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Self-cleaning type fluidized bed heat exchanger

A fluidized bed heat exchanger, self-cleaning technology, applied in fluidized bed heat exchangers, heat exchanger types, indirect heat exchangers, etc., can solve the problem of decreased heat exchange effect and easy scaling of heat exchangers. question

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 the heat exchanger in the prior art is easy to foul, and the heat exchange effect is obviously reduced after long-term use. A self-cleaning fluidized bed heat exchanger is provided

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] use figure 1 The self-cleaning fluidized bed heat exchanger shown is applied to the quench cooler of an ethylene cracking unit. The self-cleaning fluidized bed heat exchanger is equipped with 442 heat exchanger tubes, each tube is 4800mm long and the diameter is It is Φ22×1.5mm, and the tubes 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 self-cleaning fluidized bed heat exchanger is 3%. The liquid phase is quench oil, and the flow velocity is 1.5m / s. The diameter of the casing along the lower edge is 12mm, and the arrangement is as follows: one in the middle, length 15mm, no groove, no opening; 183 casings in the middle 7 layers, length 20mm, groove 60 degrees, and a hole with a diameter of 6mm , a total of 258 on the outer 4 layers, the length is 30mm, the bevel is 45 degrees, and two holes are opened with a diameter of 7.5mm. ...

Embodiment 2

[0031]The same self-cleaning fluidized bed heat exchanger as in Example 1 is applied to the quench cooler of an ethylene cracking device. The solid particles are made of glass beads with an average particle size of 2 mm. The solid particles are placed in the self-cleaning fluidized bed heat exchanger. The average volume solid content within 8%. The liquid phase is quench oil, and the flow rate is 4m / s. The diameter of the casing along the lower edge is 7.5mm, and the arrangement is as follows: one in the middle, length 20mm, no groove, no opening; 183 casings in the middle 7 layers, length 30mm, groove 30 degrees, one hole, aperture 3mm, a total of 258 pieces in the outer 4 layers, the length is 50mm, the bevel is 15 degrees, and two holes are opened with a diameter of 2.5mm. The distribution plate is image 3 In the conical type shown, the diameter and height of the lower bottom are both 0.3 times the diameter of the heat exchanger cylinder, the opening rate is 70%, and the...

Embodiment 3

[0033] The same self-cleaning fluidized bed heat exchanger as in Example 1 is applied to the quench cooler of an ethylene cracking device. The solid particles are made of alumina beads with an average particle size of 5 mm. The solid particles are heat-exchanged in the self-cleaning fluidized bed. The average volume solid content in the container is 3%. The liquid phase is quench oil, and the flow velocity is 1.5m / s. The diameter of the casing along the lower edge is 12mm, and the arrangement is as follows: one in the middle, length 15mm, no groove, no opening; 183 casings in the middle 7 layers, length 20mm, groove 60 degrees, and a hole with a diameter of 6mm , a total of 258 pieces in the outer 4 layers, the length is 30mm, the bevel is 30 degrees, and a hole is opened with a diameter of 6mm. The distribution plate is image 3 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 0.0...

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Abstract

The invention relates to a self-cleaning type fluidized bed heat exchanger, and is mainly used for solving the technical problem that in the traditional technology, the quench cooler of the ethylene cracking device is prone to scale formation, and after long-period usage, the heat exchange effect is obviously reduced. The self-cleaning type fluidized bed heat exchanger comprises a lower tubular box 1, heat exchanger column tubes 2, an upper tubular box 3, a solid-liquid separator 4, a downcomer 5, a solid particle tank 6, a liquid storage tank 7, a liquid circulating pump 8, lower edge casing pipes 9, a distribution disc 10 and a distribution disc 11. The heat exchanger column tubes 2 are connected with the upper tubular box 3, the upper tubular box 3 is connected with the solid-liquid separator 4, solid particles enter the solid particle tank 6 through the downcomer 5, and then return to the lower tubular box 1, and liquid enters the liquid storage tank 7, and is sent to the lower tubular box 1 through the liquid circulating pump 8. By employing the above technical scheme, the above technical problem is well solved, and the operation period of the quench cooler of the ethylene cracking device can be prolonged.

Description

technical field [0001] The invention belongs to the field of chemical industry, specifically, belongs to the field of long-term operation of chemical heat exchange equipment, and relates to a self-cleaning fluidized bed heat exchanger, which is widely used to solve the problem of liquid phase leakage in the tube side and tubes that are prone to fouling and clogging. Long-term operation problems of shell heat exchangers. 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 self-cleaning fluidized bed heat exchanger to replace the traditional heat exchanger can improve the heat transfer effect of the heat exchanger and eff...

Claims

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Application Information

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IPC IPC(8): F28D13/00F28G1/12
Inventor 田立达顾军民张斌
Owner CHINA PETROLEUM & CHEM CORP