Device for pretreating dichloroethane by pyrogenic process
Technical Field
The invention belongs to the technical field of waste liquid treatment, and particularly relates to a device for pretreating dichloroethane by a pyrogenic process.
Background
Dichloroethane is an organic compound, is one of halogenated hydrocarbons, is colorless or pale yellow transparent liquid, is insoluble in water, can be combusted, is colorless at room temperature and has a liquid flavor similar to chloroform, various high-chlorine organic matters are toxic, and easily cause human deformity and cancer, and even cause gene mutation in severe cases, so that the dichloroethane needs to be timely treated in the processes of waste collection and centralized treatment. The economic and reasonable disposal method in the industrial dichloroethane processing method is to burn the dichloroethane, but the dichloroethane is easy to decompose a large amount of acidic liquid-hydrogen chloride in the burning process, so that the corrosion of burning equipment and pipelines is serious. Although wet pretreatment can be adopted to decompose dichloroethane to remove chloride ions, the sewage treatment in the later stage of pretreatment is also a huge problem, and the cost of wet pretreatment is higher. Therefore, aiming at the problems of wet-process dichloroethane pretreatment-incineration, combined with the characteristic of higher dichloroethane combustion value, the analysis and discussion of professional technicians propose to adopt the incinerator external fire method to pretreat dichloroethane dangerous waste.
Therefore, the prior method for processing the dichloroethane still has the following disadvantages in practical use.
The existing dichloroethane treatment mode generally has the problem of easily causing serious corrosion to incineration equipment and pipelines.
The existing dichloroethane processing mode generally has the problems of higher processing cost and lower dichloroethane amount processed by an incinerator;
therefore, the existing processing method of dichloroethane cannot meet the requirements in practical use, so that improved technology is urgently needed in the market to solve the above problems.
Disclosure of Invention
The invention aims to provide a device for pretreating dichloroethane by a pyrogenic process, which can avoid hydrogen chloride from corroding incineration equipment by arranging a pressure pump, a combustion nozzle, a gas collecting hood and an alkali liquor treatment mechanism, and can pretreat part of liquid generated by dichloroethane combustion and provide a technical reference for later treatment of organic wastes containing acidic liquid with higher combustion value, thereby solving the problems that the conventional dichloroethane treatment mode generally causes serious corrosion to the incineration equipment and pipelines, the treatment cost is higher, and the amount of dichloroethane treated by an incinerator is lower.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a device for pretreating dichloroethane by fire, which comprises a dichloroethane liquid storage tank, wherein the dichloroethane liquid storage tank is communicated with a liquid outlet pipe, the liquid outlet pipe is communicated with a liquid inlet of a pressure pump through a first flange plate, a second flange plate and a first liquid conveying pipe, a liquid outlet of the pressure pump is communicated with a combustion nozzle through a second liquid conveying pipe, the outer side of the combustion nozzle is provided with a gas collecting hood, the gas collecting hood is communicated with a second smoke pipe through a first smoke pipe and a first induced draft fan, the right end of the second smoke pipe is fixedly connected with a third flange plate, the third flange plate is fixedly connected with a fourth flange plate, the fourth flange plate is communicated with an inner cavity of a spray tower of an alkali liquor treatment mechanism through a third smoke pipe, the side wall of the inner cavity of the spray tower is fixedly connected with two connecting supports, and the side wall of each connecting support is fixedly connected with a spray pipe, the shower with spray the mouth intercommunication, spray the mouth and be the setting of circumference array structure between the axle center about the spray column, the shower passes through the delivery port intercommunication of coupling hose, basicity transfer line and booster pump, the water inlet of booster pump passes through the drain pipe and joins in marriage alkali groove intercommunication, the upper end of spray column is through the inlet intercommunication of first connecting pipe, second draught fan, second connecting pipe and burning furnace.
Further, the liquid outlet pipe is communicated with the first valve, and the liquid outlet pipe is communicated with the second valve.
