CN207294692U - A kind of device of wood tar hydrogenation joint substep dehydration - Google Patents

Abstract

The utility model discloses the device that a kind of wood tar is hydrogenated with joint substep dehydration, from wood tar raw material dehydration device successively pipeline connection BDO hydrogenation deoxidations reactor, BDO cold high pressure separators, BDO cold lows separator, OTM hydrocracking reactors, OTM cold high pressure separators, OTM cold lows separator, COU bio oils fractionating column and product oil deep dehydration device；Deep dehydration unit is equipped with the wood tar raw material dehydration device, the deep dehydration unit is nona modified fiber modularization dehydrator, according to flow direction, fluid rectification distributor, X-type cohesive fiber module are set gradually in the nona modified fiber modularization dehydrator, strengthens settling module, Ω moldeed depth degree separation fibre module；Wherein in X-type cohesive fiber module, lipophilic-hydrophobic property fiber and hydrophilic and oleophobic property fiber angle are 25~45 °.

Description

A kind of device of wood tar hydrogenation joint substep dehydration

Technical field

The utility model belongs to the field of bio-crude oil Hydrogenation petrol and diesel oil device oil dehydrating, and in particular to a kind of wood is burnt The device of oil hydrogenation Joint Distribution dehydration, specifically, to the raw material of wood tar hydrogenation combined unit, intermediate product, final production Product carry out deep dehydration processing, realize the low energy consumption of wood tar hydrogenation combined unit, the target of stable operation.

Background technology

The energy is the important substance basis for maintaining the mankind to stablize existence and long-run development, non-renewable fossil energy with A large amount of exploitations of the mankind use, and will inevitably welcome the day of exhaustion.Constantly reducing and bring for fossil energy is increasingly tight The problem of environmental pollution of weight, all promotes the fast development of regenerative resource.

Biomass energy can efficiently be utilized by biomass energy switch technology, produce various clean energy resource and chemical industry productions Product, so as to reduce dependence of the mankind for fossil energy, mitigate fossil energy and consume to pollution caused by environment.At present, the world Especially developed country of various countries, all is being directed to developing efficient, free of contamination biomass energy utilization technologies, with the ore deposit of protection this country Thing energy resources, to realize that the sustainable development of national economy provides basic guarantee.Biomass pyrolytic refers to that biomass is not having Under conditions of oxidant (air, oxygen, vapor etc.) has or be provided only with limit oxygen, it is heated to exceed 500 DEG C, passes through heat chemistry Biomass macromolecular substances (lignin, cellulose and hemicellulose) are resolved into the fuel material (solid-state compared with small molecule by reaction Charcoal, combustible gas, bio oil) thermochemical study technical method.The fuel energy conversion ratio of biomass pyrolytic is up to 95.5%, most Biomass energy is converted into energy products by limits, is made the best use of everything, and is pyrolyzed and is burnt and gasify essential first Stage beginning.

Bio oil is high as a kind of get more and more people's extensive concerning but bio oil oxygen content of regenerative resource, complicated components. Include the multiclass material such as phenols, aldehydes, ketone, ethers and furans, there are it is aqueous it is more, calorific value is low, poor chemical stability, no It can dissolve each other and the shortcomings of corrosivity, current motive power machine equipment can not be directly applied to, it is necessary to by catalytic hydrodeoxygenation essence Unionfining technique is made and be hydrocracked to be modified, improves the standard that can be only achieved clean fuel after the quality of oil product.

Biomass energy is as a kind of clean regenerative resource, and unique regenerative resource, the fast speed heat of biomass It is considered as one of most potential application technology that solution bio oil and bio oil catalytic hydrogenation, which prepare green traffic fuel, its In be most widely used with wood tar.Wood tar be organic matter in agricultural solid waste by fast pyrolysis technology, it is produced Liquid bio-oil, key component includes tar, solvent naphtha and oxygenatedchemicals etc., can be used directly as fuel, by adding The substitute of fossil fuel can be become after hydrogen refinement treatment.Wood tar hydrogenation combined unit is that wood tar raw material is de- by hydrogenation After oxygen process is handled with hydrocracking process, final output hydrotreated naphtha product.Combined unit is hydrogenated with hydrogenation process In can produce minor amount of water, existing dehydration equipment can not carry out deep dehydration processing to material, and device operation is caused compared with heavy load, Device operation energy consumption is high at present, and Useful Time of Hydrogenation Catalyst is short, and device parallel-adder settle-out time is short, and main cause is hydrogenation joint Water content is high in device single unit system, and severe jamming is caused to device operation, is badly in need of one kind and hydrogenation combined unit substep is dehydrated Technique, reduce single unit system water content.

