阅读说明：本技术 用于干燥压缩气体的干燥装置和方法 (Drying device and method for drying compressed gas ) 是由 H·赫尔曼斯 于 2020-05-11 设计创作，主要内容包括：本公开涉及一种用于干燥压缩气体的干燥装置,所述干燥装置包括具有可再生干燥剂(3)的至少两个容器(2)和可调节的阀门系统(4),所述可调节的阀门系统使得一个容器(2)能够干燥压缩气体同时另一个容器(2)正在被再生,其中通过调节所述阀门系统(4),所述容器(2)能够每个依次干燥气体,其特征在于,干燥装置(1)设置有再生管道(10)用于供应再生气体,所述再生管道从用于干燥的压缩气体的出口(8)延伸到阀门系统(4),并且其中设置有加热装置(11),其中干燥装置设置有返回管道(17)用于将再生气体返回到入口(7),所述返回管道从阀门系统(4)延伸到连接到所述入口(7)的入口管道(13),其中在入口管道中安装文丘里喷射器(18),所述返回管道(17)连接到所述文丘里喷射器(18),并且设置调节装置用于调节通过文丘里喷射器(18)的气体的流量。(The present disclosure relates to a drying device for drying compressed gas, comprising at least two containers (2) with regenerable drying agent (3) and an adjustable valve system (4) enabling one container (2) to dry compressed gas while the other container (2) is being regenerated, wherein the containers (2) can each dry gas in turn by adjusting the valve system (4), characterized in that the drying device (1) is provided with a regeneration duct (10) for supplying regeneration gas, which extends from an outlet (8) for dried compressed gas to the valve system (4), and wherein a heating device (11) is provided, wherein the drying device is provided with a return duct (17) for returning regeneration gas to the inlet (7), which extends from the valve system (4) to an inlet duct (13) connected to the inlet (7), wherein a venturi ejector (18) is mounted in the inlet conduit, the return conduit (17) being connected to the venturi ejector (18), and regulating means are provided for regulating the flow rate of the gas through the venturi ejector (18).)

1. Drying device for drying compressed gas, the drying device (1) being provided with an inlet (7) for compressed gas to be dried and an outlet (8) for dried compressed gas, wherein the drying device (1) comprises at least two containers (2) containing regenerable desiccant (3) and an adjustable valve system (4) comprising a first valve block (5) and a second valve block (6) connecting the inlet (7) and the outlet (8) to the containers (2), respectively, wherein the adjustable valve system (4) is configured such that at least one container (2) can dry compressed gas while the other container (2) is being regenerated, and the containers (2) can each dry compressed gas in turn by adjusting the valve system (4), characterized in that the drying device (1) is further provided with a regeneration duct (10) for supplying regeneration gas to the container (2) being regenerated, which regeneration duct (10) extends from an outlet (8) for dried compressed gas to a second valve block (6), wherein a heating device (11) is provided for the regeneration gas in the regeneration duct (10), wherein the drying device (1) is further provided with a return duct (17) for returning regeneration gas to the inlet (7) after it has passed through the container (2) being regenerated, which return duct (17) extends from the first valve block (5) to an inlet duct (13) which is connected to the inlet (7) for compressed gas to be dried, wherein a venturi ejector (18) is mounted in the inlet duct (13), which return duct (17) is connected to the venturi ejector (18), and a regulating device is provided for regulating the flow rate of the compressed gas to be dried through the venturi ejector (18).

2. Drying device according to claim 1, characterised in that the adjusting means are formed by the fact that the venturi ejector (18) is an adjustable venturi ejector (18) which is configured such that the flow rate therethrough can be adjusted.

3. Drying device according to claim 1, characterised in that the adjusting device comprises a bypass duct (19) arranged to bypass the venturi ejector (18), wherein a valve (20) is mounted in the bypass duct (19).

4. Drying device according to any of the preceding claims, characterized in that the heating device (11) comprises a heat exchanger (12), the first section (12a) of which is mounted in the regeneration duct (10) and the second section (12b) in the inlet duct (13).

5. Drying apparatus according to any one of the preceding claims, wherein the heating means (11) comprises an external heat source (16).

6. Drying apparatus according to any one of the preceding claims, characterised in that a cooler (21) is mounted in the inlet duct (13) downstream of the venturi ejector (18).

