CN215027688U - Complex iron desulfurization sulfur thick liquid integration processing apparatus - Google Patents
Complex iron desulfurization sulfur thick liquid integration processing apparatus Download PDFInfo
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- CN215027688U CN215027688U CN202120492221.0U CN202120492221U CN215027688U CN 215027688 U CN215027688 U CN 215027688U CN 202120492221 U CN202120492221 U CN 202120492221U CN 215027688 U CN215027688 U CN 215027688U
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Abstract
The utility model provides a complex iron desulfurization sulfur thick liquid integration processing apparatus relates to resource recovery and recycles technical field. The utility model provides an integrated treatment device which comprises a sulfur slurry cleaning and desulfurizing system and a desulfurizing liquid concentration system; the sulfur slurry cleaning and desulfurizing system comprises: the vacuum filter is provided with a sulfur slurry inlet, a desalted water spraying port, a desulfurized liquid outlet and a sulfur paste outlet; the doctor solution concentrating system comprises: the device comprises a raw material tank, a concentrator, a flash tank, a condensed water tank, a concentrated medicine outlet and a cooling water tank. The utility model provides a complex iron desulfurization sulphur thick liquid integration processing apparatus equipment is compact, and area is few, required space is little, adopts the utility model provides a device is handled complex iron desulfurization sulphur thick liquid, can realize the recycle of desulfurization agent in the complex iron desulfurization sulphur thick liquid to reduce desulfurization system's medicament supply, be favorable to maintaining desulfurization system water balance, and can realize the make full use of the energy, reduce the energy consumption.
Description
Technical Field
The utility model relates to a resource recovery recycles technical field, in particular to complex iron desulfurization sulfur thick liquid integration processing apparatus.
Background
As the amount of natural gas increases, the amount of hydrogen sulfide increases, and the hydrogen sulfide can cause equipment corrosion and catalyst poisoning, resulting in increased production costs and reduced product quality, and thus the hydrogen sulfide needs to be removed by desulfurization techniques. The complex iron desulfurization process has the advantages of simple process flow, high absorption speed, high desulfurization efficiency, no toxicity, simple and convenient equipment, economic and reasonable process and the like, and becomes a widely applied desulfurization technology. The prior art is limited by factors such as low sulfur capacity, large circulation capacity and the like in the aspects of equipment miniaturization, treatment cost reduction and the like, so that the problems of large volume, difficult prying, high treatment cost and the like of treatment equipment are caused. The desulfurization capacity can be improved by increasing the concentration of effective substances in a desulfurization agent system, so that the circulating liquid amount is effectively reduced, the energy consumption is greatly reduced, and meanwhile, the equipment investment and the operation cost are reduced.
A large amount of sulfur generated in the complex iron desulfurization process is dispersed in desulfurization liquid to form sulfur slurry, sulfur can be separated from the sulfur slurry system by diluting the sulfur slurry with water, and the separation of the sulfur from the sulfur slurry system can carry out a large amount of desulfurization liquid (the main component of the desulfurization liquid is a desulfurization agent iron complex, and in addition, a certain amount of sulfate and carbonate can be contained), so that the loss of the desulfurization liquid is large, and the amount of sulfur carried liquid accounts for 63% of the loss of the agent according to the analysis of industrial operation data. And because the desulfurization liquid contains a large amount of dilution water, the concentration of the desulfurization agent is low, and the desulfurization agent cannot be recycled, most enterprises directly discard the desulfurization liquid and supply a large amount of desulfurization agent again in the desulfurization process, and the increase of the volume of the desulfurization system agent is unfavorable for maintaining the water balance of the desulfurization system.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a complex iron desulfurization sulphur thick liquid integration processing apparatus. The device provided by the utility model can realize the recycle of desulfurization medicament in the desulfurization sulfur thick liquid of complex iron, avoid the wasting of resources, be favorable to maintaining desulfurization system's water balance.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
the utility model provides a complex iron desulfurization sulfur slurry integrated treatment device, which comprises a sulfur slurry cleaning desulfurization system and a desulfurization solution concentration system;
the sulfur slurry cleaning and desulfurizing system comprises:
the device comprises a vacuum filter 1, wherein the vacuum filter 1 is provided with a sulfur slurry inlet 1-1, a desalted water spraying port 1-2, a desulfurized liquid outlet 1-3 and a sulfur paste outlet 1-4;
the doctor solution concentrating system comprises:
a raw material tank 2 with a feeding port communicated with the desulfurization liquid outlet 1-3, wherein a heater 2-1 is arranged in the raw material tank 2;
the concentrator 3 is communicated with the outlet of the raw material tank 2 through a bottom feeding port, and the concentrator 3 is also provided with a heating steam inlet, a steam condensation outlet and a top discharging port; the steam condensation outlet is communicated with the inlet of the condensation water tank 5;
the flash tank 4 is provided with a top gas outlet and a bottom discharge hole, and the feeding hole is communicated with the top discharge hole of the concentrator 3; a bottom discharge hole pipeline of the flash tank 4 is converged with a bottom feeding hole pipeline of the concentrator 3, and the converged pipeline is also provided with a concentrated chemical outlet 4-1;
a cooling water tank 7 with an inlet in communication with the top gas outlet of the flash tank 4.
