CN115950273A - High-temperature flue gas drying sludge treatment equipment and process for metal smelting furnace - Google Patents
High-temperature flue gas drying sludge treatment equipment and process for metal smelting furnace Download PDFInfo
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Abstract
The invention relates to the technical field of metal smelting furnace flue gas sludge treatment, in particular to a metal smelting furnace high-temperature flue gas drying sludge treatment device and a metal smelting furnace high-temperature flue gas drying sludge treatment process, wherein the metal smelting furnace high-temperature flue gas treatment device comprises a metal smelting furnace high-temperature flue gas collecting device, a sludge drying device and a water dust removing device, and the high-temperature flue gas drying and sludge treatment process comprises the processes of monitoring and replacing the dryness and humidity of sludge, monitoring the temperature of the high-temperature flue gas of a metal smelting furnace, cooling, dust removing and the like; the invention provides a set of automatic high-temperature flue gas treatment and sludge drying device for a metal smelting furnace, which fully utilizes partial heat energy of high-temperature flue gas generated by the metal smelting furnace, links the heat energy with a drying treatment process of sludge, dries the sludge by using high-temperature waste gas and then treats waste gas, avoids the contact of the sludge and the waste gas with a human body in the waste gas treatment and sludge drying processes, has high automation degree, is safe and efficient, can reduce the operation cost of enterprises, and can increase profits.
Description
Technical Field
The invention relates to the technical field of metal smelting furnace flue gas sludge treatment, in particular to a metal smelting furnace high-temperature flue gas drying sludge treatment device and process.
Background
With the rapid development of industry, the demand for metals is continuously rising, the emission of a large amount of high-temperature dust-containing waste gas in the smelting process causes serious environmental pollution, the physical and mental health of people is seriously influenced, a large amount of unnecessary waste of heat energy is caused, and the healthy and stable development of related industries is seriously restricted. The high-temperature dust-containing waste gas generated in the metal smelting process has the characteristics of high temperature (450-1400 ℃), fine dust particles (1-10 microns), difficult sedimentation when suspended in the air, complex components, high purification requirements (the requirements of most industries are less than 50mg/m < 3 >), and the like, is the key point and difficulty in controlling atmospheric pollution, and enters bag-type dust removal equipment after being cooled in a conventional mode for treating the waste gas. However, the investment of waste gas with high temperature and large air volume is more than million, the cost is extremely high, and the part of heat energy cannot be utilized, so that waste is caused; meanwhile, a large amount of sludge is generated in the sewage treatment process after metal smelting and is usually treated as hazardous waste, but due to the limitation of the sewage treatment process, the generated sludge has high water content and can further increase the treatment cost when being directly used as the hazardous waste.
The existing metal smelting furnace high-temperature flue gas and sludge treatment mode is mostly treated by chemical reagents, the dosage and the component proportion of the chemical reagents are difficult to grasp, and the treatment cost is easy to increase. Therefore, under the advocation of energy conservation and efficiency improvement, how to use high-temperature waste gas to dry sludge and then carry out waste gas treatment is a problem which is urgently needed to be solved so far, so that the treatment cost of waste gas is reduced, and the hazardous waste amount of sludge is reduced.
Disclosure of Invention
In order to solve the defects in the background art, the invention provides equipment and a process for treating high-temperature flue gas drying sludge of a metal smelting furnace, which can collect the high-temperature flue gas of the metal smelting furnace and dry the sludge so as to finish cooling and impurity removal of the high-temperature flue gas of the metal smelting furnace, reduce the amount of dangerous waste of the sludge and realize utilization and treatment of the high-temperature flue gas of the metal smelting furnace.
