CN218465652U - Non-hydrogenation purification pretreatment of water and steam generation system - Google Patents

Abstract

The utility model provides a non-hydrogenation purification pretreatment of water and steam generation system, remove including the deoiling and hang the unit and take place the steam unit, the deoiling removes and hangs the unit and is linked gradually by AMFD self-adaptation cyclone, first MPE granule takes off solid degreaser and second MPE granule takes off solid degreaser, SEP one-level purifying tank and SEP second grade purifying tank, it includes the charge pump to take place the steam unit, blowdown heat exchanger, feeding preheater, steam generating tank, steam superheater to be connected with steam generator on the steam generating tank, steam generator links to each other with feeding preheater, still is connected with the blowdown cooler on the blowdown heat exchanger, SEP second grade purifying tank links to each other with the charge pump who takes place the steam unit, the utility model discloses need not the medicament, through purification pretreatment of water and retrieval and utilization steam generation, alleviate the processing load in sewage treatment field greatly, reached energy saving and emission reduction's effect, have fine economic benefits and environmental protection benefit.

Description

Non-hydrogenation purification water pretreatment and steam generation system

Technical Field

The utility model relates to a processing technology field that non-hydrogenation purification water deoiling removed and hangs, concretely relates to non-hydrogenation purification pretreatment of water and steam generation system.

Background

Along with the deterioration of crude oil, the proportion of high-sulfur, high-acid and high-nitrogen heavy oil processed by a refinery is higher and higher, so that the concentration of corrosive media discharged by acidic water of a refinery enterprise is high, and the problem is highlighted.

Along with the stricter requirements on environmental protection, the efficient utilization of water resources in refining enterprises is well made, and particularly, the recycling of purified water stripped by an acid water stripping device is one of important means for energy conservation and emission reduction of refining enterprises. If not effective for treating the purified water, it contains corrosive media such as NH ₃ 、H ₂ S、Cl ^- And Fe ²⁺ The continuous accumulation in the circulation of the purified water recycling can aggravate the corrosion of related process pipelines, equipment and the like and seriously affect the normal production.

And (3) carrying out qualitative analysis on the acidic and basic organic matters by a gas chromatography-mass spectrometry (GC-MS) technology. As a result, the acidic organic matters in the purified water are all phenolic compounds, wherein the relative contents of phenol and monosubstituted methyl phenol are 58.6% and 37.1%, respectively; the relative content of aniline in the basic organic matter is 24.2%, and the relative content of other nitrogen-containing heterocyclic compounds and fatty amine is 75.7%. Meanwhile, the experiment analyzes the total COD of the distilled water and the raw water sample after the acid addition and distillation, and finds that 31.2 percent of organic matters in the purified water are alkaline organic matters. According to the Henry constant experimental values of all the substances, in the stripping process, the disubstituted methylphenol, the pyridine and the monosubstituted methylaniline in the raw material acidic water enter a three-stage partial condenser for side-draw ammonia along with the gas phase, and the phenol, the monosubstituted methylphenol and the aniline are concentrated in the purified water.

Disclosure of Invention

In order to solve the technical defect that prior art exists, the utility model provides a non-hydrogenation purification pretreatment of water and steam generation system, oil and suspended solid in the degree of depth desorption purification water make its purification aquatic oil content fall within 5mg/L, reach the technological requirement of steam generation.

The utility model discloses a technical solution be: the utility model provides a non-hydrogenation purification water preliminary treatment and steam generation system, is including deoiling remove the suspension unit and take place the steam unit, deoiling remove the suspension unit by AMFD self-adaptation cyclone, first MPE granule takes off solid degreaser and second MPE granule takes off solid degreaser, SEP one-level purifying tank and SEP second grade purifying tank and link to each other in proper order, first MPE granule take off solid degreaser and second MPE granule and take off parallelly connected setting between the solid degreaser, the steam generation unit include charge-in pump, blowdown heat exchanger, feeding pre-heater, steam generator jar, steam superheater, steam generator jar on be connected with steam generator, steam generator and feeding pre-heater link to each other, the blowdown heat exchanger on still be connected with blowdown cooler, blowdown heat exchanger blowdown water to sewage system after blowdown cooler cooling, SEP purifying tank and steam generation unit's charge-in pump link to each other.

