RU220951U1 - DEVICE FOR CLEANING AMINE SOLUTION - Google Patents

Abstract

The utility model relates to a device for purifying aqueous amine solutions and can be used in technological processes at oil refineries. A device for cleaning an amine solution contains an inlet pipeline that is divided into two parallel cleaning lines, each of which is equipped with a filter for mechanical impurities, a pump for injecting the amine solution, a fine filter, an adsorber filter and an additional fine filter, which are connected in the specified sequence between themselves by pipelines. All components of the device are placed and secured on the vehicle platform, the inlet pipeline is connected to the inlet of the hydraulic accumulator, the outlet of which is connected to the pipelines of two parallel cleaning lines. The output pipelines of additional fine filters of each cleaning line are connected to the inputs of the receiving storage tanks for the purified amine solution, and the output pipelines of the storage tanks are connected by means of a manifold on which a pipe for the outlet of the purified amine solution is located. The technical result is the creation of a movable device for purifying an amine solution, ensuring the stability of the purification process of an amine solution. 2 ill.

Description

The utility model relates to equipment in the oil and gas refining industry, in particular to a device for purifying aqueous solutions of amine (methyldiethanolamine), used in technological processes at oil and gas refineries as a means for neutralizing hydrogen sulfide.

Currently, there are problems with unstable operation of columns and increased corrosion in amine purification units from hydrogen sulfide installations of oil refineries and gas processing plants. This is due to the following phenomena:

- destruction (decomposition) of amine (methyldiethanolamine);

- corrosion activity;

- foaming of amine solution on hydrogen sulfide purification units.

In this regard, regular deep cleaning (filtration) of the amine solution is required. At the same time, modernization of oil and gas processing equipment in existing production conditions by inserting stationary devices for purifying aqueous solutions into each installation requires significant material and financial costs.

A device for purifying an aqueous amine solution is known from the prior art, containing an inlet pipeline that is divided into two parallel purification lines, each of which is equipped with a filter for mechanical impurities, a pump for injecting the amine solution, a fine filter, an adsorber filter, and an additional fine filter. , which in the specified sequence are interconnected by pipelines, the outputs from the additional fine filters of each parallel cleaning line are combined into the output pipeline of the installation, and the pipeline between the fine filter and the adsorber filter of one line is connected to the pipeline between the adsorber filter and the additional fine filter another line with a bypass pipeline (patent RU 216329 U1, published 01/30/2023).

The known technical solution is intended mainly for stationary operation as part of oil and gas refining equipment and it has a technical disadvantage, which manifests itself in the instability of the amine solution purification process due to pressure instability in parallel purification lines, which can lead to a stop in the continuous oil or gas refining process . In addition, the manufacture of stationary devices for purifying amine solution requires significant material costs to ensure stable operation of each piece of oil or gas processing equipment.

The technical objective of the claimed utility model is to eliminate these shortcomings, namely, to increase the stability of oil and gas processing columns and reduce corrosion in amine treatment units of oil refineries and gas processing plants.

The technical result of the proposed technical solution is the creation of a movable device for purifying an amine solution, which ensures the stability of the purification process of an amine solution due to stable pressure in parallel purification lines.

The technical result is achieved by the fact that in a device for purifying an amine solution, containing an inlet pipeline that is divided into two parallel purification lines, each of which is equipped with a filter against mechanical impurities, a pump for injecting the amine solution, a fine filter, an adsorber filter and an additional filter fine cleaning, which in the specified sequence are connected to each other by pipelines, according to the utility model, all components of the device are placed and fixed on the vehicle platform, the input pipeline is connected to the inlet of the hydraulic accumulator, the outlet of which is connected to the pipelines of two parallel cleaning lines, the output pipelines of additional filters fine cleaning of each cleaning line is connected to the inputs of the receiving storage tanks for the purified amine solution, and the output pipelines of the storage tanks are connected by means of a manifold on which a pipe for the outlet of the purified amine solution is located.

The utility model is illustrated by drawings.

In fig. 1 shows a general view of a device for purifying an amine solution, side view; in fig. 2 - general view of the device for purifying amine solution, top view.

A device for purifying an amine solution contains a vehicle (not shown) with a platform 1 on which all the components of the device are located, in particular, a hydraulic accumulator 2, the input of which is connected to the inlet pipeline 3 for supplying the amine solution to be purified, while the hydraulic accumulator 2 provides stabilization hydraulic pressure in the elements of the device for cleaning the amine solution and prevents hydraulic shocks. The device is also equipped with pipelines 4 connected to the output of the hydraulic accumulator 2 for supplying, through pumps 5, the amine solution to be purified into two parallel cleaning lines, each of which is equipped with a pre-filter 6 for cleaning from mechanical contaminants, a fine filter connected in series via pipelines (not shown) cleaning 7, adsorbing filter 8 and additional fine filter 9. The output pipelines from the filters 9 (not shown) are connected to the receiving storage tanks 10 for the purified amine solution, and the output pipelines 11 of the storage tanks 10 are connected by a manifold 12, on which there is a pipe with a shut-off device (not shown) for the outlet of the purified amine solution.

A movable device for purifying an amine solution can be moved to any place convenient for a specific process equipment, which provides the convenience of connecting temporary flexible pipelines to the inlet pipe 3 of the device and a pipe with a locking device (not shown) for the outlet of the purified amine solution. Once the amine solution purification process is complete, the temporary flexible piping is disconnected from the device, which can be moved to the location of other oil or gas processing equipment.

In the utility model, the purification of an aqueous amine solution is carried out through four purification stages. At the first stage, the amine aqueous solution is filtered from large mechanical contaminants with sizes greater than 200 microns. At the second stage, fine purification of the aqueous amine solution is carried out from mechanical particles with sizes greater than 100 microns, which are formed, as a rule, as a result of corrosion of oil and gas processing equipment, as well as the destruction of the aqueous amine solution. At the third stage of purification, adsorption filtration of the amine solution from resins and other soluble products of amine destruction is carried out using a granular adsorbent, for example, activated carbon with an ion-exchange resin, and a filtration fineness of 50 to 100 microns is achieved. The fourth cleaning stage is designed to capture adsorbent particles (coal dust/ion exchange resin) that inevitably form during filter operation, while achieving a filtration fineness of no more than 50 microns. Hydraulic accumulator 2 and storage tanks 10 make it possible to ensure pressure stability in the hydraulic elements (pipelines, fittings, etc.) of parallel lines and increase the stability of the technological process for purifying the amine solution.

The use of this utility model makes it possible to increase the efficiency of work on the purification of amine solutions by reducing the time for transporting contaminated amine solutions and to carry out a stable technological purification process directly in the area where oil and gas processing equipment is located.

Claims (1)

A device for cleaning an amine solution, containing an inlet pipeline that is divided into two parallel cleaning lines, each of which is equipped with a filter for mechanical impurities, a pump for injecting the amine solution, a fine filter, an adsorber filter and an additional fine filter, which are in the specified sequence are connected to each other by pipelines, characterized in that all components of the device are placed and fixed on the vehicle platform, the input pipeline is connected to the inlet of the hydraulic accumulator, the outputs of which are connected to the pipelines of two parallel cleaning lines, the output pipelines of additional fine filters of each cleaning line are connected to inputs of receiving storage tanks for purified amine solution, and the output pipelines of the storage tanks are connected by means of a manifold on which a pipe for the outlet of purified amine solution is located.