Preferably, the concentrator 3 is a rising-film tube-in-tube concentrator, a falling-film tube-in-tube concentrator, a horizontal tube-in-tube concentrator or a plate concentrator.
Preferably, a raw material pump P-1 is arranged on an outlet pipeline of the raw material tank 2; a concentration circulating pump P-2 is arranged on a discharge port pipeline at the bottom of the flash tank 4; and a vacuum pump P-3 is arranged on an inlet pipeline of the cooling water tank 7.
Preferably, the bottom outlet line of the flash tank 4 and the outlet line of the concentration circulation pump P-2 are also connected by an additional first line L-1.
Preferably, the concentrated medicament outlet 4-1 is communicated with the inlet of the concentrated medicament tank 6;
or the concentrated medicament outlet 4-1 is communicated with an evaporative crystallization system; the evaporative crystallization system comprises: the secondary steam inlet is communicated with the top gas outlet of the flash tank 4; the evaporative crystallizer 8 is also provided with an external steam inlet, a steam condensation outlet, an upper feeding port and a bottom discharging port; a feeding port at the upper part of the evaporative crystallizer 8 is communicated with a concentrated medicament outlet 4-1; a discharge port at the bottom of the evaporative crystallizer 8 is branched into a crystallization liquid outlet and a crystallization liquid circulating outlet, the crystallization liquid circulating outlet is communicated with a feeding port at the upper part of the evaporative crystallizer 8, and the crystallization liquid outlet is connected to a centrifuge 9; and a steam condensation outlet of the evaporative crystallizer 8 is communicated with an inlet of the condensed water tank 5.
Preferably, an agitator is provided inside the evaporative crystallizer 8.
Preferably, a crystallization circulating pump P-4 is arranged on a crystallization liquid circulating outlet pipeline of the evaporative crystallizer 8.
Preferably, the bottom outlet line of the evaporative crystallizer 8 and the outlet line of the crystallization circulation pump P-4 are also connected by an additional second line L-2.
The utility model provides a complex iron desulfurization sulfur slurry integrated treatment device, which comprises a sulfur slurry cleaning desulfurization system and a desulfurization solution concentration system; the sulfur slurry cleaning and desulfurizing system comprises: the device comprises a vacuum filter 1, wherein the vacuum filter 1 is provided with a sulfur slurry inlet 1-1, a desalted water spraying port 1-2, a desulfurized liquid outlet 1-3 and a sulfur paste outlet 1-4; the doctor solution concentrating system comprises: a raw material tank 2, a concentrator 3, a flash tank 4, a condensed water tank 5, a concentrated medicine outlet 4-1 and a cooling water tank 7. The utility model provides an integration processing apparatus equipment of complex iron desulfurization sulphur thick liquid is compact, area is few, required space is little, adopt the utility model provides a device is handled complex iron desulfurization sulphur thick liquid, can realize the recycle of desulfurization agent in the complex iron desulfurization sulphur thick liquid to reduce desulfurization system's medicament supply, be favorable to maintaining desulfurization system water balance, and can realize the make full use of the energy, reduce the energy consumption, specifically, the separation liquid that flash tank 4 produced is sent to concentrator 3 and is used as the heating material, make the interior feed liquid of concentrator maintain the boiling state, both retrieved the latent heat and improved the thermal efficiency.
Furthermore, the device provided by the utility model is used for processing the complex iron desulfurization sulfur slurry, and can also crystallize potassium sulfate in the sulfur slurry for separation, thereby avoiding the system blockage caused by the salt contained in the recovered desulfurization agent in the recycling process and influencing the desulfurization process; and the secondary steam generated by the flash tank 4 is used as a steam source of crystallization, so that the energy of the system is further fully utilized, the supply of external heat sources is reduced, and the energy consumption is reduced.
Drawings
FIG. 1 is a schematic view of an integrated complex iron desulfurization sulfur slurry treatment device provided by the utility model;
in figure 1, 1-vacuum filter, 1-1-sulfur slurry inlet, 1-2-desalted water spray port, 1-3-desulfurized liquid outlet, 1-4-sulfur paste outlet, 2-raw material tank, 2-1-heater, 3-concentrator, 4-flash tank, 4-1-concentrated chemical outlet, 5-condensate tank, 6-concentrated chemical tank, 7-cooling water tank, 8-evaporative crystallizer, 9-centrifuge, P-1-raw material pump, P-2-concentration circulating pump, P-3-vacuum pump, P-4-crystallization circulating pump, L-1-first connecting pipeline, L-2-second connecting pipeline.
