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System and method for applying LNG cold energy to butyl rubber synthesis

A technology of butyl rubber and cold energy, applied in the method of container discharge, equipment discharged from pressure vessels, pressure vessels, etc., to achieve the effects of simplifying the refrigeration process, reducing production power consumption, and high-grade cold energy utilization

Active Publication Date: 2009-05-06
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of LNG cold energy in the synthesis of butyl rubber.

Method used

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  • System and method for applying LNG cold energy to butyl rubber synthesis
  • System and method for applying LNG cold energy to butyl rubber synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Basic LNG cold energy using ethane as refrigerant for butyl rubber synthesis refrigeration system and process

[0037] As shown in Figure 1 of the attached drawing of the specification, the system mainly includes:

[0038] LNG heat exchanger 1, gaseous refrigerant buffer tank 2, liquid refrigerant storage tank 3, flash tank A-4, flash tank B-5, catalyst heat exchanger 6, raw material heat exchanger 7, polymerization tank heat exchanger 8 , Air cooler 9, compressor 10.

[0039] Its workflow is:

[0040] The LNG and the gaseous ethane from the gaseous refrigerant buffer tank 2 exchange heat in the LNG heat exchanger 1 , the LNG is vaporized into NG and heated to normal temperature, and the gaseous ethane is directly condensed into a liquid state and then enters the liquid refrigerant storage tank 3 .

[0041] The liquid ethane in the liquid refrigerant storage tank 3 enters the flash tank A-4, the pressure is adjusted to -49KPa(G), and the temperature of the liquid ethane...

Embodiment 2

[0048] The basic LNG cold energy with ethylene as refrigerant is used in butyl rubber synthetic refrigeration system and process.

[0049] As Fig. 1, its system equipment is the same as embodiment 1.

[0050] Its workflow is:

[0051] LNG and gaseous ethylene from the gaseous refrigerant buffer tank 2 exchange heat in the LNG heat exchanger 1, the LNG is vaporized into NG and heated to normal temperature, and the gaseous ethylene is directly condensed into a liquid state and enters the liquid refrigerant storage tank 3.

[0052] The liquid ethylene in the liquid refrigerant storage tank 3 enters the flash tank A-4, the pressure is adjusted to 24KPa(G), and the temperature of the liquid ethylene in the flash tank A-4 is controlled to be about -100°C.

[0053] Part of the liquid ethylene at -100°C in the flash tank A-4 enters the catalyst heat exchanger 6 at a controlled flow rate to cool the catalyst solution and return to the flash tank A-4 after being vaporized. The catalys...

Embodiment 3

[0059] The improved and optimized LNG cold energy using ethylene as refrigerant is used in butyl rubber synthesis refrigeration system and process;

[0060] Refer to accompanying drawing 2 of the description, and Fig. 2 is a flow chart of improving and optimizing LNG cold energy for butyl rubber synthesis refrigeration on the basis of Example 2. The difference from Example 2 is that the sensible heat of low-temperature gaseous ethylene is fully utilized when cooling the catalyst solution and mixing raw materials.

[0061] In Figure 2, the gaseous ethylene at -100°C and part of the liquid ethylene at -100°C in the flash tank A-4 control the flow rate and enter the catalyst heat exchanger 6 to cool the catalyst solution and then vaporize and heat up to gaseous ethylene slightly lower than the initial temperature of the catalyst solution , the catalyst solution is cooled to the temperature required for the butyl rubber synthesis process;

[0062] Part of the liquid ethylene in t...

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Abstract

The invention relate to a system for synthesizing butyl rubber through LNG cold energy and a method thereof. The system is characterized in that the system comprises an LNG heat exchanger 1, a gaseous cold medium buffer tank 2, a liquid cold medium storage tank 3, a flash tank A-4, a flash tank B-5, a catalyst heat exchanger 6, a material heat exchanger 7, a polymerizer heat exchanger 8, an air temperature device 9 and a compressor 10; the method comprises the following steps: a cold medium such as ethane or ethene which meets the requirement of a butyl rubber synthesizing process and an LNG interface condition is selected; low-temperature cold energy contained in the LNG is permuted through the cold medium; and the low-temperature cold energy in the cold medium is used for cooling a catalyst solution and a mixed material and removing heat of polymerization reaction through corresponding heat exchange equipment so as to meet the requirements of the butyl rubber synthesizing process on temperature and cold quantity.

Description

technical field [0001] The invention belongs to the technical field of energy, and relates to a system and a method for synthesizing butyl rubber with LNG (liquefied natural gas) cold energy. This system and method replaces the high-grade cold energy released during the LNG vaporization process with a suitable refrigerant and uses it in the butyl rubber synthesis process, replacing the current large and complex propylene and ethylene cascade refrigeration system with high power consumption, and overcoming the current global The energy consumption (electric energy, circulating water) of the refrigeration system of the butyl rubber synthesis plant is too high. Background technique [0002] As a clean energy source, the global supply and demand of liquefied natural gas continues to grow rapidly. Since the natural gas resources in the world are concentrated in a few countries, it is necessary to purify the extracted natural gas in the natural gas producing area, and then liquef...

Claims

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Application Information

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IPC IPC(8): C08F210/12F17C7/04
Inventor 蒋凌云张磊王洁江克忠张健时洁
Owner CHINA NAT OFFSHORE OIL CORP
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