Acid mist catcher system capable of adjusting pressure difference

Abstract

The utility model relates to an acid mist catcher system capable of adjusting pressure difference, which comprises an acid mist catcher, an air inlet pipe connected with the air inlet end of the acid mist catcher, an air outlet pipe connected with the air outlet end of the acid mist catcher, and a sulfuric acid pipe communicated with the air outlet pipe, the other end of the sulfuric acid pipe is connected with a concentrated sulfuric acid supply device. Atomized concentrated sulfuric acid is injected into the gas inlet pipe and is used for dissolving ferrous sulfate, TOC and acid mud which are adhered to the filter element of the acid mist catcher, so that the acid mist catcher can be washed, the purpose of reducing the operation pressure difference is achieved, the problem of pressure difference rise caused by blockage of the filter element can be solved, and meanwhile, the service life of the acid mist catcher is prolonged. According to the system, the acid mist catcher does not need to be transformed, only the sulfuric acid pipe needs to be additionally installed and improved at the gas inlet pipe, the whole system structure is simpler, transformation and installation are convenient, and the transformation and installation difficulty is low.

Description

Technical Field

[0001] The utility model relates to the field of chlorine gas filtration, and more specifically to an acid mist collector system capable of adjusting pressure difference. Background Art

[0002] The acid mist collector is used to filter the acid mist and impurities of chlorine gas. After long-term use, the acid mist and impurities in the chlorine gas will form acid sludge in the acid mist collector. If the acid sludge cannot be discharged in time, it will not only cause the filter element of the acid mist collector to be blocked, but also cause corrosion to the equipment, which will bring great hidden dangers to the safe operation of the equipment. The blockage of the filter element of the acid mist collector will cause the pressure difference to increase. To solve the pressure difference increase, the filter element needs to be replaced regularly every 3-4 months.

[0003] In the prior art, an acid mist collector of a dry chlorine filter is provided with a blade demister on a packing section of a chlorine drying tower, and a first spray atomizer is provided on the blade demister. When salt and impurities carried in water mist pass through the acid mist collector, the first spray atomizer works simultaneously, and droplets can be formed on the filter element surface of the acid mist collector and gathered to flow downward, and concentrated sulfuric acid is used to dissolve ferrous sulfate, TOC and acid mud adhering to the acid mist collector, so that the acid mist collector can be washed, thereby achieving the purpose of reducing the operating pressure difference and solving the problem of increased pressure difference caused by filter element blockage.

[0004] However, in the above technical solution, it is necessary to add a blade type demister to the packing section of the chlorine drying tower, and add a spray atomizer to the drying tower and the acid mist collector. This technical solution requires the packing section of the drying tower and the acid mist collector to be modified, which is difficult to install and put into use in actual implementation. In addition, it is necessary to spray concentrated sulfuric acid for a long time, which will cause waste of concentrated sulfuric acid. Utility Model Content

[0005] In order to overcome the problem of great installation difficulty in the above technical solutions, the utility model provides an acid mist collector system with adjustable pressure difference, which can solve the problem of increased pressure difference and has low installation difficulty.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: an acid mist trap system with adjustable pressure difference, comprising an acid mist trap, an air inlet pipe connected to the air inlet end of the acid mist trap, an air outlet pipe connected to the air outlet end of the acid mist trap, and a sulfuric acid pipe connected to the air outlet pipe, one end of the sulfuric acid pipe extends into the air inlet pipe and an atomizer is installed at the end, and the other end of the sulfuric acid pipe is connected to a concentrated sulfuric acid supply device. The concentrated sulfuric acid supply device can be a tank body filled with concentrated sulfuric acid or a device for concentrated sulfuric acid produced in a pre-process.