The method of oil dehydrating at present mainly have gravitational separation process, centrifugal separation, electric field dehydration method, vacuum dehydration method, The methods of chemical demulsification evaporation, absorption process, absorption method, membrane separation process, coalescence evaporation.

The larger fluid of aqueous concentration is generally handled using gravitational separation process, from the point of view of service condition, the master of gravity precipitation Want equipment and have except water pot, except pond etc., it is necessary to very big container and very low flow velocity, processing time is longer, degreasing fluid can not be removed In dissolving water and emulsified water.

Centrifugal separation is typically used for the quick separating of free water, is not suitable for dissolving the separation of water and emulsified water.It is quiet Electric dehydration method refers to that crude oil emulsion under the action of electrostatic field, realizes electrostatic demulsifying, makes water droplet in gravity or centrifugation masterpiece Grown up with lower rapid coalescence, to achieve the purpose that water-oil separating, but electric field dehydration method there are it is obvious the defects of：Equipment operation energy consumption Compare high, there are operating safety risks.

Vacuum dehydration refer to due to oil it is different with the boiling point of water, the two separation can be made by the method for vacuum distillation, but Vacuum dehydration needs that fluid is heated to the boiling point of water under the pressure under vacuo, so energy consumption is very high.The equipment of vacuum dehydration General capacity is smaller, and treatment effeciency is relatively low.

Chemical demulsification is dehydrated, and mainly utilizes the materials such as the stronger demulsifier of surface-active so that demulsification agent molecule penetrates into And adsorb on oil-water interface, the additive molecules such as emulsifying agent therein are displaced, change interface membrane property is ruptured up to film, So that the small water droplet of cladding constantly collides coalescence into large water droplet in film, divide under the effect of the other manners such as gravity with fluid Leave and, although demulsifier is widely used in crude oil emulsion dehydration field, because the addition of chemical reagent may Secondary pollution can be produced to oil product, its physical and chemical performance be influenced, so the application in terms of fluid dehydration is ripe not enough.

Material (such as calcium hydride, aluminum hydride and the metal oxide easily chemically reacted with water is added in fluid Deng), the moisture in fluid is consumed using these materials, is referred to as absorption dewatering method, this method mainly removes degreasing fluid In free water.But the material easily chemically reacted with moisture is added into fluid, then need to carry out reaction product tight Lattice processing, thus improve the complexity of dewatering process and equipment, while add cost, institute is in this way in practice also very Few application.

Absorption method i.e. using the material such as the preferable polymeric sorbent of water absorbing properties, by Free water contained in fluid and Emulsified water absorbs, and to realize water-oil separating, but absorbent material can quickly reach its saturation degree, and the cost of polymeric sorbent with Regeneration cost is all higher, thus absorption method applies in general to the very low occasion of fluid water content.

Membrane separation process is the lipophile or hydrophily using porous membrane, by screening, film split-phase, reverse osmosis or super ooze Saturating principle separates oil and the water in liquid liquid dispersion, but membrane separation process processing speed is slow, the low service life of film is film point From the technical barrier of method.In addition, when removing the high lubricating oil of viscosity, also without good membrane separation assemblies.

The emulsification state water droplet of 5-20um can be kept completely separate by coalescence evaporation, and without adding chemical reagent, equipment is taken up an area Area is small, and cost of investment is low.