Detailed Description
The utility model provides a complex iron desulfurization sulfur slurry integrated treatment device, which comprises a sulfur slurry cleaning desulfurization system and a desulfurization solution concentration system;
the sulfur slurry cleaning and desulfurizing system comprises:
the device comprises a vacuum filter 1, wherein the vacuum filter 1 is provided with a sulfur slurry inlet 1-1, a desalted water spraying port 1-2, a desulfurized liquid outlet 1-3 and a sulfur paste outlet 1-4;
the doctor solution concentrating system comprises:
a raw material tank 2 with a feeding port communicated with the desulfurization liquid outlet 1-3, wherein a heater 2-1 is arranged in the raw material tank 2;
the concentrator 3 is communicated with the outlet of the raw material tank 2 through a bottom feeding port, and the concentrator 3 is also provided with a heating steam inlet, a steam condensation outlet and a top discharging port; the steam condensation outlet is communicated with the inlet of the condensation water tank 5;
the flash tank 4 is provided with a top gas outlet and a bottom discharge hole, and the feeding hole is communicated with the top discharge hole of the concentrator 3; a bottom discharge hole pipeline of the flash tank 4 is converged with a bottom feeding hole pipeline of the concentrator 3, and the converged pipeline is also provided with a concentrated chemical outlet 4-1;
a cooling water tank 7 with an inlet in communication with the top gas outlet of the flash tank 4.
The utility model provides a complex iron desulfurization sulphur thick liquid integration processing apparatus includes sulphur thick liquid washing desulfurization system. The utility model discloses in, sulphur thick liquid washs desulfurization system includes: the vacuum filter 1 is provided with a sulfur slurry inlet 1-1, a desalted water spray port 1-2, a desulfurized liquid outlet 1-3 and a sulfur paste outlet 1-4. The utility model discloses it is right vacuum filter 1 does not have special requirement, adopt the vacuum filter that technical personnel in the field are familiar with can, cloth has the filter cloth in vacuum filter 1, can carry out solid-liquid separation to the sulphur thick liquid after wasing, forms sulphur cream and filtrating, filtrating doctor solution promptly. In the utility model, the desalted water spray opening 1-2 is preferably arranged above the vacuum filter 1, and the desalted water spray opening 1-2 is used for spraying desalted water into mist, so that the utility model has no special requirement on the number of the desalted water spray openings, and can fully spray the sulfur slurry; in the utility model, the desalted water spray nozzles 1-2 are preferably connected with a desalted water main pipe, namely a spray system is formed in which the desalted water main pipe is connected with a plurality of branch pipes with the desalted water spray nozzles; the desalted water main pipe is preferably provided with a check valve, and the branch pipe is preferably provided with a branch throttling valve. In the utility model, the doctor solution outlet 1-3 is preferably located below the vacuum filter 1. In the utility model, the sulfur paste outlet 1-4 is preferably connected with a belt conveyer to realize the continuous discharge of the sulfur paste.
The utility model provides an integration processing apparatus of complex iron desulfurization sulphur thick liquid includes the concentrated system of doctor solution the utility model discloses in, the concentrated system of doctor solution include the pan feeding mouth with the head tank 2 that doctor solution export 1-3 is linked together, be provided with heater 2-1 in the head tank 2. The utility model has no special requirements for the raw material tank 2 and the heater 2-1, and the raw material tank and the heater which are well known by the technicians in the field can be adopted; the heater 2-1 is used for preheating the desulfurization solution in the raw material tank. In the present invention, the outlet line of the raw material tank 2 is preferably provided with a raw material pump P-1, and the present invention has no special requirement for the raw material pump P-1, and it is sufficient to adopt a corresponding pump well known to those skilled in the art.
The utility model discloses in, doctor solution concentrated system include bottom pan feeding mouth with concentrator 3 that the export of head tank 2 is linked together, concentrator 3 still is provided with heating steam entry, steam condensation export and top discharge gate. The utility model discloses in, the bottom pan feeding mouth pipeline of concentrator 3 still preferably is provided with feeding choke valve and check valve, feeding choke valve and check valve are preferably set up on raw materials pump P-1's outlet pipe line, the feeding of feeding choke valve mainly used control concentrator to adjust the circulation feed liquid volume of concentrator. In the utility model, the heating steam inlet is preferably arranged at the upper part of the concentrator 3, the heating steam inlet is preferably connected with a steam generator, the steam generator is preferably a roots blower or a centrifugal compressor, wherein the roots blower is selected for use when the steam is in small flow, the centrifugal compressor is selected for use when the steam is in large flow, and the steam generator provides heat source steam for the system; the heating steam inlet pipeline is preferably provided with a steam ball valve. In the present invention, the steam condensation outlet is preferably provided at the lower portion of the concentrator 3; the steam condensation outlet is communicated with the inlet of the condensation water tank 5; the top outlet line is also preferably provided with a pressure relief valve. In the present invention, the concentrator 3 is preferably a rising film type tube array concentrator, a falling film type tube array concentrator, a horizontal tube shell concentrator or a plate concentrator, and specifically, steam is introduced into the shell side of the concentrator 3 to condense; the liquid is introduced into the tube and evaporated. In the present invention, the concentrator 3 serves to heat and concentrate the desulfurization solution entering the concentrator 3.
