CN207478318U

CN207478318U - A kind of claus tail-gas clean-up device

Info

Publication number: CN207478318U
Application number: CN201721394233.XU
Authority: CN
Inventors: 陈铁; 赵国德; 张兴
Original assignee: Zhejiang Meifu Petrochemical LLC
Current assignee: Zhejiang Meifu Petrochemical LLC
Priority date: 2017-10-26
Filing date: 2017-10-26
Publication date: 2018-06-12
Anticipated expiration: 2027-10-26

Abstract

A kind of claus tail-gas clean-up device, including pretreatment unit and master device, pretreatment unit includes cooling tower, tubular filter tower and condenser, first leakage fluid dram of the cooling tower is connected with the first inlet of the tubular filter tower, second leakage fluid dram of the tubular filter tower is connected with the second inlet of the condenser, the outlet of the condenser is connected with the third inlet of the cooling tower, and master device includes SO₂Absorption plant and Complexing Iron self-loopa desulfurizer, the SO₂Absorption plant is connected by air inlet pipe with tail gas, the SO₂The connection that absorption plant passes through downtake pipe and Complexing Iron self-loopa desulfurizer, pass through the setting of twice program, it is achieved thereby that the purification of Claus tail gases, the technique than traditional SCOT adds hydrogen tail gas treatment process, and low energy consumption, and the renewable recycling of Complexing Iron medicament of desulfurization absorbent, Complexing Iron self-loopa desulfurizer used.

Description

A kind of claus tail-gas clean-up device

Technical field

The utility model is related to a kind of exhaust gas processing device, especially a kind of claus tail-gas clean-up device.

Background technology

Claus method is current refinery gas, natural gas processing by-product sour gas and other containing H₂S gases recycle the master of sulphur Method is wanted, cardinal principle is：Contain H₂The sour gas of S burns after being mixed with air in combustion furnace, generating portion SO₂, and make stove H in thorax₂S and SO₂Volume ratio be 2：1, make about 50%, 70% H₂S and SO₂Claus reaction occurs in stove,

Due to being limited by chemical balance, the conventional Claus technique sulfur recovery rate of two-stage catalysis forwarding is this method 90-95%, three-level conversion ratio also can only achieve 95%-98%, if without subsequent exhaust treatment system, it is impossible to meet SO₂Row The national standard put.

To solve the problems, such as claus process exhaust emissions, develop in the world and realized that industrialized technique there are tens of kinds, Such as tail gas reduction-absorption process, low-temperature Claus technique, direct oxidation of hydrogen sulfide technique.Be most widely used at present is this Section's spy's (SCOT) technique, the technique belong to one kind of tail gas reduction-absorption process.The basic principle of SCOT techniques is using specific Catalyst is by the SO in conventional Claus technique tail gas₂, organic sulfur, all sulfide such as elemental sulfur, converted by hydrogenating reduction For H₂After S, with ammonia desulfuration solution absorption process by H₂S concentrates, then the H by concentrate₂S is turned again back to Cross unit Change is handled, and hydrogen sulfide content is relatively low in tail gas so after treatment, can directly burn and be discharged into air.However SCOT The intake air temperature of technique reduction reactor must reach 280-300 DEG C, to realize all sulfide to H₂The conversion of S.Due to refining The heating condition that oily factory and natural gas processing plant have can not heat the gases to temperature high in this way, add hydrogen under normal conditions Heat source needed for reduction reactor and hydrogen source need to reach such temperature levels using online burner, thus can cause to operate Complex process and operating cost increase, therefore the investment of the device is higher.

Utility model content

The purpose of this utility model is to provide a kind of claus tail-gas clean-up devices easy to operate, efficient.

In order to solve the above technical problems, the utility model provides a kind of claus tail-gas clean-up device, filled including pretreatment Put and master device, pretreatment unit includes cooling tower, tubular filter tower and condenser, the first leakage fluid dram of the cooling tower with First inlet of the tubular filter tower is connected, the second leakage fluid dram of the tubular filter tower and the second of the condenser into Liquid mouth is connected, and the outlet of the condenser is connected with the third inlet of the cooling tower, and master device includes SO₂Absorption plant With Complexing Iron self-loopa desulfurizer, the SO₂Absorption plant is connected by air inlet pipe with tail gas, the SO₂It is filled in absorption plant There are desulfurization absorbent, the SO₂Absorption plant passes through the connection of downtake pipe and Complexing Iron self-loopa desulfurizer, the network It closes and Complexing Iron medicament is housed in iron self-loopa desulfurizer.

The utility model improvement has, and further includes medicament regenerating unit, the top of the medicament regenerating unit passes through inlet tube With the SO₂The bottom connection of absorption plant, the bottom of the medicament regenerating unit is by returning liquid pipe and the SO₂Absorption plant Top connection, the upper end of the medicament regenerating unit is connected with second exhaust pipe.