The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a metal smelting pot high temperature flue gas stoving sludge treatment equipment, includes the equipment main part, the equipment main part includes metal smelting pot high temperature flue gas collection device, mud drying device and water dust collector, be connected through admission line, outlet duct respectively between metal smelting pot high temperature flue gas collection device and the mud drying device, between mud drying device and the water dust collector, be connected through backflow pipeline between admission line and the outlet duct, backflow pipeline and the position department of inlet duct and outlet duct connection are equipped with first switching-over valve and second switching-over valve respectively, be equipped with on the outlet duct and be used for monitoring outlet duct gas temperature and advance and control first switching-over valve reaches the gas temperature sensor that the second switching-over of second switching-over valve carries out closed loop control.
Furthermore, the metal smelting furnace high-temperature flue gas collecting device comprises a dust removing support and a cyclone dust collector erected on the dust removing support, wherein the cyclone dust collector is connected with the metal smelting furnace to collect high-temperature flue gas, and is connected with the sludge drying device through the air inlet pipeline to provide the high-temperature flue gas to dry sludge.
Further, the sludge drying device comprises a sludge drying box and a sludge tray arranged in the sludge drying box, the sludge tray splits the inside of the sludge drying box into a lower-layer high-temperature area and an upper-layer low-temperature area, an air inlet communicated with the lower-layer high-temperature area is formed in the bottom of the sludge drying box, an air outlet communicated with the upper-layer low-temperature area is formed in the top of the sludge drying box, the air inlet is connected with an air inlet pipeline, and the air outlet is connected with an air outlet pipeline.
Further, the mud tray is detachable to be installed in the mud stoving incasement, mud stoving incasement wall both sides are provided with the boss, the recess has been seted up to mud tray both sides, the boss with the recess is slided and is joined in marriage and make the mud stoving case keeps airtight.
Further, a humidity sensor is installed in the sludge drying box, and the two sides of the sludge drying box are provided with a tray placing table for bearing a sludge tray.
Further, a sludge water receiving tray is installed below the sludge tray, water leakage holes are formed in the sludge tray, and the size of each water leakage hole is adjusted according to the viscosity degree of sludge.
Furthermore, water dust collector includes the water tank and installs the water tower on the water tank, open the water tower bottom has the air inlet, the air inlet pass through the pipeline of giving vent to anger with the air outlet is connected.
Furthermore, the air inlet pipeline is provided with an air speed lifting assembly, the air speed lifting assembly comprises an air speed lifting platform, and a motor and a blower which are installed on the air speed lifting platform, the blower is inserted into the inner wall of the air inlet pipeline, and the motor is connected with the blower to drive the blower.
The treatment process of the high-temperature flue gas drying sludge of the metal smelting furnace adopts the treatment equipment of the high-temperature flue gas drying sludge of the metal smelting furnace, and comprises the following steps:
if Tx is larger than or equal to T, the first reversing valve controls the first air inlet channel to be closed, the second air inlet channel is opened, meanwhile, the second reversing valve controls the first air outlet channel communicated with the air outlet channel through the return pipeline to be opened, and controls the second air outlet channel communicated with the water dust removal device to be closed, so that air which does not reach the allowable discharge temperature enters the second air inlet channel through the first air outlet channel, is accelerated by the over-speed lifting assembly in the second air inlet channel and then enters the sludge drying box, and the operation goes to the step 3;
if Tx is less than T, the first reversing valve controls the first air inlet channel to be opened, the second air inlet channel is closed, meanwhile, the second reversing valve controls the first air outlet channel communicated with the air outlet pipeline through the return pipeline to be closed, and controls the second air outlet channel communicated with the water dust removal device through the air outlet pipeline to be opened, so that the gas reaching the allowable discharge temperature enters the water dust removal device through the second air outlet channel, and the process goes to step 6;
and 6, dedusting the cooled gas in a water dedusting device, and discharging the gas after reaching the standard.
In conclusion, the beneficial effects of the invention are as follows:
1. the invention fully utilizes partial heat energy of high-temperature flue gas generated by the metal smelting furnace, combines the heat energy with the drying treatment process of sludge, and utilizes high-temperature waste gas to dry the sludge and then carry out waste gas treatment, thereby not only reducing the treatment cost of waste gas, but also reducing the hazardous waste amount of the sludge and reducing the treatment cost of the waste gas in the later period.
