A condensate acid automatic recovery device based on pipeline liquid level triggering

Abstract

The utility model relates to the field of chemical equipment environmental protection and safety technology, concretely relates to a kind of condensing acid automatic recovery device based on pipeline liquid level triggering, including collection tank and several cold acid detection mechanisms, each cold acid detection mechanism includes condensate pipe and No. 1 liquid level meter, condensate pipe is vertically arranged, and its lower end is connected with inclined upward liquid discharge branch pipe, collection tank is vertically arranged and located below several cold acid detection mechanisms, condensate pipe is connected with collection tank by liquid guide pipe, the lower end of condensate pipe is equipped with open-close actuator for controlling condensing acid discharge, the bottom of collection tank is connected with acid discharge pipe, and the acid discharge pipe is equipped with acid discharge actuator, the utility model is through the real-time linkage of No. 1 liquid level meter and central control unit, cooperate the automatic start-stop of electric ball valve, realize the automatic discharge of condensing acid, and whole-process unmanned intervention control, avoid the malfunction caused by liquid level fluctuation, fundamentally replace manual acid operation, reduce safety risk to a minimum.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection and safety technology for chemical equipment, specifically to an automatic condensed acid recovery device based on pipeline liquid level triggering. Background Technology

[0002] Throughout the entire lifecycle of the sulfur conversion unit, including start-up, shutdown, and normal production phases, the water vapor in the furnace gas readily condenses into highly corrosive acid condensate when it comes into contact with low-temperature pipelines and related equipment. Pipelines and equipment in economizers I / II, the heat exchanger tube layers, and the low-temperature flue gas heat exchanger shell layer are particularly prone to acid condensation due to their low operating temperatures.

[0003] In existing processes, the discharge and collection of such condensed acid generally adopts the traditional method of "artificial atmospheric discharge + drum collection." This method has many drawbacks that urgently need to be addressed: First, condensed acid tends to accumulate in pipelines over a long period of time, and its strong corrosiveness can severely erode the equipment and pipeline walls, leading to a shortened equipment lifespan and an increased risk of leakage. This not only increases equipment maintenance costs but may also cause production interruptions. Second, during artificial atmospheric discharge, acidic fumes can easily spread to the surrounding environment, causing air pollution and violating the environmental protection requirements of chemical production. Third, operators need to frequently handle acid-related operations. In the stages of condensed acid discharge and drum transfer, the probability of safety accidents such as acid burns is significantly increased, posing a serious threat to the personal safety of operators. Utility Model Content

[0004] The purpose of this invention is to provide an automatic condensate acid recovery device based on pipeline liquid level triggering.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An automatic condensate acid recovery device based on pipeline liquid level triggering includes a collection tank and several cold acid detection mechanisms. Each cold acid detection mechanism includes a condensate pipe and a level gauge. The condensate pipe is vertically arranged and its lower end is connected to an upwardly inclined drain branch pipe. The collection tank is vertically arranged and located below the several cold acid detection mechanisms. The condensate pipe is connected to the collection tank through a liquid guide pipe. The lower end of the condensate pipe is equipped with an opening and closing actuator to control the discharge of condensate acid. The bottom of the collection tank is connected to an acid discharge pipe, and the acid discharge pipe is equipped with an acid discharge actuator to control the discharge of acid.

[0007] In order to maintain the low temperature of the condensing acid entering the condensate pipe, the condensate pipe has a double-layer structure with an inner and outer layer, and an annular water cavity is provided between its inner and outer walls. The upper and lower ends of the condensate pipe are respectively provided with a cold water inlet and a warm water outlet, and both the cold water inlet and the warm water outlet are connected to the annular water cavity.

[0008] To demonstrate the specific structure of the opening and closing actuator, the actuator is an electric ball valve. The inlet of the electric ball valve is connected to the lower end of the condensate pipe, and the upper end of the liquid guide pipe is connected to the outlet of the electric ball valve.

[0009] To prevent particulate impurities in the condensate pipe from entering the collection tank along with the condensed acid, the collection tank is provided with an inlet at the top. The inlet is fixedly equipped with a sealing end cap, and the sealing end cap is provided with a vertically upward inlet pipe. A vertically arranged filter cylinder is fixedly connected to the bottom of the sealing end cap. The lower end of the inlet pipe is connected to the filter cylinder, and the lower end of the guide pipe is connected to the inlet pipe.