7. Drying apparatus according to any of claims 1 to 5, characterised in that a first cooler (21) is mounted in the inlet duct (13) upstream of the Venturi ejector (18) and a second cooler (21) is mounted in the return duct (17).

8. Drying appliance according to any of the preceding claims, characterized in that at least a part of the valves (9) in the second valve block (6) are non-return valves (22).

9. Drying device for drying compressed gas, the drying device (1) being provided with an inlet (7) for compressed gas to be dried and an outlet (8) for dried compressed gas, wherein the drying device (1) comprises at least two containers (2) containing regenerable desiccant (3) and an adjustable valve system (4) comprising a first valve block (5) and a second valve block (6) connecting the inlet (7) and the outlet (8) to the containers (2), respectively, wherein the adjustable valve system (4) is configured such that at least one container (2) will dry compressed gas while the other container (2) is being regenerated, and wherein the containers (2) can each in turn dry compressed gas by adjusting the valve system (4), characterized in that the drying device (1) is further provided with a regeneration duct (10) for supplying a regeneration gas to the container (2) being regenerated, the regeneration line (10) extends from the outlet (8) for the dry compressed gas to the second valve block (6), wherein a heating device (11) is provided for the regeneration gas in the regeneration conduit (10), wherein the drying device (1) is further provided with a return conduit (17) for returning the regeneration gas to the inlet (7) after it has passed through the vessel (2) being regenerated, the return duct (17) extending from the first valve block (5) to the inlet duct (13), said inlet duct being connected to said inlet (7) for compressed gas to be dried, wherein a blower (23) is installed in the regeneration duct (10), wherein the blower (23) is an adjustable blower (23).

10. Drying device according to claim 9, characterised in that a non-return valve (24) is mounted in the return duct (17).

11. Drying apparatus according to claim 9 or 10, wherein the blower (23) is mounted upstream of the heating device (11).

12. Method for drying compressed gas using a drying apparatus (1) provided with an inlet (7) for compressed gas to be dried and an outlet (8) for dried compressed gas, wherein an inlet conduit (13) is connected to the inlet (7), wherein the drying apparatus (1) comprises at least two containers (2) containing regenerable desiccant (3) and an adjustable valve system (4) connecting the inlet (7) and the outlet (8) to the containers (2), respectively, wherein at least one container (2) will dry compressed gas while the other container (2) is being regenerated, wherein each container (2) in turn dries compressed gas by adjusting the valve system (4), characterized in that the method comprises the steps of:

-providing a regeneration gas by splitting a part of the dry compressed gas at an outlet (8);

-heating the diverted regeneration gas before it is led through the vessel (2) being regenerated;

-returning the regeneration gas to the inlet duct (13) after it has passed through the container (2) being regenerated;

-returning the regeneration gas to the inlet duct (13) by means of a venturi ejector (18), and wherein the method further comprises the step of adjusting the flow rate of the regeneration gas delivered to the inlet duct (13).

13. Method according to claim 12, characterized in that for adjusting the flow rate of the regeneration gas delivered to the inlet duct (13) an adjustable venturi ejector (18) is used.

14. Method according to claim 12, characterized in that, in order to regulate the flow of regeneration gas conveyed to the inlet duct (13), part of the compressed gas to be dried is conveyed via a bypass duct (19) bypassing the venturi ejector (18), wherein a valve (20) is installed in the bypass duct (19).

15. Method for drying compressed gas using a drying device (1) provided with an inlet (7) for compressed gas to be dried and an outlet (8) for dried compressed gas, wherein an inlet conduit (13) is connected to the inlet (7), wherein the drying device (1) comprises at least two containers (2) containing regenerable desiccant (3) and an adjustable valve system (4) connecting the inlet (7) and the outlet (8) to the containers (2), respectively, wherein at least one container (2) will dry compressed gas while the other container (2) is being regenerated, wherein each container (2) in turn dries compressed gas by adjusting the valve system (4), characterized in that the method comprises the steps of:

-providing a regeneration gas by splitting a part of the dry compressed gas at an outlet (8);

-heating the diverted regeneration gas before it is led through the vessel (2) being regenerated;

-returning the regeneration gas to the inlet duct (13) after it has passed through the container (2) being regenerated;

-further providing an adjustable blower (23) in the drying apparatus (1), the adjustable blower (23) being mounted in a regeneration duct (10) extending from an outlet (8) for dried compressed gas to the valve system, wherein the method comprises the step of adjusting the flow of regeneration gas back to the inlet duct (13) by adjusting the blower (23).