2. The dust-containing waste gas passes through the sludge tray, which is equivalent to the increase of a filtering system, the dust content is reduced, and the rear end is additionally provided with a water dust removal device with lower cost to completely meet the treatment requirement.
3. The invention provides a set of automatic sludge drying device for high-temperature flue gas treatment of a metal melting furnace, which avoids the contact of sludge, waste gas and the like with a human body in the waste gas treatment and sludge drying processes, and has the advantages of high automation degree, safety and high efficiency.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a high-temperature flue gas drying sludge treatment apparatus according to the present embodiment;
FIG. 2 is a sectional view of the sludge drying box according to the embodiment;
fig. 3 is a flow chart of the high-temperature flue gas drying sludge treatment process in the embodiment.
In the figure: 1. a cyclone dust collector; 2. an air intake duct; 3. a return line; 4. a sludge drying box; 5. a second directional control valve; 6. a gas temperature sensor; 7. an air outlet pipe; 8. a water tower; 9. a water tank; 10. a humidity sensor; 11. a sludge tray; 12. a tray placing table; 13. a blower; 14. a wind speed lifting platform; 15. a motor; 16. a first direction changing valve; 17. a dust removal bracket; 18. a sludge water pan; 19. an air inlet; 20. and (7) an air outlet.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following description of the present invention is provided in connection with the accompanying drawings.
It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. used herein are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. "plurality" means two or more unless otherwise specified.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in figure 1, a metal smelting pot high temperature flue gas stoving sludge treatment equipment, including the equipment main part, the equipment main part includes metal smelting pot high temperature flue gas collection device, sludge drying device and water dust collector, the high temperature flue gas that produces when making metal processing can be collected under high temperature flue gas collection device's effect, and dry sludge in sludge drying device, reduce the temperature of high temperature flue gas simultaneously, when making it reach emission standard's temperature, discharge after water dust collector removes dust again, this embodiment make full use of the heat energy of high temperature flue gas, not only the temperature of high temperature flue gas has been reduced, and utilize the temperature of flue gas to reduce the treatment cost of sludge, thereby the dangerous waste volume of sludge has been reduced, the treatment cost of later stage waste gas has also been reduced simultaneously, reach energy-conserving synergistic effect.
The metal smelting furnace high-temperature flue gas collecting device and the sludge drying device and the water dust removing device are respectively connected through the air inlet pipeline 2 and the air outlet pipeline 7, so that high-temperature flue gas collected by the high-temperature flue gas collecting device can be transmitted into the sludge drying device through the air inlet pipeline 2 for drying, and is transmitted into the water dust removing device through the air outlet pipeline 7 after the temperature is reduced for dust removal and then is discharged, and the treatment of the high-temperature flue gas is completed; the air inlet pipeline 2 and the air outlet pipeline 7 of the embodiment are also connected through the backflow pipeline 3, so that high-temperature flue gas which does not reach the emission temperature standard after the sludge is dried in the sludge drying device can enter the sludge drying device again through the backflow pipeline 3 to continuously release heat to dry the sludge, the temperature of the flue gas is reduced to the emission standard, and then the flue gas enters the water dust removal device through the air outlet pipeline 7 to remove dust and then is discharged.
In order to control the transmission direction of the high-temperature flue gas, thereby fully utilizing the heat of the high-temperature flue gas and avoiding the discharge of the flue gas which does not reach the emission standard, in the embodiment, the first reversing valve 16 and the second reversing valve 5 are respectively arranged at the positions where the return pipeline 3 is connected with the air inlet pipeline 2 and the return pipeline 3 is connected with the air outlet pipeline 7, wherein the first reversing valve 16 can control a first air inlet channel communicated with the air inlet pipeline 2 and a second air inlet channel communicated with the sludge drying device and the return pipeline 3 and the sludge drying device, and the second reversing valve 5 can control a first air outlet channel communicated with the air outlet pipeline 7 and a second air outlet channel communicated with the water dust removal device and the air outlet pipeline 7; high-temperature flue gas collected by the high-temperature flue gas collecting device enters the sludge drying device through the first gas inlet channel to dry and cool sludge, when the temperature of the flue gas does not reach the emission standard, the first reversing valve 16 and the second reversing valve 5 respectively control the second gas inlet channel and the first gas outlet channel to be opened, so that the flue gas is discharged from the first gas outlet channel, reenters the sludge drying device through the second gas inlet channel to continue to release heat and dry until the temperature is reduced to the emission standard, and is discharged to the water dust removing device through the second gas outlet channel.