In the utility model, the doctor solution concentration system comprises a flash tank 4 with a feed inlet communicated with a top discharge port of the concentrator 3; the feeding port of the flash tank 4 is preferably arranged at the lower part of the flash tank 4, and the flash tank 4 is provided with a top gas outlet and a bottom discharge port. The utility model discloses there is not special requirement to flash tank 4, adopt the flash tank that technical personnel in the field are familiar with can. The utility model discloses in, the bottom discharge mouth pipeline of flash tank 4 joins with the bottom pan feeding mouth pipeline of concentrator 3, the pipeline that joins still is provided with concentrated medicament export 4-1. In the present invention, the bottom discharge port of the flash tank 4 is preferably provided with a concentration circulating pump P-2, specifically, the inlet of the concentration circulating pump P-2 is connected to the bottom discharge port of the flash tank 4, and the outlet of the concentration circulating pump P-2 is connected to the bottom feeding port of the concentrator 3 and the concentrated chemical outlet 4-1. In the present invention, the bottom discharge port line of the flash tank 4 and the outlet line of the concentration circulation pump P-2 are preferably connected through an additional first line L-1 for adjusting the circulation amount.
The utility model discloses in, doctor solution concentrated system include the entry with the cooling water pitcher 7 that the top gas outlet of flash tank 4 is linked together. In the present invention, the inlet line of the cooling water tank 7 is preferably provided with a vacuum pump P-3. The utility model has no special requirements for the cooling water tank 7 and the vacuum pump P-3, and adopts a cooling water tank and a vacuum pump which are well known by the technical personnel in the field.
As an embodiment of the present invention, the concentrated chemical outlet 4-1 is in communication with the inlet of the concentrated chemical tank 6. The utility model has no special requirement on the concentrated medicament tank 6, and a storage tank which is well known by the technical personnel in the field can be adopted.
As another embodiment of the present invention, the concentrated chemical outlet 4-1 is in communication with an evaporative crystallization system; the evaporative crystallization system comprises: the secondary steam inlet is communicated with the top gas outlet of the flash tank 4; the evaporative crystallizer 8 is also provided with an external steam inlet, a steam condensation outlet, an upper feeding port and a bottom discharging port. In the present invention, the external steam inlet and the secondary steam inlet are preferably respectively disposed at the upper portion of the evaporative crystallizer 8, the external steam inlet and the secondary steam inlet pipeline are preferably further provided with a steam ball valve, and the external steam inlet is preferably connected to the steam generator in the above technical solution, which is not described herein again; the steam condensation outlet is preferably arranged in the lower part of the evaporative crystallizer 8. In the utility model, a feeding throttle valve is preferably arranged on the upper feeding port pipeline of the evaporative crystallizer 8, and the feeding throttle valve is mainly used for controlling the feeding of the evaporative crystallizer so as to adjust the circulating liquid level of the evaporative crystallizer; and a feeding port at the upper part of the evaporative crystallizer 8 is communicated with a concentrated medicament outlet 4-1. In the utility model, the bottom discharge port of the evaporative crystallizer 8 is branched into a crystallization liquid outlet and a crystallization liquid circulation outlet, the crystallization liquid circulation outlet is communicated with the upper feeding port of the evaporative crystallizer 8, and the crystallization liquid outlet is connected to the centrifuge 9; and a steam condensation outlet of the evaporative crystallizer 8 is communicated with an inlet of the condensed water tank 5. In the present invention, the inside of the evaporative crystallizer 8 is preferably provided with a stirrer to prevent clogging; a crystallization circulating pump P-4 is arranged on a crystallization liquid circulating outlet pipeline of the evaporative crystallizer 8, specifically, an inlet of the crystallization circulating pump P-4 is connected with a crystallization liquid circulating outlet of the evaporative crystallizer 8, and an outlet of the crystallization circulating pump P-4 is connected with an upper feeding port and a concentrated medicine outlet 4-1 of the evaporative crystallizer 8. The utility model discloses it is right evaporative crystallizer 8's structure does not have special requirement, adopt the well-known evaporative crystallizer of technical personnel in the field can, evaporative crystallizer 8's shell side leads to steam, takes place the condensation, evaporative crystallizer 8's intraductal side lets in the feed liquid, takes place the crystallization. In the present invention, the bottom discharge port line of the evaporative crystallizer 8 is connected to the outlet line of the crystallization circulating pump P-4 through an additional second line L-2 for adjusting the circulation amount.
The utility model provides a complex iron desulfurization sulphur thick liquid integration processing apparatus equipment is compact, and area is few, required space is little, the utility model discloses still can adopt industrial computer and PLC to constitute MVR series's real time monitoring center, through software programming, gather the status signal of various sensors in real time to the automatic control valve closes and adjusts, the velocity of flow and the flow of liquid, the control and the regulation of temperature and pressure etc. make system's work reach dynamic balance's state, still can have automatic alarm simultaneously, automatic recording parameter and provide the various functions of report form.