[0007] In the above technical scheme, chlorine enters the acid mist trap through the air inlet pipe for filtration, and sulfate acid mist and impurities contained in the chlorine will be intercepted by the filter element of the acid mist trap. When the chlorine is inhaled, the concentrated sulfuric acid supply device supplies concentrated sulfuric acid to the atomizer through the sulfuric acid pipe, and the atomizer atomizes the concentrated sulfuric acid and sprays it out to mix with the chlorine in the air inlet pipe. The concentrated sulfuric acid in the chlorine forms concentrated sulfuric acid droplets on the surface of the filter element of the acid mist trap, gathers and flows downward, and the ferrous sulfate, TOC and acid mud adhering to the filter element of the acid mist trap are dissolved by the concentrated sulfuric acid, so that the acid mist trap can be washed. In addition, the sulfate concentration originally contained in the chlorine is low, and the filter element cannot be completely filtered when filtering, and after increasing the content of sulfuric acid in the chlorine, the filtering effect of the filter element is improved, and the filtered chlorine is purer.

[0008] Preferably, the atomizer is a nozzle, and the direction of the nozzle is perpendicular to the axis of the air inlet pipe. Concentrated sulfuric acid is sprayed through the small-aperture nozzle of the nozzle. Since the spraying direction of concentrated sulfuric acid is perpendicular to the flow direction of chlorine, it can be more evenly mixed with chlorine.

[0009] Preferably, it also includes an inert gas pipe and a gas supply device connected to one end of the inert gas pipe; the other end of the inert gas pipe extends into the air inlet pipe and the end is connected to the nozzle. At the same time, inert gas and concentrated sulfuric acid are supplied to the nozzle, and the gas pressure of the inert gas enables the concentrated sulfuric acid to be sprayed out at the nozzle and atomized better.

[0010] Preferably, a first regulating valve is installed on the sulfuric acid pipe, and a second regulating valve is installed on the inert gas pipe. The first regulating valve can adjust the flow of concentrated sulfuric acid in the sulfuric acid pipe, and the second regulating valve can adjust the flow of inert gas. The flow of concentrated sulfuric acid and the flow of inert gas can be adjusted according to the needs of cleaning the filter element.

[0011] Preferably, flow meters are installed on the sulfuric acid pipe and the inert gas pipe, so that the flow rates of concentrated sulfuric acid and inert gas can be intuitively known through the flow meters.

[0012] Preferably, a differential pressure gauge is connected between the outlet pipe and the inlet pipe, and the differential pressure gauge is used to measure the pressure difference between the outlet pipe and the inlet pipe. The blockage degree of the filter element of the acid mist collector can be known according to the pressure difference. When the pressure difference is large, the supply of concentrated sulfuric acid can be increased to speed up the washing of the filter element.

[0013] Preferably, a controller is further included, and the controller is communicatively connected with the pressure differential gauge, the first regulating valve, the second regulating valve and the flow meter. The first regulating valve and the second regulating valve are both solenoid valves, and the controller can adjust the opening of the first regulating valve and the second regulating valve according to different pressure data of the pressure differential gauge, thereby controlling the flow of the sulfuric acid pipe and the inert gas and obtaining numerical feedback through the flow meter.

[0014] Preferably, the diameters of the sulfuric acid pipe and the inert gas pipe are both smaller than the diameter of the air inlet pipe. The supply of concentrated sulfuric acid only needs to be small, so the pipe diameter is set smaller than the diameter of the air inlet pipe. The sulfuric acid of the small diameter will also diffuse when entering the large diameter pipe after being sprayed from the nozzle, so that the atomized concentrated sulfuric acid and chlorine gas can be mixed better.

[0015] Preferably, the diameters of the sulfuric acid tube and the inert gas tube are 0.9-1.2 cm; the diameter of the air inlet pipe is 400-650 cm.

[0016] Compared with the prior art, the utility model has the following beneficial effects: by injecting atomized concentrated sulfuric acid into the air intake pipe, the concentrated sulfuric acid can dissolve ferrous sulfate, TOC and acid mud adhering to the filter element of the acid mist collector, thereby washing the acid mist collector, achieving the purpose of reducing the operating pressure difference, and solving the problem of increased pressure difference caused by filter element blockage. At the same time, the system does not need to modify the acid mist collector, but only needs to install and improve the sulfuric acid pipe at the air intake pipe. The overall system structure is simpler and convenient for modification and installation, and the modification and installation difficulty is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of Example 1 of an acid mist collector system with adjustable pressure difference of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the nozzle of the utility model;

[0019] Figure 3 It is a schematic diagram of Example 2 of an acid mist collector system with adjustable pressure difference of the utility model. DETAILED DESCRIPTION

