Optimized operation system for improving boiler water quality in chemical production

Abstract

The utility model provides an optimized operating system for improving boiler water quality in chemical production, which relates to the technical field of chemical industry, and comprises a gas cooler, a plurality of boiler main bodies are arranged in the gas cooler, third communicating pipes are fixed at the bottom ends of two of the boiler main bodies, a second communicating pipe is arranged below the gas cooler, and the second communicating pipe is communicated with the gas cooler. And the bottom end of the third communicating pipe is communicated with the second communicating pipe. The problem that boiler water is high in conductivity is solved by directly discharging sewage at the low-point position of equipment, during normal operation, a newly-added DN20 first valve keeps a certain opening degree, water in a boiler body in a system is discharged into a low-pressure steam condensate flash tank, in the low-pressure steam condensate flash tank, part of discharged sewage flashes out of low-pressure steam, and in the low-pressure steam condensate flash tank, the low-pressure steam is discharged out of the boiler body. And the other part of the condensate is discharged as condensate through the discharge pipe at the bottom end of the condensate, and the condensate is conveyed to a power workshop to serve as circulating water replenishing water to be recycled.

Description

Technical Field

[0001] This utility model relates to the technical field of the chemical industry, and in particular to an optimized operating system for improving boiler water quality in chemical production. Background Technology

[0002] In chemical production, boilers are key equipment for providing heat energy. Numerous reaction processes in the chemical industry, such as polymerization, distillation, and drying, require significant amounts of heat energy. For example, in petrochemicals, crude oil refining processes, including atmospheric distillation and vacuum distillation, rely on steam generated by boilers to provide heat and separate different components from the crude oil. Boilers convert water into high-temperature, high-pressure steam, which serves as a highly efficient heat energy carrier, meeting the heat energy needs of all stages of chemical production and making it an indispensable piece of equipment for the normal operation of chemical production.

[0003] Currently, in one existing technology for optimizing boiler water quality in chemical production, most phthalic anhydride plants have a blowdown system for the boiler water drum to regulate water quality. However, there is no blowdown system designed in the gas section tube bundle of the heat exchange equipment gas cooler, which leads to the accumulation of impurities such as rust in the pipes. In order to ensure the quality of boiler water, the blowdown volume can only be increased from the drum, resulting in waste of boiler water. Utility Model Content

[0004] The purpose of this invention is to address the problem that while most phthalic anhydride plants in the prior art have a blowdown system for the boiler water drum to regulate water quality, there is no blowdown system designed for the gas section tube bundle of the heat exchange equipment gas cooler. This leads to the accumulation of impurities such as rust in the pipes. In order to ensure the quality of boiler water, the blowdown volume can only be increased from the drum, resulting in waste of boiler water. Therefore, this invention proposes an optimized operating system for improving boiler water quality in chemical production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an optimized operating system for improving boiler water quality in chemical production, comprising a gas cooler, wherein multiple boiler bodies are installed inside the gas cooler, wherein a third connecting pipe is fixed to the bottom end of two of the boiler bodies, a second connecting pipe is provided below the gas cooler, the bottom end of the third connecting pipe is connected to the second connecting pipe, a fourth connecting pipe is fixed to the outer wall of the second connecting pipe, a fifth connecting pipe is installed at the end of the fourth connecting pipe away from the second connecting pipe, a low-pressure steam condensate flash tank is fixed at the end of the fifth connecting pipe away from the fourth connecting pipe, a first valve is installed on the outer wall of the fourth connecting pipe, and two first connecting pipes are fixed to the top end of each boiler body, and a first flange is fixed to the outer wall of the top end of each first connecting pipe.

[0006] Preferably, both the upper and lower ends of the low-pressure steam condensate flash tank are fixed with discharge pipes, and a third flange is fixed to the outer wall of the opposite end of the two discharge pipes. A third control valve is installed on the outer wall of the two discharge pipes.

[0007] Preferably, a liquid outlet pipe is fixed to the bottom end of one of the boiler bodies, a fifth flange is fixed to the outer wall of the end of the liquid outlet pipe away from the boiler body, and a fourth control valve is installed on the outer wall of the liquid outlet pipe.

[0008] Preferably, a second flange is fixed to the outer wall of one of the opposite ends of the fourth and fifth connecting pipes, and the two second flanges are fixed together by bolts.

[0009] Preferably, both ends of the gas cooler are fixed with vent pipes, and the outer walls of the opposite ends of the two vent pipes are fixed with a fourth flange.