The tops of the AMFD self-adaptive cyclone separator, the first MPE particle solid removal oil remover, the second MPE particle solid removal oil remover, the SEP primary purification tank and the SEP secondary purification tank of the oil removal suspension removal unit are all connected with dirty oil discharge pipelines, and the dirty oil discharge pipelines discharge dirty oil to a dirty oil tank.

And a sewage draining line is arranged at the bottom of the steam generating tank and is connected to a sewage draining heat exchanger.

The steam generator is connected with the top of the steam generating tank, and purified water in the steam generating tank is circulated through the steam generator.

The feeding preheater is connected with a condensed water pipe network.

The utility model has the advantages that: the utility model provides a non-hydrogenation purification pretreatment of water and steam generation system, hang the unit and steam generation unit including the deoiling, the deoiling is removed and is hung the unit by AMFD self-adaptation cyclone in proper order, first MPE granule takes off solid degreaser and second MPE granule takes off solid degreaser, SEP one-level purification jar and SEP second grade purification jar link to each other in proper order, first MPE granule takes off solid degreaser and second MPE granule takes off parallelly connected setting between the solid degreaser, steam generation unit includes the feed pump, blowdown heat exchanger, the feeding pre-heater, steam generation jar, steam superheater, be connected with steam generator on the steam generation jar, steam generator links to each other with the feeding pre-heater, still be connected with the blowdown cooler on the blowdown heat exchanger, blowdown heat exchanger is blowdown water to sewage system after the blowdown cooler cooling, SEP second grade purification jar links to each other with the feed pump that steam generation unit, the utility model discloses need not have the medicament, through purification pretreatment of water and retrieval and utilization steam generation, alleviate the treatment load of sewage treatment field greatly, reached energy saving and emission reduction's effect, have fine economic benefits and environmental protection benefit.

Drawings

Fig. 1 is a schematic diagram of the structure of the non-hydrogenation purification water pretreatment and steam generation system of the present invention.

FIG. 2 is a schematic diagram of the AMFD (a) structure; (b) a multi-tube integration apparatus diagram.

Fig. 3 shows the principle of three-phase separation in the core tube.

Fig. 4 is a schematic diagram of the principle of removing oil from anisotropic composite fiber particles.

FIG. 5 is a schematic diagram of normal operation of the apparatus for removing oil from heterogeneously dispersed particles.

Fig. 6 shows that the internal voids of the anisotropic particles adsorb oil droplets.

FIG. 7 is a structural view of a high efficiency oil-water separation membrane.

The system comprises a 1-AMFD self-adaptive cyclone separator, a 2-third MPE particle solid removal oil remover A, a 3-second MPE particle solid removal oil remover B, a 4-SEP primary purification tank, a 5-SEP secondary purification tank, a 6-feed pump, a 7-purified water-blowdown heat exchanger, an 8-feed preheater, a 9-steam generator, a 10-steam generation tank, an 11-steam superheater and a 12-blowdown cooler.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

The utility model provides a non-hydrogenation water purification preliminary treatment and steam generation system, is including deoiling remove and hang the unit and the steam generation unit, deoiling remove and hang the unit by AMFD self-adaptation cyclone separator (1), first MPE granule takes off solid degreaser (2) and second MPE granule takes off solid degreaser (3), SEP one-level purification jar (4) and SEP second grade purification jar (5) and link to each other in proper order, first MPE granule take off solid degreaser (2) and second MPE granule take off solid degreaser (3) between parallel arrangement, the steam generation unit include charge pump (6), blowdown heat exchanger (7), feeding preheater (8), steam generation jar (10), steam superheater (11), steam generation jar (10) on be connected with steam generator (9), steam generator (9) link to each other with feeding preheater (8), blowdown heat exchanger (7) on still be connected with blowdown cooler (12), blowdown heat exchanger (7) blowdown water to sewage system after blowdown cooler (12) cools off, SEP purification jar (5) and steam generation jar (6) link to each other. The top parts of the AMFD self-adaptive cyclone separator (1), the first MPE particle solid removal oil remover (2), the second MPE particle solid removal oil remover (3), the SEP primary purification tank (4) and the SEP secondary purification tank (5) of the oil removal suspension removal unit are all connected with dirty oil discharge pipelines, and the dirty oil discharge pipelines discharge dirty oil to a dirty oil tank. And a sewage draining line is arranged at the bottom of the steam generating tank (10) and is connected to the sewage draining heat exchanger (7).

