CN2668227Y - Amine liquid filter device - Google Patents

Abstract

The utility model belongs to the field of filtration equipment in petrochemical industry, particularly an amine liquid filter device. The device is composed of at least two filter systems in ensuring continuous production; the lower parts of the filters connected in parallel are connected with an input pipe of raw material media by a pipeline with an auto-valve, and are connected with a foul solution discharge pipe by a pipeline with an auto-valve; the upper parts of the filters are connected with a backwashing assistance gas input pipe by a pipeline with an auto-valve and are connected with a gas exhaust output pipe by a pipeline with an auto-valve. The utility model is characterized in that the filter core in a filter tank body is in reverse arrangement; a pipe sheet is arranged at the lower surface of the filter core; the side lower part of the tank body of the filter is connected with a cleansing medium output pipe by a pipeline with an auto-valve; the lower parts of the filters are connected with a fresh hot water input pipe by a pipeline with an auto-valve. Compared with the prior art, the utility model decreases foul solution discharge, reduces foul solution concentration, and has the advantages of low operation cost and low pollution degree.

Description

A kind of amine liquid filter device

Technical field

The utility model belongs to petrochemical industry filter plant field, particularly a kind of amine liquid filter device.

Technical background

In the prior art, in the production process of oil refining enterprise, crude oil is processed the operation that is absolutely necessary, and in the secondary processing process of sour crude oil, the suitable major part of sulfide changes into hydrogen sulfide in the crude oil.With such sulfurous gas as the petrochemical industry raw materials for production or when making fuel, can cause the corrosion of equipment and pipeline, make catalyst poisoning, contaminated environment is detrimental to health.In addition, the hydrogen sulfide in the gas also is the raw material of making sulphur and sulfuric acid.Thereby need be re-used as raw material or fuel that petrochemical industry is produced with after the hydrogen sulfide stripping in the refinery gas.The method of gas sweetening comprises dry desulfurization (solid absorbent) and wet desulphurization (liquid-absorbant), the general chemical absorption method that adopts in the refinery gas, promptly use the alkaline solution (monoethanolamine) that reacts with hydrogen sulfide to carry out chemical absorbing, basic species in the solution and hydrogen sulfide are at normal temperatures in conjunction with generating complex salt.Because the residual lubricating grease of equipment, gas carry the existence of hydro carbons lime set and gas mist, corrosion product etc., make alkanolamine solution produce " foaming " phenomenon, influence the normal operation of process of desulfurizing gases.The general methods such as defoamer, use separator or absorber that adopt alleviate foamed phenomenon, and in this technical process, the amine liquid filter is used widely.In order to make filter core reach effective regeneration, guarantee that filter core has serviceability steady in a long-term, in the prior art, generally adopt gas assist type back flush mode to be disposed to the soiling solution pond by the soiling solution feed-line with the appended filter cake removal of cartridge surface and with its soiling solution; Its purification medium outlet is positioned at top, filter canister side, and the filter core forward is placed.Its structural shape (comprises automatically shown in accompanying drawing one, semi-automatic and manual control), technology for 100% media filtration, the amine liquid filter of prior art is to be linked by the parallel connection of two (or many) filters, filter A and filter B bottom are respectively by automatic valve VA3, VB3 and backwash soiling solution feed-line f join, by automatic valve VA1, VB1 joins with raw material liq intake pipeline b respectively, automatic valve VA5 is passed through on top in filter A and filter B, VB5 and backwash assist gas pipeline d join, pass through VA4, VB4 and emission gases line c are joined, and the upper lateral part of filter A and filter B is by automatic valve VA2, VB2 and purification medium export pipeline a join.Two filters of prior art (A and B) are to adopt switching mode to use, and when filter A carries out filter operation, the filter B standby host is stand-by.When filter A operation pressure reduction reaches setting value, provide signal by control device and switch to filter B and carry out filter operation, and filter A using gases is carried out the back flush of gas assist type.The back flush of gas assist type is operating as: close inlet valve VA1, bleeder valve VA2 successively, filter canister teeming air valve VA5 opens earlier, the backwash assist gas in the injecting gas pipeline.The appended cake layer of filter core is loosening because backwash assist gas compression shock can be exercised earlier, and flushbottom tank valve VA3 opens then, makes backwash assist gas compressing pot liquid (soiling solution) and it is all drained into the soiling solution feed-line to enter the soiling solution pond.Filter A regeneration ending is standby.When filter B reaches setting pressure reduction, also carry out above-mentioned same backwash operation equally, filter A starts working simultaneously.Also can come into operation simultaneously by two (or many) filters, filtration system reaches when setting pressure reduction, successively filter is carried out the auxiliary backwash of gas.As previously mentioned, amine liquid is a kind of alkaline solution, and corrosivity is more intense, can not directly discharge, and the soiling solution that has the filter for installation discharging now must just can circulate in utilization through after annotating acid and other processing.Factory was used for the acid that soiling solution (amine liquid) handles in 1 year and wants the hundreds of ton, carried out this work and had not only increased operating cost, and the while is contaminated environment also, is detrimental to health.