The utility model improvement has, and head cover is equipped at the top of the cooling tower, exhaust outlet, institute are provided on the head cover The bottom for stating cooling tower is provided with the first leakage fluid dram, and the side of the cooling tower is provided with third inlet and air inlet, described Third inlet is connected by pipeline with spray thrower, and the spray thrower is fixed below the spray thrower inside the cooling tower There is hollow out baffle, Nitinol Raschig ring be placed on the hollow out baffle, aeration board is installed below the hollow out baffle, The aeration board is connected with the air inlet by pipeline, and waveform blade demister, the wave are equipped with above the spray thrower Mesh mist eliminator is installed above shape blade demister.

The utility model improvement has, the SO₂Absorption plant uses SO₂Absorption tower, the medicament regenerating unit is using regeneration Tower, the air inlet pipe and SO₂The lower part connection on absorption tower, the SO₂The upper end on absorption tower by the downtake pipe with it is described Complexing Iron self-loopa desulfurizer connects, and the top of the regenerator passes through the inlet tube and SO₂The lower end connection on absorption tower, The lower end of the regenerator is by returning liquid pipe and SO₂The top connection on absorption tower, the upper end of the regenerator are connected with described the Two exhaust pipes.

The utility model improvement has, and the tubular filter tower is Double-Tower Structure, and described two filtration tanks pass through described first Inlet is connected with second leakage fluid dram, and the bottom of the tubular filter tower is equipped with filtering tower chassis, first feed liquor Mouth is connect with the filtering tower chassis, and the top of the tubular filter tower side is equipped with the second leakage fluid dram, the tubular filter Baffle is welded in tower, tubular filter is fixed on the baffle.

The beneficial effects of the utility model are：The claus tail-gas clean-up device of new structure, passes through setting for twice program It puts, it is achieved thereby that the purification of Claus tail gases, which than traditional SCOT adds hydrogen tail gas treatment process, and low energy consumption, and uses Desulfurization absorbent, Complexing Iron self-loopa desulfurizer the renewable recycling of Complexing Iron medicament, reduce disappearing for medicament Consumption has saved financial cost；The utility model claus tail-gas clean-up apparatus structure is simple.

Description of the drawings

Structure diagram of the attached drawing 1 for a kind of claus tail-gas clean-up device of the utility model；

Label declaration：1- cooling towers；2- filtration tanks；3- condensers；The first leakage fluid drams of 4-；The second leakage fluid drams of 5-；6- thirds Leakage fluid dram；7-SO₂Absorption plant；8- Complexing Iron self-loopa desulfurizers；9- air outlet pipes；10- downtake pipes.

Specific embodiment

For the technology contents of the utility model, construction feature, the objects and the effects are described in detail, below in conjunction with implementation Mode simultaneously coordinates attached drawing to be explained in detail.

With reference to attached drawing 1, the utility model provides a kind of claus tail-gas clean-up device, including pretreatment unit and main dress It puts, pretreatment unit includes cooling tower 1, tubular filter tower 2 and condenser 3, the first leakage fluid dram 4 of the cooling tower 1 and institute The first inlet for stating tubular filter tower 2 is connected, the second leakage fluid dram 5 and the second of the condenser 3 of the tubular filter tower 2 Inlet is connected, and the outlet of the condenser 3 is connected with the third inlet 6 of the cooling tower 1, and master device includes SO₂It inhales Receiving apparatus 7 and Complexing Iron self-loopa desulfurizer 8, the SO₂Absorption plant 7 is connected by air inlet pipe and the air outlet pipe of cooling tower 9 It is logical, the SO₂Equipped with desulfurization absorbent, the SO in absorption plant 7₂Absorption plant 7 by downtake pipe 10 and Complexing Iron from The connection of circulation desulfurizing device 8 is equipped with Complexing Iron medicament in the Complexing Iron self-loopa desulfurizer 8.

Specifically, the SO₂The lower part on absorption tower passes through air inlet pipe and tail gas unicom, the SO₂It is equipped in absorption plant 7 Desulfurization absorbent, desulfurization absorbent use ion liquid reclaiming agent, and Complexing Iron self-loopa desulfurizer 8 is a tank body, the inside Equipped with Complexing Iron medicament.The lower part of tank body is small top and big bottom cone, and the bottom of lower end, that is, cone of tank body, which is equipped with, slags tap Mouthful, SO₂The upper end on absorption tower is connected by downtake pipe 10 with tank body.

