFInfo
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- CN111644003B CN111644003B CN202010324396.0A CN202010324396A CN111644003B CN 111644003 B CN111644003 B CN 111644003B CN 202010324396 A CN202010324396 A CN 202010324396A CN 111644003 B CN111644003 B CN 111644003B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
The invention discloses a long-acting maintenance-free salt mist filtering system and a control method, which comprise a shell, a fan and a controller, wherein a primary filtering module for filtering dust and large-particle pollutants in air, a long-acting chemical filtering module for filtering salt mist in air and a high-efficiency filtering module for filtering residual micro salt mist particles at a preceding stage are sequentially arranged in a filtering channel of the shell, the long-acting chemical filtering module filters the salt mist through salt mist absorption liquid circulated by a water pump, and the controller controls the water pump and the fan to be alternately opened and closed so that the air containing the salt mist sequentially passes through the primary filtering module, the long-acting chemical filtering module and the high-efficiency filtering module to realize three-stage combined filtering. The filtering system has high efficiency of filtering and absorbing salt fog and long maintenance-free period.
Description
Technical Field
The invention relates to a long-acting maintenance-free salt mist filtering system and a control method, and also relates to a screening method for the concentration of a salt mist absorption liquid in the long-acting maintenance-free salt mist filtering system.
Background
Under coastal and marine environments, a large amount of foam and bubbles are generated due to the violent disturbance of seawater, the breakage of wind waves, the bank beating of sea waves and the like, tiny water drops can be generated when the bubbles are broken, most of the sea water drops fall under the action of gravity, and a small part of the sea water drops can be dispersed along with vortex motion, so that the sea water drops are distributed on the sea surface in a balanced state, and the sea water drops are lifted into the air along with airflow and are developed into a dispersed state through the processes of cracking, evaporation and the like. When the humidity reaches a certain level, the salt spray particles can be deliquesced and can change from a solid state to a liquid state. As environmental conditions change, salt spray particles change from one state to another.
The salt fog has a corrosion effect on metal, electronic and electrical components and the like belong to precise products, and are particularly sensitive to corrosion, and slight corrosion can cause failure of electrical equipment. In addition, salt mist is deposited on the metal surface, so that the metal surface is easy to absorb moisture and condense, the creepage or short circuit of an electrical product is caused, and serious safety accidents such as fire disasters and the like can be caused in serious cases.
The existing salt mist filtering product has the defects of high cost, frequent consumable replacement, short maintenance period and incapability of guaranteeing the filtering efficiency for a long time.
Disclosure of Invention
The invention aims to solve the first technical problem of providing a long-acting maintenance-free salt mist filtering system which has high salt mist filtering and absorbing efficiency and long maintenance-free period.
The second technical problem to be solved by the present invention is to provide a control method for the long-acting maintenance-free salt mist filtering system, which can better prolong the maintenance-free period.
The third technical problem to be solved by the invention is to provide a method for screening the concentration of the salt spray absorption liquid used in the system, wherein the concentration of the salt spray absorption liquid is adjusted according to the temperature and the humidity of the use environment, and the method can scientifically and reasonably prolong the use time of the absorption liquid and simultaneously prolong the maintenance-free period.
To solve the first technical problem, the technical scheme adopted by the invention is as follows:
the utility model provides a long-term non-maintaining salt fog filtration system, its includes casing, fan and controller, is equipped with air intake and air outlet on the casing, is equipped with the filtration passageway of intercommunication air intake and air outlet in the casing, its characterized in that: a primary filtering module for filtering dust and large-particle pollutants in the air, a long-acting chemical filtering module for filtering salt mist in the air, a high-efficiency filtering module for filtering residual micro salt mist particles in a preceding stage and a fan are sequentially arranged in the filtering channel from the air inlet to the air outlet, the long-acting chemical filtering module absorbs and filters the salt mist through salt mist absorption liquid circulated by a water pump, and the water pump and the fan are controlled by a controller to be alternately opened and closed; make the air that contains the salt fog flow through in proper order and filter module, long-term chemical filter module and high-efficient filter module, realize tertiary combination filtration.
Furthermore, the long-acting chemical filtration module comprises a filtration water curtain which can be wetted by salt spray absorption liquid, a liquid storage tank which is used for receiving the salt spray absorption liquid dropping from the filtration water curtain and is used for containing the salt spray absorption liquid is arranged below the filtration water curtain, a spraying box which is used for spraying the salt spray absorption liquid to the filtration water curtain is arranged above the filtration water curtain, a plurality of spraying holes are distributed on the lower surface of the spraying box, and a water pump is used for conveying the salt spray absorption liquid in the liquid storage tank to the spraying box.