Patent ZL01823742.8 oil dehydrators disclose a kind of method that oily dehydration is carried out using film, but exist use into The problem of this damage high, easy to pollute；The patent of Application No. 200810042145.2 disclose a kind of method of diesel oil dewatering with Device, the patent are separated using eddy flow method, due to the technical characteristic of cyclonic separation, only can be suitably used for more than 15 μm of trip From the separation of water droplet, and it is larger to operate pressure drop, it is impossible to realizes oil product efficiently and the deep dehydration of low consumption；Patent ZL201010145423.4 discloses a kind of heavy oil and coal tar dehydrator, using roller evaporated form be dehydrated, relative energy consumption compared with Height, operation is complex, is only applicable to the oil dehydrating process of particular medium, ZL200910065725.8 discloses a kind of use The method and device of electric field dehydration, patent 201010261697.X disclose a kind of method and dress using ultrasonic technology dehydration Put, the patent of Application No. 201310352748.3 discloses a kind of method using filtering-eddy flow-coalescence-eddy flow and carries out weight The method of dirty oil dewatering, above patented technology are only applicable in specific occasion, are all asked there are energy consumption is higher, accommodation is relatively narrow Topic, does not reach the requirement of oil product deep dehydration yet.

Wood tar hydrogenation combined unit is badly in need of a kind of strong applicability, the dehydration technique that dehydrating effect is stable, efficient at present, The water produced to each process of hydrogenation combined unit carries out substep dehydration, reduces plant energy consumption, lifting device economic benefit.

Utility model content

In order to solve the deficiencies in the prior art, the utility model is based on nona modified fiber modular polyketide junction depth dehydration skill For art with its special form of presentation, X-type form of presentation and Ω type form of presentation, unique demulsification advantage, is different from general filter core The coalescence dehydration of formula, fibre module porosity is larger, can pass through minute solid particles, it is not easy to the advantages that blocking, utility model A kind of method of wood tar hydrogenation combined unit distribution dehydration, concrete technical scheme are as follows：

A kind of device of wood tar hydrogenation joint substep dehydration, adds from wood tar raw material dehydration device successively pipeline connection BDO Hydrogen deoxidation reactor, BDO cold high pressure separators, BDO cold lows separator, OTM hydrocracking reactors, the separation of OTM cold anticyclones Device, OTM cold lows separator, COU bio oils fractionating column and product oil deep dehydration device；

Deep dehydration unit is equipped with the wood tar raw material dehydration device, which is nona modified fiber mould Block dehydrator, according to flow direction, fluid rectification distributor, X are set gradually in the nona modified fiber modularization dehydrator Type cohesive fiber module, strengthen settling module, Ω moldeed depth degree separation fibre module；Wherein in X-type cohesive fiber module, oleophylic is dredged Aqueous fiber and hydrophilic and oleophobic property fiber angle are 25~45 °.

Further, the cold high pressure separator installs additional with cold low separator in the separator interior of the prior art Internals are separated, cold high pressure separator internals work out fibre module, ripple plate module for X-type, and cold low separator internals are Ω types Work out fibre module；Water content is in below 1000ppm, containing after the processing of cold low separator after cold high pressure separator is handled Water is in below 100ppm.

Further, the deep dehydration device uses nona modified fiber candle filter, nona modified fiber filter core By hydrophilic, hydrophobic two kinds of fibers shuffling in varing proportions, it is wrapped in core pipe and is made.Fiber string diameter is 50-200 μm, core Pipe diameter is DN50-DN500.Through deep dehydration device processing after product water content below 50ppm (temperature control 50 DEG C with Under), reach technical indicator of dispatching from the factory.

During the device work of the utility model wood tar hydrogenation joint substep dehydration, include the following steps：

(1) the wood tar raw material of wood tar hydrogenation deoxidation device (BDO devices) first passes through deep dehydration unit；Taken off through depth Wood tar after water is mixed into BDO device hydrogenation deoxidation reactors with the light diesel fuel raw material of BDO devices again；

(2) BDO device reactions product enters transformation BDO cold high pressure separators and carries out preliminary hydro-extraction processing；Engineered BDO Distillate after cold high pressure separator preliminary hydro-extraction is entered in transformation BDO cold low separators, after carrying out deep dehydration processing Wood tar is entered to be hydrocracked in (OTM) device；

(3) OTM device reactions product, which is entered in transformation OTM cold high pressure separators, carries out preliminary hydro-extraction processing, engineered Distillate after OTM cold high pressure separator preliminary hydro-extractions is entered in transformation OTM cold low separators, carries out deep dehydration processing Enter afterwards in fractionating column and be fractionated, output naphtha and light diesel fuel product；

(4) naphtha and light diesel fuel product most dispatch from the factory after deep dehydrator is handled afterwards.