[0020] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0021] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] The technical solution of the utility model is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0023] Example 1

[0024] like Figure 1 and 2 The embodiment 1 of an acid mist collector system with adjustable pressure difference is shown, comprising an acid mist collector 1, an air inlet pipe 2 connected to the air inlet end of the acid mist collector 1, an air outlet pipe 3 connected to the air outlet end of the acid mist collector 1, and a sulfuric acid pipe 4 connected to the air outlet pipe 3, one end of the sulfuric acid pipe 4 extends into the air inlet pipe 2 and an atomizer 5 is installed at the end, and the other end of the sulfuric acid pipe 4 is connected to a concentrated sulfuric acid supply device. The concentrated sulfuric acid supply device can be a tank body filled with concentrated sulfuric acid or a device for concentrated sulfuric acid produced in a pre-process.

[0025] The atomizer 5 is a nozzle, and the direction of the nozzle is perpendicular to the axis of the air inlet pipe 2. Concentrated sulfuric acid is sprayed through the small-aperture nozzle of the nozzle. Since the spraying direction of the concentrated sulfuric acid is perpendicular to the flow direction of the chlorine, it can be more evenly mixed with the chlorine.

[0026] Specifically, it also includes an inert gas pipe 6 and a gas supply device connected to one end of the inert gas pipe 6; the other end of the inert gas pipe 6 extends into the air inlet pipe 2 and the end is connected to the nozzle. At the same time, the inert gas and concentrated sulfuric acid are supplied to the nozzle, and the gas pressure of the inert gas enables the concentrated sulfuric acid to be sprayed out at the nozzle and atomized better. In this embodiment, the inert gas is nitrogen.

[0027] Further, a first regulating valve 7 is installed on the sulfuric acid pipe 4, and a second regulating valve 8 is installed on the inert gas pipe 6. The flow of concentrated sulfuric acid in the sulfuric acid pipe 4 can be adjusted by the first regulating valve 7, and the flow of the inert gas can be adjusted by the second regulating valve 8. The flow of concentrated sulfuric acid and the flow of inert gas can be adjusted according to the demand for cleaning the filter element. In the present embodiment, a flow meter 9 is installed on both the sulfuric acid pipe 4 and the inert gas pipe 6. The flow of concentrated sulfuric acid and the inert gas is intuitively known by the flow meter 9.

[0028] The working principle of this embodiment is as follows: chlorine enters the acid mist trap 1 through the air inlet pipe 2 for filtration, and sulfate acid mist and impurities contained in the chlorine will be retained by the filter element of the acid mist trap 1, and the filtered chlorine is discharged through the air outlet pipe 3. When the chlorine is inhaled, the concentrated sulfuric acid supply device is opened to supply concentrated sulfuric acid to the nozzle through the sulfuric acid pipe 4, and the inert gas supply device is also opened to supply nitrogen to the nozzle through the inert gas pipe 6, so that the nitrogen and concentrated sulfuric acid converge at the nozzle, and the concentrated sulfuric acid is atomized under the action of nitrogen and mixed with the chlorine in the air inlet pipe 2, and the concentrated sulfuric acid in the chlorine forms concentrated sulfuric acid droplets on the surface of the filter element of the acid mist trap 1, which are gathered and flow downward, and the ferrous sulfate, TOC and acid mud adhering to the filter element of the acid mist trap 1 are dissolved by the concentrated sulfuric acid, so that the acid mist trap 1 can be washed. In addition, the original sulfate concentration in chlorine is low and cannot be completely filtered out by the filter element. However, by increasing the sulfuric acid content in chlorine, the filtering effect of the filter element is improved and the filtered chlorine is purer.

[0029] The beneficial effects of this embodiment are as follows: by injecting atomized concentrated sulfuric acid into the air inlet pipe 2, the concentrated sulfuric acid can dissolve the ferrous sulfate, TOC and acid mud adhering to the filter element of the acid mist collector 1, thereby washing the acid mist collector 1, thereby achieving the purpose of reducing the operating pressure difference and solving the problem of increased pressure difference caused by filter element blockage. At the same time, the system does not need to modify the acid mist collector 1, and only needs to install and improve the sulfuric acid pipe 4 at the air inlet pipe 2, and the overall system structure is simpler.

