CN218841890U - Desulfurization waste liquid preliminary treatment and incineration equipment - Google Patents
Desulfurization waste liquid preliminary treatment and incineration equipment Download PDFInfo
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Abstract
The utility model belongs to the technical field of desulfurization waste liquid treatment facility, concretely relates to desulfurization waste liquid preliminary treatment and incineration equipment. The equipment comprises a sulfur paste separator, a buffer tank for cleaning and desulfurizing liquid, a sulfur melting kettle, a liquid sulfur intermediate tank, a sulfur burner and an evaporation and concentration system; a sulfur foam liquid inlet on the sulfur paste separator is connected with a sulfur foam liquid outlet of the sulfur foam storage tank, and a concentrated sulfur foam liquid outlet of the sulfur paste separator is connected with a concentrated sulfur foam liquid inlet on the sulfur melting kettle; a kettle bottom discharge port of the sulfur melting kettle is connected with a liquid sulfur inlet on the liquid sulfur intermediate tank; a liquid sulfur outlet at the bottom of the liquid sulfur intermediate tank is connected with a liquid sulfur atomizing nozzle on a sulfur burner; the upper part of the sulfur paste separator is provided with a supernatant overflow device which is connected with a clean doctor solution inlet on a clean doctor solution buffer tank. The equipment has the advantages of pipeline flow conveying, large treatment capacity, high continuous stability, full sealing, environment-friendly operation and the like.
Description
Technical Field
The utility model belongs to the technical field of desulfurization waste liquid treatment facility, concretely relates to desulfurization waste liquid preliminary treatment and incineration equipment.
Background
Desulfurization is an essential process in industries such as coking, coal chemical industry, petrochemical industry, natural gas chemical industry and the like. Most of sulfur elements in coal, petroleum and natural gas are removed in the form of hydrogen sulfide, and the processes are generally divided into a dry process and a wet process. The wet oxidation process technology of desulfurization goes through a long-term development process from the early relatively laggard arsenic-alkali process, the improved a.d.a process, the hydroquinone process, etc., to the modern TH process, FRC process, HPF process, etc. The wet oxidation HPF method using ammonia as an alkali source has the fastest technical development, has more perfect process flow and has the following characteristics: ammonia is used as an alkali source to absorb sulfide and cyanide in the coal gas, and absorption liquid and oxygen are desorbed and desulfurized under the action of a catalyst. The desulfurization method has been widely applied, but the defects are mainly that: the desulfurization waste liquid is generated in the desulfurization process, which is also a common disadvantage of wet desulfurization. The desulfurization waste liquid contains a large amount of inorganic salts such as high-toxicity and high-corrosiveness thiocyanate, thiosulfate and sulfate, and a plurality of impurities such as sulfur, tar, catalyst and the like, and the components of the desulfurization waste liquid are quite complex, so that the desulfurization waste liquid belongs to typical high-concentration wastewater which is difficult to degrade, toxic and harmful. The sulfur as the byproduct of desulfurization has low purity, more impurities and great environmental pollution.
The common desulfurization waste liquid treatment method mainly comprises a coal blending coke oven incineration method, a salt extraction method, a biochemical treatment method, an incineration production sulfuric acid method and the like, wherein in recent years, the method is gradually popularized and developed by the advantages of thorough treatment by an incineration process, no regenerated pollutants, capability of recycling the byproduct sulfuric acid and the like. The incineration process is divided into a dry process, a semi-dry process and a wet process, wherein the dry process generally separates sulfur and sulfur salt in the desulfurization waste liquid, dries the sulfur and sulfur salt and then enters an incineration system, and the dry process has the defects of poor operation environment and easy blockage of a concentration drying system; the semi-dry method is that sulfur or sulfur salt is burnt in a state of containing certain moisture, and has the defects of certain dilute acid generation and enhanced flue gas corrosivity; the wet method is to burn the sulfur and the sulfur salt under the condition of containing water, and has the defects that the coal gas needs to be supplemented for combustion due to large water content, and dilute acid is generated.
The process for producing sulfuric acid by incineration, whether a wet process, a dry process or a semi-dry process, needs pretreatment on the desulfurization waste liquid, and the pretreatment mainly comprises the processes of sulfur separation and desulfurization liquid concentration. The sulfur separation process generally adopts a sulfur melting kettle direct separation process (dry process) for sulfur-containing foam desulfurization waste liquid and adopts a filtering device to reduce the water content of sulfur foam and then directly incinerate (wet process) or enter a sulfur melting kettle and then separate (dry process). The sulfur foam liquid directly enters the sulfur melting kettle, so that the energy consumption is high and the treatment capacity is low; the sulfur foam separated by the filtering equipment contains coal tar, ammonia water and the like, so that the environment is polluted and the health of operators is influenced due to the inevitable existence of pungent odor on site.
Technical content
For solving the technical problem that exists among the above-mentioned prior art, the utility model provides a pipeline flow is carried, and the handling capacity is big, and continuous stability is high, and is totally enclosed, operation environment friendly's desulfurization waste liquid preliminary treatment and incineration equipment.
