CN108178130A - A kind of continuous sulfur melting system and method - Google Patents
A kind of continuous sulfur melting system and method Download PDFInfo
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- CN108178130A CN108178130A CN201810063712.6A CN201810063712A CN108178130A CN 108178130 A CN108178130 A CN 108178130A CN 201810063712 A CN201810063712 A CN 201810063712A CN 108178130 A CN108178130 A CN 108178130A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/027—Recovery of sulfur from material containing elemental sulfur, e.g. luxmasses or sulfur containing ores; Purification of the recovered sulfur
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Abstract
The present invention discloses a kind of continuous sulfur melting system and method.The system includes：Sulphur foam tank, backwash filter, surge tank and sulfur melting kettle；Sulphur foam tank includes sulphur foam solution entrance and sulphur foam solution exports；The inner cavity of backwash filter is divided into epicoele and cavity of resorption by partition board, and cavity of resorption is equipped with sulphur foam solution entrance and backwash dope exports, and epicoele is exported equipped with the first doctor solution；Surge tank includes backwash dope entrance and buffer solution exports；Sulfur melting kettle includes buffer inlet, sulphur outlet and the outlet of the second doctor solution；The sulphur foam solution entrance of the sulphur foam solution outlet connection backwash filter of sulphur foam tank, the backwash dope entrance of the backwash dope outlet connection surge tank of backwash filter, the buffer inlet of the buffer solution outlet connection sulfur melting kettle of surge tank.For the system of the present invention, it can be achieved that continuous production, filtering accuracy is high, sulfur content is low in doctor solution, can reduce secondary salt production quantity.
Description
Technical field
The invention belongs to sulphur waste disposal technical field more particularly to a kind of continuous sulfur melting system and methods.
Background technology
There are many kinds of the separation and recovery methods for using wet oxidation desulfurization technique sulphur foam at present, and sulphur foam fraction factor is returned
Harvest sulphur can be divided into interval sulfur-melting technology and continuous sulfur melting technique.
Interval sulfur-melting technology is that the sulphur foam for first regenerating desulphurization system is collected to sulphur foam tank, then added by steam
After Grape berry concentrate, sulphur cream is filtered by centrifuge or vacuum filter, crosses cleaner liquid return system, sulphur cream is intermittently added
Interval sulfur melting kettle is melt into sulphur, and raffinate is recycled to system after molten sulphur.The method advantage is：Molten sulphur efficiency is high, filters generation
Clear liquid sulphur containing suspension 0.5% or so reduces the probability that suspension sulphur blocks desulfurizing tower and miscellaneous equipment, improves gas-liquid mass transfer effect
Rate and desulfurization effect.The sulphur cream water content of production is low, and processing is melt into that sulphur steam consumption is low, while the raffinate amount that molten sulphur generates
Seldom, secondary salt production quantity is few, recycles back small to systematic influence after system, ensure that the process conditions of desulfurization, reduces environment dirt
Dye, environment protecting are notable.The method shortcoming is：Equipment is complicated, and repair and maintenance is difficult, and one-time investment is big, and the heating of sulphur foam is pre-
It is big to handle concentrate consumption quantity of steam, since this method operates intermittent duty, using manual operation and transhipment sulphur cream, labor intensity is big,
Field environmental condition is severe.In addition this technique separation equipment is arranged on 3 to 4 story frame structures, melts sulphur workshop height, load weight,
Civil engineering structure is costly.
Continuous sulfur melting technique is that the sulphur foam for first regenerating desulphurization system is collected to sulphur foam tank, passes through centrifugal pump
Direct weighting is sent into continuous sulfur melting kettle, using steam indirectly heat, sulphur is made to be layered after melting with clear liquid.Discharge liquor (raffinate) is again
Desulphurization system is returned after the saponification process that cools down.The method advantage is：Continuous sulfur melting kettle is done on original interval sulfur-melting technology
Some improvement have sulphur foam continuously separation and molten sulfur functional, and sulphuring treatment ability is big, the method is simple for process, and equipment is few, and one
Secondary property investment is low, and continuous operation site environment is good.The method shortcoming is：The relatively low sulphur foam solution of sulfur content all adds in continuous molten
In sulphur kettle, go out kettle clear liquid (raffinate) amount greatly, temperature is high, and recycling clear liquid (raffinate) must be cooled to room temperature, waste a large amount of steam
With part cooling water；Content of suspension sulfur contained by the clear liquid of return system is high, while particle has been heated to be ripe sulfur granules, is regenerating
Sulphur foam, easily occluding device and inner-tower filling material can not be re-formed in device.The clear liquid of return system is by high-temperature heating, and generation is greatly
Secondary salt is measured, causes system alkaline consumption high, secondary salt is constantly accumulated, and sulfur removal technology is caused to deteriorate, seriously corroded has to replace to the end
Doctor solution is discharged, doctor solution processing is difficult, be easy to cause environmental pollution.