[0030] Example 2

[0031] like Figure 3 The embodiment 2 of an acid mist collector system with adjustable pressure difference is shown, comprising an acid mist collector 1, an air inlet pipe 2 connected to the air inlet end of the acid mist collector 1, an air outlet pipe 3 connected to the air outlet end of the acid mist collector 1, and a sulfuric acid pipe 4 connected to the air outlet pipe 3, one end of the sulfuric acid pipe 4 extends into the air inlet pipe 2 and an atomizer 5 is installed at the end, and the other end of the sulfuric acid pipe 4 is connected to a concentrated sulfuric acid supply device. The concentrated sulfuric acid supply device can be a tank body filled with concentrated sulfuric acid or a device for concentrated sulfuric acid produced in a pre-process.

[0032] The atomizer 5 is a nozzle, and the direction of the nozzle is perpendicular to the axis of the air inlet pipe 2. Concentrated sulfuric acid is sprayed through the small-aperture nozzle of the nozzle. Since the spraying direction of the concentrated sulfuric acid is perpendicular to the flow direction of the chlorine, it can be more evenly mixed with the chlorine.

[0033] Specifically, it also includes an inert gas pipe 6 and a gas supply device connected to one end of the inert gas pipe 6; the other end of the inert gas pipe 6 extends into the air inlet pipe 2 and the end is connected to the nozzle. At the same time, the inert gas and concentrated sulfuric acid are supplied to the nozzle, and the gas pressure of the inert gas enables the concentrated sulfuric acid to be sprayed out at the nozzle and atomized better. In this embodiment, the inert gas is nitrogen.

[0034] In this embodiment, a pressure gauge 10 is connected between the outlet pipe 3 and the inlet pipe 2, and the pressure gauge 10 is used to measure the pressure difference between the outlet pipe 3 and the inlet pipe 2. A first regulating valve 7 is installed on the sulfuric acid pipe 4, and a second regulating valve 8 is installed on the inert gas pipe 6, both of which are solenoid valves. A flow meter 9 is installed on the sulfuric acid pipe 4 and the inert gas pipe 6. The pressure gauge 10, the first regulating valve 7, the second regulating valve 8 and the flow meter 9 are all connected to the controller 11 for communication.

[0035] The working principle of this embodiment is as follows: chlorine enters the acid mist collector 1 through the air inlet pipe 2 for filtration, and sulfate mist and impurities contained in the chlorine will be intercepted by the filter element of the acid mist collector 1, and the filtered chlorine will be discharged through the air outlet pipe 3. In the process of filtering chlorine by the acid mist collector 1, since the filter element will be blocked, the pressure value appearing on the pressure gauge 10 is the pressure difference between the air inlet pipe 2 and the air outlet pipe 3. After receiving the pressure value, the controller 11 opens the first regulating valve 7 and the second regulating valve 8, allowing the concentrated sulfuric acid supply device to supply concentrated sulfuric acid to the nozzle through the sulfuric acid pipe 4, and also allowing the inert gas supply device to supply nitrogen to the nozzle through the inert gas pipe 6, so that the nitrogen and concentrated sulfuric acid converge at the nozzle, and the flow rate of the concentrated sulfuric acid and nitrogen is detected in real time by the flow meter 9. Concentrated sulfuric acid is atomized under the action of nitrogen and mixed with chlorine in the air inlet pipe 2. The concentrated sulfuric acid in the chlorine forms concentrated sulfuric acid droplets on the surface of the filter element of the acid mist collector 1 and flows downward. The concentrated sulfuric acid dissolves the ferrous sulfate, TOC and acid mud adhering to the filter element of the acid mist collector 1, thereby washing the acid mist collector 1. In addition, the concentration of sulfate ions originally contained in the chlorine is low, and the filter element cannot be completely filtered during filtration. By increasing the content of sulfuric acid in the chlorine, the filtering effect of the filter element is improved, and the filtered chlorine is purer.

[0036] In this embodiment, the openings of the first regulating valve 7 and the second regulating valve 8 and the openings of concentrated sulfuric acid and nitrogen can be set corresponding to different pressure values, so that the supply of concentrated sulfuric acid can be automatically increased or decreased according to the blockage degree of the filter element.

