RU2326719C2 - Device for dehumidification of compressed gas - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: device contains two adsorbers 1, 2 connected by main pipeline 3, 18-23. The valve system 4 provides switching the adsorbers 1, 2 from dehumidification mode to regeneration mode. At the body surface of each adsorber 1, 2, the gas pipes 7 are installed with the heating unites 8. At the gas pipes 7 outputs, in the area of interaction with the sorbent, the filters 9 are installed. The main gas pipe 20 for regeneration mode is connected to gas pipe 7 outputs via check valve and to gas pipe 7 inputs via choke 15.

EFFECT: invention increases efficiency of device and reduces energy loss and mass-size characteristics.

4 cl, 1 dwg

Description

The invention relates to the oil and gas industry and can be used in technological operations in the process of extraction and transportation of natural and oil gas.

Recently, during the extraction and transportation of natural gas, the concept of increasing the reliability and environmental friendliness of technological equipment and automation devices that provide the specified parameters of the technological cycle of this process, while reducing energy consumption, in which the process of gas drying and condensate removal plays an important role, has been approved.

Known devices for air drying, including two adsorbers connected by pipelines that are connected with valves, providing switching of their operating modes from the drying mode to the regeneration mode on command from the valve control system (see Japan application No. 61-35891 B, MKI B01D 53 / 26 of 08/15/86).

Known and closest in technical essence to the proposed is a device for drying compressed gas (RF patent No. 2165686, IPC B01D 53 \ 36 2001 - prototype), containing two adsorbers connected by pipelines with valves installed on them, which provide alternate switching of adsorbers from the drying mode to the regeneration mode, a throttle with a pipeline for supplying dried gas at reduced pressure to the regenerated adsorber and a moisture separator with a moisture drain valve that opens according to the switching rhythm of the adsorbers.

The disadvantages of the known device are the increased weight and size characteristics of the device, lack of efficiency with increased energy consumption.

The task of the invention is to reduce the overall dimensions of the device, increase its efficiency and reduce energy loss.

This task is achieved by the fact that in a device containing two adsorbers with an adsorbent placed in them, connected by main pipelines, a valve system for switching the adsorber from the drying mode to the regeneration mode, according to the invention, gas ducts are installed on the walls of the body of each adsorber, on which a heating element, at the outlet of the gas duct, in the zone of gas interaction with the sorbent, a filter is located. In addition, an input device connected to the gas inlet for supplying gas to the adsorber (in the regeneration mode) and the main pipeline is made in the middle part of the housing, and an output device connected to the gas outlet and the main pipeline is made in the lower part of the body, and between the main pipeline and inlet and outlet devices are equipped with a throttle and a check valve, and the bottom and top cover of both adsorbers are detachable.

The specified set of features exhibits new properties, namely, that in the known solution, due to the implementation of the generatrix of each of the gas duct adsorbers, on the walls of which a heating element is installed, firstly, the overall dimensions of the device are reduced due to the spatial combination of the heater and adsorber, and secondly, heat loss is reduced, because the heater is located directly on the wall of the gas duct, and the location at the outlet of the gas duct of the filter also reduces the overall dimensions and increases the efficiency of gas filtration due to the possibility of increasing the working surface of the filter. In addition, the location of the input device in the middle part of the housing increases the efficiency of energy exchange of gas in the regeneration mode by reducing unproductive heat losses and partial heating of the sorbent, and therefore the whole installation. The presence of an outlet device and a non-return valve in the lower part of the casing, and in the middle part of the inlet casing and the throttle, allows to reduce the path of the outlet gas without directing it along the ducts, which reduces the total pressure drop by reducing the gas path resistance. The implementation of the bottom and the cover of the adsorbers detachable increases efficiency and reduces the time of routine maintenance. All this leads to an increase in the efficiency of the device, lower energy losses.