The steam generator (9) is connected with the top of the steam generating tank (10), and purified water in the steam generating tank (10) is circulated through the steam generator (9).

The feeding preheater (8) is connected with a condensed water pipe network.

AMFD self-adaptive cyclone separation principle

The AMFD cyclone separation is based on particle size classification separation and is divided into a main separation cavity and an auxiliary separation cavity. Oil and water enter the separator from the bottom of the main separation cavity, form rotating flow motion under the action of the rotating blades, and large-particle-size oil drops are quickly separated under the action of rotational flow and are discharged from the upper part of the main separation cavity; and the unseparated oil drops with small grain size enter the auxiliary separation cavity with smaller rotating radius, and the quick separation is realized under the action of larger centrifugal force. When the flow field is low, the rotary flow velocity of the main separation cavity is low, only the distribution effect is achieved, the main separation effect is achieved, and the auxiliary separation cavity can adapt to a large flow fluctuation range, so that the separator is guaranteed to have high separation efficiency on oil drops with large particle sizes and oil drops with small particle sizes and adaptability to inlet working condition changes.

The AMFD cyclone separator can quickly separate and disperse suspended oil and partial emulsified oil, and can realize quick separation and dispersion of gas, solid and liquid phases by adopting a cyclone centrifugal separation type design. The unique design structure of the device enables the oil-water separation efficiency to reach more than 90%.

Principle of particle degreasing

The particle oil remover is mainly in the form of filler and comprises a heterosexual combined fiber particle module and heterosexual (hydrophilic and hydrophobic) dispersed particles.

The technical core of the heterosexual combined fiber particle module lies in coalescence, fusion and growth of emulsified oil drops. The larger the oil droplet size, the higher the oil removal efficiency. If the dispersed fine oil drops in the sewage can be combined into large oil drops, the oil removal efficiency can be greatly improved. The principle of the coalescence of oil drops is that the oily sewage passes through a filling bed layer formed by solid matters with oleophilic surfaces, so that fine oil drops in the water can be adhered to the surface of the filling bed layer and gradually accumulated to become large oil drops so as to accelerate separation. Generally, the material used for the coalescence bed layer is a substance with oleophilic and hydrophobic surface, i.e. the contact angle between oil and solid surface is less than 70 degrees, and the smaller the contact angle, the better the oleophilic and wetting performance.

The principle of the technique of anisotropically dispersing particles (degreasing) is shown in FIG. 5. A cavity is arranged in the equipment, and hydrophilic and hydrophobic particles are filled in the cavity. The water phase to be treated enters the coalescence bed layer from the lower part of the filling pipe, solid particles and floccules in the liquid inlet are filtered between the bed layers through the interception of hydrophilic and hydrophobic particles and the action of oil drops, and the oil drops after coalescence growth are collected at the oil pocket above the device. The water phase after being cleaned flows out from a lower outlet.

The materials of the anisotropic particles are mainly: nylon, teflon (Teflon), foam filter beads, granular balls and quartz sand. The oleophilic and oleophobic particles are randomly packed inside the device. The particles adsorb emulsified oil droplets or smaller suspensions in the remaining water by adsorption and coalescence. The suspended matter in water and the oil content in water are reduced integrally through the matching of the upper particles and the lower particles. Or different hydrophilic and hydrophobic materials are uniformly mixed and tightly compressed into a filter bed, and impurities in water are removed through the filtering, adsorbing and coalescing effects of the foreign particles on suspended matters and oil drops.