Furthermore, the bottom side wall of the spray tower is communicated with the upper end of the waste liquid discharge pipe, the lower side wall of the spray tower is fixedly connected with three supporting bottom columns, the number of the supporting bottom columns is three, the supporting bottom columns are arranged in a circumferential array structure relative to the axis of the spray tower, the waste liquid discharge pipe is communicated with a third valve, and the liquid outlet of the incinerator is communicated with the tail liquid discharge pipe.
Furthermore, a supporting side plate is fixedly connected to the side wall of the gas collecting hood, an igniter is fixedly connected to the upper side wall of the supporting side plate, an ignition nozzle of the igniter extends to the inner side of the gas collecting hood, and a supporting rib plate is fixedly connected between the lower side wall of the supporting side plate and the right side wall of the gas collecting hood.
Furthermore, the right end of the liquid outlet pipe is fixedly connected with a first flange, and a second flange is fixedly connected with the left end of the first liquid conveying pipe.
Further, the upper end and the first tobacco pipe intercommunication of gas collecting channel, the air intake intercommunication of first tobacco pipe and first draught fan, the air intake and the second tobacco pipe intercommunication of first draught fan.
Further, the shower pipe is communicated with a connecting hose, the connecting hose is communicated with an alkaline infusion pipe, the alkaline infusion pipe is communicated with a side wall structure penetrating through the spray tower, and the alkaline infusion pipe is communicated with a water outlet of the booster pump.
Further, the upper end and the first connecting pipe intercommunication of spray column, first connecting pipe are the last side wall structure setting that runs through the spray column, the inlet intercommunication of first connecting pipe and second draught fan, the liquid outlet and the second connecting pipe intercommunication of second draught fan, the second connecting pipe communicates with the inlet that burns burning furnace.
The invention has the following beneficial effects:
the invention is provided with a pressure pump, a combustion nozzle, a gas collecting hood and an alkali liquor processing mechanism, wherein the pressure pump pressurizes dichloroethane in a dichloroethane liquid storage tank and then sprays out through the combustion nozzle, an ignition nozzle of an igniter ignites the dichloroethane, the dichloroethane burns outside a furnace, hydrogen chloride liquid generated by burning is gathered in the gas collecting hood, a first induced draft fan conveys the hydrogen chloride liquid into a spray tower of the alkali liquor processing mechanism through a first smoke pipe and a second smoke pipe, a booster pump pressurizes alkaline solution in an alkali distributing tank and then conveys the alkaline solution into the spray nozzle through an alkaline liquid conveying pipe, a connecting hose and a spray pipe, the spray nozzle sprays out the alkaline solution, the alkaline solution reacts with acidic liquid such as hydrogen chloride, unreacted acidic liquid and other harmful liquid are conveyed into an incinerator through the second induced draft fan, the incinerator burns the unreacted acidic liquid and other harmful liquid, the method for pretreating dichloroethane by adopting the external fire method can effectively reduce the corrosion of hydrogen chloride liquid to incineration equipment and pipelines, and solves the problem that the conventional dichloroethane treatment method is easy to cause serious corrosion to the incineration equipment and the pipelines.
