Energy-saving phenol acetone device circulating cooling water system

Abstract

The utility model discloses a kind of energy-saving phenol acetone device's circulating cooling water systems, belong to circulating cooling water system technical field, comprising: circulating pump;Water inlet pipe, water inlet pipe is connected with the water inlet of circulating pump by flange;Water outlet pipe, water outlet pipe is connected with the water outlet of circulating pump by flange;Wherein, the inside installation of water inlet pipe has the guide portion that water flow follows circulating pump impeller rotation, water outlet pipe is equipped with check valve, the utility model can make water flow form the orderly pre-swirl that is matched with impeller rotation direction before entering circulating pump, and water flow flows along the valve core of streamline structure when discharging, smoothly passes through check valve, reduce local turbulent resistance, to can promote the energy-saving effect of system.

Description

Technical Field

[0001] This utility model relates to the technical field of circulating cooling water systems, specifically to a circulating cooling water system for an energy-saving phenol-acetone device. Background Technology

[0002] The circulating cooling water system of a phenol-acetone unit is a core auxiliary system ensuring the continuous and stable operation of the unit. Its core function is to drive cooling water through a circulating pump to form a closed loop between the inlet pipe, the heat exchange pipes of the process equipment, and the outlet pipe, thereby promptly removing the heat generated during the process and maintaining stable equipment operation. With the increasing demands for energy consumption control and operational efficiency in the chemical industry, reducing the resistance loss of the circulating pumps and pipes in the circulating cooling water system and reducing electrical energy consumption have become important optimization directions in the industry. However, most current circulating cooling water systems for phenol-acetone units have significant defects in the water flow guidance structure of the inlet pipe and the design of the check valve in the outlet pipe, making it difficult to meet the actual needs of high efficiency and energy saving. To solve the above problems, this utility model provides an energy-saving circulating cooling water system for a phenol-acetone unit. Utility Model Content

[0003] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide an energy-saving circulating cooling water system for a phenol-acetone device. This system enables the water flow to form an orderly pre-swirling flow that matches the impeller rotation direction before entering the circulating pump. Furthermore, the water flow is directed along the streamlined valve core during discharge, smoothly passing through the check valve and reducing local turbulent resistance, thereby improving the system's energy-saving effect.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a circulating cooling water system for an energy-saving phenol-acetone device, comprising: Circulating pump; The water inlet pipe is connected to the inlet of the circulating pump via a flange; The water outlet pipe is connected to the outlet of the circulating pump via a flange; The inlet pipe is equipped with a guide section that directs the water flow to follow the rotation of the circulating pump impeller, and the outlet pipe is equipped with a check valve.

[0005] Preferably, the guide portion includes: Multiple guide plates, which are spiral in shape, are fixedly installed on the inner wall of the water inlet pipe. The multiple guide plates are evenly distributed inside the water inlet pipe along its circumference.

[0006] Preferably, the end of the guide plate away from the inlet of the circulating pump is an arc surface.

[0007] Preferably, the end of the guide plate near the inlet of the circulating pump is flush with the end face of the inlet of the circulating pump.

[0008] Preferably, the check valve comprises: The valve body is arc-shaped and is fixedly installed on the inner wall of the outlet pipe; A valve core assembly, wherein the valve core assembly is located on the side of the valve body away from the outlet of the circulating pump; When the circulation pump is off, the valve core assembly and the valve body cooperate to prevent backflow of liquid inside the outlet pipe. When the circulation pump is started, the valve core assembly separates from the valve body.

[0009] Preferably, the valve core assembly includes: A retaining ring is located on the side of the valve body away from the outlet of the circulating pump; The valve core is slidably installed inside the outlet pipe, and multiple elastic units are connected between the valve core and the fixing ring, which has a clamping force to make the valve core press against the valve body.

[0010] Preferably, a plurality of limiting rods are fixedly installed at one end of the outlet of the valve core circulation pump. The ends of the multiple limiting rods away from the valve core are slidably connected to the inner wall of the outlet pipe, and one end of the elastic unit is fixedly connected to the limiting rods, while the other end is fixedly connected to the fixing ring.