The technical scheme of the utility model is realized like this:
a desulfurization waste liquid pretreatment and incineration device comprises a sulfur paste separator, a desulfurization liquid cleaning buffer tank, a sulfur melting kettle, a liquid sulfur intermediate tank, a sulfur incinerator and an evaporation concentration system; a sulfur foam liquid inlet is formed in the sulfur paste separator, and a concentrated sulfur foam liquid outlet at the bottom of the sulfur paste separator is connected with a concentrated sulfur foam liquid inlet in the sulfur melting kettle through a concentrated sulfur foam pump; a kettle bottom discharge port of the sulfur melting kettle is connected with a liquid sulfur inlet on the liquid sulfur intermediate tank; a liquid sulfur outlet at the bottom of the liquid sulfur middle trough is connected with a liquid sulfur atomizing nozzle on the sulfur incinerator through a liquid sulfur pump; and the upper part of the sulfur paste separator is provided with a supernatant overflow device, and the supernatant overflow device is connected with a clean doctor solution inlet on the clean doctor solution buffer tank.
Preferably, the supernatant overflow device comprises the following structure: an intermediate overflow weir is arranged at the upper part of the sulfur paste separator, the upper part of the sulfur paste separator is communicated with the intermediate overflow weir through an overflow pipe, an outer ring overflow weir is arranged outside the intermediate overflow weir, and the intermediate overflow weir is communicated with the outer ring overflow weir through an overflow pipe; a sulfur foam liquid inlet is formed in the middle of the sulfur paste separator, and the sulfur foam liquid enters the sulfur paste separator in a tangential direction; the lower part of the sulfur paste separator is conical, and a concentrated sulfur foam liquid outlet is arranged at the bottom of the conical.
Preferably, a stirring device and a steam heating pipe are arranged in the liquid sulfur intermediate tank, the steam heating pipe is arranged in the liquid sulfur intermediate tank in a zigzag multi-layer mode, a jacket is arranged outside the liquid sulfur intermediate tank, a liquid sulfur intermediate tank liquid level meter is arranged at the top of the liquid sulfur intermediate tank, liquid sulfur and sulfur slag discharged from the bottom of the sulfur melting kettle enter the intermediate tank and are uniformly stirred and mixed through the stirring device, and the steam heating pipe and the jacket can prevent the liquid sulfur from being solidified after cooling.
Preferably, the sulfur incinerator is respectively provided with a sulfur salt atomizing nozzle, a liquid sulfur atomizing nozzle and a burner, and an air inlet of the liquid sulfur atomizing nozzle is communicated with an air station machine or an air compression station through a pipeline; the sulfur salt atomizing nozzle is connected with a sulfur salt concentrated solution outlet of the evaporation concentration system, and an air inlet of the sulfur salt atomizing nozzle is communicated with an air station machine or an air pressure station through a pipeline; the sulfur incinerator is internally provided with a sulfur incinerator top thermometer, a sulfur incinerator thermometer and a sulfur incinerator outlet thermometer from top to bottom in sequence, the sulfur incinerator top thermometer monitors the combustion working condition in the incinerator, the sulfur incinerator thermometer monitors the middle temperature condition of the sulfur incinerator, and the sulfur incinerator outlet thermometer monitors the temperature condition of flue gas when the flue gas is discharged; the sulfur burning furnace is also provided with a sulfur burning furnace top pressure gauge and a sulfur burning furnace outlet pressure gauge, and the sulfur burning furnace top pressure gauge measures the wind pressure at the burning position so as to judge the air distribution conditionThe outlet pressure gauge of the sulfur incinerator is used for assisting in monitoring the combustion and air distribution conditions; the sulfur incinerator is used for burning liquid sulfur and decomposing sulfur salt, and molten sulfur in the liquid sulfur intermediate tank is conveyed to the sulfur incinerator by a pump and is atomized and burned by compressed air; the sulfur salt concentrated solution sent by the evaporation concentration system is atomized by compressed air and then enters a sulfur burning furnace for burning; the exhaust port on the sulfur burning furnace is connected with the waste heat boiler through a pipeline, and SO generated by combustion in the sulfur burning furnace 2 、N 2 、NO X 、CO 2 And the high-temperature flue gas can enter the waste heat boiler for preheating and recycling, so that the energy is saved.
The desulfurization waste liquid is discharged liquid generated by desulfurization devices in coking, coal chemical industry, natural gas, petrochemical industry and the like, contains sulfur, tar, sulfur salt (mainly containing ammonium thiocyanate, ammonium thiosulfate and ammonium sulfate), ammonia gas, coal dust and the like due to complex components, is toxic and harmful, has serious pollution, and can cause serious environmental problems if effective treatment measures are not taken. The main effect of the process is to settle, melt and concentrate the sulfur-containing foam desulfurization waste liquid, separate out the concentrated solution and the sulfur foam to produce sulfuric acid, and the clear solution can be returned to the desulfurization system to prepare the desulfurization solution again.