Invention content
To solve the above-mentioned problems, the present invention proposes a kind of continuous sulfur melting system and method, employs new technique with setting
It is standby, the problem of production cannot continuously be filtered by solving interval sulfur-melting technology, and labor intensity is big, and field environmental condition is severe；Simultaneously
It solves the problems, such as that continuous sulfur melting technique is not energy-efficient, not environmentally, that is, solves big, the temperature that recycles clear liquid amount in continuous sulfur melting technique
The problem of height, content of suspension sulfur is high, and desulphurization system secondary salt is high, and alkaline consumption is high.
An object of the present invention is to provide a kind of continuous sulfur melting system, including：Sulphur foam tank, delays backwash filter
Rush tank and sulfur melting kettle；
The sulphur foam tank includes sulphur foam solution entrance and sulphur foam solution exports；
The inner cavity of the backwash filter is divided into epicoele and cavity of resorption by partition board, and the upper intracavitary is equipped with more filter cores；
The filter core is fixed on the partition board, is exported including turbid entrance and cleaning solution；The turbid entrance of the filter core with it is described under
Chamber connects；The cavity of resorption is equipped with sulphur foam solution entrance and backwash dope exports, and the epicoele is exported equipped with the first doctor solution；It is described
Lower intracavitary is equipped with rotatable rotating arm, during backwash, the turbid entrance of filter core described in one end connected component of the rotating arm,
The other end connects the backwash dope outlet；
The surge tank includes backwash dope entrance and buffer solution exports；
The sulfur melting kettle includes buffer inlet, sulphur outlet and the outlet of the second doctor solution；
The sulphur foam solution outlet of the sulphur foam tank connects the sulphur foam solution entrance of the backwash filter, the recoil
The backwash dope outlet for washing filter connects the backwash dope entrance of the surge tank, the buffer solution outlet connection of the surge tank
The buffer inlet of the sulfur melting kettle.
In some embodiments of the present invention, blender is installed in the sulphur foam tank.
In some embodiments of the present invention, sulphur foam pump, institute are equipped between the sulphur foam tank and backwash filter
The sulphur foam solution for stating the input end connection sulphur foam tank of sulphur foam pump exports, described in the port of export connection of the sulphur foam pump
The sulphur foam solution entrance of backwash filter.
In some embodiments of the present invention, the backwash filter is equipped with motor, and the motor drives the rotation
Arm rotates.
In some embodiments of the present invention, the surge tank is equipped with compressed air inlet.
In some embodiments of the present invention, heat exchanger is equipped in the sulfur melting kettle, the heat exchanger includes low temperature buffer liquid
Entrance, the outlet of high-temperature buffer liquid, high temperature desulfurizing liquid entrance and the outlet of low-temp desulfurization liquid, the buffer inlet connection of the sulfur melting kettle
The low temperature buffer liquid entrance, the second doctor solution outlet of the continuous sulfur melting kettle in low-temp desulfurization liquid outlet.
It is a further object of the present invention to provide it is a kind of using above-mentioned continuous sulfur melting system processing sulphur foam method, including with
Lower step：
A, desulphurization system is regenerated to the sulphur foam solution come collect to sulphur foam tank；
B, the sulphur foam solution for collecting the sulphur foam tank is sent into the cavity of resorption of backwash filter, and sulphur foam solution is by under described
Chamber enters filter core and is filtered, and the sulfur granules object in the sulphur foam solution precipitates in the filter core and forms filter cake, cleaning solution into
Enter the epicoele of the backwash filter, exported and discharged by the first doctor solution；
C, when reaching preset condition, rotating arm, which is rotated to the part filter core, to be connected, the cleaning solution of the upper intracavitary
The filter core is entered by the cleaning solution outlet of filter core, the sulfur granules object of precipitation is rinsed, forms backwash dope, it is described anti-
It washes dope and the backwash filter is discharged by the rotating arm；
D, after completing backwash, the rotating arm, which is rotated to other filter cores, to be connected, it is backwashed；
E, backwash dope feeding surge tank is stored, forms buffer solution；
F, the buffer solution is sent into sulfur melting kettle, the sulfur granules after being heated in buffer solution sink to forming sulphur, on doctor solution
It rises to be exported by the second doctor solution and discharge.
