Small-air-volume high-negative-pressure wet-type anti-explosion dust collection device

Abstract

The utility model provides a small-air-volume high-negative-pressure wet-type anti-explosion dust suction device, relates to the technical field of dust suction devices, and aims to solve the technical problem that a dry-type high-efficiency filtering small-air-volume high-negative-pressure dust suction device in the prior art is not suitable for being directly used for removing flammable and explosive dust. A small-air-volume high-negative-pressure wet-type anti-explosion dust suction device comprises an upper barrel, a lower barrel, a conical cyclone, a sludge barrel and a negative-pressure fan, the upper barrel is connected to the upper portion of the lower barrel, a waste gas inlet is formed in the side wall of the upper barrel, cleaning water used for conducting self-excitation type washing on waste gas is contained in the upper barrel, and the lower barrel is connected with the lower barrel. The sludge barrel is arranged in the lower barrel and communicated with an inner cavity of the upper barrel, the conical cyclone is arranged in the upper barrel and higher than the liquid level of cleaning water, the diameter of the upper end of the conical cyclone is smaller than that of the lower end of the conical cyclone, the negative pressure fan is connected with the upper barrel and higher than the conical cyclone, and the negative pressure fan is provided with a fan air outlet pipeline communicated with the inner cavity of the upper barrel.

Description

Technical Field

[0001] This utility model relates to the technical field of dust collection devices, specifically to a small-volume, high-negative-pressure wet explosion-proof dust collection device. Background Technology

[0002] Small-volume, high-negative-pressure dust collection devices are generally used for surface cleaning and dust extraction with long, thin flexible hoses, and mostly employ dry, high-efficiency filtration for dust removal. However, for some flammable and explosive dusts, dry equipment requires additional highly reliable fire and explosion-proof facilities. Furthermore, in some regions, wet dust collection is explicitly required or recommended for certain explosive dusts. Therefore, providing a small-volume, high-negative-pressure explosion-proof dust collection device for the removal of flammable and explosive dust is an urgent problem to be solved. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a small-volume, high-negative-pressure wet explosion-proof dust collection device, thereby solving the technical problem that existing dry high-efficiency filtration small-volume, high-negative-pressure dust collection devices are not suitable for direct use in the removal of flammable and explosive dust.

[0004] To solve the above-mentioned technical problems, this utility model provides a small-volume, high-negative-pressure wet explosion-proof dust collection device, including an upper cylinder, a lower cylinder, a conical cyclone separator, a sludge bucket, and a negative-pressure fan. The upper cylinder is connected above the lower cylinder, and the side wall of the upper cylinder is provided with an exhaust gas inlet. The upper cylinder contains cleaning water for self-excited washing of the exhaust gas. The sludge bucket is located in the lower cylinder and communicates with the inner cavity of the upper cylinder. The conical cyclone separator is located in the upper cylinder and is higher than the cleaning water level. The upper diameter of the conical cyclone separator is smaller than the lower diameter. The negative-pressure fan is connected to the upper cylinder and is higher than the conical cyclone separator. The negative-pressure fan is provided with a fan outlet duct that communicates with the inner cavity of the upper cylinder.

[0005] With the above structure, the small air volume high negative pressure wet explosion-proof dust collection device of this utility model has the following advantages: the negative pressure fan generates negative pressure, so that the exhaust gas enters the upper cylinder tangentially from the exhaust gas inlet on the side wall of the upper cylinder, and the exhaust gas impacts the cleaning water for self-excited washing. The exhaust gas rises in the upper cylinder and spirals upward using the conical surface of the conical cyclone separator to achieve gas-liquid separation, so that most of the water-containing and dust-containing liquid is separated into solid and liquid. The cleaning sludge falls to the water surface and settles into the sludge bucket, thus completing the dust removal. The wet dust removal method can be used for the dust removal of flammable and explosive dust without the need for additional fire prevention and explosion-proof facilities.

[0006] As an improvement, a high-efficiency filtration section is provided at the upper end of the upper cylinder, and a negative pressure fan is located above the high-efficiency filtration section. The high-efficiency filtration section contains a primary coarse filter block and a secondary fine filter block located above the primary coarse filter block. With this structure, the primary coarse filter block and the secondary fine filter block in the high-efficiency filtration section perform secondary filtration, further removing dust from the gas and improving the dust removal effect.

