SU639568A1 - Heat-mass-exchange column - Google Patents

Description

one

The invention relates to instrumentation of processes occurring in a gas (nar) -liquid system, such as absorption, distillation, and can be used in installations for separating compressed gas mixtures, such as field processing and the preparation of natural gas and condensate for transportation.

A known heat and mass transfer column comprising a housing, gas and liquid inlet and outlet pipes, plates placed in the upper part of the body, a receiving chamber located between tube sheets with heat exchanging tubes equipped with swirlers, and also a bottom part into which heat exchange tubes are inserted through the plates one.

The disadvantage of such a column is the incomplete use of gas pressure energy in heat and mass transfer processes, in particular for stripping of light fractions and condensation of heavy hydrocarbon fractions, which leads to a deterioration in the quality of the final products discharged from the column.

The purpose of the invention is to provide a more complete use of the energy of gas pressure and to improve the quality of the final products.

This is achieved by the fact that in the proposed

the column receiving chamber is located above the Cui section of the column.

The rta drawing shows a heat and mass transfer column, a longitudinal section.

The column contains a housing 1, in the upper part of which a plate 2 with overflow organizers 6 is placed. Through the plates 2, tenloexchange pipes 4 are passed, the lower part of which is filled with swirlers o. The 1 no-product ipyoKU 4s are fixed in the pipe grids of — and, between the grids of / and b, is a receiving chamber 9 located above the cuoi part of the 1U column.

The 1st rack restek V is filled with il connections, the upper part of which has a swirler i / ,, and the lower part is lowered into the part of the 1U column. About natruokah 11 coaxially placed the lower ends of the heat-insulated pipes 4 with swirlers 5.

In the pipework grating L, the pipes 15 are closed to drain the condensate-absorbent to the bottom of the column 10.

The housing 1 is equipped with a pipe 14 for introducing the raw source gas, with an inlet 1 o for introducing gas under the plates 2, a patrol 1 for supplying the aeration material, a pipe 1 / for evacuating gas from the upper part of the column housing, a fitting 18 for evacuating

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dry gas, pipe 19 for feeding the cooling condensate, pipe 20 for draining the cooling condensate from the receiving chamber 9, pipe 21 for discharging the smoke closure parasitic koppa.

The pipe 14 is supplied with a throttle valve 22, and the pipes 15 and 17 connect each other with a pipe 23 with a control valve 24.

The pipes 17 and 18 are connected by pipe 25 with a valve 26 for withdrawing a part of the gas.

The Kubov part of the coloppa 10 of the joint with the gas space of the pipeline is a grid of 8 pipes 27. Pipe 19 is equipped with a liquid distributor 28 and is connected by pipe 29 to pipe 20.

Heat and mass transfer column works as follows.

The original raw gas under high pressure enters the receiving chamber 9 through the valve 22, while it is throttled to an intermediate level, which ensures the required amount of condensate to be used as the absorbent. During throttling, the temperature of the gas stream decreases, and a partial condensation of heavy fractions occurs.

The cooled condensate-absorbent from the receiving chamber 9 through the pipeline 29 is fed through the distributor 28 for irrigation of the plates 2, where it interacts with the flow rates by means of a vapor-gas stream.

The flow of the absorbent from the top to the underlying plates 2 is carried out but non-reactive devices 3.

The gas from the receiving chamber 9 passes through the plant 12, with the formation of two streams. Peripheral hot gas-liquid mixture flow, but directed to the branch pipes I to the bottom of the column 10, where heat carried with it is used for evaporation of light fractions, and cold chain flow, swirled by swirlers 5, rises through heat exchanging tubes 4, cools the rising vapor-gas mixture, which contributes to coidepsis of the heavy fractions, which are then absorbed by the absorbent on the plates 2.

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From the space above the grate 6, the gas through the pipeline 23 is directed through the nozzle 15 under the bottom plate 2, where it is mixed with the hot stream of the vapor-gas mixture, which comes from the secondary part of the column 10 through the pipes 27.

The absorberp fed to the upper part of the coloppa through the pipe 19, after the heat and mass transfer process on the plates 2, collects on the tube sheet 8 and flows through the pipes 13 to the bottom of the column 10. Purified from various gaseous impurities, the gas stream after separation through the fitting 18 leaves the column.

If necessary, the column through the pipe 16 may be a sub-absorbent for drying or additional bleeding. The valve 24 regulates the flow rate of the gas supplied under the plate 2, and accordingly the necessary temperature condition is maintained.

Through pipe 21, stable condensate is removed from the column.

The design of the heat / mass exchange column allows simultaneous removal of natural gas and partial demethanization of the liquid product due to the use of the formation energy of the gas.

Claims (1)

Invention Formula TePoT mass and mass transfer column comprising a body, gas and liquid inlet and outlet nozzles, plates placed at the upper part of the body, a receiving chamber located between tube grids with tenlo exchange tubes equipped with swirlers, and also a bottom part into which heat exchanging tubes are inserted through the plates, characterized in that, in order to ensure a more complete utilization of the energy of the gas pressure and to improve the quality of the final products, this camera is placed above the bottom part of the coloppa. The sources of information, attributed to the examination during the examination 1. USSR author's certificate No. 305896, cl. B 01D 3/28, 1969. 25