[0011] Preferably, the valve core is teardrop-shaped, with its blunt end facing the direction of water flow, and the diameter of the blunt end is larger than the inner diameter of the valve body.

[0012] Preferably, the inner ring surface of the valve body and the fixing ring facing the outlet of the circulating pump is an outwardly flared open shape.

[0013] The beneficial effects of this utility model are as follows: This invention, through the installation of a spiral guide plate inside the inlet pipe, the arc-shaped inlet end of the guide plate, and the outlet end flush with the inlet of the circulating pump, enables the water flow to form an orderly pre-swirling flow that matches the rotation direction of the impeller before entering the circulating pump. This reduces eddy current losses and frictional resistance caused by disordered impact of the water flow on the impeller, thereby reducing the operating energy consumption of the circulating pump and improving the energy-saving effect of the system.

[0014] This invention, through the arrangement of an arc-shaped valve body, an outwardly flared inner ring valve body and a fixing ring, a teardrop-shaped valve core, an elastic unit, and a limiting rod, allows water to flow smoothly through the check valve along the streamlined structure, reducing local turbulence resistance. On the other hand, the low-elasticity elastic unit ensures effective sealing when closed to prevent backflow, thereby reducing the overall operating resistance of the outlet pipeline and further achieving system energy saving. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the circulating cooling water system of an energy-saving phenol-acetone device provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the guide plate of this utility model away from the inlet of the circulating pump.

[0018] Figure 3 This is a schematic diagram of the structure of the guide plate of this utility model near the inlet of the circulating pump.

[0019] Figure 4 This is a schematic diagram of the overall structure of the guide plate of this utility model.

[0020] Figure 5 This is a cross-sectional view (first perspective) of the water outlet pipe of this utility model.

[0021] Figure 6 This is a cross-sectional view (second perspective) of the water outlet pipe of this utility model.

[0022] Explanation of reference numerals in the attached figures: 1. Circulating pump, 2. Inlet pipe, 3. Outlet pipe, 4. Guide plate, 5. Valve body, 6. Fixing ring, 7. Valve core, 8. Limiting rod, 9. Elastic unit. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This invention provides an energy-saving circulating cooling water system for a phenol-acetone device, such as... Figures 1 to 6 As shown.

[0025] Example 1: A circulating cooling water system for an energy-saving phenol-acetone unit includes a circulating pump 1, an inlet pipe 2 connected to the inlet of the circulating pump 1 via a flange, an outlet pipe 3 connected to the outlet of the circulating pump 1 via a flange, a guide part installed inside the inlet pipe 2 to guide the water flow to follow the rotation of the impeller of the circulating pump 1, and a check valve installed on the outlet pipe 3 to prevent the liquid from flowing backward.

[0026] The guide section includes multiple guide plates 4; the guide plates 4 are spiral in shape and are fixedly installed on the inner wall of the water inlet pipe 2, and the multiple guide plates 4 are evenly distributed in the interior of the water inlet pipe 2 along the circumference of the water inlet pipe 2, and the included angle between two adjacent guide plates 4 is equal to ensure that the water flow can be guided evenly; at the same time, the end of the guide plate 4 away from the water inlet of the circulation pump 1 is an arc surface, and the arc surface can avoid the generation of local turbulence when the water flows in, and the end of the guide plate 4 near the water inlet of the circulation pump 1 is flush with the end face of the water inlet of the circulation pump 1.

[0027] When the circulating cooling water system is started, cooling water flows from the suction pool into the inlet pipe 2. At this time, the spiral guide plate 4 on the inner wall of the inlet pipe 2 will generate a circumferential guiding force on the water flow. Since the spiral direction of the guide plate 4 is consistent with the rotation direction of the impeller of the circulating pump 1, the disordered cooling water will gradually form an ordered pre-swirling flow that advances axially along the inlet pipe 2 and rotates synchronously under the action of the guide plate 4. The arc surface design of the guide plate 4 away from the circulating pump 1 can avoid local turbulence caused by sharp edges when the water flows into the guiding area, and reduce the friction loss of the water flow in the inlet pipe 2. The design of the guide plate 4 being flush with the inlet end face of the circulating pump 1 allows the pre-swirling flow formed by the guide to directly and seamlessly enter the impeller area of ​​the circulating pump 1, matching the direction of motion with the high-speed rotating impeller. At this time, the pre-swirling speed of the water flow and the rotation speed of the impeller work together, avoiding the disordered impact between the water flow and the impeller blades in the traditional non-guided structure, reducing the eddy current loss in the impeller area, thereby reducing the power consumption required for the circulating pump 1 to drive the water flow, realizing the "resistance-free connection" of the water flow between the inlet pipe 2 and the circulating pump 1, and improving the energy-saving effect of the system's inlet end.