As described above in fig. 6. The hydrophilic and hydrophobic particles can provide a large specific surface area, tiny channels exist on the surfaces of the particles, and emulsified oil in the liquid to be treated can be adsorbed on the surfaces of the particles in the flowing process and enters the particles due to the action of capillary force. The oil-water separation capacity is greatly improved through the adsorption and coalescence of the particles on oil drops. The minimum content of dispersed oil (water) can be reduced to less than 10mg/L after separation in the process.

Meanwhile, due to the unique properties and structures of the foreign fiber particles, the self-adaptive capacity of the equipment to the treated incoming liquid can be increased in the conventional operation; jumping and shaking in a certain space range during backwashing can greatly enhance the backwashing efficiency.

SEP two-stage purification principle

The SEP secondary purification tank is the core of the oily wastewater treatment unit. The principle of the material is that the characteristic that oil and water are not mutually melted is utilized, and a high-efficiency oil-water separation membrane is adopted, so that the material can enable water to permeate in a single direction, and oil in water is intercepted, and the material has the function of rejecting oil adhesion.

When oil-containing water passes through the high-efficiency oil-water separation membrane, water on the water inlet side is replaced and permeated with water in the hydration membrane under proper pressure, and oil and other hydrophobic dispersoids cannot be replaced and permeated and are intercepted.

Because the high-efficiency oil-water separation membrane is coated by the hydration membrane, the intercepted oil can not be adhered to the body material, and can only remain near the outer surface of the high-efficiency oil-water separation membrane along with agglomeration and mutual collision and condensation of oil particles, so that oil-water separation is successfully realized, and the effect is defined as 'separation and oil removal'.

The oil-water separation device adopts high-efficiency oil-water separation membranes with different precision grades to block oil substances with different dispersion degrees in a targeted manner, so that the aim of quantitatively controlling the oil removal precision is fulfilled.

The SEP secondary purification tank has high precision, can be artificially quantitatively designed and controlled, and can still keep high-efficiency and stable water outlet under the condition that the oil content of the incoming water is continuously changed.

Due to the inherent selective oil intercepting function of the high-efficiency oil-water separation membrane and the characteristic of refusing oil adhesion, the oil-water separation can be stably and effectively carried out under the condition of wide fluctuation of the oil content of the incoming water.

The efficient oil-water separation membrane does not generate any backwashing in the whole life cycle, does not have regenerated water consumption, energy consumption, steam consumption, no addition of medicament, does not need special post setting, is simple and convenient to operate, and saves a large amount of manpower, material resources and financial resources.

The oil content of the incoming water is not strictly limited in the operation process, the incoming water is not cut off and discharged in general conditions, the incoming water is completely treated, and the whole process does not need frequent back washing, so that the total water recovery rate can reach more than 99 percent, and the process is the highest level of all processes at present, and has the best benefit.

The SEP secondary purification tank realizes the complete recovery of oil through the oil collector arranged at the top, the oil content of the separated oil is more than 50 percent, and the separated oil is similar to crude oil and can be recycled, thereby reducing the environmental water pollution.

When the device is polluted by accidental destructive oil, once the accident is eliminated, and the normal working condition is recovered, the high-efficiency oil-water separation membrane has the self-purification capability of automatic self-purification recovery function.

The normal operation of the device is: the water enters from top to bottom, the oil enters from top to bottom, and the water and oil paths do not need to be backwashed in the whole running process, so that the operation is simple and convenient, and the running is stable. The petroleum content of the effluent of the equipment is less than 5mg/L.