Be equipped with on the pipeline 7 of giving vent to anger of this embodiment and be used for monitoring pipeline 7 gas temperature of giving vent to anger and then control the air temperature sensor of first switching-over valve 16 and the 5 switching-overs of second switching-over valve, this embodiment detects the temperature of the flue gas after giving out heat through air temperature sensor to the flow direction of closed-loop control flue gas avoids not reaching emission standard's flue gas outgoing, has also realized simultaneously the make full use of to the high temperature flue gas heat, reaches energy-conserving supplementary effect.
Specifically, as shown in fig. 1, the metal smelting furnace high-temperature flue gas collection device of this embodiment includes dust removal support 17 and cyclone 1 erected on dust removal support 17, and cyclone 1 is connected with the metal smelting furnace to the high-temperature flue gas of output in the metal smelting furnace is collected, and the export of cyclone 1 is connected with admission line 2 simultaneously, thereby makes the high-temperature gas of collection can transmit the stoving to the mud drying device in through admission line 2 and realize the mud.
As shown in fig. 1 and fig. 2, the sludge drying apparatus of this embodiment includes a sludge drying box 4 and a sludge tray 11 installed in the sludge drying box 4, the sludge tray 11 carries sludge to be dried, and separates the inside of the sludge drying box 4 into a lower high temperature region and an upper low temperature region, wherein an air inlet 19 communicated with the lower high temperature region is disposed at the bottom of the sludge drying box 4, an air outlet 20 communicated with the upper low temperature region is disposed at the top of the sludge drying box 4, the air inlet 19 is connected with the air inlet pipe 2, the air outlet 20 is connected with the air outlet pipe 7, so that high temperature flue gas can enter the lower high temperature region at the bottom of the sludge drying box 4 from the air inlet 19 to dry sludge carried on the sludge tray 11, flue gas after heat release cooling enters the upper low temperature region of the sludge drying box 4, and the sludge drying box 4 is discharged from the air outlet 20, thereby completing cooling of the high temperature flue gas and drying sludge.
As shown in fig. 2, the sludge tray 11 of the present embodiment is detachably installed in the sludge drying box 4, so as to take out the dried sludge and put the sludge to be dried in time; specifically, 4 inner wall both sides of the mud stoving case of this embodiment are provided with the boss, and 11 both sides of mud tray have seted up the recess, and when 11 installations of mud tray, the boss gomphosis is in the recess to slide along the recess, thereby make mud tray 11 pack into the mud stoving case 4 completely, and make mud stoving case 4 keep airtight, thereby improve the stoving effect of high temperature flue gas, prevent calorific loss.
The sludge drying box 4 of the embodiment is also internally provided with a humidity sensor 10 which can detect the humidity of the sludge in the sludge drying box 4, so that the dried sludge can be taken out in time and new sludge to be dried can be put in; wherein, for the convenience of getting to put mud, this embodiment has still all set up the tray that is used for bearing mud tray 11 in the both sides of mud stoving case 4 and has placed platform 12, when humidity that humidity transducer 10 detected mud reaches the emission specified value, alright take out this mud tray 11 and place on platform 12 is placed to one of them tray, and place the mud tray 11 that bears the mud of waiting to dry on the platform 12 with another tray and put into mud stoving case 4, it is convenient to change, can avoid the steam loss of flue gas.