The utility model content

The purpose of this utility model is to provide a kind of can reduce the soiling solution discharging, reduces the amine liquid filter device of soiling solution concentration, operating cost and pollution level.

According to above-mentioned purpose, solution of the present utility model is: in amine liquid filter, the filter core in the filter tank body is oppositely placed, the purification medium outlet is positioned at the side lower part of tank body, has increased fresh hot water displacement liquid pipe.

Concrete solution of the present utility model is:

The composition of this device is when guaranteeing to produce continuously, employing is no less than the system of two filters, be that filter A and filter B the latter two bottom in parallel joins by pipeline and the stock media input pipe b that automatic valve VA1, VB1 are housed, and join by pipeline and the soiling solution delivery pipe f that automatic valve VA3, VB3 are housed, the top of filter A, B joins by pipeline and the backwash assist gas input pipe d that automatic valve VA5, VB5 are housed, and joins by pipeline and the emission gases efferent duct c that automatic valve VA4, VB4 are housed; One of differential pressure transmitter PDT is installed between the pipeline of stock media input pipe b and purification medium efferent duct a, at filter A, the sidepiece of B tank body is installed LT of fluid level transmitter respectively, LTI, PDI is respectively control device, it is characterized in that filter A, filter core 1 in the B tank body is oppositely to place, tube sheet 2 place filter core 1 below, filter A, the side lower part of the tank body of B is by being equipped with automatic valve VA2, the pipeline of VB2 and purification medium efferent duct a join filter A, the bottom of B is by being equipped with automatic valve VA6, the pipeline of VB6 and fresh hot water input pipe e join.

Compared with prior art, the utility model amine liquid filter is when the filter core backwash and regeneration, filter core in the filter tank body is oppositely placed, the purification medium outlet is positioned at the side lower part of tank body, its characteristics are that the amine liquid medium that earlier major part has been purified drains into the purification medium export pipeline, and purifying back amine liquid medium can directly utilize again; Inject fresh water solution then, temperature 〉=amine the liquid temp of fresh water (≤95 ℃), after soaking certain hour, utilize the gas pressure blowback that the appended filter cake of filter core is drained into the soiling solution pipeline jointly, make the backwash better effects if of filter core like this, can wash totallyer, greatly reduce the alkali concn of discharging soiling solution simultaneously, be that the liquid medium major part that contains in the soiling solution is water, thereby bring convenience for the processing of soiling solution, acid solution is saved more than 80%, reduces operating cost and labour intensity, also greatly reduce the pollution problem that is brought in the soiling solution processing procedure, have good economic implications and environment protection significance.

Description of drawings

Accompanying drawing 1 is a prior art amine liquid filter apparatus configuration schematic diagram.

Accompanying drawing 2 is an amine liquid filter apparatus configuration schematic diagram of the present utility model.

