CN204147734U - The empty separating and purifying device of a kind of runner - Google Patents

Abstract

A rotary air separation and purification device, the device includes an air filter, an air compressor, an air precooling tower, an air purification device and an air booster connected in sequence, and the air purification device includes spaced air pipes, regenerative hot air pipes and the regenerative cold air pipeline, which also includes a rotary adsorber and a rotating motor connected with the rotary adsorber and controlling its rotation. The regeneration heating zone and the regeneration cooling zone, the adsorption zone, the regeneration heating zone and the regeneration cooling zone are evenly arranged with a plurality of compartment grids, and adsorbents are installed between the compartment grids; the utility model also provides an air separation and purification method, through Optimize the process flow of the air separation purification system to simplify its program control system to reduce the incidence of failures, to maintain the excellent adsorption performance of the adsorbent, improve the working efficiency of the air separation purification system, and prolong the life of the air separation equipment.

Description

A rotary air separation and purification device

technical field

The utility model belongs to the technical field of air separation, in particular to a rotary air separation and purification device.

Background technique

Air separation system occupies a vital position in industrial fields such as coal chemical industry and clean coal power generation. The principle applied in the modern large-scale air separation process is to use the difference in the boiling point of each component in the air at low temperature to liquefy the air through a series of processes, and use the distillation column to separate the components and obtain high-purity gas products . In order to prevent substances such as moisture and carbon dioxide in the air from forming ice and dry ice after entering the low-temperature zone of the air separation equipment, thereby blocking the heat exchanger channels and small holes on the tray plate, the gas is first passed into the purification system before entering the fractionation tower. The air separation purification system is a device that removes impurities such as moisture, carbon dioxide and hydrocarbons in the air, thereby improving the stability and efficiency of the air separation process and preventing the moisture and carbon dioxide in the air entering the tower from affecting the normal operation of the equipment. The air purification unit is the core equipment in the air purification system, and its air treatment scale and effect directly affect the scale, operation stability and economy of the entire air separation system.

The existing air separation plant purification system is generally composed of two switchable adsorbers (i.e., air purification devices), regenerative heating equipment, valves, pipelines, instrumentation and electronic controls, etc. During normal operation, one adsorber is adsorbed, and the other is regenerated. After one adsorption is saturated, the other regenerated adsorber will be put into use. Due to the large difference between the adsorption environment and the regeneration environment of the adsorber, at least four steps including decompression, heating, cooling, and boosting are required when switching from saturation to regeneration. There are many control points, and the pipeline layout and program control system are complicated. Therefore, there are many problems in the actual operation of the process of using two adsorbers alternately and its control system. Valve misoperation, program-controlled valve failure, logic misjudgment, abnormal switching of the purification system, and unreasonable pipeline layout will lead to water in the molecular sieve, incomplete adsorption, incomplete regeneration, water accumulation in the emptying pipeline, etc., which will affect the production economy. Both sex and security have huge implications. It can be seen that optimizing the air separation purification process and streamlining the purification program control steps is an effective way to maintain the excellent adsorption performance of the adsorbent, improve the working efficiency and economy of the air separation purification system, and reduce accidents.

Contents of the invention

In order to solve the problems existing in the above-mentioned prior art, the purpose of this utility model is to provide a rotary air separation and purification device, by optimizing the process flow of the air separation and purification system to simplify its program control system to reduce the incidence of failure, so as to keep the adsorbent Excellent adsorption performance, improve the working efficiency of the air separation purification system, and prolong the life of the air separation equipment.