The desulfurization waste liquid pretreatment and incineration equipment has the outstanding characteristics that the sulfur foam liquid inlet pressure and the flow velocity are utilized to enter the special sulfur paste separator along the tangential direction to generate micro-vortex rotary sedimentation separation, fine sulfur particles are gradually deposited to the bottom of the separator and enriched, and when the proper concentration is reached, the fine sulfur particles enter the concentrated sulfur foam pump through the cone bottom discharge valve and are conveyed to the special sulfur melting kettle to further melt and separate sulfur and desulfurization liquid; supernatant liquor of the separator overflows to a buffer tank after multistage sedimentation, supernatant liquor of the sulfur melting kettle also enters the buffer tank and then is pumped to a concentration evaporation system to improve the concentration (the clarified desulfurization solution can partially or completely return to the desulfurization system, and can also enter the concentration evaporation system to be concentrated and then enter a sulfur incinerator for heating and decomposition, and pollutants such as sulfur salt, tar and the like are completely converted into SO 2 、N 2 、NOX、CO 2 Etc.). Molten sulfur enters an intermediate tank with a steam heating pipe, is conveyed to a sulfur incinerator by a pump and is atomized and combusted by compressed air; the sulfur salt sent from the evaporation concentration system is concentratedAtomizing the liquid by compressed air and then burning the liquid in a sulfur burning furnace; the inside of the sulfur burning furnace is provided with a burner which is used for heating up the furnace during driving or supplementing heat during normal operation.
Advantageous effects
The beneficial effects of the utility model are summarized as follows: a desulfurization waste liquid preliminary treatment and incineration equipment, improved the defect and the disadvantage of original technology greatly, utilize professional equipment, material characteristic, appearance control system etc. realize low energy consumption, totally closed, large-scale production, continuity, automated control, the friendly novel technology of operating environment.
The novel special sulfur paste separator can replace a sulfur foam storage tank to store the desulfurization solution, and the concentration of the sulfur foam solution can be improved and the desulfurization solution can be separated by skillfully utilizing the structure without increasing power and energy consumption; the high-concentration sulfur foam liquid is further and completely separated into sulfur and desulfurization liquid through a special sulfur melting kettle, so that unnecessary energy consumption is greatly reduced; the clear desulfurization solution can be partially or completely returned to a desulfurization system, or enter a concentration evaporation system for concentration and then enter a sulfur incinerator for heating and decomposition, and the pollutants such as sulfur salt, tar and the like are completely converted into SO 2 、N 2 、NOX、CO 2 And the like. Molten sulfur and sulfur slag separated from the sulfur melting kettle enter an intermediate tank to be stirred and mixed, the mixture is sent into a sulfur incinerator by a pump and enters a special nozzle to be atomized and incinerated by matching with compressed air, and SO generated by decomposing sulfur salt is combined 2 The flue gas is used for producing sulfuric acid, the pipelining is realized in the middle conveying process, the energy is saved, the environment is protected, the good operation environment is kept, and the discharge of unorganized waste is avoided.
Outstanding characteristics of equipment for configuring special sulphur cream separator of sulphur foam, special sulphur melting kettle, the sulfur burner, the concentrated evaporimeter of filtrating, other auxiliary assembly are pump, air compressor machine (can set up alone also can utilize concentrated air compression station), fan etc, supporting corresponding valve, instrument, control system etc. telemetering thermometer, telemetering manometer, measuring instrument such as telemetering grain position meter to electric, pneumatic or mode driven governing valve surges, and trap, manual valve and pipe fittings etc.. All input and output signals of measurement, control and the like can enter a DCS or PLC system for centralized control, and a field operation box and the like can be configured to realize design functions.
Drawings
FIG. 1 is a schematic view of the overall structure of a desulfurization waste liquid pretreatment and incineration apparatus according to embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of a sulfur paste separator according to embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of a liquid sulfur intermediate tank according to embodiment 1 of the present invention;
FIG. 4 is a schematic view showing the structure of a sulfur burner according to embodiment 1 of the present invention;
in the figure, the main structure is as follows: 1: a sulfur paste separator; 1-1: an intermediate overflow weir; 1-2: an overflow pipe; 1-3: an outer ring overflow weir; 1-4: a sulfur foam liquid inlet; 1-5: a concentrated sulfur foam liquid outlet; 2: a buffer tank for the clean desulfurization solution; 3: a sulfur melting kettle; 4: a liquid sulfur intermediate tank; 4-1: a stirring device; 4-2: a steam heating pipe; 4-3: a middle tank jacket; 5: a sulfur incinerator; 5-1: a sulfur salt atomizing nozzle; 5-2: a liquid sulfur atomizing nozzle; 5-3: a burner; 5-4: air station machines or air compression stations; 5-5: a waste heat boiler; 6: an evaporative concentration system; 7: a sulfur foam pump; 8: a concentrated sulfur foam pump; 9: a clear desulfurization liquid pump; 10: a liquid sulfur pump; 11: a steam main pipe; 12: a sulfur foam storage tank; 13: a desulfurization system; 14: a condensate tank; 15: a tail gas treatment system.