Adopt the utility model provides a method that device carries out complex iron desulfurization sulfur thick liquid integration treatment, including following step:
the complex iron desulfurization sulfur slurry to be treated enters a vacuum filter 1 from a sulfur slurry inlet 1-1, desalted water is sprayed in through a desalted water spraying port 1-2, the complex iron desulfurization sulfur slurry is cleaned in the vacuum filter 1, and simultaneously, under the suction filtration action of the vacuum filter 1, sulfur paste and desulfurization liquid are formed, and the sulfur paste is discharged from a sulfur paste outlet 1-4;
the desulfurization solution enters a raw material tank 2 from a desulfurization solution outlet 1-3, and is preheated to the saturation temperature under the evaporation pressure in the raw material tank 2 by a heater 2-1;
the preheated desulfurization solution enters a concentrator 3, steam is introduced into the concentrator 3 to heat the desulfurization solution entering the concentrator 3, the desulfurization solution is heated to form a gas-liquid mixture, and the steam is condensed into water to enter a condensate water tank 5;
the gas-liquid mixture enters a flash tank 4 for gas-liquid separation to form separated liquid and secondary steam; the separation liquid is discharged from a discharge port at the bottom of the flash tank 4 and is converged with the preheated desulfurization liquid to form a mixed liquid, one part of the mixed liquid enters a feed port at the bottom of the concentrator 3 for cyclic concentration, and the other part of the mixed liquid flows out from a concentrated chemical agent outlet 4-1; the secondary steam is discharged from the top gas outlet of the flash tank 4 and condensed into the cooling water tank 7.
The utility model discloses with pending complex iron desulfurization sulphur thick liquid by sulphur thick liquid entry 1-1 entering vacuum filter 1, the desalinized water sprays mouthful 1-2 through the desalinized water and spouts into, right in vacuum filter 1 complex iron desulfurization sulphur thick liquid washs, simultaneously under vacuum filter 1's suction filtration effect, forms sulphur cream (filter cake promptly) and doctor solution (filtrating promptly), the sulphur cream is exported 1-4 by sulphur cream and is discharged. In the utility model, the desalted water is water for removing strong electrolyte or reducing the strong electrolyte to a certain degree, in particular deionized water with the residual salt content of 1 mg/L-5 mg/L; the utility model discloses it is right the flow that the demineralized water spouted into does not have special requirement, can with it can to wait to handle the complete washing of complex iron desulfurization sulphur thick liquid. The sulfur slurry is cleaned by desalted water and is subjected to solid-liquid separation by a vacuum filter, and sulfur is separated from the sulfur slurry to form sulfur paste; the main component of the desulfurization solution is a desulfurization agent iron complex, and in addition, a certain amount of sulfate and carbonate can be contained, and potassium sulfate is taken as the main component.
After obtaining the doctor solution, the utility model discloses will the doctor solution is preheated to saturation temperature under the evaporating pressure by heater 2-1 in feed cylinder 2 in by doctor solution export 1-3 entering feed cylinder 2, the utility model discloses preheat the doctor solution to this temperature, can guarantee that the doctor solution enters into and has better evaporative concentration effect in concentrator 3, make the steam in the concentrator 3 play the effect of stabilizing the temperature more.
The doctor solution preheats the back, the utility model discloses doctor solution after will preheating preferably gets into concentrator 3 through former feed pump P-1, and concentrator 3 lets in steam and heats the doctor solution that gets into in concentrator 3, and the doctor solution is heated and is formed gas-liquid mixture, and steam condensation water gets into condensation water pitcher 5. In the present invention, the process parameters of the concentrator 3 are preferably: tube side design/operating temperature: 80 ℃/60 ℃, tube side pressure/operating pressure: atmospheric pressure/atmospheric pressure, shell pass design/operating temperature: 120 ℃/100 ℃, shell side design/operating pressure: atmospheric pressure/atmospheric pressure. In the utility model, the main component of the gas in the gas-liquid mixture is water vapor, and the main component of the liquid is concentrated medicament; further, the gas-liquid mixture is depressurized by a pressure reducing valve arranged on a discharge port pipeline at the top of the concentrator 3 to form a low-pressure two-phase flow, and the low-pressure two-phase flow is discharged from the concentrator 3.
After obtaining the gas-liquid mixture, the utility model discloses will the gas-liquid mixture carries out gas-liquid separation in getting into flash tank 4, forms separating medium and secondary steam. In the present invention, the process parameters of the flash tank 4 are preferably: design/operating temperature: 80 ℃/60 ℃, design/operating pressure: -100/-80 kPa. In the utility model discloses in, the secondary steam is discharged by the top gas outlet of flash tank 4, preferably with let in the running water heat transfer of vacuum pump P-3 after the condensation get into in cooling water pitcher 7. In the utility model, the separation liquid is discharged from the bottom discharge port of the flash tank 4, preferably joins with the preheated desulfurization liquid through the concentration circulating pump P-2 to form a mixed liquid, a part of the mixed liquid enters the bottom feeding port of the concentrator 3 to be circularly concentrated, and in the process, the separation liquid formed by the flash tank 4 is used as the heating material of the concentrator 3 to maintain the boiling state of the feed liquid in the concentrator 3, so that the latent energy of the self heat of the system is recycled, and the supply of external steam is reduced; the other part of the mixed solution flows out from a concentrated medicament outlet 4-1.