As preferred embodiments of the present invention, in the step A, after sulphur foam solution enters the sulphur foam tank, by blender
The sulphur foam solution is uniformly mixed.
As preferred embodiments of the present invention, in the step E, compressed air is passed through to the surge tank, to buffer solution into
Row agitation.
As preferred embodiments of the present invention, in step F, after the buffer solution enters the sulfur melting kettle, in heat exchanger with
The doctor solution exchanges heat.
The continuous sulfur melting system and method for the present invention filters sulphur foam by backwash filter, and filtering accuracy is high, filtering
Content of suspension sulfur is far below traditional handicraft in cleaning solution afterwards；The concentration of backwash dope is high, substantially reduces the desulfurization of sulfur melting kettle discharge
Liquid；By the heat exchange of buffer solution and doctor solution, the thermal losses of sulfur melting kettle is reduced；The reduction of doctor solution to enter and subsequently exist
The secondary salt amount generated in desulphurization system substantially reduces.
Description of the drawings
Fig. 1 is the system construction drawing of the embodiment of the present invention.
Specific embodiment
Below in conjunction with drawings and examples, the specific embodiment of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and implementation
Example is for illustrative purposes only rather than limitation of the present invention.
Heretofore described " connection " unless otherwise specific regulation or limits, should broadly understood, can be direct
It is connected or is connected by intermediary.In the description of the present invention, it is to be understood that " on ", " under ", " preceding ",
The orientation or position relationship of the instructions such as " rear ", "left", "right", " top ", " bottom end " are based on orientation shown in the drawings or position
Relationship is for only for ease of the description present invention and simplifies description rather than instruction or imply that signified device or element must have
There is specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
As shown in Figure 1, the present embodiment provides a kind of continuous sulfur melting system, including：Sulphur foam tank 1, backwash filter 2,
Surge tank 3 and sulfur melting kettle 4.The system of the present embodiment can be as the separation and recovery of sulphur foam in wet oxidation process gas sweetening systems
System.Wet oxidation process refers to the method that hydrogen sulfide is oxidized to elementary sulfur in liquid phase (sig water).
Sulphur foam tank 1 is the collection device of sulphur foam, is exported including sulphur foam solution entrance and sulphur foam solution, wet oxidation process
Desulphurization system regenerates the sulphur foam (sulfur-bearing mass percent 3% or so) come and is all collected in sulphur foam tank 1.Preferably,
Blender 11 is installed, blender 11 can be spiral agitator, and the sulphur foam solution in sulphur foam tank 1 is stirred in sulphur foam tank 1
It mixes uniformly.
Backwash filter 2 is equipped with the inner cavity of closing, and inner cavity is divided into epicoele 21 and cavity of resorption 22 by partition board.In epicoele 22
Equipped with more filter cores 23, filter core 23 can be fixed on partition board.Filter core 23 can be filtered sulphur foam solution, including turbid entrance and
Cleaning solution exports, and the turbid entrance of filter core 23 is connected with cavity of resorption 22.Cavity of resorption 22 is equipped with sulphur foam solution entrance and backwash dope exports,
Epicoele 21 is exported equipped with the first doctor solution.The sulphur foam solution of the sulphur foam solution outlet connection backwash filter 2 of sulphur foam tank 1 enters
Mouthful.The sulphur foam solution of sulphur foam tank 1 enters the cavity of resorption 22 of backwash filter, turbid mouth and the cavity of resorption 22 of filter core 23 by pipeline
Connection, sulphur foam solution enter filter core 23 and are filtered.
Sulphur foam solution from bottom to top, from inside to outside by filter core 23, sulfur granules object is deposited on filter core 23 in sulphur foam solution
Slippery inner surface deposits, and forms filter cake, and the cleaning solution after filtering enters epicoele 21, is gone out as filtering doctor solution by the first doctor solution
Mouth discharge backwash filter 2.Filtering doctor solution can be recycled to desulphurization system by self-draining valve 28.Due to filtering accuracy
Height, cleaning solution content of suspension sulfur≤20mg/L (mass percent 0.002%) after filtering, well below traditional handicraft.