Head cover at the top of the cooling tower is installed, exhaust outlet is provided on the head cover, the bottom of the cooling tower is set The first leakage fluid dram is equipped with, the side of the cooling tower is provided with third inlet and air inlet, and the third inlet passes through pipe Road is connected with spray thrower, and the spray thrower is fixed with hollow out baffle inside the cooling tower below the spray thrower, described to engrave Nitinol Raschig ring is placed on neutral gear plate, aeration board is installed below the hollow out baffle, the aeration board with it is described Air inlet is connected by pipeline, and waveform blade demister, the waveform blade demister top are equipped with above the spray thrower Mesh mist eliminator is installed.

The SO₂Absorption plant uses SO₂Absorption tower, the medicament regenerating unit use regenerator, the air inlet pipe with SO₂The lower part connection on absorption tower, the SO₂The upper end on absorption tower is taken off by the downtake pipe and the Complexing Iron self-loopa Sulphur device connects, and the top of the regenerator passes through the inlet tube and SO₂The lower end on absorption tower connects, under the regenerator End is by returning liquid pipe and SO₂The top connection on absorption tower, the upper end of the regenerator is connected with the second exhaust pipe.

Absorb SO₂Ion liquid reclaiming agent again by inlet tube be sent into regenerator in, by heating 100-120 DEG C Afterwards, SO₂Gas is escaped by second exhaust pipe from the top of regenerator, the SO of effusion₂Gas gas-liquid point after cooling down 60-80 DEG C From obtaining pure SO₂Byproduct, for relieving haperacidity, the ion liquid reclaiming agent for regenerating completion returns SO again by returning liquid pipe₂ It is used in absorption tower.

In pretreatment unit, the height of cooling tower 1 is 1100mm, a diameter of 550mm.

Tubular filter tower 2 is Double-Tower Structure, and the height of tubular filter tower 2 is 1200mm, blade diameter length ratio 1：6.Two mistakes Filter tower is connected by the first inlet and the second leakage fluid dram 5.The bottom of tubular filter tower 2 is connected by flange and filtering tower chassis It connects.First inlet is connect with filtering tower chassis, and the first inlet is in the center of filtering tower chassis.First leakage fluid dram, 4 He The top that 2 side of filtering infusion pump and the first valve tubular type filtration tank is equipped between first inlet is equipped with the second leakage fluid dram 5.Two triangular baffles are welded in tubular filter tower 2, baffle at from tower body bottom 100mm, two triangular baffles Position height is contour, the line of two triangle plate washers, and the central axes tubular filter of tubular filter tower 2 is high score by material excessively The stent of sub- polymer is fixed on baffle.Tubular filter is overlapped with the center line of tubular filter tower 2.The height of tubular filter It spends for 700mm, blade diameter length ratio 1：6.

During operation, pre-processed first, by Claus tail gases coolant through infusion pump from the third on 1 top of cooling tower into The dispersion of liquid mouth 6 is sprayed into cooling tower 1, by high temperature and humidity Claus tail gases from the air inlet of 1 bottom of cooling tower, pass through aeration board Dispersion is sprayed into cooling tower 1, and the Claus tail gases cooling absorbing liquid being dispersed into cooling tower 1 by spray thrower is aerated with passing through The high temperature and humidity Claus tail gases that plate enters cooling tower 1 come into full contact in Nitinol Raschig ring filler layer, generate heat exchange；

Claus tail gases after cooling are reacted respectively by waveform blade demister by Nitinol Raschig ring filler layer, After mesh mist eliminator, cooling tower 1 is discharged from exhaust outlet, flows through Nitinol Raschig ring filler layer and high temperature and humidity Claus tail gases Cooling absorbing liquid after haptoreaction flows to 1 bottom of cooling tower, is stored in bottom of towe, by observation panel, makes 1 bottom of towe of cooling tower Coolant height is 200mm, and excessive cooling absorbing liquid discharges cooling tower 1 by the first leakage fluid dram 4；

The liquid cooled heat of crossing of discharge cooling tower 1 enters tubular filter tower 2 by filtration cycle pump from the first inlet of filtering , when liquid cooled heat flows through tubular filter excessively, contained solid impurity is filtered, and filtrate passes through the second leakage fluid dram 5 and discharges tubular type mistake Filter tower 2, solid impurity in tubular filter take out tubular filter, carry out clear by dismantling the head cover of tubular filter tower 2 Reason.

Coolant after filtering enters condenser 3 from the second inlet, after heat exchange, reduces temperature, after cooling Coolant is under the action of infusion pump, from outlet eductor condenser 3.Coolant after cooling under the action of infusion pump from into Enter cooling tower 1, by above-mentioned steps, recycle.H in Claus tail gases₂A concentration of 600mg/m of S³, temperature is 200 DEG C； The intake velocity of Crouse's sulfur-containing tail gas is 5m³/h.The feed speed of Claus tail gases cooling absorbing liquid is 2.3m³/ h, feed liquor Pressure is 0.1MPa.