As an embodiment of the utility model, the mixed liquid that flows out by concentrated medicine export 4-1 gets into concentrated medicine jar 6 and recycles in the complex iron desulfurization process as concentrated medicine, keeps circulating liquid concentration stable and satisfies the requirement of complex iron desulfurization process to concentrated medicine concentration.
As another embodiment of the present invention, when the desulfurization solution further contains a certain amount of sulfate and carbonate, the practical situation usually mainly includes potassium sulfate, and the present invention preferably will the mixed solution flowing out from the concentrated chemical agent outlet 4-1 enters the evaporative crystallizer 8 through the upper feeding port of the evaporative crystallizer 8. In the utility model, the evaporative crystallizer 8 is filled with external steam and secondary steam discharged from the flash tank 4 to evaporate and crystallize the mixed liquid to form a crystallization liquid; the external steam and the secondary steam are condensed and enter a condensed water tank 5; and discharging the crystallization liquid from a discharge port at the bottom of the evaporative crystallizer 8, discharging one part of the crystallization liquid from a circulation outlet of the crystallization liquid, preferably, feeding the crystallization liquid into the evaporative crystallizer 8 again through a crystallization circulating pump P-4 for circulation evaporative crystallization, and feeding the other part of the crystallization liquid from an outlet of the crystallization liquid into a centrifugal machine 9 for solid-liquid separation to form crystallized salt and a concentrated medicament, wherein the concentrated medicament is recovered in a complex iron desulfurization process. In the present invention, the process parameters of the evaporative crystallizer are preferably: vessel design/operating temperature: 80 ℃/60 ℃, vessel design/operating pressure: atmospheric pressure/atmospheric pressure, jacket design/operating temperature: 120 ℃/100 ℃, jacket design/operating pressure: atmospheric pressure/atmospheric pressure. In the crystallization evaporation process, the utility model discloses the steam source of the secondary steam that produces flash tank 4 as the crystallization makes the energy of system self obtain make full use of, has both retrieved the latent heat, has improved the thermal efficiency again.
Adopt the device provided by the utility model handles complex iron desulfurization sulphur thick liquid, can realize the recycle of desulfurization medicament in the complex iron desulfurization sulphur thick liquid to reduce desulfurization system's medicament supply, be favorable to maintaining desulfurization system water balance, and can realize the make full use of the energy, reduce the energy consumption. In addition, the potassium sulfate in the sulfur slurry can be crystallized and separated, and the condition that the recycled desulfurization agent contains the salt to cause system blockage in the recycling process and influence the desulfurization process is avoided.
The integrated complex iron desulfurization slurry treatment device provided by the present invention will be described in detail with reference to the following examples, which should not be construed as limiting the scope of the present invention.
Example 1
The integrated complex iron desulfurization sulfur slurry treatment device has a structure as shown in figure 1: in figure 1, 1-vacuum filter, 1-1-sulfur slurry inlet, 1-2-desalted water spray port, 1-3-desulfurized liquid outlet, 1-4-sulfur paste outlet, 2-raw material tank, 2-1-heater, 3-concentrator, 4-flash tank, 4-1-concentrated chemical outlet, 5-condensed water tank, 6-concentrated chemical tank, 7-cooling water tank, P-1-raw material pump, P-2-concentration circulating pump, P-3-vacuum pump.
The device shown in figure 1 is adopted to carry out integrated treatment on the complex iron desulfurization sulfur slurry, and the complex iron desulfurization sulfur slurry comprises the following main components: iron complex and potassium sulfate, and the treatment method comprises the following steps:
feeding the complex iron desulfurization sulfur slurry into a vacuum filter 1 from a sulfur slurry inlet 1-1, spraying desalted water into the vacuum filter 1 through a desalted water spraying port 1-2, cleaning the complex iron desulfurization sulfur slurry in the vacuum filter 1, forming sulfur paste and desulfurization liquid under the suction filtration action of the vacuum filter 1, and discharging the sulfur paste from a sulfur paste outlet 1-4;
the desulfurization solution enters a raw material tank 2 from a desulfurization solution outlet 1-3, and is preheated to the saturation temperature (80 ℃) under the evaporation pressure in the raw material tank 2 by a heater 2-1;
the preheated desulfurization solution enters a concentrator 3 from a raw material pump P-1, steam is introduced into the concentrator 3 to heat the desulfurization solution entering the concentrator 3 (at the temperature of 80 ℃), the desulfurization solution is heated to form a gas-liquid mixture, and the steam is condensed into water to enter a condensate water tank 5;
the gas-liquid mixture enters a flash tank 4 (the temperature is 80 ℃, and the pressure is 80kPa) for gas-liquid separation to form separated liquid and secondary steam; the separation liquid is discharged from a bottom discharge hole of a flash tank 4, and is converged with the preheated desulfurization liquid by a concentration circulating pump P-2 to form a mixed liquid, one part of the mixed liquid enters a bottom feed inlet of a concentrator 3 for circulating concentration, and the other part of the mixed liquid enters a concentrated medicament tank 6 from a concentrated medicament outlet 4-1 to be used as a concentrated medicament (the medicament concentration is the same as the original desulfurization medicament concentration used by the complex iron desulfurization system) for the complex iron desulfurization process; the secondary steam is discharged from a top gas outlet of the flash tank 4, exchanges heat with tap water introduced into the vacuum pump P-3, and is condensed into the cooling water tank 7.