[0010] In order to enable real-time detection of the amount of condensed acid collected in the collection tank, a vertical No. 2 level gauge is fixedly installed on the top of the collection tank.

[0011] To demonstrate the specific structure of the acid discharge actuator, the acid discharge actuator is an acid discharge pump, and the inlet of the acid discharge pump is connected to the acid discharge pipe.

[0012] To demonstrate how the collection tank is installed, several evenly distributed support feet are provided on the outer wall of the lower end of the collection tank.

[0013] To demonstrate how to control the opening / closing actuator and the acid discharge actuator, a central control unit is provided next to several of the cold acid detection mechanisms, and the opening / closing actuator and the acid discharge actuator are electrically connected to the central control unit.

[0014] The beneficial effects of this utility model are:

[0015] Firstly, this utility model achieves automatic discharge of condensed acid through real-time linkage between the No. 1 level gauge and the central control unit, combined with the automatic start and stop of the electric ball valve. Moreover, the entire process is unmanned, avoiding malfunctions caused by level fluctuations, fundamentally replacing manual acid handling operations, and minimizing safety risks.

[0016] Secondly, this utility model ensures timely discharge of condensed acid through real-time liquid level monitoring, preventing acid from stagnating in the pipelines of key equipment such as economizers and heat exchangers. On the other hand, it works in conjunction with the annular water chamber on the condensate pipe to ensure that the acid is always in a low-temperature liquid state, making it easy to collect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2for Figure 1 A magnified view of the area indicated by A1 in the diagram;

[0020] Figure 3 This is a top view of the present invention;

[0021] Figure 4 for Figure 3 Sectional view along line AA;

[0022] Figure 5 An exploded view of the three-dimensional structure of the sealed end cap and the collection tank.

[0023] In the diagram: 1. Collection tank; 2. Condensate pipe; 3. Level gauge No. 1; 4. Drain branch pipe; 5. Guide pipe; 6. Acid drain pipe; 7. Annular water chamber; 8. Cold water inlet; 9. Warm water outlet; 10. Electric ball valve; 11. Liquid inlet; 12. Sealing end cap; 13. Liquid inlet pipe; 14. Filter cartridge; 15. Level gauge No. 2; 16. Acid drain pump; 17. Support foot. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0026] refer to Figure 1 and Figure 2 The illustrated automatic condensate recovery device based on pipeline liquid level triggering includes a collection tank 1 and several cold acid detection mechanisms. Each cold acid detection mechanism includes a condensate pipe 2 and a level gauge 3. The condensate pipe 2 is vertically arranged and its lower end is connected to an upwardly inclined drain branch pipe 4. The collection tank 1 is vertically arranged and located below the several cold acid detection mechanisms. The condensate pipe 2 is connected to the collection tank 1 through a liquid guide pipe 5. The lower end of the condensate pipe 2 is equipped with an opening and closing actuator to control the discharge of condensate. The bottom of the collection tank 1 is connected to an acid discharge pipe 6, and the acid discharge pipe 6 is equipped with an acid discharge actuator to control the discharge of acid.

[0027] In actual use, several condensate pipes 2 correspond to the upstream economizer, heat exchange tubes, and low-temperature flue gas heat exchanger, respectively, and several drain branch pipes 4 are connected to the upstream economizer, heat exchange tubes, and low-temperature flue gas heat exchanger, respectively. During the entire life cycle operation of the sulfur conversion unit, the water vapor contained in the furnace gas easily condenses into highly corrosive condensate acid when it comes into contact with the low-temperature pipeline. The generated condensate acid flows downward into the condensate pipes 2 through the drain branch pipes 4. As the amount of condensate acid increases, the acid level in the condensate pipes 2 gradually rises. When the No. 1 level gauge 3 detects the acid, the valve opens and closes. The actuator will immediately open the lower end of the condensate pipe 2, so that the condensed acid in the condensate pipe 2 will flow into the collection tank 1 through the liquid guide pipe 5. The collection tank 1 will collect the condensed acid generated by the economizer, the hot and cold heat exchange tubes and the low temperature flue gas heat exchanger. When the condensed acid in the collection tank 1 reaches a certain level, the acid discharge actuator will immediately open the acid discharge pipe 6 to discharge the condensed acid in the collection tank 1. In actual use, the collection tank 1 is located in an underground foundation pit, and an acid tank is opened in the underground foundation pit. The condensed acid discharged from the collection tank 1 will be discharged into the underground acid tank to prevent the condensed acid from polluting the ground environment.