As shown in fig. 2, a sludge water pan 18 is further installed below the sludge tray 11 of the embodiment, and water leakage holes are formed in the sludge tray 11, so that water on the sludge can automatically drip into the sludge water pan 18 through the water leakage holes, and the drying efficiency of the high-temperature flue gas is improved; in addition, the size of the water leakage hole is adjusted according to the viscosity degree of the sludge, so that the sludge can be prevented from falling into the sludge water pan 18 from the water leakage hole.
As shown in fig. 1, before the cooled flue gas is discharged to the outside, the flue gas needs to be dedusted by the water dedusting device, wherein the water dedusting device of this embodiment includes a water tank 9 and a water tower 8 installed on the water tank 9, the water tank 9 supplies water to the water tower 8, the bottom end of the water tower 8 is provided with an air inlet, the air inlet is connected with an air outlet 20 through an air outlet pipeline 7, the flue gas after heat release and cooling in the sludge drying box 4 enters the bottom of the water tower 8 through the air outlet pipeline 7, impurities of dust attached to the gas float in the water in the process of rising to the top of the water tower 8, so that the separation of smoke dust and gas is realized, and the high-temperature flue gas generated by the metal melting furnace is converted into gas meeting the emission standard to be discharged.
As shown in fig. 1, the air inlet pipe 2 of this embodiment is provided with an air speed lifting assembly, so that the air speed of the high-temperature flue gas collected by the high-temperature flue gas collecting device can be increased under the action of the air speed lifting assembly in the process of being transmitted to the sludge drying box 4, and the high-temperature flue gas can be blown to the sludge tray 11 from the lower-layer high-temperature zone, thereby improving the sludge drying effect; specifically, the wind speed lifting assembly of this embodiment includes that wind speed lifting platform 14 and motor 15 and the hair-dryer 13 of installing on wind speed lifting platform 14, and hair-dryer 13 pegs graft on intake duct 2 inner wall, provides power to the high temperature flue gas in the pipeline, and motor 15 is connected with hair-dryer 13 and is driven hair-dryer 13 and rotate to realize the acceleration of high temperature flue gas.
As shown in fig. 3, the embodiment further provides a high-temperature flue gas drying sludge treatment process for a metal melting furnace, and the high-temperature flue gas drying sludge treatment equipment comprises the following steps:
if Tx is larger than or equal to T, the first reversing valve 16 controls the first air inlet channel to be closed, the second air inlet channel is opened, meanwhile, the second reversing valve 5 controls the first air outlet channel communicated with the air outlet channel 7 and the return pipeline 3 to be opened, and controls the second air outlet channel communicated with the water dust removal device and the air outlet channel 7 to be closed, so that air which does not reach the allowable discharge temperature enters the second air inlet channel through the first air outlet channel, enters the sludge drying box 4 after being accelerated by the speed-increasing assembly in the second air inlet channel, and the step 3 is carried out;
if Tx is less than T, the first reversing valve 16 controls the first air inlet channel to be opened, the second air inlet channel to be closed, meanwhile, the second reversing valve 5 controls the first air outlet channel communicated with the air outlet pipeline 7 and the return pipeline 3 to be closed, and controls the second air outlet channel communicated with the water dust removing device and the air outlet pipeline 7 to be opened, so that the gas reaching the allowable discharge temperature enters the water dust removing device through the second air outlet channel, and the process goes to step 6;
and 6, dedusting the cooled gas in a water dedusting device, and discharging the gas after reaching the standard, so that the treatment of the high-temperature flue gas is completed.
In summary, in this embodiment, part of heat energy of the high-temperature flue gas generated by the metal melting furnace is fully utilized, and is linked with the drying treatment process of the sludge, and the high-temperature waste gas is used to dry the sludge and then perform the waste gas treatment, so that not only is the treatment cost of the waste gas reduced, but also the sludge hazardous waste amount is reduced, and the treatment cost of the waste gas in the later period is reduced; and the contact of sludge, waste gas and the like with a human body is avoided in the waste gas treatment and sludge drying processes, the automation degree is high, and the safety and the high efficiency are realized.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and modifications made by those skilled in the art based on the present invention all belong to the protection scope of the present invention.