Example 2
The integrated complex iron desulfurization sulfur slurry treatment device has a structure as shown in figure 1: in figure 1, 1-vacuum filter, 1-1-sulfur slurry inlet, 1-2-desalted water spray port, 1-3-desulfurized liquid outlet, 1-4-sulfur paste outlet, 2-raw material tank, 2-1-heater, 3-concentrator, 4-flash tank, 4-1-concentrated chemical outlet, 5-condensate water tank, 7-cooling water tank, 8-evaporative crystallizer, 9-centrifuge, P-1-raw material pump, P-2-concentration circulating pump, P-3-vacuum pump, P-4-crystallization circulating pump.
The device shown in figure 1 is adopted to carry out integrated treatment on the complex iron desulfurization sulfur slurry, and the complex iron desulfurization sulfur slurry comprises the following main components: iron complex and potassium sulfate, and the treatment method comprises the following steps:
feeding the complex iron desulfurization sulfur slurry into a vacuum filter 1 from a sulfur slurry inlet 1-1, spraying desalted water into the vacuum filter 1 through a desalted water spraying port 1-2, cleaning the complex iron desulfurization sulfur slurry in the vacuum filter 1, forming sulfur paste and desulfurization liquid under the suction filtration action of the vacuum filter 1, and discharging the sulfur paste from a sulfur paste outlet 1-4;
the desulfurization solution enters a raw material tank 2 from a desulfurization solution outlet 1-3, and is preheated to the saturation temperature (80 ℃) under the evaporation pressure in the raw material tank 2 by a heater 2-1;
the preheated desulfurization solution enters a concentrator 3 through a raw material pump P-1, steam is introduced into the concentrator 3 to heat the desulfurization solution entering the concentrator 3 (at the temperature of 80 ℃), the desulfurization solution is heated to form a gas-liquid mixture, and the steam is condensed into water to enter a condensate water tank 5;
the gas-liquid mixture enters a flash tank 4 (the temperature is 80 ℃, and the pressure is 80kPa) for gas-liquid separation to form separated liquid and secondary steam; wherein, the secondary steam is discharged from a top gas outlet of the flash tank 4, exchanges heat with tap water introduced into the vacuum pump P-3 and then enters the cooling water tank 7; the separated liquid is discharged from a discharge port at the bottom of the flash tank 4, and is converged with the preheated desulfurization liquid by a concentration circulating pump P-2 to form a mixed liquid, one part of the mixed liquid enters a feed port at the bottom of the concentrator 3 for cyclic concentration, the other part of the mixed liquid flows out from a concentrated chemical agent outlet 4-1 and enters an evaporative crystallizer 8 from a feed port at the upper part of the evaporative crystallizer 8, external steam is introduced into the evaporative crystallizer 8, and secondary steam discharged from the flash tank 4 is used for evaporative crystallization (at the temperature of 80 ℃) of the mixed liquid to form a crystallization liquid; condensing the external steam and the secondary steam into a condensed water tank 5; the crystallized liquid is discharged from a discharge port at the bottom of the evaporative crystallizer 8, one part of the crystallized liquid enters the evaporative crystallizer 8 again through a crystallized liquid circulating outlet via a crystallization circulating pump P-4 for circulating evaporative crystallization, the other part of the crystallized liquid enters a centrifuge 9 from a crystallized liquid outlet for solid-liquid separation to form crystallized salt and a concentrated medicament, wherein the concentrated medicament (the concentration of which reaches 1.4 times of the original medicament) is recycled in the complex iron desulfurization process (the concentrated medicament can be diluted by adding water and pumped back to the complex iron desulfurization system).
