Dispenser tank with circulating flow guide

Abstract

The utility model belongs to chemical industry storage tank technical field, concretely relates to dispersing agent storage tank with circulating flow guide device. Including tank body, the bottom of tank body lateral wall is equipped with opposite circulating outlet no. 1 and circulating outlet no. 2, and the outlet end of circulating outlet no. 1 and circulating outlet no. 2 is connected with the inlet of variable frequency circulating pump no. 1 and variable frequency circulating pump no. 2 through the outlet pipeline respectively, and the outlet end of variable frequency circulating pump no. 1 and variable frequency circulating pump no. 2 is connected to the circulating inlet no. 1 and circulating inlet no. 2 of tank body top lateral wall through the backflow pipeline respectively, and circulating inlet no. 1 and circulating inlet no. 2 are symmetrically arranged, and the connecting line of circulating inlet no. 1 and circulating inlet no. 2 is perpendicular to the connecting line of circulating outlet no. 1 and circulating outlet no. 2. This storage tank adopts the design of opposite type double pump double backflow, and combines with the vertical staggered layout of import and export pipeline, forms strong convection circulation, thereby ensures that the material in the tank can be highly and uniformly mixed, simultaneously, the storage tank is also matched with double cooling mechanism, significantly increases the heat exchange area and heat exchange efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of chemical storage tank technology, specifically relating to a dispersant storage tank with a circulation guiding device. Background Technology

[0002] In the production of polymer polyols (POPs), dispersants are key additives, but they present significant problems during production and storage: they are extremely sensitive to temperature. If the storage temperature is too high (above 30°C), they are prone to self-polymerization, forming solid particles. These particles easily clog conveying pipelines, heat exchange equipment, and subsequent process equipment, severely affecting continuous production and increasing maintenance costs. Furthermore, self-polymerization caused by temperature runaway or improper storage can also produce substandard dispersants. When used in POP synthesis, these dispersants can lead to increased filter residue and viscous substances in the POP product. POP containing such impurities will frequently clog the foaming nozzle in downstream sponge foaming applications, resulting in serious quality problems such as uneven foam cell structure and voids. In existing technologies, the circulation design of dispersant storage tanks has significant drawbacks: Firstly, the inlet and outlet pipelines of the circulation pump are usually too close together and poorly laid out, resulting in extremely uneven mixing of materials within the tank, the existence of flow dead zones, and the prolonged stagnation of materials further exacerbating the risk of self-agglomeration. Secondly, material conveying relies solely on ordinary single-layer pipelines, and the storage tank itself lacks efficient cooling methods, making it difficult to stably control the dispersant temperature below 30°C under current production conditions. Low heat exchange efficiency also exacerbates the blockage problem in pipelines and equipment. Therefore, there is an urgent need to develop a dispersant storage and circulation system that can effectively solve the problems of uniform material mixing, precise temperature control, and prevention of blockage. Utility Model Content

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a dispersant storage tank with a circulating flow guiding device. This tank employs a vertical dual-pump, dual-reflux design, combined with a vertically staggered layout of inlet and outlet pipelines, to create a powerful convection circulation. This ensures highly uniform mixing of the material within the tank, effectively preventing reactive polymerization. Simultaneously, the tank is equipped with a dual cooling mechanism, significantly increasing the heat exchange area and efficiency, and can stably maintain the dispersant temperature below 30°C, thereby inhibiting self-polymerization.

[0004] This utility model is achieved using the following technical solution:

[0005] The dispersant storage tank with a circulation guiding device includes a tank body. The bottom of the side wall of the tank body is provided with opposing circulation outlet one and circulation outlet two. The outlet ends of circulation outlet one and circulation outlet two are respectively connected to the inlets of variable frequency circulation pump one and variable frequency circulation pump two through discharge pipes. The outlet ends of variable frequency circulation pump one and variable frequency circulation pump two are respectively connected to circulation inlet one and circulation inlet two on the top side wall of the tank body through return pipes. Circulation inlet one and circulation inlet two are symmetrically arranged, and the line connecting circulation inlet one and circulation inlet two is perpendicular to the line connecting circulation outlet one and circulation outlet two.

[0006] The tank is equipped with a feed inlet at the top, which is connected to the dispersant production device via a pipeline. A flow regulating valve is installed at the feed inlet.

[0007] The reflux pipeline is connected to a discharge branch, and the outlet of the discharge branch is connected to the polymer polyol production unit.

[0008] The tank body has heat exchange coils wrapped around its side walls, and the heat exchange coils are connected to the cooling water circulation system.

