Gas-liquid separator for preventing foam blocking between ammonium phosphate heater pipelines

Abstract

The utility model discloses a vapor -liquid separator for preventing foam blockage between ammonium phosphate heater pipeline belongs to ammonium phosphate production equipment technical field, including separator casing, the separator casing top is provided with steam export, is provided with the liquid discharge port at the bottom, and the side bottom is provided with the steam import, be provided with the separation assembly in the separator casing, the separation assembly is located the top of separator casing inner chamber, the utility model discloses the separator casing that sets up between one effect to two effects, utilizes the upper baffle group and lower baffle group that separator casing interior distributes up and down, can effectively separate the steam and liquid foam from one effect into two effects, makes steam enter two effects, prevents foam blockage system, through the liquid discharge pipe and valve that sets up at the liquid discharge port, convenient control the discharge of foam liquid, stably transport to the boiler and carry out the reaction, reduce the loss, improve the resource utilization, reduce production cost, be favorable to improve the practicality of device.

Description

Technical Field

[0001] This utility model relates to the technical field of ammonium phosphate production equipment, and more specifically to a vapor-liquid separator for preventing foam blockage in the pipeline of ammonium phosphate heater. Background Technology

[0002] Fertilizer phosphate concentration is a crucial step in phosphate phosphate production. Its purpose is to remove moisture from the dilute phosphate slurry, increasing the slurry concentration from 30%-40% (at the neutralization stage outlet) to 70%-80% (to meet subsequent granulation requirements). The multi-effect flash evaporation concentration process using steam heating is currently the mainstream technology. Its core is to achieve energy savings through a combination of evaporation and flash evaporation, utilizing the cascaded utilization of steam's thermal energy. The connection between the first and second-effect flash evaporation chambers is a critical process in the entire system. Through this connection, the phosphate phosphate slurry achieves deep concentration with low energy consumption, providing a qualified concentrated slurry for subsequent granulation processes (such as spray granulation and drum granulation).

[0003] In the production process of ammonium phosphate, the proper utilization of steam is crucial for ensuring smooth production. Steam needs to be transported from the first-effect flash chamber to the second-effect flash chamber to achieve efficient energy transfer and reuse. However, in actual production, the steam flowing out of the first-effect flash chamber carries a large amount of ammonium phosphate droplets. These droplets, after entering the pipes connecting the first and second-effect flash chambers, easily accumulate and form scale inside the pipes, causing not only material loss but also pipe blockage.

[0004] However, pipe blockage not only affects the normal delivery of steam, leading to insufficient heat supply to the double-effect flash evaporator and impacting the production efficiency and product quality of ammonium phosphate, but may also cause safety hazards due to increased pressure in the pipes. Currently, the usual approach to this problem is to clean the pipes periodically, but this method requires interrupting production, increasing production costs and labor intensity, and the cleaning effect is limited, making it difficult to fundamentally solve the pipe blockage problem. Utility Model Content

[0005] The purpose of this invention is to solve the problem of steam carrying foam and clogging the pipes from the first-effect flash chamber to the second-effect flash chamber during the heating and concentration of ammonium phosphate, and to provide a vapor-liquid separator for preventing foam blockage between pipes of the ammonium phosphate heater.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A vapor-liquid separator for preventing clogging of pipes in an ammonium phosphate heater includes a separator housing, a steam outlet at the top of the separator housing, a liquid drain outlet at the bottom, and a steam inlet at the bottom side. A separation component is installed inside the separator housing, and the separation component is located at the top of the inner cavity of the separator housing.

[0008] As a further description of the above technical solution, the separation component includes an upper baffle plate group and a lower baffle plate group arranged vertically inside the separator housing, and the upper baffle plate group and the lower baffle plate group are staggered inside the separator housing. The upper baffle plate group and the lower baffle plate group are configured as a fan shape adapted to the inner wall of the separator housing.

[0009] As a further description of the above technical solution, both the upper baffle group and the lower baffle group consist of several parallel baffles, and the baffles make an angle of 30° with the horizontal direction, forming an S-shaped channel between adjacent baffles.

[0010] As a further description of the above technical solution, the steam inlet of the separator shell is fixedly connected to a steam inlet pipe, and the steam outlet of the separator shell is fixedly connected to a steam outlet pipe.

[0011] As a further description of the above technical solution, a drain pipe is fixedly connected to the drain port of the separator housing, and a valve is provided on the drain pipe.

[0012] As a further description of the above technical solution, the inner wall of the separator housing is provided with an anti-corrosion layer, which is made of polytetrafluoroethylene material.