Detailed Description
In order to deepen the understanding of the utility model, the utility model will be further detailed with the examples and the attached drawings, and the embodiment is only used for explaining the utility model and does not constitute the limitation of the protection scope of the utility model.
The embodiment of the utility model provides an in related main instrument and control valve explain as follows:
1.TIA0101 steam thermometer: measuring the steam inlet temperature and setting a high-limit alarm and a low-limit alarm;
temperature meters of the TICA0102-TICA 0104 sulfur melting kettle: measuring temperature values of different heights of the sulfur melting kettle;
3.TIA0105 sulphur melting kettle bottom thermometer: measuring the temperature of the liquid flowing out of the kettle bottom so as to judge the discharging temperature and the medium;
TIA0106 Sulfur melter top thermometer: detecting the temperature of the clear liquid flowing out of the sulfur melting kettle and the condition of the clear liquid at the upper layer;
5.pia0101 steam pressure gauge: measuring a steam admission temperature value;
pressure gauge of the PIA0102 sulfur melting kettle: and monitoring the pressure in the sulfur melting kettle.
7.pia0103 jacket pressure gauge: the pressure in the jacket was monitored.
FI0101 steam flow meter: measuring air inflow of steam sulfur melting kettle
9. Sulfur foam flow meter: the sulfur foam feed was measured.
10, PCV0101-PCV 0104 steam inlet regulating valve: adjusting the steam air inflow so as to adjust the corresponding temperature in the kettle;
pcv0105 sulphur foam inlet regulating valve: adjusting the liquid inlet quantity of sulfur foam;
12, PCV0106 liquid sulfur outlet regulating valve: adjusting the amount of the liquid sulfur flowing out of the sulfur melting kettle.
Pcv0107 clear liquid outlet regulating valve: adjusting the outflow volume of clear liquid;
14. P0101AB-P0104 AB pump pressure gauge: judging the operation state of each pump;
tia0201 incinerator top thermometer: monitoring the combustion condition in the furnace;
thermometer in tia0202 sulfur burner: monitoring the temperature condition of the middle part of the sulfur incinerator;
17.TIA0203 sulfur burner exit thermometer: monitoring the temperature condition of the flue gas discharged from the furnace;
18.PI0201 top pressure of sulfur incinerator: measuring the wind pressure at the combustion position so as to judge the air distribution condition;
19.PI0202 sulfur incinerator outlet pressure: combustion and air distribution conditions are monitored in an auxiliary mode;
20.PI0203 air pipe pressure: monitoring the running condition of the fan;
21.LIA0101 buffer tank liquid level of the clean doctor solution: monitoring the level height of the liquid in the tank;
LIA0102 liquid sulfur intermediate tank liquid level: and monitoring the level height of the liquid sulfur in the tank.
Example 1
As shown in figure 1, the desulfurization waste liquid pretreatment and incineration equipment comprises a sulfur paste separator 1, a clean desulfurization liquid buffer tank 2, a sulfur melting kettle 3, a liquid sulfur intermediate tank 4, a sulfur incinerator 5 and an evaporation concentration system 6.
The effect of the buffer tank for the clean desulfurization solution is as follows: the clean desulfurization liquid separated by the sulfur paste separator and the sulfur melting kettle enters a buffer tank for buffering.
And a sulfur foam liquid inlet on the sulfur paste separator 1 is connected with a sulfur foam liquid outlet of a sulfur foam storage tank 12 through a sulfur foam pump 7. And a concentrated sulfur foam liquid outlet at the bottom of the sulfur paste separator is connected with a concentrated sulfur foam liquid inlet on the sulfur melting kettle 3 through a concentrated sulfur foam pump 8.
A kettle bottom discharge port of the sulfur melting kettle 3 is connected with a liquid sulfur inlet on the liquid sulfur intermediate tank 4; and a liquid sulfur outlet at the bottom of the liquid sulfur intermediate tank 4 is connected with a liquid sulfur atomizing nozzle on the sulfur incinerator 5 through a liquid sulfur pump 10.
The upper part of the sulfur paste separator 1 is provided with a supernatant overflow device which is connected with a clean doctor solution inlet on the clean doctor solution buffer tank 2; a clear liquid outlet is formed in the top of the sulfur melting kettle 3 and is connected with a clean doctor solution inlet on the clean doctor solution buffer tank 2 through a clear liquid outlet regulating valve; and a clean desulfurization liquid outlet of the clean desulfurization liquid buffer tank 2 is connected with the evaporation concentration system 6 or the desulfurization system through a clean desulfurization liquid pump 9.