Claims (9)
1. The utility model provides a metal smelting pot high temperature flue gas stoving sludge treatment equipment, includes equipment principal, its characterized in that: the equipment main body comprises a metal smelting furnace high-temperature flue gas collecting device, a sludge drying device and a water dust removing device, wherein the metal smelting furnace high-temperature flue gas collecting device is connected with the sludge drying device and the sludge drying device are connected with the water dust removing device through a gas inlet pipeline (2) and a gas outlet pipeline (7), the gas inlet pipeline (2) is connected with the gas outlet pipeline (7) through a backflow pipeline (3), a first reversing valve (16) and a second reversing valve (5) are arranged at positions where the backflow pipeline (3) is connected with the gas inlet pipeline (2) and the gas outlet pipeline (7), and a gas temperature sensor (6) used for monitoring the gas temperature of the gas outlet pipeline (7) to control the first reversing valve (16) and the second reversing valve (5) to perform closed-loop control is arranged on the gas outlet pipeline (7).
2. The metal melting furnace high-temperature flue gas drying sludge treatment equipment according to claim 1, characterized in that: the metal smelting furnace high-temperature flue gas collecting device comprises a dust removing support (17) and a cyclone dust collector (1) erected on the dust removing support (17), wherein the cyclone dust collector (1) is connected with the metal smelting furnace to collect high-temperature flue gas, and is connected with the sludge drying device through the air inlet pipeline (2) to provide the high-temperature flue gas to dry sludge.
3. The metal furnace high-temperature flue gas drying sludge treatment equipment according to claim 1, characterized in that: mud drying device includes mud stoving case (4) and installs mud tray (11) in mud stoving case (4), mud tray (11) are lower high-temperature region and upper low temperature zone with the inside split of mud stoving case (4), mud stoving case (4) bottom is equipped with air intake (19) with lower floor high-temperature zone intercommunication, and mud stoving case (4) top is equipped with air outlet (20) with upper low temperature zone intercommunication, air intake (19) with admission line (2) are connected, air outlet (20) with pipeline (7) are connected gives vent to anger.
4. The metal furnace high-temperature flue gas drying sludge treatment equipment according to claim 3, wherein: the sludge drying box is characterized in that the sludge tray (11) is detachably installed in the sludge drying box (4), bosses are arranged on two sides of the inner wall of the sludge drying box (4), grooves are formed in two sides of the sludge tray (11), and the bosses are matched with the grooves in a sliding mode and enable the sludge drying box (4) to be kept airtight.
5. The metal melting furnace high-temperature flue gas drying sludge treatment equipment according to claim 4, characterized in that: install humidity transducer (10) in mud stoving case (4), mud stoving case (4) both sides are equipped with the tray that is used for bearing mud tray (11) and place platform (12).
6. The metal furnace high-temperature flue gas drying sludge treatment equipment according to claim 4, wherein: the sludge water receiving tray (18) is installed below the sludge tray (11), water leakage holes are formed in the sludge tray (11), and the size of each water leakage hole is adjusted according to the viscosity degree of sludge.
7. The metal melting furnace high-temperature flue gas drying sludge treatment equipment according to claim 3, characterized in that: the water dust removal device comprises a water tank (9) and a water tower (8) installed on the water tank (9), wherein an air inlet is formed in the bottom end of the water tower (8), and the air inlet is connected with the air outlet (20) through an air outlet pipeline (7).
8. The metal furnace high-temperature flue gas drying sludge treatment equipment according to claim 1, characterized in that: the wind speed lifting assembly is arranged on the air inlet pipeline (2) and comprises a wind speed lifting platform (14), a motor (15) and a blower (13) which are installed on the wind speed lifting platform (14), the blower (13) is connected to the inner wall of the air inlet pipeline (2) in an inserting mode, and the motor (15) and the blower (13) are connected and driven to drive the blower (13).