Deep dehydration unit described in step (1) is nona modified fiber modularization dehydrator, in modularization dehydrator Portion's structure uses the dehydrated structure that Chinese patent ZL201410210965.3 is proposed, is rectification mould respectively according to flow direction Block, X-type establishment fibre module, ripple plate module, Ω types establishment fibre module, the wood tar feed moisture content is 0.5%- 0.6%, wood tar water content is in below 100ppm after processing.

Study and find through utility model people long-term experiment, in X-type cohesive fiber module, when lipophilic-hydrophobic property fiber and parent When water lipophobic fibers angle is 25~45 °, there is efficient separative efficiency to emulsification water droplet, because when angle is smaller, emulsification When water drop motion is at two kinds of fiber nodes, water droplet receives the drag of hydrophilic and oleophobic property fiber, and angle is smaller, horizontal movement away from From it is equal when water droplet loading process it is longer, it is easier to separate.When lipophilic-hydrophobic property fiber and hydrophilic and oleophobic property fiber angle are 45 At~60 °, the quick separating of the water droplet poor to emulsifying effectiveness has preferable effect.Fibre module is separated in Ω moldeed depth degree In, fibrage number of share of stock is more, and voidage is smaller, and fibre module separating effect is better；Under the conditions of the braiding of identical fibre number of share of stock, Hydrophilic and oleophobic property fiber proportion is more, then depth water removal effect is better.X-type cohesive fiber module and the separation of Ω moldeed depth degree are fine Dimension mould two kinds of fibers in the block pass through modification, and fiber string diameter is smaller, are existed by the smaller i.e. fluid of the cross sectional flow rate of fiber The residence time is longer in fibre module, has for the break milk separation for disperseing the capture of water droplet, coalescence grows up and emulsifies water droplet More preferable effect.

Cold high pressure separator described in step (2) and step (3) is to separate with cold low reform of separator method Install separation internals inside device additional, cold high pressure separator internals work out fibre module, ripple plate module, cold low separator for X-type Internals work out fibre module for Ω types；Water content is in below 1000ppm after cold high pressure separator is handled, through cold low separator Water content after processing is in below 100ppm.

Deep dehydrator described in step (4) uses nona modified fiber candle filter, nona modified fiber filter Core is wrapped in core pipe and is made by hydrophilic, hydrophobic two kinds of fibers shuffling in varing proportions.Fiber string diameter is 50-200 μm, The a diameter of DN50-DN500 of core pipe.Through deep dehydration device processing after product water content below 50ppm (temperature control 50 DEG C with Under), reach technical indicator of dispatching from the factory.

The beneficial effects of the utility model are：

(1) the utility model is dehydrated for the charging of wood tar hydrogenation combined unit, intermediate product, final products substep, For different material, different treatment technology indexs, respective dehydrator inner member is designed, will in the technology for ensureing technique dehydration Ask, reduce the design cost of device.

(2) the utility model dehydrating effect is good, and operating flexibility is big, and the dehydration suitable for hydrogenation process integration will Ask, reduce the operation energy consumption of each technological process, improve product quality, the economic benefit of lifting device.

(3) the utility model, which can use, transforms existing apparatus or newly goes up equipment, and improvement cost is low, dehydration equipment operation energy Consume low, do not produce extra processing cost.

Brief description of the drawings

Fig. 1 is the device flow chart of embodiment 1；

Fig. 2 is nona modified fiber modularization evaporator structure schematic diagram；

Fig. 3 is nona modified fiber candle filter structure diagram.

