Condensed acid collecting system

Abstract

The utility model provides a condensed acid collecting system, which belongs to the technical field of sulfuric acid preparation, and comprises a condensed acid pipeline and two acid liquor collecting mechanisms, each acid liquor collecting mechanism comprises a transfer tank and a collecting tank, the transfer tank is communicated with an acid inlet pipeline and an air inlet pipeline communicated with compressed air, the air inlet pipeline is provided with a first valve, and the collecting tank is provided with a second valve. The collecting tank is communicated with an acid discharge pipeline, the acid discharge pipeline is communicated with the acid inlet pipelines, a second valve is arranged on the acid discharge pipeline, the condensed acid pipeline is connected with the two acid inlet pipelines in parallel through a three-way valve, and a high-level liquid level meter and a low-level liquid level meter are arranged in the collecting tank from top to bottom; the high-level liquid level meter and the low-level liquid level meter are electrically connected with the first valve, the second valve and the three-way valve respectively. According to the condensed acid collecting system provided by the utility model, the two acid liquid collecting mechanisms are switched to collect condensed acid, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sulfuric acid preparation, and more specifically, it relates to a condensed acid collection system. Background Art

[0002] Condensed acid is mainly formed during industrial production processes. When certain components in the gas condense due to a decrease in temperature, and these components may contain acidic substances, thus forming acidic condensate on the surface of heat exchangers or other condensation equipment. For example, in the process of sulfuric acid production from sulfur, sulfur burns to form sulfur dioxide, sulfur dioxide is further oxidized to form sulfur trioxide, and sulfur trioxide combines with water vapor in the condensation tower to form sulfuric acid. Since this process occurs at low temperatures, condensed acid will be formed.

[0003] To avoid environmental pollution caused by the direct discharge of condensed acid, it is usually necessary to concentrate the condensed acid, and after recycling treatment, it is discharged. In the prior art, the acid discharge pipe is usually connected to the collection tank. When the collection tank is full, the acid discharge pipe is closed, and after replacing the new collection tank, the acid discharge pipe is reopened for collection. The condensed acid cannot be continuously collected, and the efficiency is not high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a condensed acid collection system, aiming to solve the problems that the condensed acid cannot be continuously collected and the efficiency is not high.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a condensed acid collection system, including a condensed acid pipe and two acid liquid collection mechanisms. The acid liquid collection mechanism includes a transfer tank and a collection tank. An acid inlet pipe and an air inlet pipe connected to compressed air are communicated with the transfer tank. A first valve is arranged on the air inlet pipe. A drain pipe is communicated with the collection tank, and the drain pipe is communicated with the acid inlet pipe. A second valve is arranged on the drain pipe. The condensed acid pipe is connected in parallel to the two acid inlet pipes through a three-way valve. A high-level liquid level gauge and a low-level liquid level gauge are arranged in the collection tank from top to bottom, and the high-level liquid level gauge and the low-level liquid level gauge are electrically connected to the first valve, the second valve, and the three-way valve respectively.

[0006] In a possible implementation manner, the lower end of the acid inlet pipe is located at the bottom of the inner cavity of the transfer tank, and the lower end of the air inlet pipe is located at the top of the inner cavity of the transfer tank.

[0007] In a possible implementation manner, a heat preservation sleeve is arranged around the outer periphery of the collection tank. The heat preservation sleeve has a heat preservation cavity inside. A tangential inlet pipe is arranged at the lower part of the heat preservation sleeve, and a tangential discharge pipe is arranged at the upper part of the heat preservation sleeve. The tangential inlet pipe and the tangential discharge pipe are both communicated with the heat preservation cavity.

[0008] In a possible implementation, the acid drainage pipe is connected to the middle of the upper end of the collection tank, and a liquid drainage pipe is connected to the middle of the lower end of the collection tank. An opening and closing valve is arranged on the liquid drainage pipe.

[0009] In a possible implementation, a shunt component is installed at the top of the inner cavity of the collection tank. A filter screen is arranged below the shunt component. The upper end of the shunt component is communicated with the acid drainage pipe. The shunt component is used to disperse the condensed acid in the inner cavity of the collection tank.

[0010] In a possible implementation, the shunt component includes a conical cover and a shunt disk. The upper port of the conical cover is connected to the acid drainage pipe. The shunt disk is detachably connected to the lower port of the conical cover. A plurality of shunt holes are evenly arranged on the shunt disk. The inner diameter of the conical cover increases from top to bottom. A shunt cone is arranged in the middle of the inner cavity of the shunt disk. The outer diameter of the shunt cone increases from top to bottom.