In order to achieve the above object, the utility model adopts the following technical solutions:

A kind of wheel air separation and purification device comprises an air filter 1, an air compressor 2, an air precooling tower 3, an air purification device 4 and an air booster 5 connected in sequence, and the air purification device 4 includes spaced apart The air duct, the regenerative hot air duct and the regenerative cold air duct also include a rotor-type adsorber 6 and a rotating motor 7 connected with the rotor-type adsorber 6 and controlling its rotation. The hot air duct and the regenerative cold air duct are divided into upper and lower parts. At the same time, the air duct, the regenerative hot air duct and the regenerative cold air duct divide the runner-type adsorber 6 into an adsorption zone 14, a regenerative heating zone 15 and a regenerative cooling zone 16. In the zone 14, the regenerative heating zone 15 and the regenerative cooling zone 16, there are a plurality of grid plates 17 evenly arranged, and the adsorbent 18 is installed between the grid plates 17; the lower part of the air pipeline is divided into the air precooling tower 3 Connected air inlet pipeline 8, the upper part is the air outlet pipeline 9 connected with the air booster 5, the upper part of the regeneration hot air pipeline is the regeneration hot blast inlet pipeline 10, and the lower part is the regeneration hot blast outlet pipeline 11. The upper part of the cold air duct is the regenerative cold air inlet duct 12 , and the lower part is the regenerative cold air outlet duct 13 .

The rotary adsorber 6 is a single-layer or double-layer structure.

The wheel-type adsorber 6 has a double-layer structure, the lower layer is provided with activated alumina, and the upper layer is provided with molecular sieves.

The area of the adsorption zone 14 , the regeneration heating zone 15 and the regeneration cooling zone 16 is 2:1:1.

Rotary mechanical seals are used between the air duct, regeneration hot air duct and regeneration cold air duct and the runner-type adsorber 6 .

The rotary mechanical seal adopts flexible contact seal, double seal or brush seal.

The air filter 1 is a self-cleaning air filter.

Compared with the prior art, the utility model has the following advantages:

1) The utility model belongs to a device for removing impurities in the air. Through physical adsorption, regeneration and other processes, a large amount of carbon dioxide, carbohydrates and water vapor in the air can be removed with high efficiency to ensure that the air is pure and dry.

2) By setting the adsorber as a runner structure, an adsorption zone, a regeneration heating zone and a regeneration cooling zone are formed around the runner, and the runner slowly passes through these three regions in turn during rotation. Compared with the technological process of switching between two adsorbents, the utility model makes the adsorption and regeneration process of the adsorbent continuous, and the adsorbent with a certain size of the adsorption area enters the complete regeneration environment from a complete adsorption environment to a complete regeneration environment. The process of slow adaptation does not need to increase or decrease the pressure, thus simplifying the program control steps, reducing the number of program control valves, and reducing the molecular sieve carrying water caused by valve misoperation, program control valve failure, logic misjudgment or unreasonable pipeline layout , Incomplete adsorption, incomplete regeneration, and water accumulation in emptying pipelines, etc., greatly improve the reliability and economy of the air separation system, thereby prolonging the life of the equipment.

3) The device of the utility model has a compact structure, and the adsorption area, the regeneration heating area and the regeneration cooling area are closely connected in space, and there is no need for complicated bypass pipes and vent pipe connections, which not only improves the working efficiency of the air separation and purification system, but also saves space. The floor space and manufacturing cost of the separation and purification system.

4) The structure is simple, the process operation and control process are simplified, and it is easy for the operator to understand and control, which can effectively reduce the operation risk and increase the production efficiency.

Description of drawings

Fig. 1 is the structure and flow diagram of the utility model runner air separation and purification device.

Figure 2 is a schematic top view of the air purification device.