The sulfur foam pump is provided with 2 switches, one switch and one standby switch, is generally arranged near a sulfur foam storage tank of the desulfurization device and is used for conveying sulfur foam to a sulfur paste separator.
2 concentrated sulfur foam pumps are arranged, one pump is opened and the other pump is prepared, sulfur foam enters a concentrated sulfur foam pump from an outlet of a sulfur paste separator after being settled and concentrated, and is pressurized and conveyed to a sulfur melting kettle.
The clear desulfurization liquid pump sets up 2 one and opens one and is equipped with, and clear desulfurization liquid that separates out from the sulphur cream separator is sent into concentration vaporization system through clear desulfurization liquid pump.
The liquid sulfur pump is provided with 2 switches, one switch is on, the sulfur foam is melted by the sulfur melting kettle and then enters the liquid sulfur intermediate tank, and the mixed liquid sulfur and sulfur slag are sent to the sulfur incinerator for atomizing and burning by the liquid sulfur pump.
The main functions and the technological operation flow of the sulfur melting kettle are as follows:
sending the concentrated sulfur foam liquid to a sulfur melting kettle by a concentrated sulfur foam liquid pump, when the temperature rises to 70-90 ℃, breaking foam, separating sulfur particles from desulfurization liquid, gas, impurities and the like which are mixed with the sulfur particles, rising the gas and the desulfurization liquid due to small relative specific gravity, clarifying the desulfurization liquid when the temperature rises to a proper height, enabling the sulfur content to reach below 1 percent to enter an upper chamber along a clear liquid conduit, settling the sulfur particles downwards due to large specific gravity and gradually heating to be molten, and enabling the molten sulfur to flow out from a discharge valve at the bottom of the kettle; the supernatant of the sulfur melting kettle also enters a buffer tank and is pumped to a concentration evaporation system to improve the concentration.
The main functions and the technological operation flow of the evaporation concentration system are as follows:
generally, the concentration of circulating sulfur salt in the desulfurization solution is generally controlled to be about 250g/L, and the desulfurization solution is properly concentrated and then decomposed due to high water content, wherein the figure only illustrates a first-stage concentration and evaporation process; supernatant liquor in the buffer tank (the supernatant liquor of the separator overflows to the buffer tank after multi-stage sedimentation, and the supernatant liquor of the sulfur melting kettle also enters the buffer tank) is pumped to a concentration evaporation system to improve the concentration.
The method for pretreating and incinerating the desulfurization waste liquid by using the equipment comprises the following steps:
(1) Under the action of a sulfur foam pump 7, sulfur foam liquid in a sulfur foam storage tank enters a sulfur paste separator 1 tangentially by utilizing the liquid inlet pressure and the flow rate of the sulfur foam liquid to generate micro-vortex, rotate, settle and separate, fine sulfur particles are gradually deposited at the bottom of the sulfur paste separator and are enriched, and a discharge valve is opened when the concentrated sulfur foam liquid at the bottom of the sulfur paste separator reaches proper concentration; supernatant liquid of the sulfur paste separator overflows to a clean desulfurization liquid buffer tank 2 after multistage sedimentation;
(2) The concentrated sulfur foam liquid is conveyed to a sulfur melting kettle 3 under the action of a concentrated sulfur foam pump 8, sulfur and desulfurization liquid are further melted and separated, when the temperature is raised to 70-90 ℃, foam is broken, sulfur particles are separated from desulfurization liquid, gas and impurities mixed with the sulfur particles, the gas and the desulfurization liquid rise due to small relative gravity, when the temperature rises to a proper height, the desulfurization liquid is clarified, the sulfur content reaches below 1 percent, the desulfurization liquid enters an upper chamber along a clear liquid conduit, and the clear liquid entering the upper chamber enters a clear desulfurization liquid buffer tank 2 through a clear liquid outlet; the sulfur particles are settled downwards due to high specific gravity and gradually heated to be molten, and the sulfur particles flow out by opening a discharge valve at the bottom of the kettle;
(3) Liquid sulfur and sulfur slag discharged from the bottom of the sulfur melting kettle 3 enter the liquid sulfur intermediate tank 4 to be uniformly stirred and mixed, and the tank body is heated in order to prevent the liquid sulfur from being solidified after cooling;
(4) The clean desulfurization solution in the clean desulfurization solution buffer tank 2 is conveyed to a concentration evaporation system 6 through a clean desulfurization solution pump 9 to improve the concentration, or is partially or completely returned to the desulfurization system;
(5) The clear desulfurization solution enters an evaporation concentration system 6 to be evaporated and concentrated, the circulating sulfur salt concentration of the desulfurization solution is controlled to be 250g/L, the sulfur salt concentrated solution discharged by the evaporation concentration system enters a sulfur salt atomizing nozzle 5-1 to be atomized by matching with compressed air SO as to be uniformly sprayed to a sulfur burner 5, water is evaporated at high temperature in the burner, and the sulfur salt and tar are quickly decomposed and converted into SO 2 、N 2 、NOX、CO 2 ；
(6) The liquid sulfur mixed with the sulfur slag from the liquid sulfur intermediate tank 4 is sent to a liquid sulfur atomizing nozzle 5-2 by a liquid sulfur pump 10, is matched with heated compressed air, is evenly atomized and then sprayed into a sulfur incinerator 5 for combustion to generate SO 2 CO decomposed by gas and small amount of tar 2 And H 2 O。
Example 2
The present example differs from example 1 mainly in the specific structure of the sulfur paste separator 1.