Rotatable rotating arm 24 is equipped in cavity of resorption 22,24 internal run-through of rotating arm when filter core 23 need to backwash, will revolve
One end of pivoted arm 24, which is rotated to the turbid entrance with filter core 23, to be connected, the other end connection backwash dope outlet of rotating arm 24.By
When the effect of pressure difference, backwash, the cleaning solution ecto-entad in epicoele 21 enters filter core 23, the sulphur that will be deposited in filter core 23
Grain rinses, and forms backwash dope (sulfur-bearing mass percent is up to 35% or so), is exported and discharged by backwash dope.Backwash
When, rotating arm 24 is only connected with part filter core 23, the filter core not connected with rotating arm 24, throws away and sulphur foam also can be carried out
Filter.For example, in this implementation, there are four filter cores, rotating arm 24 can only be connected with a filter core and be backwashed, other three filter cores
It can still be filtered, not influence the continuity of filtering.
Preferably, backwash filter is equipped with motor 25, and motor 25 can drive rotating arm 24 to rotate.Backwash control is single
Member 26 is used for, and the flow of backwash is controlled to carry out automatically, predeterminable certain condition in control unit 26 is backwashed so that anti-
It rinses and starts, certain value is such as reached according to the inside and outside differential pressure of filter core 23 or filtration time reaches (such as 30 points of certain duration
Clock).The backwash filter 2 of the present embodiment is equipped with pressure difference transmitter 27, for the inside and outside differential pressure of monitoring filtering element 23, with sulphur
The deposition of particle, when pressure difference reaches 0.15MPa, backwash control unit 26 control rotating arm 24 rotation to corresponding filter core
Connection, is backwashed.
In the present embodiment, sulphur foam pump 12 is equipped between sulphur foam tank 1 and backwash filter 2, sulphur foam pump 12
The sulphur foam solution outlet of input end connection sulphur foam tank 1, the sulphur foam of the port of export connection backwash filter 2 of sulphur foam pump 12
Liquid entrance.Sulphur foam solution can be forced into 0.7MPa (G) by sulphur foam pump 12, be sent into backwash filter 2 later.
In order to achieve the purpose that filter out sulfur granules in sulphur foam solution, powder of stainless steel sintering or macromolecule can be used in filter core 23
Agglomerated material makes.It, can be effectively catching, solid particles in filter element by controlling the appropriate flow of unit filter area
Inner surface, form equally distributed filter cake.Powder of stainless steel is sintered or effective filtering accuracy of sinterable polymer material filter element
Up to submicron order, 0.1 μm of filtering precision, monomer sulfur granules substantially belong to submicron order.It is taken off in wet oxidation process gas
In sulphur system, the monomer sulfur granules president that doctor solution oxidation regeneration is formed obtains thicker, and fine grained can be gathered into thicker automatically
Grain, for the grain size overwhelming majority at 5~10 μm, average resistivity belongs to material more difficult to filter.According to such characteristic, using stainless steel
Powder sintered or sinterable polymer material filter element, filter efficiency can reach 99.9%, can effectively filter the sulphur in sulphur foam solution
The characteristics of particle, backwash filter 2 be can with automatic backwash, can also automatically control with manual compatibility mode, can not between
Sulphur foam solution is filtered disconnectedly.
Surge tank 3 is the storage device of recoil dope, is exported including backwash dope entrance and buffer solution, backwash filter
The backwash dope entrance of 2 backwash dope outlet connection surge tank 3, the backwash dope of discharge backwash filter 2 enter buffering
Tank 3 forms buffer solution.Backwash dope entrance in the backwash dope outlet of backwash filter 2 and surge tank 3 is equipped with control valve
29, the backwash dope as backwash filter 2 switchs.
Preferably, level position transducer 31 is equipped in surge tank 3, for monitoring the inventory in surge tank 3, such as to monitoring
When material position is less than certain value in surge tank 3, system can be stopped.
Surge tank 3 is equipped with compressed air inlet and gas vent, and compressed air inlet is communicated with pressure maintaining valve 32, pressure maintaining valve
32 controllable compressed airs enter in surge tank 3, and gas vent is communicated with air diffusion valve 33, control the discharge of gas.It is passed through
On the one hand compressed air can carry out air agitation to backwash dope, prevent buffer solution from depositing；Another aspect and surge tank top
Air diffusion valve 33 be combined, the pressure of surge tank 3 is adjusted by pressure transmitter 34, make its stablize at 0.5MPa (G)
Left and right.