Figure 3 is a schematic diagram of the structure of the air purification device viewed from the bottom.

in,

1—air filter; 2—air compressor; 3—air precooling tower; 4—air purification device; 5—air booster; 6—rotary adsorber; 7—rotation Motor; 8—air inlet pipe; 9—air outlet pipe; 10—regeneration hot air inlet pipe; 11—regeneration hot air outlet pipe; 12—regeneration cold air inlet pipe; 13—regeneration cold air outlet pipe; 14— — Adsorption area; 15 — Regeneration heating area; 16 — Regeneration cooling area; 17 — Storage grid; 18 — Adsorbent.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

As shown in Fig. 1, Fig. 2 and Fig. 3, a kind of wheel air separation and purification device of the present invention comprises an air filter 1, an air compressor 2, an air precooling tower 3, an air purification device 4 and an air Supercharger 5, said air purification device 4 includes spaced air ducts, regenerative hot air ducts and regenerative cold air ducts, and also includes a rotor-type adsorber 6 and a rotating motor connected to the rotor-type adsorber 6 and controlling its rotation 7. The runner-type adsorber 6 divides the air duct, regeneration hot-air duct and regeneration cold-air duct into upper and lower parts, while the air duct, regeneration hot-air duct and regeneration cold-air duct divide the rotor-type adsorber 6 into adsorption zones respectively 14. The regeneration heating zone 15 and the regeneration cooling zone 16, the adsorption zone 14, the regeneration heating zone 15 and the regeneration cooling zone 16 are evenly arranged with a plurality of compartment panels 17, and the compartment panels 17 are equipped with adsorbents 18 The lower part of the air duct is the air inlet duct 8 connected with the air precooling tower 3, the upper part is the air outlet duct 9 connected with the air booster 5, and the upper part of the regeneration hot blast pipeline is the regeneration hot blast inlet The lower part of the pipe 10 is a regenerated hot air outlet pipe 11 , the upper part of the regenerated cold air pipe is a regenerated cold air inlet pipe 12 , and the lower part is a regenerated cold air outlet pipe 13 . The air is pressurized to 0.6MPa by the air compressor 2, and then passes through the air precooling tower 3 from bottom to top, and is cleaned while the temperature is cooled from 350K to 310K. Afterwards, the air enters the air inlet pipeline of the purification device 4, and passes through the rotor type adsorber 6, and carbon dioxide, carbohydrates and residual water vapor in the air are adsorbed. The purified air goes to other links of the air separation system after being pressurized by the air booster 5

The rotary adsorber 6 is a single-layer or double-layer structure. Preferably, for a large-scale air separation and purification system, the rotor-type adsorber 6 is a double-layer structure, the lower layer is filled with 500mm activated alumina, and the air is initially dried by using it; the upper layer is filled with a 1000mm molecular sieve, which can selectively adsorb Impurities such as carbon dioxide, moisture, and hydrocarbons. The lower alumina bed replaces the molecular sieve to absorb water, which can effectively protect the molecular sieve, increase the capacity of the molecular sieve to absorb other impurities, and prolong the service life of the molecular sieve.

As a preferred embodiment of the present invention, the area of the adsorption zone 14 , the regeneration heating zone 15 and the regeneration cooling zone 16 is 2:1:1.

As a preferred embodiment of the present utility model, a rotary mechanical seal is used between the air duct, the regeneration hot air duct and the regeneration cold air duct and the rotor-type adsorber 6 .

As a further preferred embodiment of the present invention, the rotary mechanical seal adopts flexible contact seal, double seal or brush seal.

As a preferred embodiment of the present utility model, the air filter 1 is a self-cleaning air filter.

The working principle of the utility model is: after the air is filtered by the air filter 1 and pressurized by the air compressor 2, it passes through the air pre-cooling tower 3 from bottom to top, enters the adsorption area 14 from the air inlet pipe 8, and is first activated by the active Alumina absorbs water, and then molecular sieves absorb carbon dioxide and acetylene impurities. Carbon dioxide, carbohydrates and water vapor in the air are absorbed to become pure air, and the pure air enters the air booster 5 through the air outlet pipe 9; Simultaneously, the runner-type adsorber 6 is driven by the rotating motor 7 and rotates continuously at a slow speed. , the hot air from the regenerative hot air inlet pipe 10 will heat and desorb the adsorbent 18, thereby taking away the impurities adsorbed by the adsorbent 18, and discharge them through the regenerated hot air outlet pipe 11; The adsorber 6 rotates to the regenerative cooling zone 16, and the cold wind from the regenerative cold air inlet pipe 12 will blow it coldly, thereby cooling the adsorbent 18; The adsorber 18 completes an adsorption and regeneration cycle.

