The method of transportation of gas

 

(57) Abstract:

The invention relates to the gas industry, in particular to a method for transporting gaseous products long distances from source to consumer. The technical result of the invention is to improve the performance of pipeline for gas transportation through the long dewy pipeline and reduce the cost of pipeline isolation. Store liquefied natural gas (nitrogen) is directed to the block filter-dryers, which produces a lowering of the dew point temperature of the gas, and then pumping evaporation plant, which produces the gasification of the liquefied gas and this set increased values of input parameters gas flow, pressure and temperature of the dew point, measure the parameters of the gas at the inlet and outlet of the pipeline and by the value of the dew point temperature of the gas at the outlet adjusting the amount of drying to the desired value by decreasing flow and gas temperature at the outlet and lowering the dew point temperature of gas at inlet, moreover, the process of transporting gas produced in the lower temperature environment. 1 Il.

The invention relates to the gas industry, in particular to method t the walls of the method of transportation of gas, consisting in laying under the main gas pipelines-satellites, which convey the refrigerant (U.S. patent N 2942896, CL 285-228, 1970).

The implementation of this method requires a large capital expenditure, and the method has insufficient efficiency of transportation.

There is a method of transporting gas, which consists in applying technical gas through the inner tube of the coaxial pipe, and cooling protective among - counterflow through the annular space with a speed equal to or greater than the speed of technical gas and.with. The USSR and 918652, CL F 17 D 1/02, 1982).

This method has the following disadvantages.

The practice of exploitation of implementing its pipelines shows that it leads to high costs for the provision of insulation of the pipeline from the soil by feeding annulus protective environment or refrigerant. The feed rate of the refrigerant limits the capacity of the inner pipeline.

The known method of gas transportation, including transport of the gas through the inner tube of the coaxial pipe, the annular space is filled with gas, and the annulus using DL is arousih valves with obtaining a throttling effect, and to increase the refrigeration effect and improving insulation transportation is carried out using at least two annular spaces.with. USSR N 1707425, CL F 17 D 1/02, 1992).

The disadvantage of this method is the extra cost of providing thermal insulation of the pipeline.

The known method of gas transportation through the pipeline, including the preparation of gas cooling in the initial part of the pipeline to the condensation and cooling of the gas produced by the ejection of condensate on Suzanna pipe section when the pressure on the ejector 0.05-0.1 MPa.with. USSR N 1800214, CL F 17 D 1/02, 1993).

The disadvantage of this method is that the dehydration of natural gas actually produced only at the initial section of the pipe and upon further movement of gas through the long dewy pipeline natural gas can be wetted to invalid values, which will lead to additional financial costs for the dehydration of natural gas at the exit of the pipe. The closest technical solution to the claimed is the method of transport of gas /as described in the book of O. M. Ivantsova, A. D. Daurica, "Low-temperature gas, mineral resources, 1980, page 142, 164), including the preparation with gas and pipeline isolation.

The technical result of the invention is to improve the performance of pipeline for gas transportation on long hydrated pipeline and reduce the cost of pipeline isolation.

It is the fact that the method of transportation of gas through pipelines, including the preparation of gas in it at the gas inlet in the pipeline to produce a lowering of the dew point temperature of the gas using a filter driers liquefied gases, set higher values of input parameters gas flow, pressure and temperature, and the output of the pipeline to measure the current values of output parameters of gas flow, pressure, temperature and dew point temperature, the value of which adjust the amount of drying gas to the desired value by decreasing flow and gas temperature at the outlet and lowering the dew point temperature of gas at inlet, moreover, the entire process of transporting the dried compressed gas carried out by the long wet pipe under conditions of lowering the temperature of the environment.

In the drawing given technological scheme that implements this method.

The method of gas transportation implemented as follows.

From the vault 1 sirinrat gas dew point 2 by removing the moisture from it in the form of ice crystals. Then, the liquefied gas 2 is directed to the pump evaporation plant 4, which produce the gasification of the liquefied gas by compression and evaporation and ask this increased values of input parameters gas flow, pressure and temperature. Then gasified gas is directed in a humidified 5 pipeline length up to 4 km for further transportation to the consumer.

Initial and final sections of the pipeline 5 installed meters parameters gasified nitrogen in the form of flow sensors 6 gas pressure gauges 7, thermometers 8 and devices 9 to determine the dew point at the inlet and outlet of the pipeline 5.

In the process of transportation vysokogomogennogo gas on long humidified gas due to the pressure difference across the inlet and outlet pipes there is a partial decrease in the gas temperature due to its consumption of heat for evaporation parietal layer of moisture, which is constantly present in the tube in an amount of from 50 to 100 microns (Engineering-physical journal volume 60, No. 5, 1991, S. 804). When properly organized the transportation of gas parietal layer of moisture has a minimal effect on the dew point temperature of the transported gas, in which process oulainen the final section of the pipeline 5 measured current values of output parameters of gas flow, pressure, temperature and dew point temperature, the value of which adjust the amount of drying gas to the desired value by decreasing flow and gas temperature on the yield and lowering the temperature of the dew-point gas inlet pipe. So by increasing the number of pump evaporator 4 increase the pressure and flow of gasified gas. By including additional heating elements in the evaporator pump and the evaporator unit 4 increases the temperature of the gas, and with the help of filter driers 3 carry out the lowering of the dew point at the inlet in the pipeline 5.

The entire process of transportation vysokogomogennogo gas is carried out in a lower temperature environment (at night) because when heated outdoor gas pipeline sunlight evaporation of moisture from the parietal layer of the transported vysokoosnaschenny compressed gas, which is getting worse.

The method of transportation of gas by pipeline, including the preparation of liquefied natural gas dehydration and gas, characterized in that the drying gas inlet pipe is produced by lowering the dew point temperature using filter driers liquefied gases, at a temperature and the output of the pipeline to measure the current values of output parameters of gas flow, pressure, temperature and dew point temperature, the value of which adjust the amount of drying gas to the desired value by decreasing flow and gas temperature at the outlet and lowering the dew point temperature of the gas at the entrance, and the entire process of transporting vysokogomogennogo compressed gas carried out by the long wet pipe under conditions of lowering the temperature of the environment.

 

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