In the above-mentioned accompanying drawing, A, B are respectively filter, and the direction of arrow is depicted as among the figure: a is the purification medium efferent duct, and b is the stock media input pipe, and c is the emission gases efferent duct, and d is a backwash assist gas input pipe, and e is the fresh water input pipe, and f is the soiling solution delivery pipe.VA1, VB1 are the automatic valve of stock media input, VA2, VB2 are the automatic valve of purification medium output, VA3, VB3 are the automatic valve of soiling solution discharging, VA4, VB4 are the automatic valve for emission gases output, VA5, VB5 are the automatic valve of backwash assist gas input, and VA6, VB6 are the automatic valve of fresh water input; V1 is system's bypass manual control valve, V2 is the manual control valve of stock media input pipe b, V3 is the manual control valve of purification medium efferent duct a, V4 is the manual control valve of backwash assist gas input pipe d, V5 is the manual automatic valve of emission gases efferent duct c, V6 is the manual control valve of fresh water input pipe e, and V0 is the check valve of backwash assist gas input pipe d, and PDT is a differential pressure transmitter; LT is a fluid level transmitter, and PDI, LTI are control device, and 1 is filter core, and 2 is tube sheet.

Concrete embodiment

Among Fig. 2, two filter A and B adopt switching mode to use, and when filter A carries out filter operation, the filter B standby host is stand-by.When filter A operation pressure reduction reaches setting value, provide signal by control device and switch to filter B and carry out filter operation, and filter A is carried out backwash operation.The step of back flush operation is: close and the automatic valve VA1 of stock media input pipe b to the pipeline between filter A bottom, open the automatic valve VA5 of backwash assist gas input pipe d to the pipeline between filter A top, inject backwash assist gas nitrogen or steam, open the automatic valve VA2 of filter A side lower part to the pipeline between purification medium efferent duct a, the amine liquid medium that has purified in the filter A is drained in the purification medium efferent duct a, when liquid level arrives the lower limit set value of liquid level gauge, close automatic valve VA2, VA5; Open the automatic valve VA6 of automatic valve VA4, the fresh water input pipe e of filter A top to the pipeline between emission gases efferent duct c to the pipeline between filter A bottom, fresh water is introduced filter A, when liquid level rises to upper limit set value, close automatic valve VA6, VA4; Open automatic valve VA5; Because it is loosening that backwash assist gas compression shock can be exercised the appended cake layer of filter core earlier, open the automatic valve VA3 of filter A bottom to the pipeline between soiling solution delivery pipe f then, make in the backwash assist gas compressing jar soiling solution and it is all drained among the soiling solution delivery pipe f.Filter A regeneration ending is standby.When filter B reaches setting pressure reduction, also carry out above-mentioned same backwash operation equally, filter A starts working simultaneously.Also can come into operation simultaneously by two (or many) filters, filtration system reaches when setting pressure reduction, successively filter is carried out as above backwash operation.

Claims (1)

1, a kind of amine liquid filter device, the composition of this device is when guaranteeing to produce continuously, employing is no less than the system of two filters, be that filter (A) and filter (B) the latter two bottom in parallel is by being equipped with automatic valve (VA1), (VB1) pipeline and stock media input pipe (b) join, and by automatic valve (VA3) is housed, (VB3) pipeline and soiling solution delivery pipe (f) join, filter (A), (B) top is by being equipped with automatic valve (VA5), (VB5) pipeline and backwash assist gas input pipe (d) join, and by automatic valve (VA4) is housed, (VB4) pipeline and emission gases efferent duct (c) join; Between the pipeline of stock media input pipe (b) and purification medium efferent duct (a), one of differential pressure transmitter (PDT) is installed in addition, at filter (A), (B) sidepiece of tank body is installed one of fluid level transmitter (LT) respectively, (LTI), (PDI) be respectively control device, it is characterized in that filter (A), (B) filter core (1) in the tank body is oppositely to place, tube sheet (2) place filter core (1) below, filter (A), the side lower part of tank body (B) is by being equipped with automatic valve (VA2), (VB2) pipeline and purification medium efferent duct (a) join, filter (A), (B) bottom is by being equipped with automatic valve (VA6), (VB6) pipeline and fresh hot water input pipe (e) join.