[0011] In a possible implementation, the shunt disk is an arc-shaped disk with a convex middle part downward.

[0012] In a possible implementation, the collection tank includes a lower tank body and an upper cover body. The lower tank body and the upper cover body are connected by a flange. The filter screen is press-fitted between the two flanges.

[0013] The beneficial effect of a condensed acid collection system provided by the present utility model is as follows: Compared with the prior art, the three-way valve is first in a state where the condensed acid pipeline is communicated with the acid inlet pipeline of the first acid liquid collection mechanism. The acid inlet pipeline discharges condensed acid into the transfer tank. The first valve and the second valve of the first acid liquid collection mechanism are in a closed state. The condensed acid in the condensed acid pipeline continuously injects into the transfer tank until the liquid level of the condensed acid in the transfer tank reaches the high-level sensor. Then the three-way valve changes its direction to be communicated with the acid inlet pipeline of the second acid liquid collection mechanism. At the same time, the first valve and the second valve of the first acid liquid collection mechanism are opened. The compressed air in the air inlet pipeline enters the transfer tank, and the condensed acid in the transfer tank is pressed into the collection tank through the acid drainage pipe. As the liquid level of the condensed acid in the transfer tank decreases and then reaches the low-level sensor, the first valve and the second valve are closed, and the three-way valve changes its direction again to be communicated with the acid inlet pipeline of the first acid liquid collection mechanism to continue collecting condensed acid. When the transfer tank in the first acid liquid collection mechanism transfers condensed acid to the collection tank, the transfer tank in the second acid liquid collection mechanism continuously collects condensed acid. The second acid liquid collection mechanism repeats the above process, so that the two acid liquid collection mechanisms switch to collect condensed acid, improving the production efficiency. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 Structural schematic diagram of a condensate acid collection system provided by the present invention;

[0016] Figure 2 Structural schematic diagram of a transfer tank provided by the present invention;

[0017] Figure 3 Structural schematic diagram of a collection tank provided by the present invention;

[0018] Figure 4 Structural schematic diagram of a flow splitting component provided by the present invention.

[0019] In the figure: 1, condensate acid pipeline; 2, transfer tank; 3, collection tank; 4, acid inlet pipeline; 5, air inlet pipeline; 6, first valve; 7, acid discharge pipeline; 8, second valve; 9, three-way valve; 10, high-level liquid level gauge; 11, low-level liquid level gauge; 12, heat preservation sleeve; 13, tangential inlet pipe; 14, tangential discharge pipe; 15, liquid discharge pipeline; 16, opening and closing valve; 17, filter screen; 18, conical cover; 19, flow splitting disc; 20, flow splitting hole; 21, flow splitting cone; 22, lower tank body; 23, upper cover body; 24, flange; 25, support leg. Detailed implementation manners

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clear and understandable, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] In the claims, description and above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., they are all used to distinguish different objects and not for describing a specific order.

[0022] In the claims, description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, for orientation terms, such as the use of terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or position relationship are based on the orientation and position relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present utility model.

[0023] Please refer to Figure 1 and Figure 2 , and a condensation acid collection system provided by the present utility model will be described below. A condensation acid collection system includes a condensation acid pipeline 1 and two acid liquid collection mechanisms. The acid liquid collection mechanism includes a transfer tank 2 and a collection tank 3. An acid inlet pipeline 4 and an air inlet pipeline 5 connected to compressed air are communicated on the transfer tank 2. A first valve 6 is arranged on the air inlet pipeline 5. A drain acid pipeline 7 is communicated on the collection tank 3. The drain acid pipeline 7 is communicated with the acid inlet pipeline 4. A second valve 8 is arranged on the drain acid pipeline 7. The condensation acid pipeline 1 is connected in parallel with two acid inlet pipelines 4 through a three-way valve 9. A high-level liquid level gauge 10 and a low-level liquid level gauge 11 are arranged in the collection tank 3 from top to bottom. The high-level liquid level gauge 10 and the low-level liquid level gauge 11 are electrically connected to the first valve 6, the second valve 8 and the three-way valve 9 respectively.