Technical Field

The present invention relates to a drying device for drying compressed gas.

Background

In particular, the invention relates to a drying apparatus provided with an inlet for compressed gas to be dried and an outlet for dried compressed gas, wherein the drying apparatus comprises at least two containers containing regenerable drying agent and an adjustable valve system connecting the inlet and the outlet to the containers, wherein the adjustable valve system is configured such that at least one container is capable of drying compressed gas while another container is being regenerated, and each container is capable of drying compressed gas in turn by adjusting the valve system.

A regenerable desiccant refers to a desiccant that is capable of extracting moisture from a gas by means of adsorption, which desiccant is capable of being dried by flowing a so-called regeneration gas through the desiccant when saturated with moisture. This process is also referred to as regeneration of the desiccant. Typically, the regeneration gas is a hot gas.

Although the principle of adsorption is mentioned here, the invention is also applicable to the principle of adsorption.

When the container is dried, it will absorb moisture from the compressed gas to be dried, so that the drying agent becomes saturated. Saturation means that the desiccant does not absorb any or only little additional moisture.

Subsequently, the vessel is then regenerated, wherein typically hot gas (e.g., hot air) is directed through the vessel. This hot gas will extract moisture from the desiccant and thus regenerate the desiccant.

The vessel can then optionally be cooled before the vessel is reused to dry the compressed gas.

Devices configured such that a portion of the dry compressed gas is used to regenerate the vessel are known.

After having been used for regeneration purposes, the regeneration gas is blown off or recombined with the compressed gas to be dried.

Although the advantage of recovering the regeneration gas is that no compressed gas is lost, it must be ensured that the regeneration gas can be recombined with the compressed gas to be dried.

In fact, the regeneration will trigger a pressure drop such that the pressure of the regeneration gas will be slightly lower than the pressure of the compressed gas to be dried, such that an external force is required to recombine the regeneration gas with the compressed gas to be dried.

In order to recombine the regeneration gas with the compressed gas to be dried, a venturi ejector may be used, which will generate a negative pressure when the compressed gas to be dried flows through the venturi ejector. Under the influence of this negative pressure, the regeneration gas can be sucked in as it is sucked in through the venturi ejector and thus recombined with the compressed gas to be dried.

A disadvantage is that a relatively large pressure drop may occur in such a venturi ejector.

Disclosure of Invention

It is an object of the present invention to provide a solution to at least one of the above and/or other disadvantages.

To this end, the invention relates to a drying device for drying compressed gas, which drying device is provided with an inlet for compressed gas to be dried and an outlet for dried compressed gas, wherein the drying device comprises at least two containers containing regenerable drying agent and an adjustable valve system comprising a first valve block and a second valve block which connect the inlet and the outlet, respectively, to the containers, wherein the adjustable valve system is configured such that at least one container can dry compressed gas while the other container is being regenerated and the containers can each in turn dry compressed gas by adjusting the valve system, wherein the drying device is further provided with a regeneration duct for supplying regeneration gas to the container being regenerated, which regeneration duct extends from the outlet for dried compressed gas to the second valve block, wherein a heating device is provided for the regeneration gas in the regeneration duct, wherein the drying device is further provided with a return duct for returning the regeneration gas to the inlet after the regeneration gas has passed through the container being regenerated, which return duct extends from the first valve block to an inlet duct connected to the inlet for the compressed gas to be dried, wherein a venturi ejector is mounted in the inlet duct, which return duct is connected to the venturi ejector, and a regulating device is provided for regulating the flow rate of the compressed gas to be dried through the venturi ejector.

This has the advantage that by regulating the flow through the venturi ejector, the pressure drop and associated energy losses can be regulated. In fact, by reducing the flow through the venturi ejector, less regeneration gas will be drawn in and the pressure drop will also be lower.

In other words, it can be ensured that there is just enough flow through the venturi ejector so that just enough regeneration gas is sucked in to allow good regeneration of the vessel to be regenerated, but not exceeding this flow.

The regulation of the flow through the venturi ejector can be accomplished in different ways.