[0009] The discharge pipe and return pipe are both double-layered pipes. The double-layered pipe includes an inner pipe and an outer pipe sleeved outside the inner pipe. A jacketed chamber is formed between the inner pipe and the outer pipe, and cooling water flows through the jacketed chamber.

[0010] The tank is equipped with a temperature sensor.

[0011] The discharge pipe is equipped with a filter, which is detachable.

[0012] The dispersant storage tank with the circulation guide device operates on the following principle:

[0013] The dispersant produced by the dispersant production unit enters the tank for storage through the top inlet. Variable frequency circulating pumps one and two are started, drawing material from the bottom of the tank through circulating outlets one and two, which are 180° opposite each other. After being pressurized by either pump, the material is sprayed into the tank through symmetrically distributed circulating inlets one and two at the top, forming a strong convective vortex. Cooling water flows through the heat exchange coils wrapped around the tank wall to cool the material inside; cooling water also flows through the jacketed chambers of the discharge and return pipelines, thus achieving continuous cooling of the material during transport. The material temperature is monitored in real time by a temperature sensor inside the tank to ensure it remains stable below 30°C. Before entering the circulating pump, the material passes through a removable filter on the discharge pipeline to intercept any formed trace solid particles, protecting the pump body and downstream pipelines. If the filter becomes clogged, it can be quickly disassembled and cleaned to avoid system downtime. When needed, the material is directly transported to the polymer polyol production unit through the discharge branch of the return pipeline, achieving a seamless connection between storage, transportation and production.

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

[0015] The dispersant storage tank with a circulating flow guiding device described in this utility model adopts a vertical dual-pump dual-return design. Combined with the vertically staggered layout of the inlet and outlet pipelines, a strong convection circulation is formed within the tank, greatly enhancing the fluidity of the material, forcibly eliminating dead zones, ensuring highly uniform mixing of the material within the tank, and effectively preventing reaction polymerization caused by prolonged local stagnation, thus ensuring the storage stability of the dispersant. Simultaneously, the dual cooling mechanism of the tank body and the discharge / return pipelines greatly increases the heat exchange area and efficiency, ensuring that the dispersant within the tank and during transportation is stably maintained below 30°C. This fundamentally inhibits self-polymerization reactions caused by overheating, effectively solving the serious blockage problem caused by the accumulation of solid particles in heat exchange equipment and pipelines, ensuring smooth continuous production, and preventing the production of substandard dispersant due to temperature runaway. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the dispersant storage tank with a circulation guiding device according to the present invention;

[0017] Figure 2 This is a top view of the dispersant storage tank with a circulation guide device according to the present invention;

[0018] In the diagram: 1. Tank; 2. Circulation Outlet 1; 3. Circulation Outlet 2; 4. Discharge Pipeline; 5. Variable Frequency Circulation Pump 1; 6. Variable Frequency Circulation Pump 2; 7. Return Pipeline; 8. Circulation Inlet 1; 9. Circulation Inlet 2; 10. Feed Inlet; 11. Dispersant Production Unit; 12. Flow Control Valve; 13. Discharge Branch; 14. Polymer Polyol Production Unit; 15. Heat Exchange Coil; 16. Temperature Sensor; 17. Filter. Detailed Implementation

[0019] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] Example 1

[0021] like Figure 1-2As shown, the dispersant storage tank with a circulation guide device includes a tank body 1. The bottom of the side wall of the tank body 1 is provided with opposite circulation outlet 2 and circulation outlet 3. The outlet ends of circulation outlet 2 and circulation outlet 3 are respectively connected to the inlets of variable frequency circulation pump 5 and variable frequency circulation pump 6 through discharge pipes 4. The outlet ends of variable frequency circulation pump 5 and variable frequency circulation pump 6 are respectively connected to circulation inlet 8 and circulation inlet 9 on the top side wall of the tank body 1 through return pipes 7. Circulation inlet 8 and circulation inlet 9 are symmetrically arranged, and the line connecting circulation inlet 8 and circulation inlet 9 is perpendicular to the line connecting circulation outlet 2 and circulation outlet 3.

[0022] The tank 1 is provided with a feed inlet 10 at the top. The feed inlet 10 is connected to the dispersant production device 11 through a pipeline. A flow regulating valve 12 is provided at the feed inlet 10.

[0023] The return pipeline 7 is connected to a discharge branch 13, and the outlet of the discharge branch 13 is connected to the polymer polyol production device 14.