[0028] refer to Figure 2 As shown, the condensate pipe 2 has a double-layer structure with an inner and outer layer, and an annular water cavity 7 is provided between its inner and outer walls. The upper and lower ends of the condensate pipe 2 are respectively provided with a cold water inlet 8 and a warm water outlet 9, and both the cold water inlet 8 and the warm water outlet 9 are connected to the annular water cavity 7.

[0029] In actual use, cooling water flows into the annular water chamber 7 through the cold water inlet 8, thereby cooling the acid in the condensate pipe 2 to ensure that the acid is in a low temperature state. Finally, after heat exchange, the cooling water is discharged through the warm water outlet 9.

[0030] refer to Figure 1 As shown, the opening and closing actuator is an electric ball valve 10. The inlet of the electric ball valve 10 is connected to the lower end of the condensate pipe 2, and the upper end of the liquid guide pipe 5 is connected to the outlet of the electric ball valve 10.

[0031] Before the condensed acid generated by the upstream economizer, the hot and cold heat exchange tubes and the low-temperature flue gas heat exchanger flows into the condensate pipe 2 through the drain branch pipe 4, the electric ball valve 10 is in the closed state. When the level gauge 3 detects the acid in the condensate pipe 2, the electric ball valve 10 will immediately open to allow the acid in the condensate pipe 2 to be discharged to the collection tank 1. When the acid level in the condensate pipe 2 drops, the electric ball valve 10 will close again.

[0032] refer to Figure 1 and Figure 5As shown, the top of the collection tank 1 is provided with a liquid inlet 11, and a sealing end cap 12 is fixedly provided on the liquid inlet 11. The sealing end cap 12 is provided with a vertically upward liquid inlet pipe 13. A vertically arranged filter cylinder 14 is fixedly connected to the bottom of the sealing end cap 12. The lower end of the liquid inlet pipe 13 is connected to the filter cylinder 14, and the lower end of the liquid guide pipe 5 is connected to the liquid inlet pipe 13.

[0033] The acid discharged from the liquid guide pipe 5 flows into the filter cartridge 14 through the liquid inlet pipe 13. The acid is filtered through the filter cartridge 14, and particulate impurities in the acid are trapped in the filter cartridge 14. The acid then flows through the filter cartridge 14 into the collection tank 1, thereby preventing particulate impurities in the condensate pipe 2 from entering the collection tank 1 along with the condensate vortex.

[0034] refer to Figure 1 As shown, a vertically oriented No. 2 level gauge 15 is fixedly installed on the top of the collection tank 1.

[0035] The acid level in the collection tank 1 is monitored in real time by the second level gauge 15. When the second level gauge 15 detects the acid in the collection tank 1, the acid discharge actuator will immediately open the acid discharge pipe 6 to discharge the acid in the collection tank 1.

[0036] refer to Figure 1 As shown, the acid discharge actuator is an acid discharge pump 16, and the inlet of the acid discharge pump 16 is connected to the acid discharge pipe 6.

[0037] When the collection tank 1 collects acid, the acid discharge pump 16 is in the state of closing the acid discharge pipe 6. When the second level gauge 15 detects the acid in the collection tank 1, the acid discharge pump 16 will immediately open and pump out the acid in the collection tank 1. When the acid level in the collection tank 1 drops, the acid discharge pump 16 will close again.

[0038] refer to Figure 1 As shown, the outer wall at the lower end of the collection tank 1 is provided with several evenly distributed support feet 17.

[0039] During installation, the collection tank 1 is installed in the underground pit using several support legs 17. The support legs 17 not only support the collection tank 1, but also keep the bottom of the collection tank 1 from the ground, so as to allow the acid drain pipe 6 to be installed.

[0040] A central control unit is located next to several cold acid detection units, and the opening / closing actuators and acid discharge actuators are electrically connected to the central control unit.

[0041] The central control unit is used to receive the detection signals from level gauge 3 and level gauge 15, and generate instructions to control the opening and closing actuators and the acid discharge actuators based on the received detection signals.

