CN207300605U - A kind of device of definite space division purification system regeneration period - Google Patents

Abstract

A kind of device of definite space division purification system regeneration period, the device include molecular sieve adsorber, immobilizing foundation, exits and entrances valve, gas pipeline, connection flexible pipe, limiting device, support platform and weight test sensor；In adsorption process, for molecular sieve adsorber after the water in adsorbing air, carbon dioxide, hydrocarbon hydrogen compound, state is changed into saturation state from drying regime, and weight increases to m+ △ m by m；In regenerative process, water, carbon dioxide, hydrocarbon in molecular sieve adsorber, the high temperature dirt nitrogen passed sequentially through and low temperature dirt nitrogen are taken away, and state is changed into drying regime from saturation state, and weight reverts to m from m+ △ m；Measured by weight test sensor and record the time of molecular sieve adsorber adsorption process weight change and the time of regenerative process weight change, select regeneration period of the longer time as purification system；This method principle is simple, can accurately determine the regeneration period of molecular sieve, can effectively save energy, reduce the power consumption of space division.

Description

A device for determining the regeneration period of an air separation purification system

technical field

The utility model relates to the technical field of absorption and regeneration of an air separation and purification system, in particular to a device for determining the regeneration period of the air separation and purification system by using a "weighing method".

Background technique

In recent years, with the rapid development of coal chemical industry, metallurgical industry, petroleum industry and other enterprises, the demand for oxygen, nitrogen and argon is increasing day by day, and the number of extra large air separation units is increasing. As the unit with the highest energy consumption in these industries, air separation has always been an important topic to optimize its operation and save energy and reduce consumption.

At present, molecular sieves are generally used in large and medium-sized air separation purification systems to absorb moisture, carbon dioxide, and hydrocarbons in the air. Molecular sieves play an important role in ensuring the safe operation of the entire set of equipment in the air separation unit.

The working cycle of molecular sieves in almost all purification systems in air separation units is to absorb and regenerate according to the preset adsorption time, hot purge time and cold purge time, which does not consider the adsorption results of molecular sieves in the previous cycle. , and the regeneration process without considering factors such as the flow rate and temperature of the purge nitrogen gas will inevitably lead to useless work of some energy. Accurate determination of the regeneration cycle of molecular sieve can effectively save this part of energy and reduce the power consumption of air separation.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a device for determining the regeneration period of the air separation and purification system, which has the advantages of simple structure, reliable quality, low price, and simple method.

In order to achieve the above object, the technical scheme that the utility model takes is:

A device for determining the regeneration cycle of an air separation purification system, comprising a weight test sensor 8 fixed on a fixed foundation 2, a support platform 7 arranged on the weight test sensor 8, and a molecular sieve adsorber 1 fixed on the support platform 7; Both sides of the molecular sieve adsorber 1 are connected to a gas pipeline 4 through a connecting hose 5, and an inlet and outlet valve 3 is arranged on the gas pipeline 4.

It also includes a limiting device 6 fixed on the fixed foundation 2 for limiting the toppling, displacement and vibration of the molecular sieve adsorber 1 due to its internal gas flow and pressure changes.

The connecting hose 5 is a flexible hose, which connects the molecular sieve adsorber 1 and the gas pipeline 4 without force.

The device for determining the regeneration cycle of the air separation purification system determines the regeneration cycle method of the air separation purification system, the fixed base 2 is guaranteed to be in a static state, and the air containing moisture, carbon dioxide, and hydrocarbons passes through the molecular sieve adsorber 1- The gas pipeline 4 on the side and the connecting hose 5 enter the molecular sieve adsorber 1. After the molecular sieve adsorber 1 absorbs the moisture, carbon dioxide and hydrocarbons in the air, the weight of the molecular sieve adsorber 1 increases until the molecular sieve adsorber 1 is close to saturation. state, observe that the weight displayed by the weight test sensor 8 no longer changes to m+△m, time the adsorption time _T1 of the molecular sieve adsorber 1; 4 and connecting hose 5, pass high-temperature and low-temperature dirty nitrogen to the molecular sieve adsorber 1 in the opposite direction to remove moisture, carbon dioxide, and hydrocarbons in the molecular sieve adsorber 1, reduce the weight in the molecular sieve adsorber 1, and observe the weight test sensor When the weight shown in 8 returns to the state of the original weight m of the molecular sieve adsorber 1, the regeneration time _T2 of the molecular sieve adsorber 1 is obtained by timing; by measuring the weight change of the molecular sieve adsorber 1 in the adsorption process and the regeneration process, the molecular sieve For the adsorption time T ₁ of the adsorber 1 and the regeneration time T ₂ , a longer time is selected as the regeneration cycle of the purification system.