Preferably, the salt spray absorption liquid is a mixed solution of glycerol and water, and the mixed solution has the characteristics of stable performance, moisture absorption, difficult volatilization and decomposition, capability of absorbing salt spray in air, mutual solubility with water, convenience for cleaning and the like. The concentration of the salt spray absorption liquid is set according to the temperature and the humidity of the environment, and the salt spray absorption liquid is mainly characterized in that when the concentration of the selected mixed solution is higher, the water absorption is stronger, and when the concentration is lower, water vapor is volatile in the running process of a fan, so that a filtering water curtain is dried and loses effect.
Furthermore, the spraying holes are conical spraying holes with large upper end diameter and small lower end diameter. The bell mouth can avoid salt fog absorption liquid to form the film at the last port in hole, blocks the outflow of salt fog absorption liquid, and salt fog absorption liquid can pass through the bell mouth more easily under the liquid pressure effect, is convenient for make salt fog absorption liquid abundant, wet the filtration cascade rapidly. In addition, the size of the spray holes of the filtering water curtain is adjusted according to the concentration of the used salt mist absorption liquid, so that the spray speed of the conical spray holes is equivalent to the flow rate of the water pump.
Furthermore, a gauze buffer layer is arranged between the spraying box and the filtering water curtain. The gauze buffer layer can prevent liquid from splashing to other parts of the system in the down-flow process, can reduce the loss of the solution, and can keep the internal cleanness.
Furthermore, the filtering water curtain is a honeycomb water curtain made of wet curtain paper. The wet curtain paper is prepared from the wet curtain paper material, is easy to soak and wash, is not easy to deform and can be repeatedly used. The honeycomb structure is an oblique square honeycomb structure which runs obliquely downwards, so that the salt mist absorption effective filtering area is increased, meanwhile, sufficient absorption and dissolution time is provided, and the probability that the salt mist directly passes through the filtering module and reaches the next layer is reduced.
Furthermore, the high-efficient module of filtering is progressive super hydrophobicity fibre and filters the module, and it has capacious, and adsorption efficiency is strong, characteristics such as filter effect are good, can further filter the salt fog granule of the less size that the long-term chemical filtration module of preceding stage left out after filtering.
Further, long-term non-maintaining salt fog filtration system still includes the first pressure difference sensor that is used for measuring the pressure differential at first effect filtration module both ends and is used for measuring the second pressure sensor of the pressure differential at high-efficient filtration module both ends, and first pressure difference sensor and second pressure difference sensor respectively with controller electric connection. Realize filtering module and high-efficient real time monitoring who filters the module to measuring the primary effect through first pressure difference sensor and second pressure difference sensor, in case break down, can send the warning.
To solve the second technical problem, the technical solution adopted by the present invention is as follows:
the control method of the long-acting maintenance-free salt mist filtering system is characterized by comprising the following steps of:
s1: starting a water pump, continuously conveying the salt spray absorption liquid in the liquid storage tank to a spraying box through the water pump, spraying the salt spray absorption liquid on the filtering water curtain through the spraying box, and closing the water pump after the salt spray absorption liquid of the spraying box is balanced and unchanged, namely the salt spray absorption liquid completely wets the filtering water curtain, wherein in the process, the fan is kept closed;
s2: after the water pump is closed, standing for a period of time, starting the fan after the salt mist absorption liquid in the spraying box completely flows out, wherein the standing time is the time required for testing the complete flow-out of the salt mist absorption liquid in the spraying box; in order to ensure that the redundant solution on the water curtain falls into the liquid storage tank, the set standing time can also be set to be 120% of the time required for complete draining;
s3: starting a fan, allowing air to enter from an air inlet, blowing out from an air outlet after passing through a primary filtering module, a long-acting chemical filtering module and a high-efficiency filtering module, setting the working time of the fan according to the air drying condition of salt spray absorption liquid on a filtering water curtain, and closing the fan; setting at least 80% of the complete air drying time of the selected salt spray absorption liquid in the working environment as the working time of the fan;
s4: steps S1, S2, and S3 are repeated.
