CN201324564Y - On-line washing high-efficiency filtering device - Google Patents

Abstract

The utility model relates to an on-line washing high-efficiency filtering device used for removing and separating liquid from gas in petroleum and chemical production. A shell body of the filtering device is divided into three spaces, i.e. a liquid storing room C, an absorption room B and a separation room A; an anti-vortex board, a liquid outlet, a dirt outlet and a liquid-dropping guide tube are arranged in the liquid storing room C; an air preprocessing unit, an air redistributing unit and a film filtering unit are arranged in a high-efficiency separation room; and a mechanical separation unit is arranged in a switching separation room. When in working, mixed gas coming from a front working segment enters the high-efficiency separation room, clean gas is discharged from an air outlet after being separated by the film filtering unit, and the separated liquid is discharged from the liquid outlet; if a filter element is blocked due to much too solid particles are mixed in the gas, the differential pressure can be increased; by the switching of an air inlet, the gas is separated by the switching separation room and is discharged from the outlet; low pressure is switched in the gas at the liquid outlet by the switching of a valve, and then the on-line back washing is carried out on the high-efficiency separation room by utilizing the instant differential pressure, so as to ensure the long-term safe running of equipment.

Description

On-line cleaning high efficiency filter device

Technical field

The utility model belongs to the separator technical field, relate to a kind of gas that in oil and chemical industry production process, is used for and remove the filter that liquid separates, particularly a kind of in the synthetic tower methanol plant, be used for reducing into the tower methanol content also can solve the filter that the wax deposition blockage problem appears in methanol production process.

Background technology

Present stage, the methanol content of synthetic tower outlet was about 6% under the normal condition in the synthetic tower methanol plant, and the methanol content of synthetic tower wherein has 5% the separated device separation of methyl alcohol recovery about 1%, and 1% methyl alcohol then circulates in synthesis system.Multiple side reaction also can take place after entering synthetic tower in cyclic part methyl alcohol under high temperature, high pressure, cause system's wax deposition, causes combined coefficient to reduce; Because catalyst fines that exists in the system and corrosion thing etc. all are blocked down at the efficient separating part of separator, also cause filter core to stop up in addition, system's pressure reduction is increased.The way of the filter core of this area solution at present blockage problem mainly is to add a by-pass in system, when increasing, system's pressure reduction switches to by-pass work, the cleaning separation equipment, but because synthetic at that time methyl alcohol is brought into synthetic tower from by-pass, aggravated to go into tower methanol content height so again to a great extent, side reaction is violent, and the wax deposition phenomenon is serious, system energy consumption is high and influence problems such as catalyst life.

The utility model content

The purpose of this utility model is the problem that prior art exists is solved, so provide that a kind of project organization is reasonable, easy to operate, good energy-conserving effect, can be under dead ship condition not to filter core and device interior is cleared up and can guarantee the on-line cleaning high efficiency filter device that system's combined coefficient is high.

The technical solution that adopts is so for achieving the above object: the on-line cleaning high efficiency filter device that is provided has one and has the wall side-inlet, the upright hollow housing of gas outlet, upper end and bottom blow-down mouth and leakage fluid dram, by gas distribution plate and the porous barrier that crosses at lower housing portion and top respectively housing is divided into fluid reservoir from bottom to top successively, three space segments in efficient separation chamber and switching separation chamber, wherein, the bottom of fluid reservoir has been horizontally set with an anti-vortex board, and connecting gas distribution plate and anti-vortex board straight cutting in the fluid reservoir both sides has two to fall the liquid mozzle; Upwards be provided with the gas pretreatment unit that forms by gas distribution plate stream successively in bottom, efficient separation chamber and by the gas that the blade group the constitutes unit of reallocating, be provided with the membrane filter unit that constitutes by many gas filter cores on efficient top, separation chamber; Internal upper part is provided with the mechanical separative element that is made of the taper silk screen in the switching separation chamber, is provided with standby air inlet on the sidewall that switches the separation chamber.In the course of work, mist from preceding workshop section (synthetic tower outlet or methanol separator outlet) enters efficient separation chamber by former air inlet, evenly entering membrane filter unit by the blade group after preliminary treatment in efficient separation chamber filters, continue by after separating once more through the gas that membrane filter unit separated, clean gas is discharged from the gas outlet of housing upper end, isolated liquid then along the fluid reservoir that falls liquid mozzle bleeder bottom, is discharged by the housing bottom leakage fluid dram again; If the entrained solid particle stops up filter core too much and causes system's pressure reduction increase in the gas, air inlet can be switched to standby air inlet, allow gas directly discharge by the taper silk screen separation of switching separation chamber and from outlet, after opening leakage fluid dram simultaneously and having arranged the liquid that branch gets off, utilizing external valve to switch closes towards the fluid reservoir valve, open the valve that leads to the off-gas pipeline, utilize instantaneous pressure reduction that efficient separation chamber is carried out online anti-cleaning, guarantee the safe operation of equipment long period.