[0007] As an improvement, a pressure plate is installed in the high-efficiency filtration section, with the bottom of the pressure plate abutting against the top of the secondary fine filter block. With this structure, the pressure plate prevents the primary coarse filter block and the secondary fine filter block from being moved by the rising airflow during the dust removal process, thus preventing the filtration effect from being affected.

[0008] As an improvement, the negative pressure fan is equipped with a fan inlet duct, and an air replenishment safety valve is connected inside the fan inlet duct. With this structure, the air replenishment safety valve is closed during normal dust removal. When the primary coarse filter block and the secondary fine filter block become blocked, the air replenishment safety valve is opened to replenish air and prevent the equipment from being damaged by excessively low negative pressure.

[0009] As an improvement, a silencer exhaust pipe is connected to the fan's outlet duct; this structure reduces noise at the fan's outlet duct.

[0010] As an improvement, a water replenishment tank is connected to the upper cylinder, and a water replenishment solenoid valve is connected between the upper cylinder and the water replenishment tank. The water replenishment tank is also connected to a one-way valve for the overflow port. With this structure, the water level in the upper cylinder can be adjusted in a timely manner through the water replenishment tank to maintain the best cleaning effect.

[0011] As an improvement, a connecting cover is connected to the bottom of the upper cylinder, and a jack is installed at the bottom of the lower cylinder. The jack is connected to the sludge bucket, causing the sludge bucket to abut against the connecting cover. A sealing ring is provided between the connecting cover and the sludge bucket. With this structure, in dust removal mode, the jack lifts the sludge bucket and connects it to the connecting cover, and the sealing ring ensures the seal between the connecting cover and the sludge bucket. After the jack drives the sludge bucket to descend, the sludge bucket separates from the connecting cover. At this time, the sludge bucket can be poured out by tilting it, which facilitates the cleaning of the sludge.

[0012] As an improvement, a slide valve is provided between the upper cylinder and the connecting cover; with this structure, the upper cylinder and the connecting cover can be disconnected through the slide valve when sludge needs to be cleaned, which facilitates the cleaning of sludge.

[0013] As an improvement, a drain valve is connected to the side wall of the sludge bucket, and a vent valve is connected to the connecting cover; with this structure, the upper layer of sewage in the sludge bucket can be easily discharged through the drain valve and the vent valve.

[0014] As an improvement, the exhaust gas inlet is connected to an exhaust gas inlet pipe, and a regulating valve is connected inside the exhaust gas inlet pipe; with this structure, the air volume can be adjusted in a timely manner according to the dust content of the exhaust gas by adjusting the air valve. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the present invention (with a slide valve).

[0016] Figure 2 This is the front view of the present invention (with a slide valve).

[0017] Figure 3 This is a three-dimensional structural diagram of the present invention (with a slide valve).

[0018] Figure 4 This is the front view of the present invention (without a slide gate valve).

[0019] Attached reference numerals: 1. Upper cylinder; 2. Lower cylinder; 3. Conical cyclone separator; 4. Sludge bucket; 5. Negative pressure fan; 6. Exhaust gas inlet; 7. Fan outlet duct; 8. High-efficiency filter section; 9. Primary coarse filter block; 10. Secondary fine filter block; 11. Pressure plate; 12. Fan inlet duct; 13. Air replenishment safety valve; 14. Silencing exhaust stack; 15. Water replenishment tank; 16. Water replenishment solenoid valve; 17. Water tank overflow check valve; 18. Connecting cover; 19. Jack; 20. Sealing ring; 21. Slide valve; 22. Drain valve; 23. Vent valve; 24. Exhaust gas inlet duct; 25. Regulating valve; 26. Inspection cover. Detailed Implementation

[0020] The following is a detailed description of a small-volume, high-negative-pressure wet explosion-proof dust collection device according to the present invention, with reference to the accompanying drawings.