The process flow comprises the following steps:

non-hydrogenation purified water firstly enters an AMFD self-adaptive cyclone separator 1 to carry out coarse separation on oil and suspended matters in the acidic water, and top sump oil enters a sump oil tank; the purified water then enters MPE particle de-solidification oil removers 2 and 3 from the top, and the oil and suspended substances in the purified water are further separated; the MPE particle de-solidification oil remover AB is a first oil remover and a second oil remover, and the oil phase enters the sump oil tank from the top; purified water flows out of the bottom of the MPE particle de-solidification oil remover, then enters an SEP primary purification tank 4, the treated purified water flows out of the bottom, then enters an SEP secondary purification tank 5, dirty oil flows out of the top and flows into a dirty oil tank, the oil content in the purified water is removed to be less than 5ppm, the purified water after oil removal is sent to a purified water-sewage heat exchanger 7 through a feed pump 6, the purified water exchanges heat to about 60-90 ℃, then the purified water continuously exchanges heat with a feed preheater 8, the purified water exchanges heat to 90-120 ℃, and finally the purified water enters a steam generation tank 10. The sewage discharged from the steam generating tank 10 is sent to a sewage system in a fixed-row and continuous-row manner. The sewage at 143-184 ℃ is discharged from the bottom of the steam generating tank through a sewage discharge line, cooled to 60 ℃ through a purified water-sewage heat exchanger 7, finally cooled to 40 ℃ through a sewage discharge cooler 12, and discharged to a sewage system.

Purified water enters a steam generator 9 from a steam generating tank 10 in a natural circulation mode, and the steam generator 9 utilizes 1.0-3.5 MPa steam as a heat source; the purified water is returned to the top of the steam generating tank 10 after heat exchange by the steam generator 9, and saturated steam of 0.3-1.0 MPa is generated after flash evaporation; the 0.3-1.0 MPa saturated steam is sent into a 0.3-1.0 MPa steam pipe network after being superheated by a steam superheater 11. 1.0-3.5 MPa steam exchanges heat through a steam generator 9, then exchanges heat with a feed preheater 8, and condensed water is sent to a condensed water pipe network.

The skilled person should know that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the fan belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (5)

1. The utility model provides a non-hydrogenation water purification preliminary treatment and steam generation system, is including deoiling remove suspension unit and steam generation unit, its characterized in that, deoiling remove suspension unit by AMFD self-adaptation cyclone separator (1), first MPE granule takes off solid degreaser (2) and second MPE granule takes off solid degreaser (3), SEP one-level purification jar (4) and SEP second grade purification jar (5) continuous in proper order, first MPE granule take off solid degreaser (2) and second MPE granule take off solid degreaser (3) between parallelly connected the setting, steam generation unit include charge pump (6), blowdown heat exchanger (7), feeding preheater (8), steam generation jar (10), steam superheater (11), steam generation jar (10) on be connected with steam generator (9), steam generator (9) and feeding preheater (8) link to each other, blowdown heat exchanger (7) on still be connected with blowdown cooler (12), blowdown heat exchanger (7) blowdown water to the blowdown water cooler (12) after blowdown water is cooled, SEP purification jar (5) and steam generation unit (6) and the second grade steam generation pump that steam generation is linked to each other.

2. The system for pretreating and generating steam for non-hydrorefining water according to claim 1, wherein the AMFD adaptive cyclone separator (1), the first MPE particle de-solidification oil remover (2) and the second MPE particle de-solidification oil remover (3), the SEP primary purification tank (4) and the SEP secondary purification tank (5) of the oil removal suspension unit are connected with dirty oil discharge pipelines at the top, and the dirty oil discharge pipelines discharge dirty oil to the dirty oil tank.

3. The system for pretreating and generating steam for non-hydrorefined water according to claim 1, wherein a blowdown line is provided at the bottom of the steam generating tank (10), and the blowdown line is connected to a blowdown heat exchanger (7).

4. The system for pretreating and generating steam for non-hydrorefined water according to claim 1, wherein the steam generator (9) is connected to the top of the steam generating tank (10), and the refined water in the steam generating tank (10) is circulated through the steam generator (9).

5. The non-hydrorefined water pretreatment and steam generation system of claim 1, wherein said feed preheater (8) is connected to a condensate piping network.

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