To solve the third technical problem, the technical solution adopted by the present invention is as follows:
the method for screening the concentration of the salt spray absorption liquid is characterized by comprising the following steps of:
s1: preparing a plurality of salt mist absorption liquids with different concentrations;
s2: distributing a plurality of material blocks which are made of the same material as the filtering water curtain respectively corresponding to the salt spray absorption liquid with each concentration, absorbing the salt spray absorption liquid with the corresponding concentration on the material blocks, dividing the material blocks which absorb the salt spray absorption liquid with the same concentration into a group, weighing the material blocks of each group respectively, and averaging the weight of the material blocks of each group respectively to obtain the initial weight m1 corresponding to each group;
s3: placing the material blocks in an experimental space, keeping the temperature and the humidity of the experimental space at the same temperature and humidity as those of an actual use environment, weighing the material blocks of each group again when the time that the material blocks are located in the experimental space reaches a preset test period, and averaging the weights of the material blocks of each group respectively to obtain an experimental weight m2 corresponding to each group;
s4: and subtracting m1 from m2 of the corresponding group to obtain a difference value, taking the absolute value of the difference value to obtain | Δ m |, and comparing the | Δ m |, corresponding to each group, wherein the group with the smallest | Δ m | is the salt spray absorption liquid with the optimal concentration.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention has simple structure, does not need to be additionally designed and installed, can be installed at the air inlet if fresh air is introduced into the space with salt mist filtering requirements, and can be directly placed in the space if the space is relatively closed. The invention has the advantages of small volume, low manufacturing and maintenance cost.
2. The long-acting chemical filtering module is developed based on the salt spray characteristic, can effectively and quickly absorb and dissolve solid salt spray particles and liquid salt spray small drops in the air through circulating salt spray absorption liquid, and can keep efficient filtering and absorption of the salt spray under the condition of no maintenance for a long time. According to the invention, the primary filtering module, the long-acting chemical filtering module and the high-efficiency filtering module are combined for use, so that the filtering and absorbing efficiency is remarkably improved, the salt mist filtering effect can reach more than 98%, and the salt mist concentration in the indoor space environment of the sea can be controlled to be equivalent to the inland level.
The maintenance-free high-efficiency salt spray filtering system has long maintenance-free period, the total amount of salt spray absorbed by the high-efficiency salt spray filtering system is hundreds of times of that of the original system only comprising the primary filtering module and the high-efficiency filtering module due to the addition of the long-acting chemical filtering module, and the service life of the high-efficiency filtering module can be effectively prolonged after air passes through the middle long-acting chemical filtering module.
The invention can effectively control the service environment of the electrical product in the marine environment, can better reduce the dependence of the electrical product in the marine environment on the marine special electrical product with high protection level, and effectively reduce the manufacturing cost and the operation and maintenance cost of the electronic and electric products in the marine environment.
3. The use method of the invention is to repeatedly moisten the filtering water curtain and then start the fan, because the salt fog absorption liquid flows when the spraying box sprays the salt fog absorption liquid on the filtering water curtain to moisten the filtering water curtain, at the moment, the salt fog absorption liquid is easy to volatilize quickly in flowing air, and the flowing air can blow the flowing salt fog absorption liquid to the outer side, thus causing the loss of the salt fog absorption liquid. Therefore, the use method of the invention can prolong the service time of the quantitative salt mist absorption liquid, and prolong the maintenance-free period. Because the time for wetting the filtering water curtain is short, and the time for effectively absorbing the salt spray by the wetted filtering water curtain is long, the use is not influenced by repeatedly wetting the filtering water curtain and then starting the fan.
4. The salt spray absorption liquid and the concentration thereof in the invention need to be adjusted according to the temperature and humidity of the use environment, and after the solution formula is determined, the size of the spray holes needs to be adjusted according to the viscosity of the absorption liquid, so that the spray speed is equal to the flow speed of the water pump when the water pump is started. The opening of the fan and the water pump is controlled according to the wetting time of the solution formula to the filtering water curtain, so that the filtering service time is scientifically and reasonably prolonged. When the mixed solution of glycerol and water and the concentration of the mixed solution are used as the salt spray absorption liquid, the effect of the salt spray absorption liquid used by combining the control method of the invention is better, and the continuous filtration time is longer.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a long-term chemical filtration module according to the present invention;
FIG. 3 is a schematic view of the spray box and gauze buffer layer of the extended chemical filtration module of the present invention shown disassembled;
FIG. 4 is a schematic cross-sectional view of a spray box of the long-life chemical filtration module of the present invention;
fig. 5 is a flow chart of a method of use of the present invention.
