Method for cleaning filter element of electro-hydraulic control filter of coal mine hydraulic support

Abstract

The invention belongs to the technical field of filter element cleaning, and relates to a cleaning method of a coal mine hydraulic support electro-hydraulic control filter element, which comprises oil stain treatment, rubber treatment and / or gravel treatment and rust treatment. The oil stain treatment comprises soaking in an oil stain cleaning agent and drying; the rubber treatment comprises baking in an oven, ultrasonic treatment with a rubber cleaning agent, flushing with a high-pressure water gun and drying; the gravel treatment comprises oven baking, high-frequency vibrating screen vibration, ultrasonic cleaning, high-pressure water gun scouring and drying; the rust treatment comprises the steps of soaking in a rust removal cleaning agent, washing and drying. According to the cleaning method for the electro-hydraulic control filter element of the coal mine hydraulic support, blockages can be thoroughly removed, the cleaning success rate can reach 95%, the filter element of the filter can be reused, and the cost is saved for a mine; the consumed time is shorter, the efficiency is higher, and the cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of filter element cleaning, and in particular relates to a method for cleaning a filter element of an electro-hydraulic control filter of a coal mine hydraulic support. Background Art

[0002] In the process of coal mining, hydraulic support is one of the main equipment in comprehensive mining equipment. Hydraulic support is used for mine support and protection. The electro-hydraulic control system is the control system, which ensures the normal use of the support by controlling the hydraulic oil pressure. The filter element is an important component for filtering dirt. The working environment of the hydraulic support is harsh. In addition to oil and rust, the dirt on the electro-hydraulic control filter element of the coal mine hydraulic support often contains sand and rubber, which is stubborn and difficult to clean, resulting in reduced filtering performance and even unusable, affecting work efficiency and production. The existing technology does not have a convenient cleaning method for use with it, and replacement will greatly increase costs, affecting the economic benefits of coal mining enterprises. Summary of the invention

[0003] In view of the deficiencies of the above-mentioned prior art, the present invention provides a method for cleaning the filter element of an electro-hydraulic control filter of a coal mine hydraulic support. The specific technical scheme is as follows:

[0004] A method for cleaning a filter element of an electro-hydraulic control filter of a coal mine hydraulic support, comprising oil treatment, rubber treatment and / or sand and stone treatment, and rust treatment;

[0005] The oil stain treatment is to soak the filter element in an oil stain cleaning agent and then dry it;

[0006] The rubber treatment is to put the filter element into an oven again and heat it to the rubber melting point, put it into an ultrasonic cleaning machine without cooling after baking, pour in rubber cleaning agent, take it out after ultrasonic vibration, rinse it with a high-pressure water gun for 2-3 times, and dry it;

[0007] The sand and stone treatment is to soak the filter element in a sand and stone removal agent, then put it in an oven for baking, then put it in a high-frequency vibration screen for vibration, and then clean it with ultrasonic waves; finally, flush it with a high-pressure water gun and dry it;

[0008] The rust treatment is to soak the filter element in a rust removal cleaning agent, and then rinse and dry it.

[0009] Furthermore, in the oil pollution treatment step, the soaking temperature is 70-90°C, the soaking time is 30-50 minutes, the drying temperature is 120-160°C, and the drying time is 20-40 minutes.

[0010] Furthermore, the oil cleaning agent comprises 3-5% diethylene glycol, 3-5% diethanolamine, 0.05-0.2% organosilicon defoaming agent and the remainder is water in percentage by mass.

[0011] Furthermore, in the rubber processing step, the oven temperature is 600-800°, and the baking time is 60-180 minutes; the ultrasonic frequency is 10-30KHz, the ultrasonic power is 2000-4000W, and the ultrasonic time is 30-50 minutes; the flushing pressure of the high-pressure water gun is 6-10 kg, and the flushing is 2-3 times, each time for 10-30 minutes; the drying temperature is 180-220°, and the drying time is 30-120 minutes.

[0012] Furthermore, the rubber cleaning agent comprises 50-80% of halogenated hydrocarbons, 10-15% of antioxidants, and 5-20% of additives.

[0013] Furthermore, the halogenated hydrocarbon is a chlorinated hydrocarbon and / or a fluorochlorocarbon, the chlorinated hydrocarbon is tetrachloroethylene and / or dichloromethane; the fluorochlorocarbon is 1-fluoro-1,1-dichloroethane.

[0014] Furthermore, the antioxidant is one or more of citric acid, tartaric acid, gluconic acid, sodium lactate, sodium gluconate and polypropylene.

[0015] Furthermore, the additives include one or more of ester additives, hydrocarbon additives, alcohol additives, alcohol ether additives, and amine additives.