[0010] Preferably, the bottom of the low-pressure steam condensate flash tank is fixed with four pillars, and the bottom of each of the four pillars is fixed with a friction plate, and the bottom of the gas cooler is fixed with a bracket.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] In this invention, a DN20 first valve is added at the fourth connecting pipe at the lowest point of the gas cooler, and the valve is led to the low-pressure steam condensate flash tank via a fifth connecting pipe. This direct discharge at the lowest point of the equipment solves the problem of high boiler water conductivity. During normal operation, the newly added DN20 first valve maintains a certain opening, discharging water from the boiler body into the low-pressure steam condensate flash tank. In the flash tank, a portion of the discharged water flashes out as low-pressure steam, which is discharged to the external low-pressure steam network through the top discharge pipe. The remaining portion, as condensate, is discharged through the bottom discharge pipe and sent to the power workshop for reuse as circulating water. After adding this process, boiler water discharge is reduced by more than 40%, significantly saving boiler water consumption. This design also features low investment, convenient operation and adjustment, and enhanced practicality. Attached Figure Description

[0013] Figure 1 A three-dimensional diagram of an optimized operating system for improving boiler water quality in chemical production is provided for this utility model.

[0014] Figure 2 A bottom-view perspective view of an optimized operating system for improving boiler water quality in chemical production, as proposed in this utility model.

[0015] Figure 3This utility model provides a schematic diagram of the external structure of the boiler body for an optimized operating system that improves boiler water quality in chemical production.

[0016] Figure 4 This utility model presents a schematic diagram of the external structure of a low-pressure steam condensate flash tank for an optimized operating system to improve boiler water quality in chemical production.

[0017] Legend: 1. Gas cooler; 2. Boiler body; 3. First connecting pipe; 4. First flange; 5. Second connecting pipe; 6. Third connecting pipe; 7. Fourth connecting pipe; 8. Fifth connecting pipe; 9. First valve; 10. Second flange; 11. Bolt; 12. Low-pressure steam condensate flash tank; 13. Discharge pipe; 14. Third flange; 15. Third control valve; 16. Support column; 17. Friction plate; 18. Vent pipe; 19. Fourth flange; 20. Liquid outlet pipe; 21. Fifth flange; 22. Fourth control valve; 23. Support frame. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1, as Figure 1-4 As shown, this utility model provides an optimized operating system for improving boiler water quality in chemical production, including a gas cooler 1. Multiple boiler bodies 2 are installed inside the gas cooler 1. Two boiler bodies 2 have a third connecting pipe 6 fixed to their bottom ends. A second connecting pipe 5 is located below the gas cooler 1. The bottom end of the third connecting pipe 6 is connected to the second connecting pipe 5. A fourth connecting pipe 7 is fixed to the outer wall of the second connecting pipe 5. A fifth connecting pipe 8 is installed at the end of the fourth connecting pipe 7 away from the second connecting pipe 5. A low-pressure steam condensate flash tank 12 is fixed to the end of the fifth connecting pipe 8 away from the fourth connecting pipe 7. A first valve 9 is installed on the outer wall of the fourth connecting pipe 7. Two first connecting pipes 3 are fixed to the top of each boiler body 2, and a first flange 4 is fixed to the outer wall of the top of each first connecting pipe 3.

[0021] The overall effect of Embodiment 1 is that by adding a DN20 first valve 9 at the fourth connecting pipe 7 at the lowest point of the gas cooler 1, and leading it to the low-pressure steam condensate flash tank 12 through the fifth connecting pipe 8, the problem of high boiler water conductivity is solved by directly discharging the wastewater at the lowest point of the equipment. During normal operation, the newly added DN20 first valve 9 maintains a certain opening, discharging the water in the boiler body 2 into the low-pressure steam condensate flash tank 12. After adding the above process, the boiler water discharge is reduced by more than 40%, significantly saving boiler water consumption, reducing boiler water usage, and with low investment, convenient operation and adjustment, and enhanced practicality. Through the setting of the first connecting pipe 3 and the second connecting pipe 5, it can be connected to the external boiler water discharge mechanism. Each flange of this device is used to connect to external mechanisms or other pipelines.

[0022] Example 2, as Figure 1-4 As shown, both the upper and lower ends of the low-pressure steam condensate flash tank 12 are fixed with discharge pipes 13. The outer walls of the opposite ends of the two discharge pipes 13 are fixed with third flanges 14. The outer walls of the two discharge pipes 13 are each equipped with a third control valve 15. The bottom end of one of the boiler bodies 2 is fixed with a liquid outlet pipe 20. The outer wall of the end of the liquid outlet pipe 20 away from the boiler body 2 is fixed with a fifth flange 21. The outer wall of the liquid outlet pipe 20 is equipped with a fourth control valve 22. The outer walls of the opposite ends of the fourth connecting pipe 7 and the fifth connecting pipe 8 are each fixed with a second flange 10. The two second flanges 10 are fixed together by bolts 11. Both ends of the gas cooler 1 are fixed with vent pipes 18. The outer walls of the opposite ends of the two vent pipes 18 are each fixed with a fourth flange 19. The bottom end of the low-pressure steam condensate flash tank 12 is fixed with four supports 16. The bottom ends of the four supports 16 are each fixed with a buffing plate 17. The bottom end of the gas cooler 1 is fixed with a bracket 23.