Since backwash dope is according to the pressure differential of 2 filter core of backwash filter or predetermined time interruption discharge, pass through
Surge tank 3, so that it may realize continuous conveying.The setting of 31 height of volume and level position transducer of surge tank 3 is according to interruption row
Enter the liquid measure of backwash dope and the liquid measure of time difference and continuous discharge buffer solution come it is determining, it is ensured that can realize that continuous-stable is defeated
It send.
Sulfur melting kettle 4 includes buffer inlet, sulphur outlet and the outlet of the second doctor solution, and the buffer solution outlet of surge tank 3 connects
Connect the buffer inlet of sulfur melting kettle 4.Buffer solution through voltage stabilizing is continuously sent to sulfur melting kettle 4.
The outer layer of sulfur melting kettle 4 is heating jacket 41, for the heating to 4 inner cavity of sulfur melting kettle.Heating jacket 41 is connected with certainly
Dynamic steam adds in valve 44 and drain valve 45, and lower part is equipped with temperature transmitter 46.Temperature transmitter 46 can monitor the temperature in sulfur melting kettle 4
Degree adds in valve 44 (controlled at 145 DEG C), by automatic steam and adds in steam, it can be achieved that molten sulphur to sulfur melting kettle heating jacket 41
Temperature automatic control in kettle 4, steam condensate (SC) discharge chuck by drain valve 45.
Buffer solution is heated after entering sulfur melting kettle 4, and sulfur granules therein are gradually built up because of the downward precipitation of density weight, are melted in lower part
Sulphur discharge sulfur melting kettle 4 is melt into, the sulphur of discharge is put into sulphur mold 5, becomes blocky sulphur after cooling.Buffer solution after heated
In doctor solution gently flowed up by separator in sulfur melting kettle 42 because of density, pass through the second doctor solution outlet discharge, return
Desulphurization system.
In the present embodiment, heat exchanger 43 is equipped in sulfur melting kettle, heat exchanger 43 includes low temperature buffer liquid entrance, high-temperature buffer liquid
Outlet, high temperature desulfurizing liquid entrance and the outlet of low-temp desulfurization liquid, the buffer inlet connection low temperature buffer liquid entrance of sulfur melting kettle, low temperature
The second doctor solution outlet of doctor solution outlet continuous sulfur melting kettle.It may be such that and the buffer solution of sulfur melting kettle 4 is flowed into heat exchanger by top
It is preheated in 43.In sulfur melting kettle 4, the high temperature desulfurizing liquid that lower part rises after being heated enters heat exchanger 43, with low temperature buffer liquid
It exchanges heat, the high-temperature buffer liquid after preheating continues to flow downward, and the low-temp desulfurization liquid after heat exchange is gone out by the second doctor solution
Mouth discharge returns to desulfurization tradition, temperature≤65 DEG C of low-temp desulfurization liquid.
Compared with traditional continuous sulfur melting kettle, novel multitubular heat exchanger is employed inside sulfur melting kettle 4 in the present invention, is increased
Internal heat transfer surface area improves heat transfer efficiency.316 stainless steel materials of use of heat exchanger 43, retractable, service life are long.
The doctor solution temperature of discharge sulfur melting kettle 4 can be down to 65 DEG C hereinafter, reduce 15 DEG C or more than traditional continuous sulfur melting kettle, greatly reduce
Steam consumption.
It is a further object of the present invention to provide it is a kind of using above-mentioned continuous sulfur melting system processing sulphur foam method, including with
Lower step：
The 1st, desulphurization system is regenerated to the sulphur foam solution come collect to sulphur foam tank；After sulphur foam solution enters sulphur foam tank,
Sulphur foam solution is uniformly mixed by blender.
2nd, the sulphur foam solution for collecting sulphur foam tank is sent into the cavity of resorption of backwash filter, and sulphur foam solution enters filter by cavity of resorption
Core is filtered, and the sulfur granules object in sulphur foam solution precipitates in filter core forms filter cake, and cleaning solution enters backwash filter
Epicoele forms filtering doctor solution, is exported and discharged by the first doctor solution.
3rd, when reaching preset condition, rotating arm, which is rotated to part filter core, to be connected, and the cleaning solution of upper intracavitary passes through filter core
Cleaning solution outlet enter filter core, the sulfur granules object of precipitation is rinsed, formation backwash dope, backwash dope passes through rotating arm
Discharge backwash filter.
