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Liquid-solid circulating fluidized bed heat exchanger

A circulating fluidized bed and heat exchanger technology, which is applied to the types of heat exchangers, indirect heat exchangers, clean heat transfer devices, etc., can solve the problems of reduced heat exchange effect and easy scaling of heat exchanger tubes.

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the prior art, the tube side of the heat exchanger is prone to fouling, and the heat exchange effect is obviously reduced after long-term use. It provides a liquid-solid circulating fluidized bed heat exchanger

Method used

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  • Liquid-solid circulating fluidized bed heat exchanger

Examples

Experimental program
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Effect test

Embodiment 1

[0030] use figure 1 The liquid-solid circulating fluidized bed heat exchanger shown is applied to the saponification waste liquid treatment unit of a propylene oxide plant. The liquid-solid circulating fluidized bed heat exchanger is equipped with 588 heat exchanger tubes, and each tube is 4500mm long. , the pipe diameter is Φ22×1.5mm, and the pipes are arranged in an equilateral triangle. The solid particles are glass beads with an average particle diameter of 5 mm, and the average volume solid content of the solid particles in the liquid-solid circulating fluidized bed heat exchanger is 3%. The liquid phase is water, and the flow velocity is 1.5m / s. The distribution bin is figure 2 Conical shape shown. The height of the distribution box is 450mm. The diameter of the narrow tube is 6mm, the length is 8mm, and there are 4 thin tubes arranged in each heat exchanger tube. The distribution plate is Figure 4 The cylindrical type shown has a diameter and height of 0.1 times...

Embodiment 2

[0032] The same liquid-solid circulating fluidized bed heat exchanger as in Example 1 is applied to a saponification waste liquid treatment unit of a propylene oxide plant, and the solid particles are made of glass beads with an average particle diameter of 2mm, and the solid particles are fluidized in the liquid-solid circulation The average volumetric solids content in the bed heat exchanger was 8%. The liquid phase is water, and the flow velocity is 4m / s. The distribution bin is figure 2 Trumpet shown. The distribution box height is 1350mm. The diameter of the thin tube is 6mm, the length is 15mm, and there are 4 thin tubes arranged in each heat exchanger tube. The distribution plate is Figure 4 Conical type shown, the diameter and height of the lower bottom are 0.3 times the diameter of the heat exchanger cylinder, the opening rate is 70%, and the hole diameter is 4mm. The distribution plate is Figure 5 The single-layer convex circular perforated plate shown has a...

Embodiment 3

[0034] The same liquid-solid circulating fluidized bed heat exchanger as in Example 1 is applied to a saponification waste liquid treatment unit of a propylene oxide plant, and the solid particles are alumina beads with an average particle diameter of 5mm. The average volume solid content in the fluidized bed heat exchanger is 3%. The liquid phase is water, and the flow velocity is 1.5m / s. The distribution bin is figure 2 Conical shape shown. The distribution box height is 450mm. The diameter of the narrow tube is 6mm, the length is 8mm, and there are 3 thin tubes arranged in each heat exchanger tube. The distribution plate is Figure 4 In the shown circular truncated shape, the diameter of the lower bottom is 0.1 times the diameter of the heat exchanger cylinder, the height is 0.08 times the diameter of the heat exchanger cylinder, the opening rate is 40%, and the aperture is 8mm. The distribution plate is Figure 5 The shown single-layer downward convex grid bar type ...

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Abstract

The invention relates to a liquid-solid circulating fluidized bed heat exchanger. According to the liquid-solid circulating fluidized bed heat exchanger, the technical problems that in the traditional technology, a propylene epoxide device saponification waste liquid heat exchanger tube side is prone to scaling and the heat exchanging effect is decreased obviously after a long period of using are solved. The liquid-solid circulating fluidized bed heat exchanger comprises a lower tube case 1, a heat exchanger tube nest 2, an upper tube case 3, a liquid-solid separator 4, a downcomer 5, a solid particle trough 6, a liquid storage trough 7, a liquid circulating pump 8, a distributing case 9, a distributing disk 10 and a distributing plate 11. The distributing case 9 is connected with the heat exchanger tube nest 2 through thin tubes 12. The heat exchanger tube nest 2 is connected with the upper tube case 3. The upper tube case 3 is connected with the liquid-solid separator 4. Solid particles enter the solid particle trough 6 through the downcomer 5 and then go back to the lower tube case 1. Liquid enters the liquid storage trough 7 and is delivered into the lower tube case 1 through the liquid circulating pump 8. According to the technical scheme of the liquid-solid circulating fluidized bed heat exchanger, the technical problems are well solved, and the liquid-solid circulating fluidized bed heat exchanger can be used for operation cycle prolonging of the propylene epoxide device saponification waste liquid heat exchanger.

Description

technical field [0001] The invention belongs to the field of chemical industry, specifically, belongs to the field of long-period operation of chemical heat exchange equipment, and relates to a liquid-solid circulating fluidized bed heat exchanger, which is widely used to solve the problem of liquid phase leakage in the tube side, and the tube side is prone to fouling and blockage The long-term operation of the shell and tube heat exchanger. Background technique [0002] Heat exchangers are widely used in petroleum, chemical, energy and other industries. However, as the use time increases, the heat exchanger will inevitably have dirt adhesion, which will lead to a decrease in the heat exchange efficiency of the heat exchanger and an increase in resistance, which will affect the normal operation of the heat exchanger. [0003] The development of a liquid-solid circulating fluidized bed heat exchanger to replace the traditional heat exchanger can improve the heat transfer eff...

Claims

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Application Information

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IPC IPC(8): F28D7/16F28G9/00
Inventor 田立达顾军民张斌
Owner CHINA PETROLEUM & CHEM CORP
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