The reference numerals in the drawings mean:
1-a primary filtering module; 2-long-acting chemical filtering module; 21-filtering the water curtain; 22-a spray box; 221-spray holes; 23-a liquid storage tank; 24-a water pump; 25-a gauze buffer layer; 3-a high-efficiency filtering module; 4-a fan; 5-a shell; 51-an air inlet; 52-air outlet; 53-filtration channel; 6-a first differential pressure sensor; 7-second pressure sensor.
Detailed Description
The invention is further described below with reference to examples.
Fig. 1 shows a long-acting maintenance-free salt mist filtering system, which includes a housing 5 and a controller, wherein an air inlet 51 and an air outlet 52 are provided on the housing 5, and a filtering channel 53 communicating the air inlet 51 and the air outlet 52 is provided in the housing 5.
It filters module 1, long-term chemical filtration module 2, high-efficient filtration module 3 and fan 4 to be equipped with in proper order from air intake 51 to air outlet 52 in filtering passageway 53, makes the air that contains the salt fog filter module, long-term chemical filtration module and high-efficient filtration module through just imitating in proper order, realizes tertiary combination filtration, makes the salt fog filter effect can reach more than 98%. The primary filter module 1 is selected to meet the standard of a primary filter above grade G4 of EN779 standard, and the primary filter module 1 is used for filtering dust and larger particle pollutants. High efficiency filter module 3 chooses for use the high efficiency filter standard more than the F9 level that accords with EN779 standard, high efficiency filter module 3 is the super hydrophobic fiber filter module of gradual, it filters through layer upon layer gradual, can be better absorption, filter different size salt fog particles, filter the last remaining small salt fog granule, the super hydrophobic fiber filter module of gradual does not absorb water, consequently, moisture can't adhere to on it, the super hydrophobic fiber filter module of gradual has capacious, the adsorption efficiency is strong, characteristics such as the filter effect is good.
As shown in fig. 2 and fig. 3, the long-acting chemical filtration module 2 includes a filtration water curtain 21, a water pump 24, a spray box 22 and a liquid storage tank 23, wherein the liquid storage tank 23 contains a salt spray absorption liquid, and the liquid storage tank 23 is installed below the filtration water curtain 21 and is used for containing the salt spray absorption liquid and receiving the salt spray absorption liquid dropping from the filtration water curtain 21. The lower surface of the spraying box 22 is distributed with a plurality of spraying holes 221, the spraying holes 221 are communicated with the inside of the spraying box 22, and the spraying box 22 is installed above the filtering water curtain 21 and is used for spraying the salt fog absorption liquid to the filtering water curtain 21. The feed liquor end of water pump 24 is connected with the feed liquor pipe, and the feed liquor pipe extends to in the liquid reserve tank 23, and the play liquid end of water pump 24 is connected with the drain pipe, and the drain pipe is connected with spraying box 22, and water pump 24 is arranged in carrying the salt fog absorbing liquid in the liquid reserve tank 23 to spraying box 22. The control end of the water pump 24 and the control end of the fan 4 are respectively electrically connected with the controller, and the control of the on-off of the water pump 24 and the fan 4 can be realized through the controller. The controller of the embodiment can be a common PLC controller. The outer frame of the long-acting chemical filtering module is made of PVC material and has the characteristics of corrosion resistance, light weight, firm structure and the like.
The salt spray absorption liquid for absorbing salt spray needs to have the characteristics of good chemical stability, difficult decomposition and volatilization, good salt spray absorption capacity and the like. The concentration of the salt spray absorption liquid is set according to the temperature and the humidity of the environment so as to achieve the optimal absorption effect.
The salt spray absorption liquid of this embodiment selects the mixed solution of glycerine and water for use, and it has stable performance, can absorb moisture, difficult volatile and decompose, can absorb the salt spray in the air, mutually dissolve with water, do benefit to characteristics such as washing. Other salt mist absorption liquid with similar performance can be selected, and the optimal concentration can be screened by adopting the following screening method in different use environments.