[0024] The tank body 1 has a heat exchange coil 15 wrapped around its side wall, and the heat exchange coil 15 is connected to the cooling water circulation system.

[0025] The discharge pipe 4 and return pipe 7 are both double-layered pipes. The double-layered pipe includes an inner pipe and an outer pipe sleeved outside the inner pipe. A jacketed chamber is formed between the inner pipe and the outer pipe, and cooling water flows through the jacketed chamber.

[0026] The tank 1 is equipped with a temperature sensor 16.

[0027] The discharge pipe 4 is equipped with a filter 17, which is a detachable structure.

[0028] The specific steps for doing this are as follows:

[0029] The dispersant is injected into the tank 1 from the dispersant production device 11 through the top feed port 10, and the flow rate is regulated by the flow regulating valve 12.

[0030] Variable frequency circulating pump 5 and variable frequency circulating pump 6 are started. They draw material from the circulating outlets 2 and 3, which are distributed 180° opposite each other at the bottom of the tank, forming opposing suction. The material flows sequentially through the discharge pipe 4, variable frequency circulating pump 5 or variable frequency circulating pump 6, and return pipe 7, and is then injected at high speed into the tank 1 from the symmetrical circulating inlets 8 and 9 at the top of the tank 1, triggering a large-scale vortex mixing within the tank 1.

[0031] Cooling water is supplied to the heat exchange coil 15 outside the tank 1, as well as the jacketed chambers of the discharge pipe 4 and the return pipe 7, to achieve continuous cooling of the material. Before entering the variable frequency circulating pump 5 or the variable frequency circulating pump 6, the material flows through the filter 17 on the discharge pipe 4, where solid particles are trapped. When the pressure differential of the filter 17 increases, the filter element is disassembled and cleaned to ensure continuous operation of the system. The temperature of the material inside the tank is monitored in real time by the temperature sensor 16 inside the tank 1, and heat dissipation is enhanced by controlling the cooling water flow rate or pump speed to ensure that the temperature remains stable below 30°C.

[0032] When the downstream polymer polyol production unit 14 needs materials, the discharge branch 13 on the return pipeline 7 is opened, and the qualified dispersant that has been cooled, mixed and filtered is directly transported to the production section.

Claims

1. A dispersant storage tank with a circulating flow guiding device, characterized in that, The tank includes a tank body (1). The bottom of the side wall of the tank body (1) is provided with opposite circulation outlet 1 (2) and circulation outlet 2 (3). The outlet ends of circulation outlet 1 (2) and circulation outlet 2 (3) are respectively connected to the inlet of variable frequency circulation pump 1 (5) and variable frequency circulation pump 2 (6) through discharge pipe (4). The outlet ends of variable frequency circulation pump 1 (5) and variable frequency circulation pump 2 (6) are respectively connected to circulation inlet 1 (8) and circulation inlet 2 (9) on the top side wall of the tank body (1) through return pipe (7). Circulation inlet 1 (8) and circulation inlet 2 (9) are symmetrically arranged. The line connecting circulation inlet 1 (8) and circulation inlet 2 (9) is perpendicular to the line connecting circulation outlet 1 (2) and circulation outlet 2 (3).

2. The dispersant storage tank with a circulation guiding device according to claim 1, characterized in that, The tank (1) is provided with a feed inlet (10) at the top. The feed inlet (10) is connected to the dispersant production device (11) through a pipeline. A flow regulating valve (12) is provided at the feed inlet (10).

3. The dispersant storage tank with a circulation guiding device according to claim 1, characterized in that, The reflux pipeline (7) is connected to a discharge branch (13), and the outlet of the discharge branch (13) is connected to the polymer polyol production device (14).

4. The dispersant storage tank with a circulation guiding device according to claim 1, characterized in that, The tank body (1) has a heat exchange coil (15) wrapped around its side wall, and the heat exchange coil (15) is connected to the cooling water circulation system.

5. The dispersant storage tank with a circulation guiding device according to claim 1, characterized in that, The discharge pipe (4) and return pipe (7) are both double-layered pipes. The double-layered pipe includes an inner pipe and an outer pipe sleeved outside the inner pipe. A jacketed chamber is formed between the inner pipe and the outer pipe, and cooling water is circulated in the jacketed chamber.

6. The dispersant storage tank with a circulating flow guiding device according to claim 1, characterized in that, A temperature sensor (16) is installed inside the tank (1).

7. The dispersant storage tank with a circulation guiding device according to claim 1, characterized in that, The discharge pipe (4) is equipped with a filter (17), which is a detachable structure.

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