It can be seen from the above embodiments that, the device provided by the utility model is adopted to carry out integrated treatment on the complex iron desulfurization sulfur slurry, and the recycling of the desulfurization agent in the complex iron desulfurization sulfur slurry can be realized, thereby reducing the agent supply of the desulfurization system, being beneficial to maintaining the water balance of the desulfurization system, and realizing the full utilization of energy and reducing the energy consumption; the potassium sulfate in the sulfur slurry can be crystallized and separated, and the condition that the desulfurization agent obtained by recovery contains the salt, so that the system is blocked in the recycling process and the desulfurization process is influenced is avoided.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of 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 (8)
1. The integrated complex iron desulfurization sulfur slurry treatment device is characterized by comprising a sulfur slurry cleaning desulfurization system and a desulfurization solution concentration system;
the sulfur slurry cleaning and desulfurizing system comprises:
the device comprises a vacuum filter (1), wherein the vacuum filter (1) is provided with a sulfur slurry inlet (1-1), a desalted water spraying port (1-2), a desulfurized liquid outlet (1-3) and a sulfur paste outlet (1-4);
the doctor solution concentrating system comprises:
a raw material tank (2) with a feeding port communicated with the doctor solution outlet (1-3), wherein a heater (2-1) is arranged in the raw material tank (2);
the concentrator (3) is communicated with the outlet of the raw material tank (2) through a bottom feeding port, and the concentrator (3) is also provided with a heating steam inlet, a steam condensation outlet and a top discharge port; the steam condensation outlet is communicated with the inlet of the condensation water tank (5);
the flash tank (4) is communicated with the feed inlet and the top discharge port of the concentrator (3), and the flash tank (4) is provided with a top gas outlet and a bottom discharge port; a bottom discharge port pipeline of the flash tank (4) is converged with a bottom feed port pipeline of the concentrator (3), and the converged pipeline is also provided with a concentrated chemical outlet (4-1);
and the inlet of the cooling water tank (7) is communicated with the top gas outlet of the flash tank (4).
2. The integrated complex iron desulfurization sulfur slurry treatment device according to claim 1, wherein the concentrator (3) is a rising-film tube array concentrator, a falling-film tube array concentrator, a horizontal shell-and-tube concentrator or a plate concentrator.
3. The integrated complex iron desulfurization sulfur slurry treatment device according to claim 1, characterized in that a raw material pump (P-1) is arranged on the outlet pipeline of the raw material tank (2); a concentration circulating pump (P-2) is arranged on a bottom discharge port pipeline of the flash tank (4); and a vacuum pump (P-3) is arranged on an inlet pipeline of the cooling water tank (7).
4. The integrated complex iron desulfurization sulfur slurry treatment device according to claim 3, wherein the bottom discharge line of the flash tank (4) and the outlet line of the concentration circulating pump (P-2) are further connected through an additional first line (L-1).
5. The integrated complex iron desulfurization sulfur slurry treatment device according to claim 1, wherein the concentrated agent outlet (4-1) is communicated with the inlet of the concentrated agent tank (6);
or the concentrated medicine outlet (4-1) is communicated with an evaporative crystallization system; the evaporative crystallization system comprises: the secondary steam inlet is communicated with the top gas outlet of the flash tank (4) to form an evaporation crystallizer (8); the evaporation crystallizer (8) is also provided with an external steam inlet, a steam condensation outlet, an upper feeding port and a bottom discharging port; a feeding port at the upper part of the evaporation crystallizer (8) is communicated with a concentrated medicament outlet (4-1); a discharge port at the bottom of the evaporative crystallizer (8) is branched into a crystallization liquid outlet and a crystallization liquid circulating outlet, the crystallization liquid circulating outlet is communicated with a feeding port at the upper part of the evaporative crystallizer (8), and the crystallization liquid outlet is connected to a centrifuge (9); and a steam condensation outlet of the evaporation crystallizer (8) is communicated with an inlet of the condensed water tank (5).
6. The integrated complex iron desulfurization sulfur slurry treatment device according to claim 5, characterized in that an agitator is arranged inside the evaporative crystallizer (8).
7. The integrated complex iron desulfurization sulfur slurry treatment device according to claim 5 or 6, wherein a crystallization circulating pump (P-4) is arranged on a crystallization liquid circulating outlet pipeline of the evaporative crystallizer (8).
8. The integrated complex iron desulfurization sulfur slurry treatment device according to claim 7, wherein the bottom discharge line of the evaporative crystallizer (8) and the outlet line of the crystallization circulation pump (P-4) are further connected by an additional second line (L-2).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250087A (en) * | 2021-12-29 | 2022-03-29 | 临涣焦化股份有限公司 | Coke oven gas complex iron pre-cooling pretreatment system and method before desulfurization |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250087A (en) * | 2021-12-29 | 2022-03-29 | 临涣焦化股份有限公司 | Coke oven gas complex iron pre-cooling pretreatment system and method before desulfurization |
| CN114250087B (en) * | 2021-12-29 | 2023-10-03 | 临涣焦化股份有限公司 | Coke oven gas complex iron pre-desulfurization cooling pretreatment system and method |
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Effective date of registration: 20221230 Address after: 100027 Chaoyangmen North Street, Chaoyang District, Chaoyang District, Beijing Patentee after: SINOPEC Group Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC PETROLEUM ENGINEERING Corp. Address before: 100020 Building 2, Chaoyang Gate office area, Sinopec, 9 jishikou Road, Chaoyang District, Beijing Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: SINOPEC PETROLEUM ENGINEERING Corp. |
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