[0037] The beneficial effects of this embodiment are as follows: atomized concentrated sulfuric acid is injected into the air intake pipe 2 according to the pressure difference, and the ferrous sulfate, TOC and acid mud adhering to the filter element of the acid mist collector 1 are dissolved by the concentrated sulfuric acid, so that the acid mist collector 1 can be washed, thereby achieving the purpose of reducing the operating pressure difference and solving the problem of increased pressure difference caused by filter element blockage. At the same time, the system does not need to modify the acid mist collector 1, and only needs to install and improve the sulfuric acid pipe 4 at the air intake pipe 2. The overall system structure is simpler and convenient for modification and installation, and the difficulty of modification and installation is low.

[0038] Example 3

[0039] Embodiment 3 of an acid mist collector system with adjustable pressure difference is different from Embodiment 1 or 2 in that the diameters of the sulfuric acid pipe and the inert gas pipe 6 are both smaller than the diameter of the air inlet pipe 2. The supply of concentrated sulfuric acid only needs to be sold, so the diameter is set smaller than the diameter of the air inlet pipe 2. The sulfuric acid pipe 4 with a small diameter will also diffuse when it enters the large diameter after being sprayed from the nozzle, so that the mixing effect of the atomized concentrated sulfuric acid and chlorine is better. Specifically, the diameters of the sulfuric acid pipe and the inert gas pipe 6 are 1 cm; the diameter of the air inlet pipe 2 is 600 cm.

[0040] The rest of the working principles and effects of this embodiment are consistent with those of Embodiment 1 or 2.

[0041] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An acid mist collector system with adjustable pressure difference, comprising an acid mist collector (1), an air inlet pipe (2) connected to the air inlet end of the acid mist collector (1), and an air outlet pipe (3) connected to the air outlet end of the acid mist collector (1), characterized in that: It also includes a sulfuric acid pipe (4) connected to the air outlet pipe (3), one end of the sulfuric acid pipe (4) extends into the air inlet pipe (2) and an atomizer (5) is installed at the end, and the other end of the sulfuric acid pipe (4) is connected to a concentrated sulfuric acid supply device.

2. The acid mist collector system with adjustable pressure difference according to claim 1, characterized in that: The atomizer (5) is a nozzle, and the direction of the nozzle is perpendicular to the axis of the air inlet pipe (2).

3. The acid mist collector system with adjustable pressure difference according to claim 2, characterized in that: It also comprises an inert gas pipe (6) and a gas supply device connected to one end of the inert gas pipe (6); the other end of the inert gas pipe (6) extends into the air inlet pipe (2) and the end is connected to the nozzle.

4. The acid mist collector system with adjustable pressure difference according to claim 3, characterized in that: A first regulating valve (7) is installed on the sulfuric acid pipe (4).

5. The acid mist collector system with adjustable pressure difference according to claim 4, characterized in that: A second regulating valve (8) is installed on the inert gas pipe (6).

6. The acid mist collector system with adjustable pressure difference according to claim 5, characterized in that: Flow meters (9) are installed on both the sulfuric acid pipe (4) and the inert gas pipe (6).

7. The acid mist collector system with adjustable pressure difference according to claim 6, characterized in that: A pressure differential gauge (10) is connected between the air outlet pipe (3) and the air inlet pipe (2), and the pressure differential gauge (10) is used to measure the pressure difference between the air outlet pipe (3) and the air inlet pipe (2).

8. The acid mist collector system with adjustable pressure difference according to claim 7, characterized in that: It also includes a controller (11), wherein the controller (11) is communicatively connected to the differential pressure gauge (10), the first regulating valve (7), the second regulating valve (8) and the flow meter (9).

9. An acid mist collector system with adjustable pressure difference according to any one of claims 3 to 8, characterized in that: The diameters of the sulfuric acid pipe (4) and the inert gas pipe (6) are both smaller than the diameter of the air inlet pipe (2).

10. The acid mist collector system with adjustable pressure difference according to claim 9, characterized in that: The diameters of the sulfuric acid tube (4) and the inert gas tube (6) are 0.9-1.2 cm; the diameter of the air inlet tube (2) is 400-650 cm.

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