This embodiment screens out a mixed solution of glycerol and water with a preferred concentration, and includes the following steps:
s1: preparing a mixed solution of glycerol and water with the concentration of 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100%;
s2: distributing three material blocks which are made of the same material as the filtering water curtain respectively corresponding to the mixed solution of the glycerol and the water with each concentration, dripping 20 drops of the mixed solution of the glycerol and the water with the corresponding concentration on the material blocks respectively by using a rubber head dropper, absorbing the mixed solution of the glycerol and the water with the corresponding concentration on the material blocks, dividing the material blocks which absorb the mixed solution of the glycerol and the water with the same concentration into a group, respectively weighing the material blocks of each group, and respectively averaging the weight of the material blocks of each group to obtain the initial weight m1 corresponding to each group;
s3: placing the material blocks in an experimental space, keeping the temperature and humidity of the experimental space at the temperature and humidity set in a specific use environment, wherein the temperature set in the embodiment is 20 ℃ and the humidity is 80%, when the time that the material blocks are located in the experimental space reaches a preset test period (3 days), respectively weighing the material blocks of each group again, and respectively averaging the weight of the material blocks of each group to obtain an experimental weight m2 corresponding to each group;
s3: subtracting m1 from m2 of the corresponding group to obtain a difference, and taking the absolute value of the difference to obtain | Δ m |, | Δ m | represents the material block to which the mixed solution of glycerol and water is added at the test temperature and humidity, the absolute value of the mass difference between the material blocks before and after the test is the most stable when | Δ m |, is 0, the mixed solution of glycerol and water at the concentration reaches the equilibrium of volatilization and water absorption at the current test temperature and humidity, therefore, the | Δ m | value of the test group is closer to 0, and therefore, the | Δ m | corresponding to each group can be compared, wherein the group with the smallest | Δ m | is the mixed solution of glycerol and water with the optimal concentration.
The results of this set of tests are shown in table 1 below, where 70% concentration glycerol aqueous solution has the smallest | Δ m | value at that temperature and humidity, so the current optimal formulation for temperature and humidity is 70% glycerol aqueous solution.
Table 1: volatilization and moisture absorption condition table for glycerol aqueous solution with different concentrations
Because the salt fog absorbing solution has certain viscidity, in order to make the salt fog absorbing solution in the box 22 that sprays better follow the hole 221 that sprays and flow out, as shown in fig. 4, this embodiment sets up the hole 221 that sprays into the bell mouth that upper end diameter is big, the diameter of lower extreme is little, the salt fog absorbing solution can be better flows out from spraying the hole 221 under liquid pressure, the bell mouth can be avoided forming the film in the last port in hole, block the outflow of salt fog absorbing solution, it makes salt fog absorbing solution can flow out from spraying box 22 more smoothly faster to see conical hole 221 that sprays, just also can be faster wet filtering cascade 21. Meanwhile, the diameter of the spraying hole is adjusted according to the viscosity concentration of the selected solution, 70% glycerol aqueous solution is selected for screening in the embodiment, the diameter of each spraying hole is set to be 3mm, and the spraying speed can be equivalent to the flow speed of the water pump when the water pump is started.
As shown in fig. 3, a gauze buffer layer 25 is disposed between the spraying box 22 and the filtering water curtain 21, and the gauze buffer layer 25 has a buffering function, so as to prevent liquid from splashing to other parts of the system in a down-flow process, reduce the loss of the solution, and keep the interior clean.
The filtration cascade 21 of this embodiment is cellular cascade, and its material is the wet curtain paper material through monolithic solidification industry, and this material is easily soaked, resistant washing, and non-deformable can repeat reuse, and the structure of filtering the cascade is the oblique side honeycomb structure of tendency under the opening slant, and this structure greatly increased the filter area to the salt fog, and the oblique side honeycomb structure of tendency under the slant does benefit to more and absorbs the salt fog, effectively reduces the probability that the salt fog gets into next layer through the hole.
The long-term non-maintaining salt fog filtration system of this embodiment still includes first pressure difference sensor 5 and second pressure sensor 7, first pressure difference sensor 6 and second pressure sensor 7 correspond respectively and measure the installation of just imitating filter module 1 and high-efficient filter module 3, first pressure difference sensor 6 is used for measuring the pressure differential at the first end of imitating filter module 1, second pressure sensor 7 is used for measuring the pressure differential at the 3 both ends of high-efficient filter module, can judge when the pressure differential is higher than a definite value that just imitates filter module 1 or high-efficient filter module 3 need overhaul. First pressure difference sensor 6 and second pressure difference sensor 7 respectively with controller electric connection, the signal that first pressure difference sensor 6 and second pressure difference sensor 7 sent is received to the controller, can realize automatic alarm, when the value of pressure difference is higher than the setting value, the accessible controller sends the police dispatch newspaper, reminds the staff to overhaul.
