SU1318609A1 - Method for preparing gas condensate for transportation - Google Patents

Abstract

The invention relates to a method for the preparation of gas condensate and can be used in the gas industry. In order to increase the productivity of the process, the gas condensate flow of the high-pressure primary cleaning separators is evaporated. The resulting vapor phase is sent to the lower plates of the stabilization column for rectification. The gas condensate flow of low-temperature separators of the low-temperature separation unit is directed to the middle and to the top of the deethanization column. The bottom product of this column is subjected to rectification in a stabilization column. As a result, the amount of raw materials entering the rectification is reduced from 100 to 37 wt.%, And the content of the propane-butane fraction increases from 3.37 to 9.35 wt.%, 1 hp. f-ly, 1 ill. i cl 00 a

Description

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The invention relates to a method for preparing for the transport of gas condensate and can be used in gas industry.

The purpose of the invention is to increase the productivity of the process.

The drawing is a schematic diagram of the method.

Gas, condensate from separators

I and 2 of the primary separation of the low-temperature condensation plant after the time; a; the trees from the produced water and through the separator 3 are fed to the recuperative heat exchanger 4 and the primary heater 5 for heating, then throttled and sent to the phase separator 6, where it is divided into steam phase containing methane-ethanol and propane-butane fractions, and the liquid phase is a stable condensate that is cooled in a heat exchanger

4 and sent to a stable condensate line.

The vapor phase is fed to the lower plates of the dethanization column 7, and deethanization gases are removed from the top of the column.

The gas condensate stream from low-temperature separators 8 at sub-zero temperature is sent to the end cooler 9 to cool the propane butane fraction and, the heated condensate from the cooler 9 is fed to the degasser separator 10, where it is separated from the saturated glycol and fed to the deethanization column. Part of the condensate is fed to the upper plates of the column as cold irrigation, the main stream after heating in the recuperative heat exchanger

I1 is introduced into the middle of the column, and the product of the column 7, de-ethanizacin, is fed to the debutanizer - stabilization column I2. The bottom product of the column, the stable gasoline fraction after cooling in the regenerative heat exchanger 11, is sent to the pipeline of stable condensate, the top product of this column is the propane-butane fraction,

I

Example, Gas Condensate

Low-temperature separation units (LTS) are fed to the condensate stabilization unit by two streams separately from high-pressure separators, installed 1B) OC to throttles, and from low-temperature separators.

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In primary separators, 70 wt.% Of the total amount of condensate produced in the field is captured. Propane-butane content

fraction (PBP) is 1.75 wt.% (Cj 0.884; 0.381; 0.538). In low-temperature separators, 30 wt.% Of the total amount of condensate obtained in the field with a PBF content of 7.44 wt.% (Cj 3.466;, 341; 2.439) is released.

Gas condensate from high pressure separators from gshastovoy water 1 and partial degassing,

heated to 200-220 ° C and subjected to a single evaporation with the separation of the vapor phase in the amount of 10% of the condensate entering the evaporator. The content of PFB in selected steam

phase 17.5 wt.%

The vapor phase from the evaporator is directed to the bottom of the de-ethanization column (the condensate stream withdrawn from the low-temperature separators is sent here)

Thus, raw materials are fed to the rectification in two columns, in which the content of PBF is 9.35 wt.%. By a known method

the content in the raw material of PBF is 3.368 wt.%. The amount of feedstock is 37 wt.% Of the total amount of condensate discharged from the NTS installation, t, e, approximately 2.7

times less than by a known method. Kpcwe, by the proposed method, it is possible to simultaneously receive fractions of motor fuels,

Claims (2)

Invention Formula G, A method of preparing for the transport of gas condensate of a low-temperature separation unit by rectification in a de-ethanization column to produce a methane-ethane fraction and bottom product, followed by rectification in a stabilization column to produce the target product and propane gas. of the butane fraction, cooling part of the latter and returning it as an irrigation to the stabilization column, characterized in that, in order to increase the productivity process, using gaseous condensate discharged separately by the first stream from the high-pressure primary purification separators and the second stream from the low-temperature separators of the low-temperature separation plant with the first stream to be evaporated to obtain the target product in the liquid phase and the vapor phase containing methane gas and - pan-butane fraction, the second stream - in the middle and to the top of the decantation column, and obtained during the evaporation of the vapor phase - on the bottom plates of this column, 2. Method POP.1, characterized in that when cooling the propane-butane fraction using condensate of low-temperature separators. yy ) WITH her: Compiled by N. Korolyov Editor V. Petrash Tehred M. Morgental Corrector I. Muska Order 2479/22 Circulation 463 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 4/5, Moscow Production and printing company, Uzhgorod, st. Design, 4.