[0042] This device is used to automatically collect and discharge condensed acid. The specific principle is as follows:

[0043] Condensed acid collection trigger: Condensed acid generated by upstream equipment flows into the corresponding condensate pipe 2 through the drain branch pipe 4. Cooling water continuously cools the acid through the annular water chamber 7 of the condensate pipe 2. When the acid level in the condensate pipe 2 rises to the detection range of the first level gauge 3, the first level gauge 3 transmits the signal to the central control unit, and the central control unit immediately commands the electric ball valve 10 to open.

[0044] Acid filtration and collection: Condensed acid flows into the filter cartridge 14 of the collection tank 1 through the liquid guide pipe 5 and the liquid inlet pipe 13. After the filter cartridge 14 filters out particulate impurities in the acid, the pure acid enters the collection tank 1 for storage.

[0045] Automatic acid discharge: When the acid level in collection tank 1 rises to the detection threshold of level gauge 15, level gauge 15 triggers the central control unit, which immediately instructs the acid discharge pump 16 to start, discharging the condensed acid in collection tank 1 into the underground acid tank through the acid discharge pipe 6. After the liquid levels in collection tank 1 and condensate pipe 2 drop, the electric ball valve 10 and the acid discharge pump 16 are closed under the action of the control unit, completing one automatic recycling cycle.

[0046] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An automatic condensate acid recovery device based on pipeline liquid level triggering, characterized in that, The system includes a collection tank (1) and several cold acid detection mechanisms. Each cold acid detection mechanism includes a condensate pipe (2) and a level gauge (3). The condensate pipe (2) is vertically arranged and its lower end is connected to an upwardly inclined drain branch pipe (4). The collection tank (1) is vertically arranged and located below the several cold acid detection mechanisms. The condensate pipe (2) is connected to the collection tank (1) through a liquid guide pipe (5). The lower end of the condensate pipe (2) is provided with an opening and closing actuator to control the discharge of condensed acid. The bottom of the collection tank (1) is connected to an acid discharge pipe (6), and the acid discharge pipe (6) is provided with an acid discharge actuator to control the discharge of acid.

2. The automatic condensate acid recovery device based on pipeline liquid level triggering according to claim 1, characterized in that, The condensate pipe (2) has a double-layer structure with an inner and outer layer, and an annular water cavity (7) is provided between its inner and outer walls. The upper and lower ends of the condensate pipe (2) are respectively provided with a cold water inlet (8) and a warm water outlet (9), and the cold water inlet (8) and the warm water outlet (9) are connected to the annular water cavity (7).

3. The automatic condensate acid recovery device based on pipeline liquid level triggering according to claim 1, characterized in that, The opening and closing actuator is an electric ball valve (10). The inlet of the electric ball valve (10) is connected to the lower end of the condensate pipe (2), and the upper end of the liquid guide pipe (5) is connected to the outlet of the electric ball valve (10).

4. The automatic condensate acid recovery device based on pipeline liquid level triggering according to claim 1, characterized in that, The top of the collection tank (1) is provided with a liquid inlet (11), and the liquid inlet (11) is fixedly provided with a sealing end cap (12). The sealing end cap (12) is provided with a vertically upward liquid inlet pipe (13). The bottom of the sealing end cap (12) is fixedly connected with a vertically arranged filter cylinder (14). The lower end of the liquid inlet pipe (13) is connected to the filter cylinder (14), and the lower end of the liquid guide pipe (5) is connected to the liquid inlet pipe (13).

5. The automatic condensate acid recovery device based on pipeline liquid level triggering according to claim 1, characterized in that, The top of the collection tank (1) is fixed with a vertical No. 2 level gauge (15).

6. The automatic condensate acid recovery device based on pipeline liquid level triggering according to claim 1, characterized in that, The acid discharge actuator is an acid discharge pump (16), and the inlet of the acid discharge pump (16) is connected to the acid discharge pipe (6).

7. The automatic condensate acid recovery device based on pipeline liquid level triggering according to claim 1, characterized in that, The outer wall at the lower end of the collection tank (1) is provided with several evenly distributed support feet (17).

8. The automatic condensate acid recovery device based on pipeline liquid level triggering according to claim 1, characterized in that, A central control unit is provided on the side of several of the aforementioned cold acid detection mechanisms, and the opening / closing actuator and the acid discharge actuator are both electrically connected to the central control unit.

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