[0028] Example 2: This embodiment mainly introduces the specific structure of the check valve. The check valve includes a valve body 5 and a valve core assembly. The valve body 5 is arc-shaped and is fixedly installed on the inner wall of the outlet pipe 3. The valve core assembly is located on the side of the valve body 5 away from the outlet of the circulating pump 1. The valve core assembly includes a fixing ring 6 and a valve core 7. The fixing ring 6 is fixed on the inner wall of the outlet pipe 3 and is located on the side of the valve body 5 away from the outlet of the circulating pump 1. The valve core 7 is installed inside the outlet pipe 3 by sliding fit. The valve core 7 is teardrop-shaped, with its blunt end facing the direction of water flow, and the diameter of the blunt end of the valve core 7 is larger than the inner diameter of the valve body 5. At the same time, the inner ring surface of the valve body 5 and the fixing ring 6 facing the outlet of the circulating pump 1 is an outwardly flared open shape.

[0029] When the circulating pump 1 starts, cooling water flows from the outlet of the circulating pump 1 into the outlet pipe 3, first contacting the outwardly flared inner annular surface of the valve body 5. The outwardly flared inner annular surface guides the water flow towards the central area of ​​the outlet pipe 3, preventing the water flow from forming stagnation or eddies on the inner wall of the valve body 5. Subsequently, the water flow acts on the blunt end of the valve core 7. The teardrop-shaped valve core 7 can evenly disperse the impact force of the water flow, reducing the generation of turbulence on the surface of the valve core 7. At the same time, the thrust of the water flow pushes the valve core 7 to slide away from the valve body 5 along the axis of the outlet pipe 3, causing the valve core 7 to separate from the valve body 5. At this time, the outwardly flared inner annular surface of the fixing ring 6 continues to guide the water flow smoothly through the valve core assembly. In the valve body 5, the valve core 7 and the inner wall of the outlet pipe 3 are designed to prevent local resistance in the water flow. When the circulation pump 1 is turned off, the water flow in the outlet pipe 3 tends to flow back due to inertia. The backflow acts on the tail of the valve core 7, pushing the valve core 7 to slide towards the valve body 5. Since the diameter of the blunt end of the valve core 7 is larger than the inner diameter of the valve body 5, the valve core 7 can fit tightly against the inner wall of the valve body 5 to achieve a check valve seal. Throughout the process, the arc-shaped structure of the valve body 5, the outwardly flared inner ring surface, and the teardrop-shaped valve core 7 work together to ensure the check valve function and significantly reduce the local turbulent resistance of the water flow through the check valve, thereby reducing the operating energy consumption of the outlet pipe 3.

[0030] Example 3: To ensure that the valve core 7 slides stably along the axis of the outlet pipe 3, the valve core assembly also includes multiple limiting rods 8 and multiple elastic units 9. The limiting rods 8 are fixedly installed on the upper end of the valve core 7, and the multiple limiting rods 8 are evenly distributed around the circumference of the valve core 7. The end of the limiting rod 8 away from the valve core 7 slides against the inner wall of the outlet pipe 3 to ensure that the limiting rod 8 can move smoothly along the axis of the outlet pipe 3. One end of the elastic unit 9 is fixedly connected to the end of the limiting rod 8 away from the valve core 7 through a hook, and the other end is fixedly connected to the side of the fixing ring 6 facing the valve core 7 through a hook. When the elastic unit 9 is in its natural state, it can provide a clamping force to make the valve core 7 press against the valve body 5.