The tail gas discharged from exhaust outlet is passed through SO by air inlet pipe again₂In absorption tower, SO is utilized₂Desulfurization absorbs in absorption tower Agent absorbs SO₂, desulfurization absorbent is the ionic liquid absorbent with amino-functionalization, this embodiment uses ionic liquid desulfurization Agent.

SO will be stripped of₂Tail gas be passed into Complexing Iron self-loopa desulfurizer 8 by downtake pipe 10, pass through network Complexing Iron medicament in iron self-loopa desulfurizer 8 is closed by H in tail gas₂After S is oxidized to elemental sulfur, solid sulfur passes through slag notch Discharge, absorbs SO₂Ion liquid reclaiming agent again by inlet tube be sent into regenerator in, after heating 100-120 DEG C, SO₂Gas is escaped by second exhaust pipe from the top of regenerator, the SO of effusion₂Gas gas-liquid separation after cooling down 60-80 DEG C, Obtain pure SO₂Byproduct, for relieving haperacidity, the ion liquid reclaiming agent for regenerating completion returns SO again by returning liquid pipe₂It inhales It receives and is used in tower.

By the setting of twice program, it is achieved thereby that the purification of Claus tail gases, which adds hydrogen than traditional SCOT Low energy consumption for tail gas treatment process, and the desulfurization absorbent, the Complexing Iron medicament of Complexing Iron self-loopa desulfurizer 8 that use can be again It is raw to recycle, the consumption of medicament is reduced, has saved financial cost；The utility model claus tail-gas clean-up apparatus structure Simply.

The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly used in Other related technical areas are equally included in the patent within the scope of the utility model.

Claims

1. a kind of claus tail-gas clean-up device, which is characterized in that the claus tail-gas clean-up device include pretreatment unit and Master device, pretreatment unit include cooling tower, tubular filter tower and condenser, the first leakage fluid dram of the cooling tower with it is described First inlet of tubular filter tower is connected, the second leakage fluid dram of the tubular filter tower and the second inlet of the condenser It is connected, the outlet of the condenser is connected with the third inlet of the cooling tower, and master device includes SO₂Absorption plant and network Close iron self-loopa desulfurizer, the SO₂Absorption plant is connected by air inlet pipe with tail gas, the SO₂Equipped with de- in absorption plant Sulfur absorbing agent, the SO₂Absorption plant passes through the connection of downtake pipe and Complexing Iron self-loopa desulfurizer, the Complexing Iron Complexing Iron medicament is housed in self-loopa desulfurizer.

2. claus tail-gas clean-up device as described in claim 1, which is characterized in that the claus tail-gas clean-up device also wraps Medicament regenerating unit is included, the top of the medicament regenerating unit passes through inlet tube and the SO₂The bottom connection of absorption plant, institute The bottom of medicament regenerating unit is stated by returning liquid pipe and the SO₂The top connection of absorption plant, the medicament regenerating unit Upper end is connected with second exhaust pipe.

3. claus tail-gas clean-up device according to claim 1, which is characterized in that be equipped at the top of the cooling tower Head cover is provided with exhaust outlet on the head cover, and the bottom of the cooling tower is provided with the first leakage fluid dram, the side of the cooling tower Third inlet and air inlet are provided with, the third inlet is connected by pipeline with spray thrower, and the spray thrower is described Inside cooling tower, hollow out baffle is fixed with below the spray thrower, Nitinol Raschig ring, institute are placed on the hollow out baffle It states and aeration board is installed below hollow out baffle, the aeration board is connected with the air inlet by pipeline, on the spray thrower Side is equipped with waveform blade demister, and mesh mist eliminator is equipped with above the waveform blade demister.

4. claus tail-gas clean-up device as claimed in claim 2, which is characterized in that the SO₂Absorption plant uses SO₂It inhales Tower is received, the medicament regenerating unit uses regenerator, the air inlet pipe and SO₂The lower part connection on absorption tower, the SO₂Absorption tower Upper end connected by the downtake pipe with the Complexing Iron self-loopa desulfurizer, the top of the regenerator passes through institute State inlet tube and SO₂The lower end connection on absorption tower, the lower end of the regenerator is by returning liquid pipe and SO₂The top connection on absorption tower, The upper end of the regenerator is connected with the second exhaust pipe.

5. claus tail-gas clean-up device as described in claim 1, which is characterized in that the tubular filter tower is double tower knot Structure, described two filtration tanks are connected by first inlet with second leakage fluid dram, the bottom of the tubular filter tower Filtering tower chassis is installed, first inlet is connect with the filtering tower chassis, the top of the tubular filter tower side Second leakage fluid dram is installed, baffle is welded in the tubular filter tower, tubular filter is fixed on the baffle.