CN205867912U - Novel tail gas is retrieved device - Google Patents

Abstract

The utility model relates to a novel tail gas is retrieved device, advance the pipe including tail gas, tail gas advances the pipe and filters jar through the tube coupling, filters jar one end and passes through tube coupling adsorption equipment, and adsorption equipment is respectively through first knockout drum of tube coupling and second knockout drum, first knockout drum passes through pipeline run -on air traffic control and buffer tank respectively, the second knockout drum passes through the pipeline and connects flowing back pipe and compressor respectively, and the compressor passes through the tube coupling heat exchanger, and the heat exchanger passes through the tube coupling buffer tank, the buffer tank passes through tube coupling product recovery tube, the other end that filters the jar passes through tube coupling impurity discharge pipe, wherein the second knockout drum has the vacuum pump with adsorption equipment is middle through the tube coupling. The utility model discloses efficient, purifying effect is good, and is easy and simple to handle, and compact structure is reasonable, and disposable investment cost is low, and fail safe nature is high.

Description

A new exhaust gas recovery device

technical field

The utility model relates to a novel tail gas recovery device.

Background technique

Oil and gas recovery is an energy-saving and environmentally friendly high-tech. Oil and gas recovery technology is used to recover oil and gas discharged from oil products during storage, transportation, loading and unloading, to prevent air pollution caused by oil and gas volatilization, and to eliminate potential safety hazards. By improving the utilization rate of energy, reducing economic loss, thus obtaining considerable benefit return.

At present, the common methods include adsorption method, absorption method, condensation method and membrane separation method. The collected oil and gas are pumped to the oil tank by a vacuum pump or liquefied and separated by other methods. The adsorption method can achieve higher processing efficiency, but many oil and gas recovery devices are not ideal for high-pressure tail gas, so the current research and development of high-efficiency oil and gas recovery devices is of great importance. significance of energy saving and environmental protection.

Utility model content

The utility model provides a novel tail gas recovery device, which effectively solves the technical problem that the high-pressure tail gas is not easy to be adsorbed.

The technical scheme adopted in the utility model is:

A new type of exhaust gas recovery device, including an exhaust gas inlet pipe, the exhaust gas inlet pipe is connected to a filter tank through a pipeline, one end of the filter tank is connected to an adsorption device through a pipeline, and the adsorption device is respectively connected to a first separation tank and a second separation tank through a pipeline. The first separation tank is connected to the emptying pipe and the buffer tank through pipelines, the second separation tank is connected to the discharge pipe and the compressor through pipelines, the compressor is connected to the heat exchanger through pipelines, and the heat exchanger is connected to the heat exchanger through pipelines. The pipeline is connected to the buffer tank, the buffer tank is connected to the product recovery pipe through the pipeline, and the other end of the filter tank is connected to the impurity discharge pipe through the pipeline, wherein a vacuum pump is connected between the second separation tank and the adsorption device through the pipeline.

Preferably, valves are provided on the pipelines between the tail gas inlet pipe and the impurity discharge pipe and the filter tank, valves are provided on the pipelines between the first separation tank and the emptying pipe, and the second separation tank is connected to the exhaust pipe. The pipeline between the liquid pipes is provided with a valve, the pipeline between the buffer tank and the product recovery pipe is provided with a valve, and the adsorption device is respectively provided with a valve on the pipeline between the vacuum pump, the first separation tank and the filter tank. valve.

Preferably, the adsorption device includes 8 adsorbers, of which 4 adsorption towers are in the adsorption state, 1 adsorption tower is in the vacuum state, and the other 3 adsorption towers are in the depressurization or boosting state respectively.

Preferably, the eight adsorbers are connected in parallel through pipelines, and regulating valves are arranged on the pipelines at both ends of each adsorber.

Compared with prior art, advantage and positive effect of the present utility model are:

The utility model sets multiple adsorbers in an overlapping operation mode at intervals, which not only ensures the continuity of the treatment process but also effectively reduces the inlet flow rate; the adsorption tower of the utility model is reasonably stepped up and down, effectively solving the problem that the high-pressure tail gas is not easy to be adsorbed. Technical problems; the utility model has high efficiency, good purification effect, simple operation, compact and reasonable structure, low one-time investment cost, and high safety and reliability.

Description of drawings

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

Fig. 1 is the structural representation of the utility model.

In the figure, 1 is the tail gas inlet pipe, 2 is the filter tank, 3 is the impurity discharge pipe, 4 is the adsorption device, 5 is the first separation tank, 6 is the emptying pipe, 7 is the vacuum pump, 8 is the second separation tank, 9 10 is a compressor, 11 is a heat exchanger, 12 is a buffer tank or intermediate tank, and 13 is a product recovery pipe.

detailed description

Example

As shown in Figure 1, a novel tail gas recovery device comprises a tail gas inlet pipe (1), the tail gas inlet pipe (1) is connected to a filter tank (2) through a pipeline, and one end of the filter tank (2) is connected to an adsorption device ( 4), the adsorption device (4) is connected to the first separation tank (5) and the second separation tank (8) through pipelines respectively, and the first separation tank (5) is connected to the emptying pipe (6) and the second separation tank (8) through pipelines respectively. The buffer tank (12), the second separation tank (8) is connected to the liquid discharge pipe (9) and the compressor (10) through the pipeline respectively, and the compressor (10) is connected to the heat exchanger (11) through the pipeline, and the The heater (11) is connected to the buffer tank (12) through a pipeline, the buffer tank (12) is connected to the product recovery pipe (13) through a pipeline, and the other end of the filter tank (2) is connected to the impurity discharge pipe through a pipeline (3), wherein a vacuum pump (7) is connected between the second separation tank (8) and the adsorption device (4) through a pipeline.