[0031] When the circulation pump 1 starts, the water flow pushes the valve core 7 to slide away from the valve body 5. The valve core 7 drives the limit rod 8 to move synchronously along the sliding groove on the inner wall of the outlet pipe 3. The sliding connection structure of the limit rod 8 can accurately guide the movement direction of the valve core 7, preventing the valve core 7 from shifting or tilting under the impact of the water flow. This ensures that the valve core 7 always moves along the axis of the outlet pipe 3, making the gap between the valve core 7 and the valve body 5 uniform, and allowing the water flow to pass smoothly through the check valve. When the circulation pump 1 is turned off, the water flow back pushes the valve core 7 to move towards the valve body 5. The elastic rope will generate an auxiliary pulling force to accelerate the reset of the valve core 7, ensuring that the valve core 7 quickly fits with the valve body 5 to achieve a seal and prevent leakage of backflow water. The guiding effect of the limit rod 8 and the elasticity of the elastic unit 9 work together to ensure the stability of the valve core assembly movement and further reduce the operating resistance of the outlet pipe 3. Together with the valve body 5 and the valve core 7, they achieve efficient and energy-saving operation of the check valve.

[0032] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A circulating cooling water system for an energy-saving phenol-acetone plant, characterized in that, include: Circulating pump (1); Water inlet pipe (2), which is connected to the inlet of the circulating pump (1) via a flange; Water outlet pipe (3), which is connected to the outlet of the circulating pump (1) via a flange; The inlet pipe (2) is equipped with a guide part to guide the water flow to follow the rotation of the impeller of the circulating pump (1), and the outlet pipe (3) is equipped with a check valve.

2. The circulating cooling water system of the energy-saving phenol-acetone unit as described in claim 1, characterized in that, The guide section includes: Multiple guide plates (4) are spiral in shape and are fixedly installed on the inner wall of the water inlet pipe (2). The multiple guide plates (4) are evenly distributed in the interior of the water inlet pipe (2) along the circumference of the water inlet pipe (2).

3. The circulating cooling water system of the energy-saving phenol-acetone unit as described in claim 2, characterized in that, The end of the guide plate (4) away from the inlet of the circulating pump (1) is an arc surface.

4. The circulating cooling water system of the energy-saving phenol-acetone unit as described in claim 2, characterized in that, The end of the guide plate (4) near the inlet of the circulating pump (1) is flush with the end face of the inlet of the circulating pump (1).

5. The circulating cooling water system of the energy-saving phenol-acetone unit as described in claim 1, characterized in that, The check valve includes: Valve body (5), the valve body (5) is arc-shaped and is fixedly installed on the inner wall of the water outlet pipe (3); Valve core assembly, the valve core assembly being located on the side of the valve body (5) away from the outlet of the circulating pump (1); When the circulating pump (1) is closed, the valve core assembly and the valve body (5) cooperate to prevent the liquid inside the outlet pipe (3) from flowing back. When the circulating pump (1) is started, the valve core assembly and the valve body (5) separate.

6. The circulating cooling water system of the energy-saving phenol-acetone unit as described in claim 5, characterized in that, The valve core assembly includes: A fixing ring (6) is located on the side of the valve body (5) away from the outlet of the circulating pump (1); The valve core (7) is slidably installed inside the water outlet pipe (3), and multiple elastic units (9) are connected between the valve core (7) and the fixing ring (6), which have a clamping force to make the valve core (7) press against the valve body (5).

7. The circulating cooling water system of the energy-saving phenol-acetone plant as described in claim 6, characterized in that, Multiple limiting rods (8) are fixedly installed at one end of the valve core (7) away from the outlet of the circulating pump (1). The ends of the multiple limiting rods (8) away from the valve core (7) are slidably connected to the inner wall of the outlet pipe (3). One end of the elastic unit (9) is fixedly connected to the limiting rod (8), and the other end is fixedly connected to the fixing ring (6).

8. The circulating cooling water system of the energy-saving phenol-acetone unit as described in claim 6, characterized in that, The valve core (7) is teardrop-shaped, with its blunt end facing the direction of water flow, and the diameter of the blunt end is greater than the inner diameter of the valve body (5).

9. The circulating cooling water system of an energy-saving phenol-acetone plant as described in claim 6, characterized in that, The inner ring of the valve body (5) and the fixing ring (6) facing the outlet of the circulating pump (1) is an open shape with outward expansion.

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