The flow chart shown in fig. 5 shows a control method of the long-acting maintenance-free salt fog filtering system of the embodiment, which comprises the following steps:
s1: the water pump 24 is started, the salt spray absorption liquid in the liquid storage tank 23 is continuously conveyed to the spraying box 22 through the water pump 24, then the salt spray absorption liquid is sprayed on the filtering water curtain 21 through the spraying box 22, when the liquid level of the salt spray absorption liquid in the spraying box reaches balance and does not change, namely the salt spray absorption liquid completely wets the filtering water curtain 21, the water pump 24 is closed, and in the process, the fan 4 is kept closed. The wetting time of the water curtain is related to the concentration of the salt spray absorption liquid, and the color is dark brown when the filtering water curtain is fully wetted; the time of spraying the whole wetting degree of the filtering water curtain 21 is the working time of the water pump 24, and the 70% glycerol solution screened by the embodiment can completely wet the filtering water curtain 21 after the water pump 24 works for 10 minutes;
s2: after the water pump is closed, standing for a period of time, starting the fan after the salt mist absorption liquid in the spraying box completely flows out, wherein the standing time is the time required for testing the complete flowing-out of the salt mist absorption liquid in the spraying box; to ensure that all of the excess solution on the curtain falls into the reservoir, the resting time may be set to 120% of the time required for complete draining.
S3: open fan 4, the air gets into from air intake 51, blows off from air outlet 52 after the combination filtration of initial effect filtration module 1, long-term chemical filtration module 2 and high-efficient filtration module 3, according to the salt fog absorption liquid air-dry condition on filtering cascade 21, closes fan 4. When the salt spray absorption liquid on the filtering water curtain 21 is completely dried, the filtering water curtain is earthy yellow, and at least 80% of the complete drying time of the selected salt spray absorption liquid in the working environment is set as the working time of the fan. In the case of the 70% glycerin solution screened in this example, the operation time of the blower 4 was set to 96 hours.
S4: steps S1, S2, and S3 are repeated.
The liquid storage tank 23 of the embodiment is a 2-liter tank, and on the premise of ensuring the filtering efficiency, the maintenance-free period of the invention can be effectively used for more than 3 years in a relatively closed space through on-site verification, and the maintenance-free period of the invention can be effectively used for more than 1 year in a space in which fresh air needs to be introduced. The size of the liquid storage tank can be selected according to the maintenance-free period, so that more solutions can be stored, and the maintenance-free effect can be achieved for a longer time.
The above-described embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and various other modifications, substitutions and alterations can be made to the above-described structure of the present invention without departing from the basic technical concept of the present invention as described above, according to the common technical knowledge and conventional means in the field of the present invention.
Claims (9)
1. The utility model provides a long-term non-maintaining salt fog filtration system, its includes casing, fan and controller be equipped with air intake and air outlet on the casing be equipped with the intercommunication in the casing the filtration passageway of air intake and air outlet, its characterized in that: a primary filtering module for filtering dust and large-particle pollutants in the air, a long-acting chemical filtering module for filtering salt mist in the air and a high-efficiency filtering module for filtering residual micro salt mist particles at a front stage are sequentially arranged in the filtering channel from the air inlet to the air outlet, the long-acting chemical filtering module filters the salt mist through a salt mist absorption liquid circulated by a water pump, and the controller controls the water pump and the fan to be alternately opened and closed so that the air containing the salt mist sequentially passes through the primary filtering module, the long-acting chemical filtering module and the high-efficiency filtering module to realize three-stage combined filtering;
the long-acting chemical filtering module comprises a filtering water curtain wetted by salt spray absorption liquid, a liquid storage box which is used for receiving the salt spray absorption liquid dropping from the filtering water curtain and is used for containing the salt spray absorption liquid is arranged below the filtering water curtain, a spraying box which is used for spraying the salt spray absorption liquid to the filtering water curtain is arranged above the filtering water curtain, a plurality of spraying holes are distributed on the lower surface of the spraying box, and the water pump is used for conveying the salt spray absorption liquid in the liquid storage box to the spraying box.
2. The long-acting maintenance-free salt mist filtration system of claim 1, wherein: the salt spray absorption liquid is a mixed solution of glycerol and water.