[0013] As a further description of the above technical solution, the bottom of the separator housing has a conical structure, and the drain pipe is located at the lowest point of the conical structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention utilizes a separator shell positioned between the first and second effects. The upper and lower baffle assemblies distributed within the shell effectively separate steam and liquid foam entering the second effect from the first. This allows steam to enter the second effect without clogging the system. The staggered arrangement of the upper and lower baffle assemblies increases the flow path and contact time of steam and liquid foam within the separator shell, improving separation efficiency, ensuring smooth production, and increasing production efficiency. A drain pipe and valve at the drain outlet facilitate control of the foam liquid discharge, ensuring its stable delivery to the boiler for reaction, reducing losses, improving resource utilization, lowering production costs, and enhancing the practicality of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a vapor-liquid separator used to prevent clogging in the pipeline of an ammonium phosphate heater.

[0017] Figure 2 This is a schematic diagram of the internal structure of the separator shell of a vapor-liquid separator used to prevent clogging in the pipeline of an ammonium phosphate heater.

[0018] Figure 3 This is a schematic diagram of the separation component structure of a vapor-liquid separator used to prevent clogging in the pipeline of an ammonium phosphate heater.

[0019] Reference numerals in the attached drawings: 1. Separator shell; 2. Steam inlet pipe; 3. Steam outlet pipe; 4. Drain pipe; 5. Valve; 6. Upper baffle assembly; 7. Lower baffle assembly; 8. Anti-corrosion layer. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0021] This utility model provides a vapor-liquid separator for preventing foam blockage in the pipeline of an ammonium phosphate heater. Please refer to [reference needed]. Figures 1-3 As shown, it includes a separator housing 1, with a steam outlet at the top, a drain outlet at the bottom, and a steam inlet at the bottom side. A separation assembly is installed inside the separator housing 1, located at the top of the inner cavity of the separator housing 1. A steam inlet pipe 2 is fixedly connected to the steam inlet of the separator housing 1, and a steam outlet pipe 3 is fixedly connected to the steam outlet of the separator housing 1.

[0022] In this embodiment, when the ammonium phosphate heating steam enters the tank of the separator shell 1 from the first-effect pipe through the steam inlet pipe 2, the steam and the carried ammonium phosphate droplets move upward along the separator shell 1 and first come into contact with the lower baffle plate group 7. Due to the blocking effect of the lower baffle plate group 7, the flow direction of the steam and liquid foam changes. Under the action of gravity and the lower baffle plate group 7, the liquid foam separates from the steam. Some of the liquid foam will adhere to the lower baffle plate group 7 and gradually gather into droplets, which fall to the bottom of the separator shell 1. Subsequently, the steam continues to flow upward, and after being blocked and separated again by the upper baffle plate group 6, the residual liquid foam is further removed. Finally, the pure steam enters the second-effect heater from the steam outlet pipe 3 at the top of the separator shell 1. The separated liquid foam enters the drain pipe 4 through the drain port at the bottom of the tank under the control of the valve 5, and is transported to the boiler feed port through the drain pipe 4 to enter the boiler for reaction.

[0023] Furthermore, the separation assembly includes an upper baffle plate group 6 and a lower baffle plate group 7 arranged vertically inside the separator housing 1, and the upper baffle plate group 6 and the lower baffle plate group 7 are staggered inside the separator housing 1. The upper baffle plate group 6 and the lower baffle plate group 7 are configured as fan-shaped to fit the inner wall of the separator housing 1. Both the upper baffle plate group 6 and the lower baffle plate group 7 are composed of several mutually parallel baffle plates, and the angle between the baffle plates and the horizontal direction is 30°, forming an S-shaped channel between adjacent baffle plates.

[0024] In use, the lower baffle plate group 7 is set at the bottom of the upper baffle plate group 6. The outer wall of the arc-shaped end of the upper baffle plate group 6 is fixedly connected to the inner wall of the separator housing 1, and there is a gap between them. The outer wall of the arc-shaped end of the lower baffle plate group 7 is fixedly connected to the inner wall of the separator housing 1 on the side opposite to the upper baffle plate group 6, and there is a gap between them.

[0025] The upper baffle group 6 and the lower baffle group 7 are staggered to form a tortuous channel. When the ammonium phosphate heating steam carrying liquid foam enters the separator shell 1, it first comes into contact with the lower baffle group 7, forcing a change in flow direction. Then, when flowing upwards, it is blocked by the upper baffle group 6, changing direction again. This design of changing the flow path multiple times prolongs the residence time of the vapor and liquid inside the separator shell 1, providing sufficient conditions for the separation of steam and liquid foam. Liquid foam has greater mass and inertia than steam. When it encounters the upper baffle group 6 and the lower baffle group 7, it is difficult for it to quickly change its flow direction with the steam and will be intercepted by the upper baffle group 6 and the lower baffle group 7. This can initially intercept a large amount of liquid foam that initially enters the separator shell 1. The upper baffle group 6 can then handle the small amount of liquid foam remaining in the steam after the initial separation. The foam is intercepted again. Through the double interception effect, the amount of liquid foam entering the second effect is greatly reduced. The liquid foam intercepted by the upper baffle group 6 and the lower baffle group 7 will adhere to their surfaces. Due to the material properties and surface tension of the upper baffle group 6 and the lower baffle group 7, the foam will gradually break and converge into droplets. Under the action of gravity, the droplets will slide down or drip along the surfaces of the upper baffle group 6 and the lower baffle group 7 to the bottom of the separator shell 1, achieving complete separation from the steam and preventing foam from entering the second effect pipeline with the steam. The staggered distribution of the upper baffle group 6 and the lower baffle group 7 forms a multi-stage separation structure, so that the steam undergoes multiple separation processes during its ascent, gradually removing the liquid foam in it, significantly improving the efficiency and effect of steam-liquid separation, ensuring higher purity of the steam entering the second effect, and effectively preventing the problem of foam blockage between the tubes of the second effect heater.