The device of the utility model accurately determines the regeneration cycle of the air separation and purification system by using the weighing method, and has the advantages of simple structure, reliable quality, low price, and simple method.

Description of drawings

Fig. 1 is a schematic diagram of the device of the present invention and determining the regeneration cycle of the air separation and purification system.

Fig. 2 is a schematic diagram of the working process of molecular sieve adsorption and regeneration in the utility model.

Detailed ways

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

As shown in Figure 1, a device for determining the regeneration period of an air separation purification system includes a molecular sieve adsorber 1, a fixed foundation 2, an inlet and outlet valve 3, a gas pipeline 4, a connecting hose 5, a limit device 6, a support Platform 7 and weight test sensor 8; Weight test sensor 8 is fixed on the fixed foundation 2, is used to measure the weight of molecular sieve adsorber 1; Fixed molecular sieve adsorber 1 above the described supporting platform 7, and is placed on the weight test sensor 8; The limiting device 6 is used to limit the toppling, displacement and vibration of the molecular sieve adsorber 1 due to the internal gas flow and pressure change. During the adsorption process, after the molecular sieve adsorber 1 absorbs water, carbon dioxide, and hydrocarbons in the air, the state changes from a dry state to a saturated state, and the weight increases from m to m+△m; during the regeneration process, the molecular sieve adsorber 1 The water, carbon dioxide, and hydrocarbons are taken away by the high-temperature polluted nitrogen and low-temperature polluted nitrogen in sequence, the state changes from a saturated state to a dry state, and the weight returns from m+△m to m. The time period during which the weight change of the molecular sieve adsorber is measured and recorded by the gravimetric sensor 8 determines the regeneration period of the purification system.

The working process of the purification system is shown in FIG. 2 . After the airflow filters through the filter 9 , the particulate impurities and liquid droplets are isolated, and then enter the air compressor 10 for pressurization. The pressurized air enters the water cooling tower 11 for cooling. Since the air at the outlet of the water cooling tower 11 contains water, carbon dioxide and hydrocarbons, these substances may cause blockage, rupture, or even explosion of the heat exchanger in the subsequent process of air separation, so they must be adsorbed clean.

In order to ensure the continuous operation of air separation, the purification system is generally composed of two molecular sieves, such as A and B in Figure 2, one for adsorption, one for regeneration, and exchanged periodically. If A is an adsorption process, the air at the outlet of the water cooling tower 11 enters the molecular sieve adsorber in A through gas pipelines, connecting hoses and valves, and then forms clean air for air separation. When the molecular sieve adsorber in A is close to saturation, the mass increases from m to m+△m. Record the time of adsorption as T ₁ ; B is the regeneration process. First, the molecular sieve adsorber in B is fed with high-temperature dirty nitrogen, and then the molecular sieve adsorber in B is fed with low-temperature dirty nitrogen. The molecular sieve adsorber in B is from a saturated state It turns into a dry state, the mass decreases from m+△m to m, and the time for record regeneration is T ₂ .

Compare the size of T ₁ and T ₂ , and choose the larger one as the regeneration period of the air separation molecular sieve. The method determines the regeneration cycle of the purification system by measuring the weight of the molecular sieve adsorber, and the method is more direct and the cycle time is more accurate.

The above is only a preferred implementation of the device, and does not limit the utility model in any form. Those skilled in the art make some simple and equivalent changes or modifications using the technical content disclosed above, all of which fall within the scope of the utility model. new type of protection.

Claims (3)

1. A device for determining the regeneration cycle of an air separation purification system, characterized in that: comprising a weight test sensor (8) fixed on a fixed foundation (2), a support platform (7) arranged on a weight test sensor (8) , the molecular sieve adsorber (1) fixed on the support platform (7); both sides of the molecular sieve adsorber (1) are connected with a gas pipeline (4) through a connecting hose (5), on the gas pipeline (4) An inlet and outlet valve (3) is provided. 2. The device for determining the regeneration period of the air separation and purification system according to claim 1, characterized in that: it also includes being fixed on the fixed foundation (2) for limiting the molecular sieve adsorber (1) due to its internal gas flow, pressure change The limiting device (6) for toppling, displacement and vibration caused. 3. The device for determining the regeneration cycle of the air separation and purification system according to claim 1, characterized in that: the connecting hose (5) is a flexible hose connecting the molecular sieve adsorber (1) and the gas pipeline (4), No force.