3. The long-acting maintenance-free salt mist filtration system of claim 1, wherein: the high-efficiency filtering module is a progressive super-hydrophobic fiber filtering module.
4. The long-acting maintenance-free salt mist filtration system of claim 1, wherein: the spraying holes are conical spraying holes with large upper end diameter and small lower end diameter; the size of the conical spraying hole is adjusted according to the concentration of the selected salt spray absorption liquid.
5. The long-acting maintenance-free salt mist filtration system of claim 1, wherein: a gauze buffer layer is arranged between the spraying box and the filtering water curtain.
6. The long-acting maintenance-free salt mist filtration system of claim 1, wherein: the filtering water curtain is a honeycomb water curtain and is made of wet curtain paper.
7. The long-acting maintenance-free salt mist filtration system of claim 1, wherein: long-term non-maintaining salt fog filtration system still including being used for measuring the first pressure difference sensor of the pressure differential at first effect filtration module both ends with be used for measuring the second pressure sensor of the pressure differential at high efficiency filtration module both ends, first pressure difference sensor and second pressure difference sensor respectively with controller electric connection.
8. The long acting maintenance-free salt mist filtration system of claim 2, wherein: the concentration screening of the salt spray absorption liquid comprises the following steps:
s1: preparing a plurality of salt mist absorption liquids with different concentrations;
s2: distributing a plurality of material blocks which are made of the same material as the filtering water curtain respectively corresponding to the salt spray absorption liquid with each concentration, absorbing the salt spray absorption liquid with the corresponding concentration on the material blocks, dividing the material blocks which absorb the salt spray absorption liquid with the same concentration into a group, weighing the material blocks of each group respectively, and averaging the weight of the material blocks of each group respectively to obtain the initial weight m1 corresponding to each group;
s3: placing the material blocks in an experimental space, setting the temperature and humidity of the experimental space to be the same as those of an actual use environment, weighing the material blocks of each group again when the time that the material blocks are located in the experimental space reaches a preset test period, and averaging the weights of the material blocks of each group to obtain an experimental weight m2 corresponding to each group;
s4: and subtracting m1 from m2 of the corresponding group to obtain a difference value, taking the absolute value of the difference value to obtain | delta m |, and comparing the | delta m |, corresponding to each group, wherein the group with the smallest | delta m |, is the salt spray absorption liquid with the screening concentration.
9. A method of controlling a long acting maintenance-free salt mist filtration system as claimed in any one of claims 1 to 7, comprising the steps of:
s1: starting the water pump, continuously conveying the salt spray absorption liquid in the liquid storage tank to the spraying box through the water pump, spraying the salt spray absorption liquid on the filtering water curtain through the spraying box, and closing the water pump when the liquid level of the salt spray absorption liquid in the spraying box reaches balance and does not change, wherein in the process, the fan is kept closed;
s2: after the water pump is closed, standing for a period of time, and starting a fan after the salt spray absorption liquid of the spraying box completely flows clean;
s3: the fan is started, air enters from the air inlet, is blown out from the air outlet after passing through the primary filtering module, the long-acting chemical filtering module and the high-efficiency filtering module, the working time of the fan is set according to the air drying condition of the salt spray absorption liquid on the filtering water curtain, and the fan is closed; setting at least 80% of the complete air drying time of the selected salt spray absorption liquid in the working environment as the working time of the fan;
s4: steps S1, S2, and S3 are repeated.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010324396.0A CN111644003B (en) | 2020-04-22 | 2020-04-22 | Long-acting maintenance-free salt mist filtering system and control method |
| PCT/CN2020/102248 WO2021212671A1 (en) | 2020-04-22 | 2020-07-16 | Long-lasting maintenance-free salt spray filtering system and control method therefor, and salt spray absorption liquid concentration screening method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010324396.0A CN111644003B (en) | 2020-04-22 | 2020-04-22 | Long-acting maintenance-free salt mist filtering system and control method |
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| CN201744250U (en) * | 2010-05-28 | 2011-02-16 | 海南金盘电气有限公司 | System with functions of salt mist removal, ventilation and filtering |
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| JP2012245519A (en) * | 2012-07-17 | 2012-12-13 | Horiba Ltd | Removal device for saline mist and analysis apparatus using the same |
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| WO2021212671A1 (en) | 2021-10-28 |
| CN111644003A (en) | 2020-09-11 |
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