In a practical embodiment, the adjusting means is formed by the fact that the venturi ejector is an adjustable venturi ejector which is configured such that the flow through the venturi ejector can be adjusted.

In an alternative practical embodiment, the regulating means comprises a bypass conduit arranged to bypass the venturi ejector, wherein the valve is mounted in the bypass conduit.

The valve is for example a butterfly valve or a throttle valve.

By opening the valve more or less, the flow through the bypass conduit and thus indirectly through the venturi ejector may be regulated.

The invention also relates to a drying device for drying compressed gas, which drying device is provided with an inlet for compressed gas to be dried and an outlet for dried compressed gas, wherein the drying device comprises at least two containers containing regenerable drying agent and an adjustable valve system comprising a first valve block and a second valve block, which connect the inlet and the outlet, respectively, to the containers, wherein the adjustable valve system is configured such that at least one container can dry compressed gas while the other container is being regenerated and the containers can each in turn dry compressed gas by adjusting the valve system, wherein the drying device is further provided with a regeneration duct for supplying regenerated gas to the container being regenerated, which regeneration duct extends from the outlet for dried compressed gas to the second valve block, wherein a heating device is provided for the regeneration gas in the regeneration duct, wherein the drying device is further provided with a return duct for returning the regeneration gas to the inlet after the regeneration gas has passed through the container being regenerated, said return duct extending from the first valve block to an inlet duct connected to the inlet for the compressed gas to be dried, wherein a blower is mounted in the regeneration duct, wherein the blower is an adjustable blower.

The blower constitutes an alternative to a venturi ejector, i.e. the blower will have the same function as a venturi ejector.

The invention also relates to a method for drying compressed gas using a drying apparatus provided with an inlet for compressed gas to be dried and an outlet for dried compressed gas, wherein an inlet pipe is connected to the inlet, wherein the drying apparatus comprises at least two containers containing regenerable drying agent and an adjustable valve system connecting the inlet and the outlet, respectively, to the containers, wherein at least one container will dry compressed gas while the other container is being regenerated, wherein each container in turn dries compressed gas by adjusting the valve system, wherein the method comprises the steps of:

-providing a regeneration gas by diverting a portion of the dried compressed gas at an outlet;

-heating the diverted regeneration gas before it is led through the vessel being regenerated;

-returning the regeneration gas to the inlet conduit after the regeneration gas has passed through the vessel being regenerated;

-returning the regeneration gas to the inlet conduit by means of a venturi ejector, and wherein the method further comprises the step of adjusting the flow rate of the regeneration gas delivered to the inlet conduit.

It is clear that this method possesses the same advantages as the drying apparatus according to the invention.

Preferably, the drying apparatus according to the invention is used for applying the method.

Preferably, in order to regulate the flow of regeneration gas delivered to the inlet duct, an adjustable venturi ejector is used.

Preferably, part of the compressed gas to be dried is delivered via a bypass duct bypassing the venturi ejector, in which a valve is installed, to regulate the flow of the regeneration gas delivered to the inlet duct.

The invention also relates to a method for drying compressed gas using a drying apparatus provided with an inlet for compressed gas to be dried and an outlet for dried compressed gas, wherein an inlet pipe is connected to the inlet, wherein the drying apparatus comprises at least two containers containing regenerable drying agent and an adjustable valve system connecting said inlet and said outlet to said containers, respectively, wherein said adjustable valve system is such that at least one container will dry compressed gas while the other container is being regenerated, wherein each container in turn dries compressed gas by adjusting the valve system, wherein the method comprises the steps of:

-providing a regeneration gas by diverting a portion of the dried compressed gas at an outlet;

-heating the diverted regeneration gas before it is led through the vessel being regenerated;

-returning the regeneration gas to the inlet conduit after the regeneration gas has passed through the vessel being regenerated;

-further providing an adjustable blower (23) in the drying apparatus (1), the adjustable blower (23) being mounted in a regeneration duct (10) extending from an outlet (8) for dried compressed gas to the valve system, wherein the method comprises the step of adjusting the flow of regeneration gas back to the inlet duct (13) by adjusting the blower (23).

It is clear that the method also possesses the same advantages as the drying apparatus according to the invention.

Preferably, the drying apparatus according to the invention is used for applying the method.