[0024] For a condensation acid collection system provided by the present utility model, compared with the prior art, the three-way valve 9 is first in a state where the condensation acid pipeline 1 is communicated with the acid inlet pipeline 4 of the first acid liquid collection mechanism. The acid inlet pipeline 4 discharges condensation acid into the transfer tank 2. The first valve 6 and the second valve 8 of the first acid liquid collection mechanism are in a closed state. The condensation acid in the condensation acid pipeline 1 is continuously injected into the transfer tank 2 until the liquid level of the condensation acid in the transfer tank 2 reaches the high-level sensor. Then the three-way valve 9 changes direction to communicate with the acid inlet pipeline 4 of the second acid liquid collection mechanism. At the same time, the first valve 6 and the second valve 8 of the first acid liquid collection mechanism are opened. The compressed air in the air inlet pipeline 5 enters the transfer tank 2, and the condensation acid in the transfer tank 2 is pressed into the collection tank 3 through the drain acid pipeline 7. As the liquid level of the condensation acid in the transfer tank 2 decreases and then reaches the low-level sensor, the first valve 6 and the second valve 8 are closed, and the three-way valve 9 changes direction again to communicate with the acid inlet pipeline 4 of the first acid liquid collection mechanism to continue collecting condensation acid. When the transfer tank 2 in the first acid liquid collection mechanism transfers condensation acid to the collection tank 3, the transfer tank 2 in the second acid liquid collection mechanism continuously collects condensation acid, and the second acid liquid collection mechanism repeats the above process, so that the two acid liquid collection mechanisms switch to collect condensation acid, improving the production efficiency.

[0025] The lower end of the acid inlet pipe 4 is located at the bottom of the inner cavity of the transfer tank 2, and the lower end of the air inlet pipe 5 is located at the top of the inner cavity of the transfer tank 2. When the condensed acid in the transfer tank 2 reaches the position of the high-level liquid sensor, the lower end of the air inlet pipe 5 is above the liquid level of the condensed acid. The compressed gas entering the transfer tank 2 through the air inlet pipe 5 squeezes the condensed acid, causing the condensed acid to enter the collection tank 3 through the acid inlet pipe 4 and the acid discharge pipe 7.

[0026] Please refer to Figure 3 , a heat preservation sleeve 12 is provided around the outside of the collection tank 3. The inside of the heat preservation sleeve 12 has a heat preservation cavity. A tangential inlet pipe 13 is provided at the lower part of the heat preservation sleeve 12, and a tangential discharge pipe 14 is provided at the upper part of the heat preservation sleeve 12. Both the tangential inlet pipe 13 and the tangential discharge pipe 14 are connected to the heat preservation cavity. Refrigerant or heat medium is introduced into the heat preservation cavity of the heat preservation sleeve 12 through the tangential inlet pipe 13, so as to conduct heat to the condensed acid in the collection tank 3, achieving the purpose of heating or cooling the condensed acid. When the temperature of the refrigerant or heat medium in the heat preservation sleeve 12 changes due to heat conduction and no longer meets the requirements of heat conduction, the refrigerant or heat medium can be discharged through the tangential discharge pipe 14.

[0027] The acid discharge pipe 7 is connected to the middle of the upper end of the collection tank 3. A liquid discharge pipe 15 is connected to the middle of the lower end of the collection tank 3, and a switch valve 16 is provided on the liquid discharge pipe 15. When enough condensed acid is collected in the collection tank 3, the above-mentioned switch valve 16 is opened, and the liquid discharge pipe 15 is used to discharge the condensed acid for reuse treatment.

[0028] In addition, a flow splitting component is installed at the top of the inner cavity of the collection tank 3. A filter screen 17 is provided below the flow splitting component. The upper end of the flow splitting component is connected to the acid discharge pipe 7. The flow splitting component is used to disperse the condensed acid in the inner cavity of the collection tank 3. After being dispersed, the condensed acid will contact the filter screen 17 as comprehensively as possible in terms of area, improving the filtering effect.

[0029] Please refer to Figure 4, the shunt component includes a conical cover 18 and a shunt disk 19. The upper port of the conical cover 18 is connected to the acid discharge pipe 7. The shunt disk 19 is detachably connected to the lower port of the conical cover 18. A plurality of shunt holes 20 are evenly formed in the shunt disk 19. The inner diameter of the conical cover 18 increases from top to bottom. A shunt cone 21 is arranged in the middle of the inner cavity of the shunt disk 19, and the outer diameter of the shunt cone 21 increases from top to bottom. The upper port of the conical cover 18 has an external thread for threaded installation on the top of the inner cavity of the collection tank 3. A sealing ring is provided inside the upper port of the conical cover 18. The acid discharge pipe 7 is inserted into the upper port of the conical cover 18 and is in sealing fit. The shunt cone 21 is of a shell structure, and a plurality of connecting rods are arranged circumferentially on the outer conical surface. The plurality of connecting rods are circumferentially connected to the inner peripheral wall of the conical cover 18, so as to keep the shunt cone 21 stable. In addition, a support column is horizontally connected inside the shunt cone 21, which can keep the shunt cone 21 stable in its own structure. The condensed acid entering the conical cover 18 from the acid discharge pipe 7 diffuses outward under the shunt of the shunt cone 21 and finally leaves through the plurality of shunt holes 20 in the shunt disk 19, so that the separated sulfuric acid contacts the filter screen 17 as comprehensively as possible in terms of area.