Symbol description：

1 wood tar raw material dehydration device；2BDO hydrogenation deoxidation reactors；3BDO cold high pressure separators；

4BDO cold low separators；5OTM hydrocracking reactors；6OTM cold high pressure separators；

7OTM cold low separators；8COU bio oil fractionating columns；9 product oil deep dehydration devices；

10 fluid rectification distributors；11X type cohesive fiber modules；12 strengthen settling module；

13 Ω moldeed depth degree separate fibre module；14 nona modified fiber filter cores；

F1 wood tar raw materials；Wood tar raw material after F2 dehydrations；F3 hydrogenation deoxidation reaction intermediates；

Material after the cold high score preliminary hydro-extractions of F4；Material after the cold low point of deep dehydration of F5；

F6 hydrocracking reaction intermediate products；Material after the cold high score preliminary hydro-extractions of F7；

Material after the cold low point of preliminary hydro-extraction of F8；F9 fractionator products；F10 product oils；

Embodiment

The utility model is specifically described below by embodiment 1.It is necessarily pointed out that following embodiments It is served only for that the utility model is described in further detail, it is impossible to the limitation to scope of protection of the utility model is interpreted as, the field Some nonessential modifications and adaptations that professional technician's content according to the present utility model is made, still fall within the utility model Protection domain.

30,000 tons/year of wood tar hydrogenation joint pilot-plants of certain energy company, by wood tar hydrogenation deoxidation device, (BDO is filled Put), wood tar hydrocracking unit (OTM devices) constituted jointly with biological oil separating device (COU devices), combined unit is main Effect is final output light diesel fuel, heavy diesel fuel by wood tar raw material after hydrogenation deoxidation technique and hydrocracking process processing With the common fossil fuel product such as naphtha.But device is found in the process of running, material moisture index is tight in combined unit Weight is exceeded, and micro-moisture is produced in hydrogenation process, subsequent reactions device is interfered, existing dehydration equipment can not be to thing Material carries out deep dehydration processing, and device operation energy consumption is high at present, and Useful Time of Hydrogenation Catalyst is short, device parallel-adder settle-out time Short, main cause is that water content is high in hydrogenation combined unit single unit system, and severe jamming is caused to device operation, and it is a kind of right to be badly in need of Combined unit substep dehydrating process is hydrogenated with, reduces single unit system water content.The utility model provides a kind of wood tar hydrogenation The method of combined unit substep dehydration.Process flow chart is as shown in Figure 1：

Wood tar raw material first passes through deep dehydration unit 1；Wood tar after the deep dehydration light diesel fuel with BDO devices again Raw material is mixed into BDO device hydrogenation deoxidations reactor 2；BDO device reaction products enter transformation BDO cold anticyclone separation Device 3 carries out preliminary hydro-extraction processing；It is cold low that distillate after engineered 3 preliminary hydro-extraction of BDO cold high pressure separators enters transformation BDO Press in separator 4, entering wood tar after progress deep dehydration processing is hydrocracked in (OTM) reactor 5；OTM device reactions Product, which is entered in transformation OTM cold high pressure separators 6, carries out preliminary hydro-extraction processing, and engineered OTM cold high pressure separators 6 are tentatively de- Distillate after water is entered in transformation OTM cold lows separator 7, enters bio oil separator after carrying out deep dehydration processing In fractionating column 8 in be fractionated, output naphtha and light diesel fuel product；Naphtha and light diesel fuel product are most afterwards through deep dehydration Dispatch from the factory after the processing of device 9.

The deep dehydration unit that the utility model uses is nona modified fiber modularization dehydrator, as shown in Figure 2.Module Change the dehydrated structure that dehydrator internal structure uses Chinese patent ZL201410210965.3 to be proposed, according to flow direction, divide Be not rectification module, X-type establishment fibre module, ripple plate module, Ω types establishment fibre module, the wood tar feed moisture content For 0.5%-0.6%, wood tar water content is in below 100ppm after processing.

Study and find through utility model people long-term experiment, in X-type cohesive fiber module, when lipophilic-hydrophobic property fiber and parent When water lipophobic fibers angle is 25~45 °, there is efficient separative efficiency to emulsification water droplet, because when angle is smaller, emulsification When water drop motion is at two kinds of fiber nodes, water droplet receives the drag of hydrophilic and oleophobic property fiber, and angle is smaller, horizontal movement away from From it is equal when water droplet loading process it is longer, it is easier to separate.When lipophilic-hydrophobic property fiber and hydrophilic category oiliness fiber angle are 45 At~60 °, the quick separating of the water droplet poor to emulsifying effectiveness has preferable effect.Fibre module is separated in Ω moldeed depth degree In, fibrage number of share of stock is more, and voidage is smaller, and fibre module separating effect is better；Under the conditions of the braiding of identical fibre number of share of stock, Hydrophilic and oleophobic property fiber proportion is more, then depth water removal effect is better.X-type cohesive fiber module and the separation of Ω moldeed depth degree are fine Dimension mould two kinds of fibers in the block pass through modification, and fiber string diameter is smaller, are existed by the smaller i.e. fluid of the cross sectional flow rate of fiber The residence time is longer in fibre module, has for the break milk separation for disperseing the capture of water droplet, coalescence grows up and emulsifies water droplet More preferable effect.