4th, after completing backwash, rotating arm, which is rotated to other filter cores, to be connected, it is backwashed.
5th, backwash dope feeding surge tank is stored, forms buffer solution；Compressed air is passed through to surge tank, to buffering
Liquid is stirred.
6th, buffer solution is sent into sulfur melting kettle, buffer solution enters after sulfur melting kettle to be changed in heat exchanger with molten sulphur doctor solution
Heat；Buffer solution after preheating continues downwards, to be heated by steam, and the sulfur granules in heated rear buffer solution sink to forming sulphur, melt sulphur
Doctor solution ascends into heat exchanger and exchanges heat, and the molten sulphur doctor solution after heat exchange is exported by the second doctor solution and discharged.
The system and method for the present invention are, it can be achieved that the continuous production of sulphur, filtering accuracy is high, suspends in cleaning solution after filtering
Sulfur content≤20mg/L (mass percent 0.002%), well below traditional handicraft.It is dense that filtering can continuously discharge high concentration backwash
Liquid (wherein sulfur-bearing mass ratio 35% or so) to sulfur melting kettle carries out molten sulphur.Relative to traditional handicraft, sulfur melting kettle of the invention discharge
Doctor solution (raffinate) amount reduce 90%, temperature reduces 15 DEG C or more, relative to traditional sulfur-melting technology recycle unit sulphur
(1kg) steam consumption can be kept to 0.3kg or so by 2.5~3.5kg, reduce more than 85%.Simultaneously because secondary salt production quantity is big
Big to reduce, subsequent desulphurization system alkaline consumption can reduce more than 60%, and substantially without discharging of waste liquid, desulfurization process conditions are stablized, and reduce
Desulfurizing tower blocks up the probability of tower.In addition, the present invention, using Automatic Control, operating automation degree is high, and equipment can be arranged all
In ground or individual layer plane, civil engineering structure expense is low.
Embodiment 1
Using the technique of the present invention, sulphur foam is handled, obtains 1000kg sulphur, flow is as follows：
The 1st, desulphurization system is regenerated to the sulphur foam solution come collect to sulphur foam tank, sulphur foam solution sulfur-bearing mass percent
3%；After sulphur foam solution enters sulphur foam tank, sulphur foam solution is uniformly mixed by blender.
2nd, the sulphur foam solution for collecting sulphur foam tank is sent into the cavity of resorption of backwash filter, and sulphur foam solution enters filter by cavity of resorption
Core is filtered, and the sulfur granules object in sulphur foam solution precipitates in filter core forms filter cake, and cleaning solution enters backwash filter
Epicoele is exported by the first doctor solution and discharged, and returns to desulphurization system, and sulfur content is 0.002% in the doctor solution of filtering.
3rd, when reaching preset condition, rotating arm, which is rotated to part filter core, to be connected, and the cleaning solution of upper intracavitary passes through filter core
Cleaning solution outlet enter filter core, the sulfur granules object of precipitation is rinsed, formation backwash dope, backwash dope passes through rotating arm
Discharge backwash filter.
4th, after completing backwash, rotating arm, which is rotated to other filter cores, to be connected, it is backwashed.
5th, backwash dope feeding surge tank is stored, forms buffer solution；Compressed air is passed through to surge tank, to buffering
Liquid is stirred.
6th, buffer solution is sent into sulfur melting kettle, buffer solution exchanges heat after entering sulfur melting kettle in heat exchanger with doctor solution；In advance
Buffer solution after heat continues downwards, to be heated by steam, and the sulfur granules in heated rear buffer solution sink to forming sulphur, melt sulphur doctor solution
It ascends into heat exchanger to exchange heat, the molten sulphur doctor solution after heat exchange is exported by the second doctor solution and discharged, and returns to desulphurization system.
The present embodiment obtains 1000kg sulphur, handles the sulphur foam solution 33667.86kg of mass ratio 3%.Obtained filtration and desulphurization
Liquid 30783.8kg, sulfur content 0.002%.Sulfur melting kettle consumes steam 292.79kg, obtains molten sulphur doctor solution 1884.06kg, contains
Sulfur content 0.5%, 65 DEG C of temperature.The sulfur granules of shared about 10.04kg return desulphurization system, wherein, filtering doctor solution sulfur-bearing is about
0.62kg melts sulphur doctor solution sulfur-bearing about 9.42kg.