The specific structure of the sulfur paste separator of the utility model is shown in fig. 2, the upper part of the sulfur paste separator is provided with a supernatant overflow device, and the supernatant overflow device is connected with a clean doctor solution inlet on the clean doctor solution buffer groove; the supernatant overflow device comprises the following structures: an intermediate overflow weir 1-1 is arranged at the upper part of the sulfur paste separator, the upper part of the sulfur paste separator is communicated with the intermediate overflow weir through an overflow pipe 1-2, an outer ring overflow weir 1-3 is arranged outside the intermediate overflow weir 1-1, and the intermediate overflow weir is communicated with the outer ring overflow weir through an overflow pipe 1-2; the middle part of the sulfur paste separator is provided with a sulfur foam liquid inlet 1-4, and the sulfur foam liquid enters the sulfur paste separator along the tangential direction; the lower part of the sulfur paste separator is conical, and a concentrated sulfur foam liquid outlet 1-5 is arranged at the bottom of the conical.
The main functions and the process operation flow of the sulfur paste separator are as follows:
sulphur foam liquid is by getting into along the tangential, form the vortex flow, the micro-vortex does benefit to the settlement of granule, the fine granule of sulphur is to middle gathering and settlement like this, sulphur cream separator lower part is the toper, the sulphur granule is more high more downwards concentration, it is the highest to bore the end export, supernatant overflow through the overflow pipe outflow sulphur cream separator, the bottom that stretches into middle overflow weir is subsided again, clear liquid after the settlement again enters outer lane overflow weir bottom through the overflow pipe and subsides once more, supernatant overflows once more and gets into clear doctor solution dashpot, a small amount of sulphur granule that overflow weir bottom subsides is intermittent to be discharged along with bore end export dense sulphur foam liquid.
The mechanism of the sulfur paste separator is eddy sedimentation, liquid inlet inertia acting force and slow speed stirrer sedimentation separation can be utilized, the liquid inlet inertia mode is exemplified in the figure, but the sedimentation separation of the slow speed stirrer is selected due to the influence of other factors, so that the protection range of the patent is not influenced. The sulfur paste separator is exemplified in the figure as a two-stage overflow structure, and the change of the number of overflow stages is not influenced by other factors, so that the protection scope of the patent is not influenced.
Example 3
The difference between this example and examples 1-2 lies mainly in the specific configuration of the liquid sulfur intermediate tank 4.
As shown in fig. 3, a stirring device 4-1 and a steam heating pipe 4-2 are arranged in the liquid sulfur intermediate tank 4, the steam heating pipe is arranged in the liquid sulfur intermediate tank in a zigzag multi-layer manner, an intermediate tank jacket 4-3 is arranged outside the liquid sulfur intermediate tank, a liquid sulfur intermediate tank liquid level meter LIA0102 is arranged at the top of the liquid sulfur intermediate tank, liquid sulfur and sulfur slag discharged from the bottom of the sulfur melting kettle enter the liquid sulfur intermediate tank and are uniformly stirred and mixed by the stirring device, and the steam heating pipe and the jacket can prevent the liquid sulfur from being solidified after the temperature is reduced.
The main functions of the system liquid sulfur intermediate tank in the embodiment are as follows:
liquid sulfur and sulfur slag discharged from the bottom of the sulfur melting kettle enter a liquid sulfur intermediate tank to be uniformly stirred and mixed, and a tank body needs to be provided with a heating pipe and a jacket for preventing the liquid sulfur from being solidified after cooling.
Example 4
The present example is different from examples 1 to 3 mainly in the specific structure of the sulfur incinerator 5.
As shown in fig. 4, the sulfur incinerator 5 is provided with a sulfur salt atomizing nozzle 5-1, a liquid sulfur atomizing nozzle 5-2 and a burner 5-3, and an air inlet of the liquid sulfur atomizing nozzle is communicated with an air station machine or an air pressure station 5-4 through a pipeline; the sulfur salt atomizing nozzle is connected with a sulfur salt concentrated solution outlet of the evaporation concentration system 6, and an air inlet of the sulfur salt atomizing nozzle is communicated with an air station machine or an air pressure station 5-4 through a pipeline.
The sulfur salt atomizing nozzle, the concentrated sulfur salt solution through evaporation concentration enters the atomizing nozzle through the delivery pump of the evaporation system, and is matched with compressed air for atomization, SO that the concentrated sulfur salt solution is uniformly sprayed to the sulfur burning furnace, the water is evaporated by the high temperature in the furnace, the sulfur salt is rapidly decomposed, and SO is generated 2 Is one of the main components of decomposition.