The cold high pressure separator and cold low reform of separator method that the utility model uses are to add in separator interior Dress separation internals, cold high pressure separator internals work out fibre module, ripple plate module for X-type, and cold low separator internals are Ω Type works out fibre module；Water content is in below 1000ppm after cold high pressure separator is handled, after the processing of cold low separator Water content is in below 100ppm.

The deep dehydrator that the utility model uses uses nona modified fiber candle filter, as shown in Figure 3.Nanometer Modified fibre filter core is wrapped in core pipe and is made by hydrophilic, hydrophobic two kinds of fibers shuffling in varing proportions.Fiber string diameter is 50-200 μm, a diameter of DN50-DN500 of core pipe.Product water content is in below 50ppm (temperature controls after the processing of deep dehydration device System is below 50 DEG C), reach technical indicator of dispatching from the factory.

30,000 tons/year of wood tar hydrogenation combined units of certain energy company are transformed using method provided by the utility model Afterwards, through calibration wood tar raw material after deep dehydration cell processing, feed moisture content drops to below 100ppm by 0.5%, wood Hydrogenation of tar device for deoxidizing (BDO devices) and wood tar hydrocracking unit (OTM devices) product water content through preliminary hydro-extraction with Stability contorting is in below 100ppm after deep dehydration processing, and control is in below 50ppm when running preferable；Biological oil separating device The product oil that (COU devices) fractionates out is after deep dehydrator is handled, and (temperature is 50 in 50ppm for product oil water content control Below DEG C).Calibration result proves that the substep dewatering through the utility model, the energy consumption of wood tar hydrogenation combined unit is significantly Degree declines, and catalyst life greatly prolongs, and product quality significantly improves, and device economic benefit significantly improves.

Claims (4)

1. a kind of device of wood tar hydrogenation joint substep dehydration, it is characterised in that from wood tar raw material dehydration device successively pipeline It is cold to connect BDO hydrogenation deoxidations reactor, BDO cold high pressure separators, BDO cold lows separator, OTM hydrocracking reactors, OTM High-pressure separator, OTM cold lows separator, COU bio oils fractionating column and product oil deep dehydration device；

Deep dehydration unit is equipped with the wood tar raw material dehydration device, which is nona modified fiber modularization Dehydrator, according to flow direction, sets gradually fluid rectification distributor, X-type gathers in the nona modified fiber modularization dehydrator Tie fibre module, strengthen settling module, Ω moldeed depth degree separation fibre module；Wherein in X-type cohesive fiber module, lipophilic-hydrophobic property Fiber and hydrophilic and oleophobic property fiber angle are 25~45 °.

2. the device of wood tar hydrogenation joint substep dehydration according to claim 1, it is characterised in that the cold anticyclone Separator installs additional in the separator interior of the prior art with cold low separator and separates internals, and cold high pressure separator internals are X Type establishment fibre module, ripple plate module, cold low separator internals work out fibre module for Ω types；At cold high pressure separator Water content is in below 1000ppm after reason, and the water content after the processing of cold low separator is in below 100ppm.

3. the device of wood tar hydrogenation joint substep dehydration according to claim 1, it is characterised in that the depth takes off Hydrophone uses nona modified fiber candle filter, nona modified fiber filter core by hydrophilic, hydrophobic two kinds of fibers in varing proportions Shuffling, is wrapped in core pipe and is made.

4. the device of wood tar hydrogenation joint substep dehydration according to claim 3, it is characterised in that the fiber string diameter For 50-200 μm, a diameter of DN50-DN500 of core pipe.