Feeding device for preventing phenol from crystallizing in pump
By combining the use of demineralized water flushing equipment and low-pressure steam temperature control, the problem of phenol crystallization inside the pump was solved, achieving a safe and time-saving pump cleaning effect and preventing pump blockage.
Patent Information
- Application Number
- CN202520581043.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-31
AI Technical Summary
In existing technologies, phenol crystallization inside the pump causes pump blockage, affecting normal operation. Furthermore, existing treatment methods are time-consuming, energy-intensive, and dangerous, especially in low-temperature environments.
A demineralized water flushing device is used to prevent phenol crystallization by preheating and cleaning the phenol delivery pump. The device includes a combination of a phenol storage tank, a phenol discharge pump, a demineralized water storage tank, a demineralized water heat exchanger, a phenol intermediate tank, and a phenol intermediate tank discharge pump. Low-pressure steam is used to control the temperature to achieve preheating and cleaning.
It achieves effective preheating and cleaning before and after phenol delivery, preventing crystallization inside the pump. It is safe, time-saving, simple in structure, and highly practical.
Smart Images
Figure CN223781643U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a feeding device, more specifically, relates to a feeding device for preventing phenol from crystallizing in a pump, and belongs to the field of petroleum chemical industry. BACKGROUND
[0002] Phenol is a raw material widely used in chemical production, and its melting point is 43 DEG C. It can quickly crystallize into solid state at room temperature. At present, the phenol conveying device is composed of a phenol storage tank, a phenol conveying pump and a phenol conveying pipeline, and all of them have electric heat tracing to keep the phenol at 70-85 DEG C. Higher temperature can make the phenol color yellow and affect its quality, but this temperature cannot make the pump reach above 43 DEG C. This leads to the crystallization of phenol in the pump during conveying, which causes the pump to be blocked and unable to operate normally. On the one hand, when starting the pump, a certain amount of phenol is not enough to preheat the phenol conveying pump to above the melting point of phenol, which causes the phenol flowing through the pump body to crystallize quickly and makes the pump unable to operate normally. On the other hand, after stopping the pump, the residual phenol in the phenol conveying pump cools and crystallizes, which makes it difficult to start the pump and affects the next use. The current treatment method is to use an external temporary steam pipeline to heat and melt the pump body before starting. This operation is time-consuming, energy-consuming and dangerous. Especially in winter, the required melting time is longer. Therefore, a safe and time-saving method is needed. SUMMARY
[0003] In order to solve the above technical problems, the utility model provides a feeding device for preventing phenol from crystallizing in a pump, which has the technical characteristics of simple structure, high practicability, providing a desalted water flushing device, cleaning the phenol in the phenol conveying pump, and preventing phenol from crystallizing in the pump.
[0004] In order to achieve the above purpose, the utility model is realized by the following technical scheme:
[0005] The utility model relates to a feeding device for preventing phenol from crystallizing in a pump, which comprises a phenol storage tank, a phenol discharge pump, a desalted water storage tank, a desalted water heat exchanger, a phenol intermediate tank and a phenol intermediate tank discharge pump. The phenol storage tank 1 is connected to the phenol discharge pump through a No. 1 pipeline, and the phenol discharge pump is sent to the phenol user through an outlet pipeline. A No. 2 pipeline is connected to the outlet pipeline, and the No. 2 pipeline is divided into a No. 4 pipeline and a No. 5 pipeline. The No. 4 pipeline is sequentially connected to the desalted water storage tank and the desalted water heat exchanger, and the desalted water heat exchanger is connected to the phenol discharge pump through a No. 6 pipeline. The No. 5 pipeline is sequentially connected to the phenol intermediate tank and the phenol intermediate tank discharge pump, and the phenol intermediate tank discharge pump is connected to the phenol recovery system.
[0006] Preferably, the phenol storage tank, the No. 1 pipeline, the outlet pipeline, the No. 6 pipeline and the desalted water storage tank are all provided with a heating layer to prevent the residual phenol from crystallizing in the phenol discharge pump and affecting the operation.
[0007] Preferably, the desalted water heat exchanger is connected with a low pressure steam pipeline to provide a heat exchange source, and the low pressure steam pipeline is connected with a No. 7 pipeline, which is connected at the outlet end of the phenol discharge pump through a flow controller to realize the control of the phenol discharge pump outlet temperature through the low pressure steam flow.
[0008] Preferably, a stop valve is connected on the No. 1 pipeline, the outlet pipeline, the No. 2 pipeline, the No. 4 pipeline, the No. 5 pipeline and the low pressure steam pipeline.