[0023] The effect achieved by the entire embodiment 2 is that, through the setting of bracket 23 and support column 16, the gas cooler 1 and the low-pressure steam condensate flash tank 12 can be stably supported. Through the setting of two discharge pipes 13, a part of the wastewater in the low-pressure steam condensate flash tank 12 can flash out low-pressure steam and be discharged into the external low-pressure steam pipeline network through the discharge pipe 13 at the top. The other part is discharged as condensate through the discharge pipe 13 at the bottom and sent to the power workshop as circulating water for reuse.

[0024] Working Principle: When using this device, a DN20 first valve 9 is added at the fourth connecting pipe 7 at the lowest point of the gas cooler 1. This valve is then led to the low-pressure steam condensate flash tank 12 via the fifth connecting pipe 8. Directly discharging wastewater from the lowest point of the equipment solves the problem of high boiler water conductivity. During normal operation, the newly added DN20 first valve 9 maintains a certain opening, discharging water from the boiler body 2 into the low-pressure steam condensate flash tank 12. In the low-pressure steam condensate flash tank 12, a portion of the discharged wastewater flashes out as low-pressure steam, which is discharged to the external low-pressure steam network through the top discharge pipe 13. The remaining portion, as condensate, is discharged through the bottom discharge pipe 13 and sent to the power workshop as recycled water. After adding this process, the boiler water wastewater discharge is reduced by more than 40%, significantly saving boiler water consumption. Furthermore, it has low investment, is easy to operate and adjust, and is more practical.

[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An optimized operating system for improving boiler water quality in chemical production, comprising a gas cooler (1), characterized in that: The gas cooler (1) is equipped with multiple boiler bodies (2), two of which are fixed with a third connecting pipe (6) at their bottom ends. The gas cooler (1) is provided with a second connecting pipe (5) at its bottom. The bottom end of the third connecting pipe (6) is connected to the second connecting pipe (5). A fourth connecting pipe (7) is fixed on the outer wall of the second connecting pipe (5). A fifth connecting pipe (8) is installed at the end of the fourth connecting pipe (7) away from the second connecting pipe (5). A low-pressure steam condensate flash tank (12) is fixed at the end of the fifth connecting pipe (8) away from the fourth connecting pipe (7). A first valve (9) is installed on the outer wall of the fourth connecting pipe (7). Two first connecting pipes (3) are fixed at the top of each boiler body (2). A first flange (4) is fixed on the outer wall of the top of each first connecting pipe (3).

2. The optimized operating system for improving boiler water quality in chemical production according to claim 1, characterized in that: The low-pressure steam condensate flash tank (12) is fixed with discharge pipes (13) at both the upper and lower ends. The outer walls of the opposite ends of the two discharge pipes (13) are fixed with third flanges (14). The outer walls of the two discharge pipes (13) are equipped with third control valves (15).

3. The optimized operating system for improving boiler water quality in chemical production according to claim 1, characterized in that: One of the boiler bodies (2) has a liquid outlet pipe (20) fixed at the bottom end. A fifth flange (21) is fixed on the outer wall of the end of the liquid outlet pipe (20) away from the boiler body (2). A fourth control valve (22) is installed on the outer wall of the liquid outlet pipe (20).

4. The optimized operating system for improving boiler water quality in chemical production according to claim 1, characterized in that: The outer walls of the opposite ends of the fourth connecting pipe (7) and the fifth connecting pipe (8) are each fixed with a second flange (10), and the two second flanges (10) are fixed together by bolts (11).

5. The optimized operating system for improving boiler water quality in chemical production according to claim 1, characterized in that: Both ends of the gas cooler (1) are fixed with vent pipes (18), and the outer walls of the opposite ends of the two vent pipes (18) are fixed with fourth flanges (19).

6. The optimized operating system for improving boiler water quality in chemical production according to claim 1, characterized in that: The bottom of the low-pressure steam condensate flash tank (12) is fixed with four pillars (16), and the bottom of each of the four pillars (16) is fixed with a friction plate (17). The bottom of the gas cooler (1) is fixed with a bracket (23).

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