[0021] like Figures 1 to 4 As shown, a small-volume, high-negative-pressure wet explosion-proof dust collector includes an upper cylinder 1, a lower cylinder 2, a conical cyclone separator 3, a sludge bucket 4, and a negative-pressure fan 5. The upper cylinder 1 is connected above the lower cylinder 2. An exhaust gas inlet 6 is provided on the side wall of the upper cylinder 1. The upper cylinder 1 contains cleaning water for self-excited scrubbing of the exhaust gas. Figure 1 As shown, in this embodiment, the level of the cleaning water is approximately equal to the bottom of the exhaust gas inlet 6. When the exhaust gas is tangentially introduced into the exhaust gas inlet 6, the exhaust gas can impact the cleaning water to achieve self-excited washing. The sludge bucket 4 is located inside the lower cylinder 2 and communicates with the inner cavity of the upper cylinder 1. The conical cyclone separator 3 is located inside the upper cylinder 1 and is higher than the level of the cleaning water, and also higher than the exhaust gas inlet 6 on the side wall of the upper cylinder 1. The upper diameter of the conical cyclone separator 3 is smaller than the lower diameter. The negative pressure fan 5 is connected to the upper cylinder 1 and is higher than the conical cyclone separator 3. The negative pressure fan 5 is provided with a fan outlet pipe 7 that communicates with the inner cavity of the upper cylinder 1.

[0022] like Figure 1 As shown, the upper cylinder 1 is provided with a high-efficiency filter section 8, and the negative pressure fan 5 is located above the high-efficiency filter section 8. Its fan outlet pipe 7 is connected to the inner cavity of the high-efficiency filter section 8, and the inner cavity of the high-efficiency filter section 8 is connected to the inner cavity of the upper cylinder 1. The high-efficiency filter section 8 is provided with a primary coarse filter block 9 and a secondary fine filter block 10 located above the primary coarse filter block 9.

[0023] The negative pressure fan 5 generates high negative pressure, causing the exhaust gas to enter the upper cylinder 1 tangentially from the exhaust gas inlet 6 on the side wall of the upper cylinder 1. The exhaust gas impacts the cleaning water, performing self-excited washing. The exhaust gas rises in the upper cylinder 1 and spirals upward using the conical surface of the conical cyclone separator 3, performing gas-liquid separation. This separates most of the water- and dust-containing liquids into solids and liquids. The cleaning liquid falls to the water surface and settles into the sludge bucket 4. The pre-treated exhaust gas continues to rise into the high-efficiency filter section 8, where it undergoes secondary filtration through the primary coarse filter block 9 and the secondary fine filter block 10. The purified gas is discharged through the fan outlet pipe 7, and the cleaned particulate matter settles into the sludge bucket 4. This utility model adopts a wet dust removal method, which can be used for the dust removal of flammable and explosive dust without the need for additional fire prevention and explosion-proof facilities.

[0024] like Figure 1 As shown, a pressure plate 11 is provided in the high-efficiency filtration section 8. The bottom end of the pressure plate 11 abuts against the upper end of the secondary fine filter block 10 to prevent the primary coarse filter block 9 and the secondary fine filter block 10 from being blown upward by the exhaust gas.

[0025] like Figure 1 As shown, the negative pressure fan 5 is equipped with a fan inlet pipe 12, which is connected to a make-up air safety valve 13. The fan inlet pipe 12 is connected to the upper inner cavity of the high-efficiency filter section 8. When the primary coarse filter block 9 and the secondary fine filter block 10 are blocked, the make-up air safety valve 13 opens, allowing air to enter through the fan inlet pipe 12 to prevent excessive negative pressure from damaging the equipment. In addition, the fan outlet pipe 7 is connected to a silencer exhaust stack 14.

[0026] like Figures 1 to 3 As shown, the upper cylinder 1 is connected to a water supply tank 15, and a water supply solenoid valve 16 is connected between the upper cylinder 1 and the water supply tank 15. The water supply tank 15 is connected to a water tank overflow check valve 17, which is connected to a water source through the water tank overflow check valve 17. The water supply tank 15 is used to replenish cleaning water into the upper cylinder 1 in a timely manner.

[0027] like Figure 1 and Figure 2 As shown, the exhaust gas inlet 6 is connected to an exhaust gas inlet pipe 24, and a regulating valve 25 is connected inside the exhaust gas inlet pipe 24. The upper cylinder 1 is equipped with a circular inspection cover 26 for easy cleaning and maintenance.