[0009] Beneficial effects: simple structure, strong practicability, providing a desalted water flushing device, cleaning the phenol in the phenol conveying pump, preventing the crystallization of phenol in the pump, safe and time-saving. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 is a schematic diagram of the whole structure of the utility model. DETAILED DESCRIPTION
[0011] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0012] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0013] In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, or indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0014] As Figure 1The illustration shows a specific embodiment of a feeding device for preventing phenol crystallization within a pump. This feeding device includes a phenol storage tank 1, a phenol discharge pump 6, a demineralized water storage tank 2, a demineralized water heat exchanger 5, a phenol intermediate tank 4, and a phenol intermediate tank discharge pump 3. The phenol storage tank 1 is connected to the phenol discharge pump 6 via a first pipeline, and the phenol discharge pump 6 delivers phenol to a user via an outlet pipeline. A second pipeline is connected to the outlet pipeline, which is further divided into a fourth pipeline and a fifth pipeline. The fourth pipeline is sequentially connected to the demineralized water storage tank 2 and the demineralized water heat exchanger 5, and the demineralized water heat exchanger 5 is connected to the phenol discharge pump 6 via a sixth pipeline. The fifth pipeline is sequentially connected to the phenol intermediate tank 4 and the phenol intermediate tank discharge pump 3, and the phenol is transported to a phenol recovery system via the phenol intermediate tank discharge pump 3. The phenol storage tank 1, pipeline No. 1, outlet pipeline, pipeline No. 6, and demineralized water storage tank 2 are all equipped with heating layers to prevent residual phenol from crystallizing in the phenol discharge pump 6 and affecting operation. Phenol is delivered from phenol storage tank 1 to the phenol user via the electrically heated and insulated pipeline No. 1, the phenol discharge pump 6, and its outlet pipeline. Demineralized water is heated by the demineralized water heat exchanger 5 in demineralized water storage tank 2, enters the phenol discharge pump 6, and returns to demineralized water storage tank 2 or phenol intermediate tank 4. In the phenol intermediate tank 4, the phenol is transported to the phenol recovery system by the phenol intermediate tank discharge pump 3. The demineralized water heat exchanger 5 is heated by low-pressure steam, and the outlet temperature of the phenol discharge pump is controlled by the low-pressure steam flow rate.
[0015] The working principle of this utility model is as follows: The technical solution of this application realizes that the phenol delivery pump is preheated before phenol is introduced and can be cleaned after discharge to prevent phenol from crystallizing in the pump.
[0016] Based on the principle that phenol and water are miscible in any proportion above 65℃, the phenol discharge pump 6 is processed as follows: ① Before phenol enters the phenol discharge pump 6, the pump body is preheated: the demineralized water from the demineralized water storage tank 2 is heated in the demineralized water heat exchanger 5, and then the heated demineralized water enters the phenol discharge pump 6 to preheat the pump body to 65-85℃ before returning to the demineralized water storage tank 2. ② Phenol is introduced to clean the demineralized water inside the phenol pump: after entering the phenol discharge pump 6, the phenol is transported to the phenol intermediate tank 4 through pipeline No. 5. ③ After the phenol discharge pump 6 passes the cleaning test, it is switched to the phenol conveying line, i.e., the outlet pipeline, for normal discharge. ④ Stop phenol delivery and clean the phenol in phenol discharge pump 6: Switch the phenol feed to demineralized water feed, i.e., pipeline No. 4. After the demineralized water is heated to 65-85°C by demineralized water heat exchanger 5, flush the phenol in phenol discharge pump 6 and return it to phenol intermediate tank 4. Then, it is transported to the phenol recovery system through phenol intermediate tank discharge pump 3 to prevent residual phenol crystals from affecting the operation of the pump.
[0017] In a preferred embodiment, the desalted water heat exchanger 5 is connected with a low-pressure steam pipeline to provide a heat exchange source, and the low-pressure steam pipeline is connected with a No. 7 pipeline which is connected with the outlet end of the phenol discharge pump 6 through a flow controller to control the outlet temperature of the phenol discharge pump 6 through the low-pressure steam flow, which is simple in structure and high in practicability.
[0018] In a preferred embodiment, a stop valve is connected on the No. 1 pipeline, the outlet pipeline, the No. 2 pipeline, the No. 4 pipeline, the No. 5 pipeline and the low-pressure steam pipeline, so that the functions of cutting the phenol feed to the desalted water feed, cutting the phenol feed to the phenol conveying line after the phenol discharge pump 6 is cleaned and qualified, and the like can be realized.
[0019] Finally, it should be noted that the utility model is not limited to the above embodiments, and there can be many variations. All variations which can be directly derived or thought of by those skilled in the art from the disclosed content of the utility model should be considered as falling within the protection scope of the utility model.
Claims
1. A feed device for preventing crystallization of phenol in a pump, characterized by: The application relates to a phenol storage tank (1), a phenol discharge pump (6), a desalted water storage tank (2), a desalted water heat exchanger (5), a phenol intermediate tank (4) and a phenol intermediate tank discharge pump (3); the phenol storage tank (1) is connected with the phenol discharge pump (6) through a first pipeline, the phenol discharge pump (6) is externally sent to a phenol user through an outlet pipeline, a second pipeline is connected with the outlet pipeline, the second pipeline is provided with a fourth pipeline and a fifth pipeline, the desalted water storage tank (2) and the desalted water heat exchanger (5) are sequentially connected with the fourth pipeline, the desalted water heat exchanger (5) is connected with the phenol discharge pump (6) through a sixth pipeline, the phenol intermediate tank (4) and the phenol intermediate tank discharge pump (3) are sequentially connected with the fifth pipeline and are sent to a phenol recovery system through the phenol intermediate tank discharge pump (3).
2. A feed device to prevent crystallization of phenol in a pump according to claim 1, characterized in that: The phenol storage tank (1), the first pipeline, the outlet pipeline, the sixth pipeline and the desalted water storage tank (2) are all provided with heating layers to prevent residual phenol from crystallizing in the phenol discharge pump (6) and affecting operation.
3. A feed device for preventing crystallization of phenol in a pump according to claim 1 or 2, characterized in that: The desalted water heat exchanger (5) is connected with a low-pressure steam pipeline to provide a heat exchange source, the low-pressure steam pipeline is connected with a seventh pipeline, the seventh pipeline is connected with the outlet end of the phenol discharge pump (6) through a flow controller to realize control of the outlet temperature of the phenol discharge pump (6) through low-pressure steam flow.
4. A feed device to prevent crystallization of phenol in a pump according to claim 3, characterized in that: The first pipeline, the outlet pipeline, the second pipeline, the fourth pipeline, the fifth pipeline and the low-pressure steam pipeline are all connected with stop valves.