[0016] Furthermore, the ester additive is one or more of ethyl acetate, methyl acetate, butyl acetate, dimethyl oxalate, diethyl oxalate, dimethyl succinate, dimethyl glutarate, dimethyl adipate and dimethyl carbonate; the hydrocarbon additive is one or more of alkane solvents with a carbon number of 6 to 7; the alcohol additive is one or more of propanol, butanol and isohexanediol; the alcohol ether additive is one or more of diethylene glycol butyl ether, diethylene glycol methyl ether, dipropylene glycol butyl ether, dipropylene glycol methyl ether, ethylene glycol methyl ether, propylene glycol methyl ether, ethylene glycol butyl ether and propylene glycol butyl ether; the amine additive is one or more of formamide, acetamide, monoethanolamine, diethanolamine and triethanolamine.

[0017] Furthermore, in the sand and stone processing step, the oven temperature is 600-800°C, the baking time is 60-200 minutes, the high-frequency vibration screen vibrates for 30-60 minutes, and the vibration frequency is 2000-3000 times / min; the ultrasonic frequency of the ultrasonic cleaning is 10-30KHz, the ultrasonic power is 2000-4000W, and the ultrasonic time is 5-10 minutes; the flushing pressure of the high-pressure water gun is 6-10 kg, and the time is 10-30 minutes; the drying temperature is 120-160°C, and the drying time is 20-40 minutes.

[0018] Furthermore, the mass percentage composition of the sand and stone remover is 60-90% of Osk-I, 5-10% of citric acid, 10-15% of oxalic acid, 5-10% of corrosion inhibitor, and 1-10% of dispersant, and the sum of the mass percentage compositions of each substance is 100%.

[0019] Furthermore, the corrosion inhibitor is thiourea and / or hexamethylenetetramine.

[0020] Furthermore, the dispersant is one or more of isomeric fatty alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, octylphenol polyoxyethylene ether, coconut oil fatty acid diethanolamide, sodium dodecylbenzene sulfonate and fatty alcohol polyoxyethylene ether sodium sulfate.

[0021] Furthermore, in the rust treatment step, the immersion temperature is 40-60° C., the immersion time is 14-16 hours, the drying temperature is 350-450° C., and the drying time is 160-200 minutes.

[0022] Furthermore, the mass percentage composition of the rust removing cleaning agent is 2-5% sodium pyrophosphate, 20%-30% surfactant, 5%-10% organic acid, and the rest is water.

[0023] Furthermore, the surfactant is one or more of octylphenol polyoxyethylene ether, cocamidopropyl betaine, sodium lauryl sulfate, coconut oil fatty acid diethanolamide, sucrose ester, and coconut oil acid.

[0024] The beneficial effects of the present invention are:

[0025] The cleaning method of the electro-hydraulic control filter element of the coal mine hydraulic support of the present invention can completely remove the blockage, and the cleaning success rate can reach 95%, so that the filter element can be reused, saving costs for the mine; and the method is time-saving, efficient, and cost-reducing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a comparison diagram of the filter element before and after cleaning of Example 1 of the present invention;

[0027] Figure 2 This is a comparison diagram of the filter element before and after cleaning of Example 2 of the present invention;

[0028] Figure 3 This is a comparison diagram of the filter element of Example 3 of the present invention before and after cleaning. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with embodiments. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] Embodiment 1:

[0031] A method for cleaning a filter element of an electro-hydraulic control filter of a coal mine hydraulic support containing oil, rubber and rust, comprising the following steps:

[0032] (1) soaking the filter element in an oil cleaning agent composed of 4% diethylene glycol, 4% diethanolamine, 0.1% silicone defoamer, and 91.9% water at a soaking temperature of 80° C. for 40 minutes, then taking it out and drying it at a drying temperature of 150° C. for 30 minutes;

[0033] (2) The filter element is placed in an oven and heated to 800° C. to reach the melting point of rubber. After baking for 120 minutes, the filter element is directly placed in an ultrasonic cleaning machine without cooling, and a rubber cleaning agent is poured in. The rubber cleaning agent is composed of 70% halogenated hydrocarbon tetrachloroethylene, 15% antioxidant citric acid, and 15% additive diethylene glycol butyl ether. Ultrasonic cleaning is performed for 40 minutes at an ultrasonic frequency of 250 KHz and an ultrasonic power of 3000 W. The filter element is then taken out and rinsed with a high-pressure water gun for 3 times, each time for 5 minutes, at a pressure of 8 kg. Finally, the filter element is placed in an oven and dried at 200° C.

