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High-temperature powdered coke dry quenching system and method

A technology for CDQ and powder coke, applied in the field of coal dry distillation, it can solve the problems of CDQ system being unable to handle powder, complicated system configuration, energy loss, etc. the effect of

Inactive Publication Date: 2016-10-26
CHINA NAT HEAVY MACHINERY RES INSTCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that the current dry coke quenching system cannot handle powder, a large amount of energy loss and complex system configuration.

Method used

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  • High-temperature powdered coke dry quenching system and method

Examples

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Effect test

Embodiment 1

[0029] This embodiment provides a high-temperature powder coke CDQ system, which includes a heat exchanger 1, a discharge machine 8 and a water supply system. The heat exchanger 1 is a vertical heat exchanger, and is sequentially arranged from top to bottom Secondary evaporating tube 2, primary evaporating tube 3, first mixing device 4, secondary preheating tube 5, second mixing device 6 and primary preheating tube 7, the top of the heat exchanger 1 is provided with an inlet The bottom is provided with a discharge port, and the discharge port is connected with the discharge machine 8. The upper port of the secondary evaporation tube 2 and the primary evaporation tube 3 is a steam outlet, and the lower port is a water inlet. The first-stage preheating pipe 5 and the first-stage preheating pipe 7 both have water outlet from the upper end and water inlet from the lower end;

[0030] The water supply system includes a cooling tower 9, a deaerator 13, and a steam drum 16. The water...

Embodiment 2

[0034] On the basis of Embodiment 1, this embodiment provides a high-temperature powder coke CDQ system. The water outlet of the first water pump 10 is divided into two paths, and one path is connected to the water inlet of the primary preheating pipe 7 through a pipeline. The other path returns to the water inlet of the first water pump 10 through the second valve 12 and the pipeline, and the second valve 12 is a proportional regulating valve. The flow rate of the cooling water is adjusted through the second valve 12, so as to meet the requirements of 80°C discharge and water temperature at the outlet of the primary preheating pipe 7 lower than 85°C.

[0035] The water outlet of the second water pump 14 is divided into two paths, one path communicates with the water inlet of the secondary preheating pipe 5 through a pipeline, and the other path communicates with the deaerator 13 through a third valve 15 and a pipeline, and the third valve 15 is Proportional regulating valve. ...

Embodiment 3

[0039] On the basis of Example 2, this example provides a high-temperature powder coke CDQ method. For high-temperature powder semi-coke with a diameter of less than 30 mm and a temperature of 550 ° C, water is used as the heat exchange medium, and a vertical heat exchanger is used to directly Conduction heat exchange, cooling step by step to below 80°C, realize CDQ, and produce saturated steam of 0.8~1.0MPa at the same time.

[0040]The high-temperature powder coke CDQ method comprises the following steps:

[0041] Step 1) Turn on the water supply system before starting to feed semi-coke, start the first water pump 10, part of the cooling water enters the deaerator 13, and the remaining part flows back to the cooling tower 9 for recycling;

[0042] Step 2) After low-temperature dry distillation of 550°C semi-coke feed, it passes through the secondary evaporator tube 2, the primary evaporator tube 3, the secondary preheating tube 5, and the primary preheating tube 7, and the h...

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Abstract

The invention provides a high-temperature powdered coke dry quenching system and method. The high-temperature powdered coke dry quenching system comprises a heat exchanger, a discharging machine and a water supply system, wherein the heat exchanger is a vertical heat exchanger and is sequentially provided with a second-stage evaporating pipe, a first-stage evaporating pipe, a first mixing device, a second-stage preheating pipe, a second mixing device and a first-stage preheating pipe from top to bottom, a feeding hole is formed in the top of the heat exchanger, and a discharging hole is formed in the bottom of the heat exchanger and is communicated with the discharging machine; upper ports of the second-stage preheating pipe and the first-stage evaporating pipe are steam outlets, and lower ports of the second-stage preheating pipe and the first-stage evaporating pipe are water inlets; water is supplied from the upper ends of the second-stage preheating pipe and the first-stage preheating pipe and is discharged from the lower ends of the second-stage preheating pipe and the first-stage preheating pipe. According to the high-temperature powdered coke dry quenching system, powdered coke is subjected to continuous quenching cooling for several times by virtue of counter-current operation, so that the heat transfer efficiency is improved, and the quenching time is shortened; the utilization rate of waste heat of the system is high; by virtue of a vertical square structure, the heat exchanger simple in structure, and the occupied area is small; by conveying semicoke by virtue of gravity, the energy consumption of equipment is low; and two groups of mixing devices are arranged in the heat exchanger, so that the loosing of materials can be prevented, and the heat transfer efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of coal dry distillation, and in particular relates to a high-temperature powder semi-coke CDQ system and method. Background technique [0002] Coal low-temperature dry distillation uses coal pyrolysis processing technology to heat coal to 550°C to 600°C in the absence of air to remove water, oxygen, and low-calorie volatile substances that affect the calorific value of coal, so that the exothermic components of coal Enriched to form solid semi-coke. [0003] The semi-coke produced by dry distillation technology mainly has block and powder forms according to different processes, and needs to be quenched and cooled after being produced by dry distillation furnace. Sensible heat of high-temperature semi-coke accounts for a relatively high proportion of energy consumption in the entire carbonization process. Therefore, recovering the sensible heat of semi-coke can effectively reduce the energy consumption of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B39/00
CPCC10B39/00Y02P20/129
Inventor 姜永涛徐鸿钧赵玉良李国莉葛延吕江
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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