The invention is provided with a pressure pump, a combustion nozzle, a gas collecting hood and an alkali liquor processing mechanism, wherein the pressure pump pressurizes dichloroethane in a dichloroethane liquid storage tank and then sprays out through the combustion nozzle, an ignition nozzle of an igniter ignites the dichloroethane, the dichloroethane burns outside a furnace, hydrogen chloride liquid generated by burning is gathered in the gas collecting hood, a first induced draft fan conveys the hydrogen chloride liquid into a spray tower of the alkali liquor processing mechanism through a first smoke pipe and a second smoke pipe, a booster pump pressurizes alkaline solution in an alkali distributing tank and then conveys the alkaline solution into the spray nozzle through an alkaline liquid conveying pipe, a connecting hose and a spray pipe, the spray nozzle sprays out the alkaline solution, the alkaline solution reacts with acidic liquid such as hydrogen chloride, unreacted acidic liquid and other harmful liquid are conveyed into an incinerator through the second induced draft fan, the incinerator burns the unreacted acidic liquid and other harmful liquid, the method for pretreating dichloroethane by adopting the external fire method of the incinerator and the mode of neutralizing hydrogen chloride by using the alkali liquor can greatly reduce the amount of liquid treated by the incinerator, meanwhile, the mode of neutralizing hydrogen chloride by using the alkali liquor is low in cost and convenient for practical operation, and simultaneously, part of liquid generated by dichloroethane combustion can be pretreated, so that the amount of liquid finally combusted by the incinerator is greatly reduced, more dichloroethane can be treated by the incinerator, a technical reference is provided for later treatment of organic wastes containing acidic liquid with higher combustion value, and the problems that the treatment cost of the existing dichloroethane treatment mode is generally higher and the amount of dichloroethane treated by the incinerator is lower are solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the connection of the dichloroethane stock tank of the present invention;
FIG. 3 is a schematic view of the connection of the pressure pump according to the present invention;
fig. 4 is a schematic view of the connection of the gas skirt of the present invention;
FIG. 5 is a schematic view of the connection of the alkali solution treatment mechanism in the present invention;
FIG. 6 is a schematic view showing the connection of a waste liquid discharge pipe according to the present invention;
FIG. 7 is a schematic view of the connection of the connecting bracket of the present invention;
FIG. 8 is a schematic view showing the connection of an incinerator according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a dichloroethane liquid storage tank; 101. a liquid outlet pipe; 102. a first flange plate; 103. a first valve; 2. a pressure pump; 201. a second flange plate; 202. a first infusion tube; 203. a second infusion tube; 204. a combustion nozzle; 3. a gas-collecting hood; 301. a first smoke tube; 4. a first induced draft fan; 401. a second smoke tube; 402. a third flange plate; 403. a fourth flange plate; 404. a third smoke tube; 5. an alkali liquor treatment mechanism; 501. a spray tower; 502. connecting a bracket; 503. a shower pipe; 504. a spray nozzle; 505. a connecting hose; 506. an alkaline infusion tube; 507. a booster pump; 508. a liquid outlet pipe; 509. an alkali preparation tank; 510. a second valve; 511. a waste liquid discharge pipe; 512. a third valve; 6. a second induced draft fan; 601. a first connecting pipe; 7. an incinerator; 701. a second connecting pipe; 702. a tail liquid discharge pipe; 8. supporting the side plates; 9. an igniter; 901. an ignition nozzle.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-8, the present invention is a device for pretreating dichloroethane by fire, including a dichloroethane liquid storage tank 1, the dichloroethane liquid storage tank 1 is communicated with a liquid outlet pipe 101, the liquid outlet pipe 101 is communicated with a liquid inlet of a pressure pump 2 through a first flange plate 102, a second flange plate 201 and a first liquid conveying pipe 202, a liquid outlet of the pressure pump 2 is communicated with a combustion nozzle 204 through a second liquid conveying pipe 203, a gas collecting hood 3 is disposed outside the combustion nozzle 204, hydrogen chloride liquid generated by combustion is collected in the gas collecting hood 3, the gas collecting hood 3 is communicated with a second smoke pipe 401 through a first smoke pipe 301 and a first induced draft fan 4, a right end of the second smoke pipe 401 is fixedly connected with a third flange plate 402, the third flange plate 402 is fixedly connected with a fourth flange plate 403, a rubber sealing gasket is disposed between the third flange plate 402 and the fourth flange plate 