[0034] (3) The filter element is then immersed in a rust removal cleaning agent composed of 3% sodium pyrophosphate, 25% surfactant sodium dodecyl sulfate, 8% organic acid oxalic acid, and 64% water at a soaking temperature of 50° C. for 15 hours. The filter element is then rinsed with clean water and dried at a drying temperature of 400° C. for 180 minutes.

[0035] Comparison pictures before and after cleaning Figure 1 shown.

[0036] Embodiment 2:

[0037] A method for cleaning a filter element of an electro-hydraulic control filter of a hydraulic support in a coal mine containing oil, sand, stone and rust, comprising the following steps:

[0038] (1) soaking the filter element in an oil cleaning agent composed of 4% diethylene glycol, 4% diethanolamine, 0.1% silicone defoamer, and 91.9% water at a soaking temperature of 80° C. for 40 minutes, and drying at a drying temperature of 150° C. for 30 minutes;

[0039] (2) The filter element is then placed in a sand and stone removal agent composed of 75% of OSK-I, 5% of citric acid, 10% of oxalic acid, 5% of corrosion inhibitor thiourea, and 5% of dispersant isomerized fatty alcohol polyoxyethylene ether, and soaked for 40 minutes, then placed in a high-temperature oven at 700°C, baked for 100 minutes, and then placed in a high-frequency vibration screen for 50 minutes of vibration, with a vibration frequency of 3000 times / min; then ultrasonically cleaned for 40 minutes, with an ultrasonic frequency of 250KHz and an ultrasonic power of 3000W; finally, washed and dried with a high-pressure water gun, with a washing pressure of 8 kg, a washing time of 10 minutes, and a drying temperature of 150°C; the time is 30 minutes;

[0040] (3) The filter element is then immersed in a rust removal cleaning agent composed of 3% sodium pyrophosphate, 25% surfactant sodium dodecyl sulfate, 8% organic acid oxalic acid, and 64% water at a soaking temperature of 50° C. for 15 hours. The filter element is then rinsed with clean water and dried at a drying temperature of 400° C. for 180 minutes.

[0041] Comparison pictures before and after cleaning Figure 2 shown.

[0042] Embodiment 3:

[0043] A method for cleaning a filter element of an electro-hydraulic control filter of a hydraulic support for a coal mine containing oil, sand, rubber and rust, comprising the following steps:

[0044] (1) soaking the filter element in an oil cleaning agent composed of 4% diethylene glycol, 4% diethanolamine, 0.1% silicone defoamer, and 91.9% water at a soaking temperature of 80° C. for 40 minutes, and drying at a drying temperature of 150° C. for 30 minutes;

[0045] (2) The filter element is placed in an oven and heated to 800°C to reach the melting point of rubber. After baking for 120 minutes, it is placed in an ultrasonic cleaning machine without cooling, and the rubber cleaning agent is poured into the rubber cleaning agent, which is composed of 70% halogenated hydrocarbon tetrachloroethylene, 15% antioxidant citric acid, and 15% additive diethylene glycol butyl ether. Ultrasonic treatment is performed for 40 minutes at an ultrasonic frequency of 250KHz and an ultrasonic power of 3000W. Then, the filter element is taken out and rinsed with a high-pressure water gun for 3 times, each time for 5 minutes, at a pressure of 8 kg. Finally, it is placed in an oven and dried at 200°C.

[0046] (3) The filter element is then placed in a sand and stone removal agent composed of 75% of OSK-I, 5% of citric acid, 10% of oxalic acid, 5% of corrosion inhibitor thiourea, and 5% of dispersant isomerized fatty alcohol polyoxyethylene ether, and soaked for 40 minutes, then placed in a high-temperature oven at 700°C, baked for 100 minutes, and then placed in a high-frequency vibration screen for 50 minutes of vibration, with a vibration frequency of 3000 times / min; then ultrasonically cleaned for 40 minutes, with an ultrasonic frequency of 250KHz and an ultrasonic power of 3000W; finally, washed and dried with a high-pressure water gun, with a washing pressure of 8 kg, washing for 10 minutes, and drying at a temperature of 150°C; the time is 30 minutes;

[0047] (4) The filter element is then immersed in a rust removal cleaning agent composed of 3% sodium pyrophosphate, 25% surfactant sodium dodecyl sulfate, 8% organic acid oxalic acid, and 64% water at a soaking temperature of 50° C. for 15 hours. The filter element is then rinsed with clean water and dried at a drying temperature of 400° C. for 180 minutes.

[0048] Comparison pictures before and after cleaning Figure 3 shown.