Comparative example 1
Sulphur foam is handled by indirect sulfur-melting technology, obtains 1000kg sulphur, flow is as follows：
The 1st, desulphurization system is regenerated to the sulphur foam solution come collect to sulphur foam tank, sulphur foam solution sulfur-bearing mass percent
3%.
2nd, sulphur foam solution obtains pretreatment desulfurizing liquid, pretreatment sulphur foam is sent by steam pre-add Grape berry concentrate
Stirring.
3rd, sulphur foam solution obtains filtering doctor solution and dense sulphur foam by being filtered after stirring into vacuum filter.
4th, dense sulphur foam is intermittently added interval sulfur melting kettle and is melt into sulphur, and doctor solution is recycled to system after molten sulphur.
Comparative example 1 obtains 1000kg sulphur, handles the sulphur foam solution 39800.01kg of mass ratio 3%.It is de- to obtain pretreatment
Sulphur liquid and the filtering common 37789.91kg of doctor solution, sulfur content 0.5%.Sulfur melting kettle consumes steam 3375.06kg, obtains molten sulphur and takes off
Sulphur liquid 1010.10kg, sulfur content 0.5%, 145 DEG C of temperature.The sulfur granules of shared about 194kg return desulphurization system, wherein, in advance
Doctor solution and filtering doctor solution sulfur-bearing about 188.95kg are handled, melts sulphur doctor solution sulfur-bearing about 5.05kg.
Comparative example 2
By continuous sulfur melting process sulphur foam, 1000kg sulphur is obtained, flow is as follows：
The 1st, desulphurization system is first regenerated to the sulphur foam solution come collect to sulphur foam tank, sulphur foam solution sulfur-bearing mass percent
3%.
2nd, sulphur foam solution obtains pretreatment desulfurizing liquid by steam pre-add Grape berry.
3rd, the liquid after being preheated by centrifugal pump direct weighting, send into continuous sulfur melting kettle, using steam indirectly heat, makes
It is layered after sulphur melting with clear liquid, obtains sulphur and molten sulphur doctor solution.
Comparative example 2 obtains 1000kg sulphur, handles the sulphur foam solution 40663.82kg of mass ratio 3%.
Obtain pretreatment desulfurizing liquid 18072.9kg, sulfur content 0.5%.Sulfur melting kettle consumes steam 2731.78kg, obtains
Molten sulphur doctor solution 21590.91kg, sulfur content 0.6%, 80 DEG C of temperature.The sulfur granules of shared about 219.9kg return desulfurization system
System, wherein, pretreatment desulfurizing liquid sulfur-bearing about 90.36kg melts sulphur doctor solution sulfur-bearing about 129.55kg.
It can be obtained by comparison, technique of the invention is relative to comparative example 1, it can be achieved that continuous sulfur melting, is filtered in doctor solution
Sulfur content is extremely low, melt sulphur when, steam consumption is small, and equipment is simple, can individual layer horizontal layout, reduce civil engineering costs.
The technique of the present invention greatly reduces the discharge rate of molten sulphur doctor solution relative to comparative example 2 so that follow-up desulfurization system
The secondary salt production quantity of system is small, and alkaline consumption is low, no discharging of waste liquid, while reduces steam consumption when melting sulphur.
It should be noted that above by reference to the described each embodiment of attached drawing be only to illustrate the present invention and unrestricted
The range of invention, it will be understood by those of ordinary skill in the art that, it is right under the premise without departing from the spirit and scope of the present invention
The modification or equivalent replacement that the present invention carries out, should all cover within the scope of the present invention.It is in addition, signified unless the context
Outside, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of can be used with reference to all or part of of any other embodiment.