Compared with prior art, on-line cleaning high efficiency filter device described in the utility model has the filtering accuracy height, removes effective, the advantages such as the investment maintenance cost is low, switching cleaning operation convenience, energy efficient of entrained liquids in the gas in chemical industry and petroleum industry practical application, do not changing other condition and do not increasing under the situation of equipment and can reduce production costs greatly, optimize the technological process of complete equipment, and long service life, stable performance, applicability are strong, prolonged the production cycle of equipment, can satisfy fully and produce actual needs.

Description of drawings

Accompanying drawing is the structural representation of a specific embodiment of the utility model.

The specific embodiment

Referring to accompanying drawing, on-line cleaning high efficiency filter device described in the utility model is included in fluid reservoir C, the efficient B of separation chamber that is separated out by gas distribution plate 5 and porous barrier 12 in the housing and switches the A of separation chamber three part working cells.Wherein the bottom of fluid reservoir C has been horizontally set with anti-vortex board 2, be used for stoping because of gas cyclone produces the bubble end and the falsity water level phenomenon occurs, be provided with in fluid reservoir C both sides and fall liquid mozzle 3, falling liquid mozzle 3 directly extends in the fluid reservoir C from the efficient B of separation chamber, in fluid reservoir C, also be provided with sewage draining exit 1, leakage fluid dram 14, capacitance level gauge and magnetic turnover panel liquid level gauge, leakage fluid dram 14 usefulness pipelines insert the atmospheric pipe of speeding, with valve control (this valve closing in the work), can make the interior liquid of device regularly obtain discharging in time.B bottom, efficient separation chamber is provided with gas pretreatment unit that is formed by gas distribution plate 5 baffles and the gas reallocation unit that is made of blade group 4, gas filter core 7 is fixed on below the porous barrier 12 by base, constitute the membrane filter unit in the efficient B of separation chamber, the membrane filter unit separation accuracy is higher, the clean solid particle that the liquid that enters and front pretreatment unit can be untreated is all tackled, and make it under the gravity effect, to be settled down to fluid reservoir C through falling liquid mozzle 3, the gas that assurance enters separative element again is very clean.On the efficient B of separation chamber sidewall, be provided with air inlet 6 and manhole 13.Switch the topmost that the A of separation chamber is positioned at housing, be provided with the mechanical separative element that constitutes by taper silk screen 9 on switching A top, separation chamber, it mainly acts on is the switching that utilizes between former air inlet 6 and standby air inlet 8 valves, change the gas trend, switch back gas and walk to switch the A of separation chamber, big liquid state is separated with solid particle, walk by-pass than original gas and bring the liquid parts and the solid content of synthetic tower into and significantly reduce.On switching the A of separation chamber, be provided with gas outlet 10.Label 11 is standby mouthful in the accompanying drawing, uses when maintenance process carries out steam blowback and nitrogen replacement.

Claims (3)

1, a kind of on-line cleaning high efficiency filter device, has a band wall side-inlet (6), the upright hollow housing of gas outlet (10), upper end and bottom blow-down mouth (1) and leakage fluid dram (14), it is characterized in that housing being divided into fluid reservoir (C) from bottom to top successively by the gas distribution plate (5) and the porous barrier (12) that cross at lower housing portion and top respectively, three space segments in efficient separation chamber (B) and switching separation chamber (A), wherein, the bottom of fluid reservoir (C) has been horizontally set with an anti-vortex board (2), and connecting gas distribution plate (5) and anti-vortex board (2) straight cutting in fluid reservoir (C) both sides has two to fall liquid mozzle (3); Upwards be provided with gas pretreatment unit that forms by gas distribution plate (5) baffle and the gas reallocation unit that constitutes by blade group (4) in bottom, efficient separation chamber (B) successively, be provided with membrane filter unit on top, efficient separation chamber (B) by many gas filter cores (7) formation; Internal upper part is provided with the mechanical separative element that is made of taper silk screen (9) in switching separation chamber (A), is provided with standby air inlet (8) on the sidewall that switches separation chamber (A).

2, on-line cleaning high efficiency filter device according to claim 1 is characterized in that gas filter core (7) is fixed on below the porous barrier (12) by base.

3, on-line cleaning high efficiency filter device according to claim 1 is characterized in that being provided with manhole (13) on efficient separation chamber (B) sidewall, is provided with standby mouthful (11) on switching top, separation chamber (A).

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