The liquid sulfur from the liquid sulfur intermediate tank mixed with the sulfur slag is pumped to the atomizing nozzle by a liquid sulfur pump, is matched with the heated compressed air, is uniformly atomized and then sprayed into a sulfur incinerator for combustion to generate SO 2 CO decomposed by gas and small amount of tar 2 And H 2 O, and the like.
The combustor is used for raising the temperature of the furnace during starting to enable liquid sulfur to reach the combustion temperature and the decomposition temperature of the concentrated sulfur salt liquid, whether the combustor is used during normal operation is determined according to the water content of the concentrated sulfur salt liquid and the proportion condition of the liquid sulfur and the concentrated sulfur salt liquid, and the fuel of the combustor can be flammable liquid or gas such as coal powder, diesel oil, heavy oil, natural gas, coal gas and the like.
The sulfur incinerator is internally provided with a sulfur incinerator top thermometer TIA0201, a sulfur incinerator mesophilic thermometer TIA0202 and a sulfur incinerator outlet thermometer TIA0203 from top to bottom in sequence, the sulfur incinerator top thermometer monitors the combustion working condition in the incinerator, the sulfur incinerator mesophilic thermometer monitors the temperature condition in the middle of the sulfur incinerator, and the sulfur incinerator outlet thermometer monitors the temperature condition of flue gas discharged from the incinerator.
Still be provided with in the sulfur burning furnace and burn sulfur burning furnace roof pressure gauge PI0201, sulfur burning furnace export pressure gauge PI0202, burn position wind pressure is measured to this judgement air distribution condition, and the supplementary burning of monitoring of sulfur burning furnace export pressure gauge and air distribution condition.
The sulfur incinerator is used for burning liquid sulfur and decomposing sulfur salt, molten sulfur in the liquid sulfur intermediate tank is conveyed to the sulfur incinerator by a pump and is atomized and burned by compressed air; the sulfur salt concentrated solution sent by the evaporation concentration system is atomized by compressed air and then enters a sulfur furnace for combustion; the exhaust port on the sulfur burning furnace is connected with a waste heat boiler through a pipeline, and SO generated by combustion in the sulfur burning furnace 2 、N 2 、NO X 、CO 2 When the high-temperature flue gas can enter the waste heat boiler for preheating and recycling, the energy is saved more.
The main functions and the process operation flow of the sulfur incinerator are as follows:
the sulfur-containing liquid sulfur burner is used for burning liquid sulfur and decomposing sulfur salt and needs to be matched with a sulfur salt atomizing nozzle, a liquid sulfur atomizing nozzle and a burner for use together. The sulfur burner is used for burning liquid sulfur and decomposing sulfur salt, and generally needs to be provided with a sulfur salt atomizing nozzle, a liquid sulfur atomizing nozzle and a burner, but because the usage can only burn the liquid sulfur or decompose the sulfur salt, only the liquid sulfur atomizing nozzle and the burner can be arranged when only the liquid sulfur is burned, only the sulfur salt atomizing nozzle and the burner can be arranged when only the sulfur salt is decomposed, and the change of the usage does not influence the protection scope of the patent; the installation position, the number and the form change of the sulfur salt atomizing nozzle, the liquid sulfur atomizing nozzle and the burner do not influence the protection scope of the patent. The sulfur incinerator is of a vertical structure in the drawing, but the furnace body structure is changed into a horizontal type or other types due to the influences of capacity, site, environment, position and other factors, so that the protection scope of the patent is not influenced.
Example 5
This example differs from examples 1 to 4 mainly in that:
the desulfurization waste liquid pretreatment and incineration equipment is further provided with a control system, input and output signals of all measurement, control and the like can enter a DCS or a PLC system for centralized control, and a field operation box and the like can be configured to realize design functions.
The increase and decrease of the number of the devices caused by the influence of productivity, field, environment, position and other factors does not influence the protection scope of the patent.
In the figure, instruments such as temperature, pressure, flow and liquid level, regulating valves, manual valves, drain valves and other valve pipe fittings are illustrated, and can be influenced by design factors such as scale, requirements, conditions and environment due to matching process and technical requirements, the quantity, the structure and the position can be changed and adjusted, and the change and the adjustment do not influence the protection range of the patent.