As a preferred embodiment of the present invention, the wheel-type adsorber 6 is driven by the rotating motor 7 to rotate clockwise at a constant speed of 0.25πrad/h, and the rotation period is 8h.

The hot air component is one or more mixtures of high-temperature dry nitrogen, oxygen and argon, and the temperature is between 150 ° C and 200 ° C; the cold air component is normal temperature dry nitrogen, oxygen and argon One or more mixed gases, the temperature is between 10°C and 20°C.

The method of the utility model simplifies the program control system and pipeline valve arrangement of the air purification system by optimizing the air purification process flow. Compared with conventional air purification methods, this method not only reduces floor space, simplifies pipeline layout, and saves costs, but also reduces the risk of valve misoperation, program-controlled valve failure, logic misjudgment or Safety risks caused by unreasonable pipeline layout. After applying this method for a long enough period of time, there is no occurrence of any molecular sieve carrying water, incomplete adsorption, incomplete regeneration, and water accumulation in the emptying pipeline, and the content of impurities such as carbon dioxide in the purified air has always been lower than 1ppm. Owing to being able to operate under such good conditions all the time, the method of the utility model can prolong the service life of molecular sieves and related equipment by 1 to 2 years.

Claims (7)

1. a wheel air separation and purification device, comprising successively connected air filter (1), air compressor (2), air precooling tower (3), air purification unit (4) and air booster (5 ), characterized in that: the air purification device (4) includes spaced air ducts, regeneration hot air ducts and regeneration cold air ducts, and also includes a runner-type adsorber (6) and is connected to the runner-type adsorber (6) And control the rotating motor (7) of its rotation, the described runner type adsorber (6) divides the air duct, the regenerating hot air duct and the regenerating cold air duct into upper and lower parts, and simultaneously the air duct, the regenerating hot air duct and the regenerating cold air duct will The runner type adsorber (6) is divided into adsorption zone (14), regeneration heating zone (15) and regeneration cooling zone (16) respectively, described adsorption zone (14), regeneration heating zone (15) and regeneration cooling zone ( 16) is evenly arranged with a plurality of storage grids (17), and adsorbents (18) are housed between the storage grids (17); the lower part of the air pipeline is connected to the air precooling tower (3). The air inlet pipe (8), the upper part is the air outlet pipe (9) connected with the air booster (5), the upper part of the regeneration hot air pipe is the regeneration hot air inlet pipe (10), and the lower part is the regeneration hot air outlet A pipe (11), the upper part of the regenerated cold air pipe is a regenerated cold air inlet pipe (12), and the lower part is a regenerated cold air outlet pipe (13). 2. A kind of wheel air separation and purification device according to claim 1, characterized in that: the wheel type adsorber (6) is a single-layer or double-layer structure. 3. a kind of runner air separation purification device according to claim 2, is characterized in that: for large-scale air separation purification system, described runner type adsorber (6) is a double-layer structure, and activated alumina is set in the lower floor; Molecular sieves are set on the upper layer. 4. a kind of wheel air separation purification device according to claim 1, is characterized in that: the area of described adsorption zone (14), regeneration heating zone (15) and regeneration cooling zone (16) is 2:1: 1. 5. A rotary air separation and purification device according to claim 1, characterized in that: a rotary mechanical seal is used between the air pipeline, the regeneration hot air pipeline and the regeneration cold wind pipeline and the rotor type adsorber (6). 6. A rotary air separation and purification device according to claim 5, characterized in that: said rotary mechanical seal adopts flexible contact seal, double seal or brush seal. 7. A rotary air separation and purification device according to claim 1, characterized in that: the air filter (1) is a self-cleaning air filter.