The tail gas inlet pipe (1), the impurity discharge pipe (3) and the filter tank (2) are respectively provided with valves on the pipeline, and the pipeline between the first separation tank (5) and the emptying pipe (6) A valve is provided, a valve is provided on the pipeline between the second separation tank (8) and the drain pipe (9), and a valve is provided on the pipeline between the buffer tank (12) and the product recovery pipe (13). Valves, the pipelines between the adsorption device (4) and the vacuum pump (7), the first separation tank (5) and the filter tank (2) are respectively provided with valves.

The adsorption device (4) comprises 8 adsorbers, wherein 4 adsorption towers are in the adsorption state, 1 adsorption tower is in the vacuum state, and the other 3 adsorption towers are in the state of step-down or boost respectively, and the 8 adsorption towers The adsorbers are connected in parallel through pipelines, and regulating valves are installed on the pipelines at both ends of each adsorber.

Utilize the utility model to carry out the process that tail gas is recovered and processed as follows:

The exhaust gas first enters the filter (2) of the system through the inlet of the exhaust gas inlet pipe (1) to filter out impurities such as other particles, and then undergoes depressurization treatment through the regulating valve. The depressurized exhaust gas enters the adsorption device (4) and is absorbed Carbon fiber adsorption, the adsorption device (4) has 8 adsorbers in total, 4 adsorbers are in the adsorption state at the same time, 1 adsorber is in the vacuum state, and the other 3 adsorbers are in the state of step-down or step-up respectively. Among them, The adsorption progress of the four adsorbers in the adsorption state differs by 80 seconds.

When a certain unit (such as 1#) in the adsorber is saturated, the pressure is reduced in the forward direction first, and the gas such as N2 in the adsorber is discharged to increase the concentration of hydrocarbons. After the 1# adsorber is decompressed in parallel, there is still high-pressure gas in the tower, and the high-pressure gas after being placed in parallel is put into the adsorber (such as 6#) after vacuuming. After the depressurization is completed, there is still gas higher than normal pressure in the 1# adsorber, and the gas is emptied, and the second separation tank (8) is finally cooled and recovered through the heat exchanger (11). After the 6# venting process is completed, the vacuum pump (7) vacuumizes the adsorption device to desorb the hydrocarbons adsorbed in the adsorbent. After vacuuming, the 6# adsorber is in a negative pressure state, and the inter-tower pressure needs to be increased. This process is carried out simultaneously with the depressurization of the 1# device, and finally the pressure of the 6# adsorber is raised to the adsorption pressure. The hydrocarbons extracted during the regeneration process are firstly separated by a primary gas-liquid separator, then pressurized to 0.5MPa by the compressor (10), and then cooled to about 25° by the heat exchanger (11). Hydrocarbons and water are condensed into liquid, and after standing for stratification, the product is recycled through the outlet of the product recovery pipe (13).

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. All the implementation manners cannot be exhaustively listed here. All obvious changes or variations derived from the technical solutions of the utility model are still within the scope of protection of the utility model.

Claims (4)

1. a New Tail gas recovering device, including tail gas inlet pipe, is characterized in that: tail gas inlet pipe connects filtering tank by pipeline, Filtering tank one end connects adsorbent equipment by pipeline, and adsorbent equipment connects the first knockout drum and second by pipeline respectively and separates Tank, described first knockout drum connects evacuated tube and surge tank respectively by pipeline, and described second knockout drum is connected respectively by pipeline Connecing discharging tube and compressor, compressor connects heat exchanger by pipeline, and heat exchanger connects surge tank, described surge tank by pipeline By pipeline connect Product recycling pipe, the other end of described filtering tank by pipeline connect impurity exhaust conduit, wherein said second Knockout drum has vacuum pump with being connected by pipeline in the middle of adsorbent equipment.

New Tail gas recovering device the most according to claim 1, it is characterised in that: described tail gas inlet pipe, impurity exhaust conduit It is provided with valve with on the pipeline of filtering tank respectively, the pipeline between described first knockout drum and evacuated tube is provided with valve, Valve, the pipeline between described surge tank and Product recycling pipe it is provided with on pipeline between described second knockout drum and discharging tube On be provided with valve, described adsorbent equipment is provided with valve on the pipeline respectively and between vacuum pump, the first knockout drum, filtering tank Door.

New Tail gas recovering device the most according to claim 1 and 2, it is characterised in that: described adsorbent equipment includes 8 suctions Adnexa, wherein 4 adsorption towers are in adsorbed state, and 1 adsorption tower is in evacuation state, and other 3 adsorption towers are respectively at The state of buck or boost.

New Tail gas recovering device the most according to claim 3, it is characterised in that: described 8 adsorbers are by pipeline also Connection, the pipeline at every adsorber two ends is provided with regulation valve.