A diagram of the proposed device is shown in the drawing, where

1, 2 - adsorber;

3 - trunk pipeline;

4 - system of control valves;

5 - sorbent;

6 - adsorber body;

7 - gas duct;

8 - heating element;

9 - filter;

10 - input device;

11 - output device;

12 - humidity sensor;

13 - the bottom of the adsorber;

14 - an adsorber cover;

15 - throttle;

16 - check valve;

17 - valve;

18, 19, 20, 21, 22, 23 - trunk pipelines.

The device consists of adsorbers 1 and 2, main pipelines 3, 18-23, a system of control valves 4, designed to periodically switch the adsorbers as the sorbent 5 is saturated with moisture from the drying mode to the regeneration mode.

A gas duct 7 is made along the generatrix of the housing 6 of each of the adsorbers 1, 2, and a heating element 8 is installed on the walls of them. A filter 9 is located at the outlet of the gas duct 7 in the zone of interaction with the sorbent 5. An input device 10 connected to the input is made in the middle part of the housing gas duct 7. In the lower part of the housing, an outlet device 11 is connected to the outlet of the gas duct 7, and inlet and outlet devices 10, 11 and main pipelines 20, 22 are equipped with chokes 15 and check valves 16. To facilitate the replacement of the sorbent 5 and amenities and installation work, the cover 14 and the bottom 13 of the adsorbers 1, 2 are removable.

The device operates as follows.

Wet gas through the main pipelines 3, 18 enters the adsorber 1. After passing the sorbent 5, it is dried and through the filter 9, the outlet device 11, the check valve 16, the main pipelines 20, 21, 22 are fed to the consumer. In this case, the input device 10 is throttled by the throttle 15, which eliminates the flow of gas into the gas duct 7 and clogging of the channels of the gas duct 7 with unfiltered particles of sorbent 5 and reduces the total pressure drop by reducing the gas path. The heating element 8 is turned off.

For regeneration of the adsorber 2 (drying of the sorbent), dried gas is used, which, having passed through the main pipeline 22 (at reduced pressure, by throttling through the throttle 15), the input device 10, the gas duct 7 enters the regenerated adsorber 2. In this case, the heating element 8 located on the wall of the gas duct 7 is turned on, valve 17 is open. Passing the gas duct 7, the dried gas is heated, the sorbent 5 is dried, and discharged into the atmosphere through the main pipeline 19 and 23. Due to the placement of the gas duct 7 inside the adsorber, the overall dimensions are reduced, unproductive heat losses are reduced, which increases the efficiency of the device due to partial heating of the sorbent.

After drying the adsorbent 5 of the adsorber 2, the valve 17 closes the main pipeline 23. The adsorber 2 goes into standby mode.

When the adsorbent 1 adsorbent 1 is saturated with moisture by the signal of the humidity sensor 12, the system of control valves 4 switches the adsorbers 1 and 2, valve 17 opens the discharge main pipe 23 to the atmosphere, and the process repeats. In this case, the adsorber 2 operates in the drying mode, the adsorber 1 in the regeneration mode.

Thus, the use of the proposed device will improve the efficiency, reduce power consumption and its overall dimensions.

Claims (4)

1. A device for drying compressed gas, including two adsorbers with a sorbent, connected by main pipelines for supplying gas to the sorbent and its outlet, a system of valves that switch adsorbers from the drying mode to the regeneration mode, a choke, characterized in that on the surface of each of the adsorbers are made gas ducts equipped with heating elements, at the same time, a filter is located at the outlet of the gas duct in the zone of interaction with the sorbent, and the main gas supply pipeline for the regeneration mode is connected through sister valve with the outlet of the gas duct and through the throttle - with the entrance to the gas duct. 2. The device according to claim 1, characterized in that the gas inlet is made in the middle part of the canister, and the outlet is in its lower part. 3. The device according to claim 1 or 2, characterized in that the bottom of the housing of both adsorbers is made detachable. 4. The device according to claim 3, characterized in that the top cover of both adsorbers is detachable.