403, and the third flange plate 402 is connected with the fourth flange plate 403 through bolts, The fourth flange plate 403 is connected together, the fourth flange plate 403 is communicated with the inner cavity of a spray tower 501 of the alkali liquor treatment mechanism 5 through a third smoke pipe 404, the alkali liquor treatment mechanism 5 comprises the spray tower 501, a connecting bracket 502, a spray pipe 503, a spray nozzle 504, a connecting hose 505, an alkali liquor conveying pipe 506, a booster pump 507, a liquid outlet pipe 508, an alkali distribution tank 509, a second valve 510, a waste liquid discharge pipe 511 and a third valve 512, the side wall of the inner cavity of the spray tower 501 is fixedly connected with the connecting bracket 502, the side wall of the connecting bracket 502 is fixedly connected with the spray pipe 503, the spray pipe 503 is communicated with the spray nozzle 504, the spray pipe 503 is communicated with the water outlet of the booster pump 507 through the connecting hose 505 and the alkali liquor conveying pipe 506, the booster pump 507 adopts a horizontal centrifugal pump, the type is a common type in the market, and description is not provided herein, the water inlet of the booster pump, the alkali distribution tank 509 is filled with prepared alkaline solution, such as sodium hydroxide solution, and the like, the upper end of the spray tower 501 is communicated with the liquid inlet of the incinerator 7 through a first connecting pipe 601, a second induced draft fan 6 and a second connecting pipe 701, firstly, the dichloroethane in the dichloroethane liquid storage tank 1 is pressurized by the pressure pump 2 and then is sprayed out through the combustion nozzle 204, the dichloroethane is ignited by the ignition nozzle 901 of the igniter 9, and the dichloroethane is combusted outside the incinerator; secondly, hydrogen chloride liquid generated by combustion is gathered in the gas-collecting hood 3, and the hydrogen chloride liquid is conveyed to a spray tower 501 of the alkali liquor treatment mechanism 5 by a first induced draft fan 4 through a first smoke tube 301 and a second smoke tube 401; thirdly, after pressurizing the alkaline solution in the alkaline preparation tank 509 by a booster pump 507, conveying the alkaline solution to a spray nozzle 504 through an alkaline liquid conveying pipe 506, a connecting hose 505 and a spray pipe 503, spraying the alkaline solution out by the spray nozzle 504, and reacting the alkaline solution with acidic liquid such as hydrogen chloride and the like; and finally, conveying the unreacted acid liquid and other harmful liquids into an incinerator 7 by a second induced draft fan 6, and combusting the unreacted acid liquid and other harmful liquids by the incinerator 7.
As shown in fig. 2 and 5, the liquid outlet pipe 101 is communicated with the first valve 103, the liquid outlet pipe 508 is communicated with the second valve 510, and the first valve 103 and the second valve 510 are both manual ball valves, which are of a type commonly found in the market and will not be described herein too much.
As shown in fig. 6 and 7, the bottom side wall of the spray tower 501 is communicated with the upper end of a waste liquid discharge pipe 511, the waste liquid discharge pipe 511 is communicated with a third valve 512, the liquid outlet of the incinerator 7 is communicated with a tail liquid discharge pipe 702, the waste liquid after the reaction with the hydrogen chloride liquid in the spray tower 501 is discharged by opening the third valve 512, the third valve 512 adopts a manual ball valve, which is a common type in the market, and not described much, the incinerator 7 further burns the acid liquid which is not completely reacted and other harmful liquid, and discharges the waste liquid which meets the discharge standard through the tail liquid discharge pipe 702.
As shown in fig. 4, a supporting side plate 8 is fixedly connected to a side wall of the gas collecting hood 3, an igniter 9 is fixedly connected to an upper side wall of the supporting side plate 8, an ignition nozzle 901 of the igniter 9 extends to the inner side of the gas collecting hood 3, the upper end of the gas collecting hood 3 is communicated with a first smoke tube 301, the first smoke tube 301 is communicated with an air inlet of a first induced draft fan 4, the first induced draft fan 4 and a second induced draft fan 6 are all axial flow fans which are common in the market, and are not described much here, the air inlet is communicated with a second smoke tube 401, the ignition nozzle 901 of the igniter 9 ignites dichloroethane, the dichloroethane is combusted outside the furnace, hydrogen chloride liquid generated by the combustion is collected in the gas collecting hood 3, and the first induced draft fan 4 conveys the hydrogen chloride liquid to a spray tower 501 of the alkali liquor treatment mechanism 5 through the first smoke tube 301 and the second smoke tube 401.