[0049] It can be seen from the comparison diagrams before and after cleaning the filter element in the above embodiments that the cleaning method of the electro-hydraulic control filter element of the coal mine hydraulic support of the present invention can completely remove the blockage, so that the filter element can be reused, saving costs for the mine; and this method takes less time, is more efficient, and reduces costs.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for cleaning a filter element of an electro-hydraulic control filter of a coal mine hydraulic support, characterized in that: Including oil treatment, rubber treatment and / or sand treatment, rust treatment; The oil stain treatment is to soak the filter element in an oil stain cleaning agent and then dry it; The rubber treatment is to put the filter element into an oven again and heat it to the rubber melting point, put it into an ultrasonic cleaning machine without cooling after baking, pour in rubber cleaning agent, take it out after ultrasonic vibration, rinse it with a high-pressure water gun for 2-3 times, and dry it; The sand and stone treatment is to soak the filter element in a sand and stone removal agent, then put it in an oven for baking, then put it in a high-frequency vibration screen for vibration, and then clean it with ultrasonic waves; finally, flush it with a high-pressure water gun and dry it; The rust treatment is to soak the filter element in a rust removal cleaning agent, and then rinse and dry it.

2. The method for cleaning the filter element of the electro-hydraulic control filter of a coal mine hydraulic support according to claim 1, characterized in that: In the oil pollution treatment step, the soaking temperature is 70-90° C., the soaking time is 30-50 minutes, the drying temperature is 120-160° C., and the drying time is 20-40 minutes.

3. The method for cleaning the filter element of the electro-hydraulic control filter of a coal mine hydraulic support according to claim 2, characterized in that: The mass percentage composition of the oil cleaning agent is 3-5% of diethylene glycol, 3-5% of diethanolamine, 0.05-0.2% of organic silicon defoaming agent, and the rest is water.

4. The method for cleaning the filter element of the electro-hydraulic control filter of a coal mine hydraulic support according to claim 1, characterized in that: In the rubber treatment step, the oven temperature is 600-800°, and the baking time is 60-180 minutes; the ultrasonic frequency is 10-30KHz, the ultrasonic power is 2000-4000W, and the ultrasonic time is 30-50 minutes; the flushing pressure of the high-pressure water gun is 6-10 kg, and the flushing is performed 2-3 times, each time for 10-30 minutes; the drying temperature is 180-220°, and the drying time is 30-120 minutes.

5. The method for cleaning the filter element of the electro-hydraulic control filter of a coal mine hydraulic support according to claim 4, characterized in that: The rubber cleaning agent comprises 50-80% of halogenated hydrocarbons, 10-15% of antioxidants, and 5-20% of additives, wherein the additives comprise one or more of ester additives, hydrocarbon additives, alcohol additives, alcohol ether additives, and amine additives.

6. The method for cleaning the filter element of the electro-hydraulic control filter of a coal mine hydraulic support according to claim 5, characterized in that: The halogenated hydrocarbon is a chlorinated hydrocarbon and / or a fluorochlorocarbon, the chlorinated hydrocarbon is tetrachloroethylene and / or dichloromethane; the fluorochlorocarbon is 1-fluoro-1,1-dichloroethane; the antioxidant is one or more of citric acid, tartaric acid, gluconic acid, sodium lactate, sodium gluconate and polypropylene.

7. The method for cleaning the filter element of the electro-hydraulic control filter of a coal mine hydraulic support according to claim 1, characterized in that: In the sand and stone processing step, the oven temperature is 600-800°C, the baking time is 60-200 minutes, the high-frequency vibration screen vibrates for 30-60 minutes, and the vibration frequency is 2000-3000 times / min; the ultrasonic frequency of the ultrasonic cleaning is 10-30KHz, the ultrasonic power is 2000-4000W, and the ultrasonic time is 5-10 minutes; the flushing pressure of the high-pressure water gun is 6-10 kg, and the time is 10-30 minutes; the drying temperature is 120-160°C, and the drying time is 20-40 minutes.

8. The method for cleaning the filter element of the electro-hydraulic control filter of a coal mine hydraulic support according to claim 7, characterized in that: The mass percentage composition of the sand and stone remover is 60-90% of OSK-I, 5-10% of citric acid, 10-15% of oxalic acid, 5-10% of corrosion inhibitor, and 1-10% of dispersant, and the sum of the mass percentage compositions of each substance is 100%.

9. The method for cleaning the filter element of the electro-hydraulic control filter of a coal mine hydraulic support according to claim 1, characterized in that: In the rust treatment step, the immersion temperature is 40-60° C., the immersion time is 14-16 hours, the drying temperature is 350-450° C., and the drying time is 160-200 minutes.

10. The method for cleaning the filter element of the electro-hydraulic control filter of a coal mine hydraulic support according to claim 1, characterized in that: The mass percentage composition of the rust removal cleaning agent is 2-5% sodium pyrophosphate, 20%-30% surfactant, 5%-10% organic acid, and the rest is water.

Images