Claims (10)
1. a kind of continuous sulfur melting system, which is characterized in that including：Sulphur foam tank, backwash filter, surge tank and sulfur melting kettle；
The sulphur foam tank includes sulphur foam solution entrance and sulphur foam solution exports；
The inner cavity of the backwash filter is divided into epicoele and cavity of resorption by partition board, and the upper intracavitary is equipped with more filter cores；It is described
Filter core is fixed on the partition board, is exported including turbid entrance and cleaning solution；The turbid entrance of the filter core connects with the cavity of resorption
It is logical；The cavity of resorption is equipped with sulphur foam solution entrance and backwash dope exports, and the epicoele is exported equipped with the first doctor solution；The cavity of resorption
Interior to be equipped with rotatable rotating arm, during backwash, the turbid entrance of filter core, another described in one end connected component of the rotating arm
End connects the backwash dope outlet；
The surge tank includes backwash dope entrance and buffer solution exports；
The sulfur melting kettle includes buffer inlet, sulphur outlet and the outlet of the second doctor solution；
The sulphur foam solution outlet of the sulphur foam tank connects the sulphur foam solution entrance of the backwash filter, described backwashed
The backwash dope outlet of filter connects the backwash dope entrance of the surge tank, and the buffer solution of the surge tank is exported described in connection
The buffer inlet of sulfur melting kettle.
2. continuous sulfur melting system according to claim 1, which is characterized in that be equipped with blender in the sulphur foam tank.
3. continuous sulfur melting system according to claim 1, which is characterized in that in the sulphur foam tank and backwash filter
Between be equipped with sulphur foam pump, the input end of the sulphur foam pump connects the sulphur foam solution outlet of the sulphur foam tank, the sulphur bubble
The port of export of foam pump connects the sulphur foam solution entrance of the backwash filter.
4. continuous sulfur melting system according to claim 1, which is characterized in that the backwash filter is equipped with motor,
The motor drives the rotating arm rotation.
5. continuous sulfur melting system according to claim 1, which is characterized in that the surge tank enters equipped with compressed air
Mouthful.
6. continuous sulfur melting system according to claim 1, which is characterized in that heat exchanger is equipped in the sulfur melting kettle, it is described
Heat exchanger includes low temperature buffer liquid entrance, the outlet of high-temperature buffer liquid, high temperature desulfurizing liquid entrance and the outlet of low-temp desulfurization liquid, described molten
The buffer inlet of sulphur kettle connects the low temperature buffer liquid entrance, and the low-temp desulfurization liquid exports the second of the continuous sulfur melting kettle
Doctor solution exports.
A kind of 7. method using any continuous sulfur melting system processing sulphur foam of claim 1~6, which is characterized in that packet
Include step：
A, desulphurization system is regenerated to the sulphur foam solution come collect to sulphur foam tank；
B, by the sulphur foam tank collect sulphur foam solution be sent into backwash filter cavity of resorption, sulphur foam solution by the cavity of resorption into
Enter filter core to be filtered, the sulfur granules object in the sulphur foam solution precipitates in the filter core and forms filter cake, and cleaning solution enters institute
The epicoele of backwash filter is stated, is exported and discharged by the first doctor solution；
C, when reaching preset condition, rotating arm, which is rotated to the part filter core, to be connected, and the cleaning solution of the upper intracavitary passes through
The cleaning solution outlet of filter core enters the filter core, and the sulfur granules object of precipitation is rinsed, forms backwash dope, the backwash is dense
Liquid discharges the backwash filter by the rotating arm；
D, after completing backwash, the rotating arm, which is rotated to other filter cores, to be connected, it is backwashed；
E, backwash dope feeding surge tank is stored, forms buffer solution；
F, the buffer solution is sent into sulfur melting kettle, it is heated after sulfur granules in buffer solution sink to forming sulphur, doctor solution rise by
Second doctor solution outlet discharge.
8. the method according to the description of claim 7 is characterized in that in the step A, sulphur foam solution enters the sulphur foam tank
Afterwards, the sulphur foam solution is uniformly mixed by blender.
9. the method according to the description of claim 7 is characterized in that in the step E, it is empty to be passed through compression to the surge tank
Gas stirs buffer solution.
10. the method according to the description of claim 7 is characterized in that in the step F, the buffer solution enters the molten sulphur
After kettle, exchange heat in heat exchanger with the doctor solution.
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| CN201810063712.6A CN108178130A (en) | 2018-01-23 | 2018-01-23 | A kind of continuous sulfur melting system and method |
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| CN201810063712.6A CN108178130A (en) | 2018-01-23 | 2018-01-23 | A kind of continuous sulfur melting system and method |
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| CN110482494A (en) * | 2019-09-24 | 2019-11-22 | 武汉国力通能源环保股份有限公司 | Energy saving continuous sulfur melting process without discharging of waste liquid |
| CN111744266A (en) * | 2020-06-12 | 2020-10-09 | 山西清迪环保科技有限公司 | Sulfur foam combined treatment device and sulfur foam treatment method |
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