As shown in fig. 2 and 3, the right end of the liquid outlet pipe 101 is fixedly connected with the first flange plate 102, the second flange plate 201 is fixedly connected with the left end of the first liquid conveying pipe 202, a rubber gasket is arranged between the first flange plate and the second flange plate 201 of the first liquid conveying pipe 102, and the first flange plate 102 and the second flange plate 201 are connected together through bolts.
As shown in fig. 5 and 7, the shower pipe 503 is communicated with a connection hose 505, the connection hose 505 is communicated with an alkaline infusion pipe 506, the alkaline infusion pipe 506 is communicated with a water outlet of a booster pump 507, the booster pump 507 pressurizes the alkaline solution in an alkaline preparation tank 509, and then the alkaline solution is conveyed to the shower nozzle 504 through the alkaline infusion pipe 506, the connection hose 505 and the shower pipe 503, the shower nozzle 504 sprays the alkaline solution, and the alkaline solution reacts with acidic liquid such as hydrogen chloride.
As shown in fig. 6 and 8, the upper end of the spray tower 501 is communicated with a first connection pipe 601, the first connection pipe 601 is communicated with a liquid inlet of a second induced draft fan 6, a liquid outlet of the second induced draft fan 6 is communicated with a second connection pipe 701, the second connection pipe 701 is communicated with a liquid inlet of the incinerator 7, the spray nozzle 504 sprays out an alkaline solution, the alkaline solution reacts with acidic liquid such as hydrogen chloride, the unreacted acidic liquid and other harmful liquid are conveyed to the incinerator 7 by the second induced draft fan 6, and the unreacted acidic liquid and other harmful liquid are combusted by the incinerator 7.
One specific application of this embodiment is: firstly, opening a first valve 103, leading dichloroethane to reach a pressure pump 2 through a liquid outlet pipe 101 and a first liquid conveying pipe 202, leading the dichloroethane in a dichloroethane liquid storage tank 1 to reach a combustion nozzle 204 through a second liquid conveying pipe 203 after the dichloroethane is pressurized by the pressure pump 2, and leading the dichloroethane to be sprayed out through the combustion nozzle 204; secondly, igniting dichloroethane by an ignition nozzle 901 of the igniter 9, burning the dichloroethane outside the furnace, and gathering hydrogen chloride liquid generated by burning in the gas-collecting hood 3; thirdly, the first induced draft fan 4 conveys the hydrogen chloride liquid to a spray tower 501 of the alkali liquor processing mechanism 5 through a first smoke pipe 301, a second smoke pipe 401 and a third smoke pipe 404, an alkaline solution in an alkali liquor preparation tank 509 is pressurized by a booster pump 507 and then conveyed to a spray nozzle 504 through an alkaline liquid conveying pipe 506, a connecting hose 505 and a spray pipe 503, the spray nozzle 504 sprays the alkaline solution, and the alkaline solution reacts with acidic liquid such as hydrogen chloride; fourthly, the acid liquid and other harmful liquid which are not completely reacted are conveyed into the incinerator 7 by the second induced draft fan 6 through the first connecting pipe 601 and the second connecting pipe 701, the incinerator 7 burns the acid liquid and other harmful liquid which are not completely reacted, and the waste liquid which reaches the emission standard is discharged through the tail liquid discharge pipe 702; and fifthly, opening the third valve 512 to discharge the waste liquid after the reaction between the hydrogen chloride liquid and the spray tower 501.
The above are only preferred embodiments of the present invention, and the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made to the technical solutions described in the above embodiments, and to some of the technical features thereof, are included in the scope of the present invention.