[0028] like Figure 1 As shown, the bottom end of the upper cylinder 1 is connected to a connecting cover 18, wherein the bottom end of the upper cylinder 1 is funnel-shaped, and the bottom of the lower cylinder 2 is provided with a jack 19, which is connected to the sludge bucket 4 so that the sludge bucket 4 abuts against the connecting cover 18. A sealing ring 20 is provided between the connecting cover 18 and the sludge bucket 4. The sealing ring 20 can be set on the connecting cover 18 or on the sludge bucket 4. A drain valve 22 is connected to the side wall of the sludge bucket 4, and a vent valve 23 is connected to the connecting cover 18; in this embodiment, as Figure 2As shown, a baffle valve 21 is provided between the upper cylinder 1 and the connecting cover 18; the cleaned particles settle into the sludge bucket 4. When the sludge accumulates to a certain amount, the baffle valve 21 closes, and the drain valve 22 and the vent valve 23 are opened to discharge the upper layer of sewage from the sludge bucket 4. The sludge bucket 4 can be moved out by lifting and lowering it with the jack 19, and after the sludge is poured out, it can be reset. In some other embodiments, the baffle valve 21 may not be provided, such as... Figure 4 As shown, the connecting cover 18 is directly set at the bottom of the upper cylinder 1, which reduces the overall height of the equipment, making the structure more compact and lightweight, and suitable for occasions where the dust material has a high specific gravity and is insoluble in water.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A small air volume high negative pressure wet type explosion-proof dust collection device, characterized in that, Including upper cylinder (1), lower cylinder (2), conical cyclone (3), sludge bucket (4) and negative pressure fan (5), the upper cylinder (1) is connected above the lower cylinder (2), the upper cylinder (1) side wall is equipped with waste gas air inlet (6), the upper cylinder (1) contains the washing water for the self-excitation type washing of waste gas, the sludge bucket (4) is located in the lower cylinder (2) and is communicated with the inner chamber of the upper cylinder (1), the conical cyclone (3) is located in the upper cylinder (1) and is higher than the washing water liquid level, the upper end diameter of the conical cyclone (3) is less than the lower end diameter, the negative pressure fan (5) is connected with the upper cylinder (1) and is higher than the conical cyclone (3), the negative pressure fan (5) is equipped with the fan air outlet pipeline (7) communicated with the inner chamber of the upper cylinder (1).

2. The small air volume high negative pressure wet type explosion-proof dust collection device according to claim 1, characterized in that, The upper end of the upper cylinder (1) is provided with an efficient filtering section (8), and the negative pressure fan (5) is arranged above the efficient filtering section (8); the efficient filtering section (8) is provided with a first-stage coarse filtering block (9) and a second-stage fine filtering block (10) located above the first-stage coarse filtering block (9).

3. The small air volume and high negative pressure wet type explosion-proof dust collection device according to claim 2, characterized in that, The efficient filtering section (8) is provided with a pressing plate (11), and the bottom end of the pressing plate (11) abuts against the upper end of the second-stage fine filtering block (10).

4. The small air volume and high negative pressure wet type explosion-proof dust collection device according to claim 2, characterized in that, The negative pressure fan (5) is provided with a fan air inlet pipeline (12), and the fan air inlet pipeline (12) is connected with a supplementary air safety valve (13).

5. The small air volume high negative pressure wet type explosion-proof dust collection device according to claim 1, characterized in that, The fan air outlet pipeline (7) is connected with a sound-absorbing exhaust cylinder (14).

6. The small air volume and high negative pressure wet type explosion-proof dust collection device according to claim 1, characterized in that, The upper cylinder (1) is connected with a water supplement tank (15), a water supplement electromagnetic valve (16) is connected between the upper cylinder (1) and the water supplement tank (15), and the water supplement tank (15) is connected with a tank overflow one-way valve (17).

7. The small air volume and high negative pressure wet type explosion-proof dust collection device according to claim 1, characterized in that, The bottom end of the upper cylinder (1) is connected with a connecting cover (18), the bottom of the lower cylinder (2) is provided with a jack (19), the jack (19) is connected with the sludge bucket (4) and makes the sludge bucket (4) abut against the connecting cover (18), and a sealing ring (20) is arranged between the connecting cover (18) and the sludge bucket (4).

8. The small air volume and high negative pressure wet type explosion-proof dust collection device according to claim 7, characterized in that, A plug valve (21) is arranged between the upper cylinder (1) and the connecting cover (18).

9. The small air volume and high negative pressure wet type explosion-proof dust collection device according to claim 7, characterized in that, A blowdown valve (22) is connected to the side wall of the sludge bucket (4), and a vent valve (23) is connected to the connecting cover (18).

10. The small air volume and high negative pressure wet-type explosion-proof dust collection device according to claim 1, characterized in that, The waste gas air inlet (6) is connected with a waste gas air inlet pipe (24), and the waste gas air inlet pipe (24) is connected with an air regulating valve (25).

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