[0026] Furthermore, a drain pipe 4 is fixedly connected to the drain port of the separator housing 1. A valve 5 is installed on the drain pipe 4. The other end of the drain pipe 4 is connected to the boiler. The time and flow rate of the drain can be controlled by the valve 5, which can be adjusted according to the actual production situation. It can also stably transport the liquid to the boiler for reaction, improve the utilization rate of resources, reduce production costs, and realize the reuse of waste.

[0027] Furthermore, the inner wall of the separator housing 1 is provided with an anti-corrosion layer 8, which is made of polytetrafluoroethylene. Since the steam in the production process of ammonium phosphate may carry corrosive substances, the anti-corrosion layer 8 can resist the corrosion of ammonium phosphate solution, which can extend the service life of the separator housing 1 and reduce equipment maintenance costs.

[0028] Furthermore, the bottom of the separator housing 1 has a conical structure, and the drain pipe 4 is located at the lowest point of the conical structure, which facilitates liquid collection and discharge and reduces residue in the tank.

[0029] The working principle of this utility model is as follows: When the ammonium phosphate heating steam enters the tank of the separator shell 1 from the first-effect pipe through the steam inlet pipe 2, the steam and the ammonium phosphate droplets it carries move upward along the separator shell 1 and first come into contact with the lower baffle plate group 7. Due to the blocking effect of the lower baffle plate group 7, the flow direction of the steam and liquid foam changes. Under the action of gravity and the lower baffle plate group 7, the liquid foam separates from the steam. Some of the liquid foam will adhere to the lower baffle plate group 7 and gradually gather into droplets, which drip to the bottom of the separator shell 1.

[0030] Subsequently, the steam continues to flow upward, and after being blocked and separated again by the upper baffle plate group 6, the residual liquid foam is further removed. Finally, the pure steam enters the double-effect heater from the steam outlet pipe 3 at the top of the separator shell 1.

[0031] The separated liquid foam enters the drain pipe 4 through the drain port at the bottom of the tank under the control of valve 5, and is then transported to the boiler feed port to enter the boiler for reaction.

[0032] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A vapor-liquid separator for preventing condensation and blockage in the pipeline of an ammonium phosphate heater, characterized in that: It includes a separator housing (1), which has a steam outlet at the top, a drain outlet at the bottom, and a steam inlet at the bottom side. A separation component is provided inside the separator housing (1), and the separation component is located at the top of the inner cavity of the separator housing (1).

2. The vapor-liquid separator for preventing clogging in the pipeline of an ammonium phosphate heater according to claim 1, characterized in that: The separation assembly includes an upper baffle plate group (6) and a lower baffle plate group (7) arranged vertically inside the separator housing (1), and the upper baffle plate group (6) and the lower baffle plate group (7) are staggered inside the separator housing (1). The upper baffle plate group (6) and the lower baffle plate group (7) are configured as a fan shape adapted to the inner wall of the separator housing (1).

3. The vapor-liquid separator for preventing clogging in the pipeline of an ammonium phosphate heater according to claim 2, characterized in that: The upper baffle group (6) and the lower baffle group (7) both consist of several parallel baffles, and the baffles are at an angle of 30° to the horizontal direction, forming an S-shaped channel between adjacent baffles.

4. The vapor-liquid separator for preventing clogging in the pipeline of an ammonium phosphate heater according to claim 1, characterized in that: The steam inlet of the separator housing (1) is fixedly connected to a steam inlet pipe (2), and the steam outlet of the separator housing (1) is fixedly connected to a steam outlet pipe (3).

5. The vapor-liquid separator for preventing clogging in the pipeline of an ammonium phosphate heater according to claim 1, characterized in that: The drain port of the separator housing (1) is fixedly connected to a drain pipe (4), and a valve (5) is provided on the drain pipe (4).

6. The vapor-liquid separator for preventing clogging in the pipeline of an ammonium phosphate heater according to claim 1, characterized in that: The separator housing (1) has an anti-corrosion layer (8) on its inner wall, which is made of polytetrafluoroethylene.

7. The vapor-liquid separator for preventing clogging in the pipeline of an ammonium phosphate heater according to claim 5, characterized in that: The bottom of the separator housing (1) is conical, and the drain pipe (4) is located at the lowest point of the conical structure.

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