The dotted line in the figure delimitates the range as the first-stage concentration evaporation process, and the configured concentration equipment, the process flow and the stage number can be different due to the influence of design conditions and other factors.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a desulfurization waste liquid preliminary treatment and incineration equipment which characterized in that: comprises a sulfur paste separator, a buffer tank for cleaning and desulfurizing liquid, a sulfur melting kettle, a liquid sulfur intermediate tank, a sulfur burner and an evaporation and concentration system;
a sulfur foam liquid inlet on the sulfur paste separator is connected with a sulfur foam liquid outlet of the sulfur foam storage tank through a sulfur foam pump, and a concentrated sulfur foam liquid outlet at the bottom of the sulfur paste separator is connected with a concentrated sulfur foam liquid inlet on the sulfur melting kettle through a concentrated sulfur foam pump; a kettle bottom discharge port of the sulfur melting kettle is connected with a liquid sulfur inlet on the liquid sulfur intermediate tank; a liquid sulfur outlet at the bottom of the liquid sulfur intermediate tank is connected with a liquid sulfur atomizing nozzle on the sulfur incinerator through a liquid sulfur pump;
and the upper part of the sulfur paste separator is provided with a supernatant overflow device, and the supernatant overflow device is connected with a clean doctor solution inlet on the clean doctor solution buffer tank.
2. The desulfurization waste liquid pretreatment and incineration apparatus according to claim 1, characterized in that: the supernatant liquid overflow device of the sulfur paste separator comprises the following structures: an intermediate overflow weir is arranged at the upper part of the sulfur paste separator, the upper part of the sulfur paste separator is communicated with the intermediate overflow weir through an overflow pipe, an outer ring overflow weir is arranged outside the intermediate overflow weir, and the intermediate overflow weir is communicated with the outer ring overflow weir through an overflow pipe.
3. The desulfurization waste liquid pretreatment and incineration apparatus according to claim 2, wherein: a sulfur foam liquid inlet is formed in the middle of the sulfur paste separator, and the sulfur foam liquid enters the sulfur paste separator in a tangential direction; the lower part of the sulfur paste separator is conical, and a concentrated sulfur foam liquid outlet is arranged at the bottom of the conical.
4. The desulfurization waste liquid pretreatment and incineration apparatus of claim 1, wherein: a clear liquid outlet is formed in the top of the sulfur melting kettle and is connected with a clean desulfurization liquid inlet on the clean desulfurization liquid buffer tank through a clear liquid outlet regulating valve; and a clean desulfurization liquid outlet of the clean desulfurization liquid buffer tank is connected with an evaporation concentration system or a desulfurization system through a clean desulfurization liquid pump.
5. The desulfurization waste liquid pretreatment and incineration apparatus according to claim 1, characterized in that: and a sulfur salt concentrated solution outlet of the evaporation concentration system is connected with a sulfur salt atomizing nozzle on the sulfur incinerator through a pipeline.
6. The desulfurization waste liquid pretreatment and incineration apparatus according to claim 1, characterized in that: the liquid sulfur intermediate tank is internally provided with a stirring device and a steam heating pipe, the steam heating pipe is arranged in the liquid sulfur intermediate tank in a zigzag multi-layer mode, a jacket is arranged outside the liquid sulfur intermediate tank, and the top of the liquid sulfur intermediate tank is provided with a liquid sulfur intermediate tank liquid level meter.
7. The desulfurization waste liquid pretreatment and incineration apparatus of claim 1, wherein: the sulfur incinerator is provided with a sulfur salt atomizing nozzle, a liquid sulfur atomizing nozzle and a burner respectively, and an air inlet of the liquid sulfur atomizing nozzle is communicated with an air station machine or an air compression station through a pipeline; the sulfur salt atomizing nozzle is connected with a sulfur salt concentrated solution outlet of the evaporation concentration system, and an air inlet of the sulfur salt atomizing nozzle is communicated with an air station machine or an air pressure station through a pipeline.
8. The desulfurization waste liquid pretreatment and incineration apparatus according to claim 7, characterized in that: a sulfur incinerator top thermometer, a sulfur incinerator middle thermometer and a sulfur incinerator outlet thermometer are sequentially arranged in the sulfur incinerator from top to bottom; a sulfur burning furnace top pressure gauge and a sulfur burning furnace outlet pressure gauge are also arranged in the sulfur burning furnace; and an exhaust port on the sulfur incinerator is connected with a waste heat boiler through a pipeline.
9. The desulfurization waste liquid pretreatment and incineration apparatus of claim 1, wherein: the sulfur foam pump, the concentrated sulfur foam pump, the liquid sulfur pump and the clean desulfurization liquid pump are respectively provided with 2 pumps, one for one and one for standby.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223240965.7U CN218841890U (en) | 2022-12-05 | 2022-12-05 | Desulfurization waste liquid preliminary treatment and incineration equipment |
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| CN202223240965.7U CN218841890U (en) | 2022-12-05 | 2022-12-05 | Desulfurization waste liquid preliminary treatment and incineration equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117069069A (en) * | 2023-08-29 | 2023-11-17 | 萍乡市新安环保工程有限公司 | Mixed acid making process based on coking desulfurization waste liquid and sulfur foam |
-
2022
- 2022-12-05 CN CN202223240965.7U patent/CN218841890U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117069069A (en) * | 2023-08-29 | 2023-11-17 | 萍乡市新安环保工程有限公司 | Mixed acid making process based on coking desulfurization waste liquid and sulfur foam |
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