[0030] Preferably, the shunt disk 19 is an arc-shaped disk protruding downward in the middle, and the axial directions of the plurality of shunt holes 20 are perpendicular to the end face of the arc-shaped disk, so that the plurality of shunt holes 20 are in a state of dispersing outward, which is beneficial to dispersing the condensed acid.

[0031] Specifically, the collection tank 3 includes a lower tank body 22 and an upper cover body 23. A plurality of support legs 25 are arranged at the bottom of the lower tank body 22 to stabilize the collection tank 3. The lower tank body 22 and the upper cover body 23 are connected by a flange 24. Corresponding card slots are formed on the end faces of the flange 24 of the lower tank body 22 and the flange 24 of the upper cover body 23. When the two flanges 24 are connected to each other, the filter screen 17 is press-fitted into the card slot between the two flanges 24, which is convenient for the disassembly and replacement of the filter screen 17.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A condensate acid collection system, characterized in that, It includes a condensate acid pipeline (1) and two acid liquid collection mechanisms. The acid liquid collection mechanism includes a transfer tank (2) and a collection tank (3). An acid inlet pipeline (4) and an air inlet pipeline (5) connected to compressed air are communicated on the transfer tank (2). A first valve (6) is arranged on the air inlet pipeline (5). A drain acid pipeline (7) is communicated on the collection tank (3). The drain acid pipeline (7) is communicated with the acid inlet pipeline (4). A second valve (8) is arranged on the drain acid pipeline (7). The condensate acid pipeline (1) is connected in parallel with two acid inlet pipelines (4) through a three-way valve (9). A high-level liquid level gauge (10) and a low-level liquid level gauge (11) are arranged in the collection tank (3) from top to bottom. The high-level liquid level gauge (10) and the low-level liquid level gauge (11) are electrically connected to the first valve (6), the second valve (8), and the three-way valve (9) respectively.

2. The condensation acid collection system according to claim 1, wherein The lower end of the acid inlet pipeline (4) is located at the bottom of the inner cavity of the transfer tank (2), and the lower end of the air inlet pipeline (5) is located at the top of the inner cavity of the transfer tank (2).

3. The condensate acid collection system according to claim 1, wherein A heat preservation sleeve (12) is arranged around the outer periphery of the collection tank (3). The heat preservation sleeve (12) has a heat preservation cavity inside. A tangential inlet pipe (13) is arranged at the lower part of the heat preservation sleeve (12), and a tangential discharge pipe (14) is arranged at the upper part of the heat preservation sleeve (12). The tangential inlet pipe (13) and the tangential discharge pipe (14) are both communicated with the heat preservation cavity.

4. The condensate acid collection system according to claim 1, wherein The drain acid pipeline (7) is connected to the middle of the upper end of the collection tank (3). A drain liquid pipeline (15) is connected to the middle of the lower end of the collection tank (3). An opening and closing valve (16) is arranged on the drain liquid pipeline (15).

5. The condensate acid collection system according to claim 1, wherein, A flow splitting component is installed at the top of the inner cavity of the collection tank (3). A filter screen (17) is arranged below the flow splitting component. The upper end of the flow splitting component is communicated with the drain acid pipeline (7). The flow splitting component is used to disperse the condensate acid in the inner cavity of the collection tank (3).

6. The condensing acid collection system according to claim 5, wherein The flow splitting component includes a conical cover (18) and a flow splitting disk (19). The upper port of the conical cover (18) is connected to the drain acid pipeline (7). The flow splitting disk (19) is detachably connected to the lower port of the conical cover (18). A plurality of flow splitting holes (20) are evenly arranged on the flow splitting disk (19). The inner diameter of the conical cover (18) increases from top to bottom. A flow splitting cone (21) is arranged in the middle of the inner cavity of the flow splitting disk (19). The outer diameter of the flow splitting cone (21) increases from top to bottom.

7. The condensate acid collection system according to claim 6, wherein The flow splitting disk (19) is an arc-shaped disk protruding downward in the middle.

8. The condensation acid collection system according to claim 5, characterized in that, The collection tank (3) includes a lower tank body (22) and an upper cover body (23). The lower tank body (22) and the upper cover body (23) are connected through a flange (24). The filter screen (17) is press-fitted between the two flanges (24).

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