9. A treatment process for high-temperature flue gas drying sludge of a metal smelting furnace is characterized by comprising the following steps: the high-temperature flue gas drying sludge treatment equipment for the metal melting furnace, which adopts any one of claims 1 to 8, comprises the following steps:
step 1, collecting high-temperature flue gas through a gas-collecting hood and entering a collecting pipe network, sending the collected high-temperature flue gas into a cyclone dust collector (1) through the collecting pipe network, and firstly performing partial dust sedimentation on the high-temperature flue gas entering the cyclone dust collector (1);
step 2, a first reversing valve (16) controls a first air inlet channel communicated with the sludge drying device and the air inlet pipeline (2) to be opened, and enables a second air inlet channel communicated with the sludge drying device and the return pipeline (3) to be closed, so that the settled high-temperature flue gas enters a sludge drying box (4) after being accelerated by an air speed lifting assembly in the first air inlet channel;
step 3, drying the sludge by the high-temperature flue gas entering the sludge drying box (4), and consuming the heat of the high-temperature flue gas so as to reduce the temperature of the high-temperature flue gas;
step 4, a dry-wet sensor in the sludge drying box (4) detects the humidity of the sludge in the sludge tray (11) at any time, when the humidity of the sludge reaches a discharge specified value or less, the sludge tray (11) is withdrawn to one of the tray placing tables (12), and meanwhile, the sludge tray (11) placed on the other tray placing table (12) enters the sludge drying box (4);
step 5, discharging the gas cooled in the sludge drying box (4) through a gas outlet pipeline (7), detecting the temperature Tx of the cooled gas by a gas temperature sensor (6) on the gas outlet pipeline (7), comparing the detection result with the temperature T of the allowable exhaust gas, and controlling a first reversing valve (5) and a second reversing valve (5) according to the comparison result:
if Tx is more than or equal to T, the first reversing valve (16) controls the first air inlet channel to be closed, the second air inlet channel is opened, meanwhile, the second reversing valve (5) controls the first air outlet channel of the backflow pipeline (3) and the air outlet pipeline (7) to be opened, controls the second air outlet channel of the air outlet pipeline (7) and the water dust removal device to be closed, enables air which does not reach the allowable discharge temperature to enter the second air inlet channel through the first air outlet channel, and enters the sludge drying box (4) after being accelerated by the over-speed lifting assembly in the second air inlet channel, and the step 3 is carried out;
if Tx is less than T, the first reversing valve (16) controls the first air inlet channel to be opened, the second air inlet channel to be closed, meanwhile, the second reversing valve (5) controls the first air outlet channel communicated with the air outlet pipeline (7) and the return pipeline (3) to be closed, and controls the second air outlet channel communicated with the water dust removal device and the air outlet pipeline (7) to be opened, so that the gas reaching the allowable discharge temperature enters the water dust removal device through the second air outlet channel, and the operation goes to step 6;
and 6, dedusting the cooled gas in a water dedusting device, and discharging the gas after reaching the standard.
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| CN109631598A (en) * | 2018-12-06 | 2019-04-16 | 海南中航特玻科技有限公司 | A kind of all-oxygen combustion glass kiln denitration system and method based on flue gas recirculating technique |
| CN217131873U (en) * | 2022-02-17 | 2022-08-05 | 云南兴建水泥有限公司 | Cement kiln denitration, waste heat utilization and dust pelletizing system |
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2023
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| CN104891769A (en) * | 2015-05-29 | 2015-09-09 | 常州振业机械设备有限公司 | Sludge drying incineration system and method |
| CN205090812U (en) * | 2015-09-29 | 2016-03-16 | 四川润泽东方环保工程有限公司 | Automatic switching control equipment is handled to flue gas |
| CN105347654A (en) * | 2015-11-02 | 2016-02-24 | 丁燕华 | Sludge drying method and dryer |
| CN206828346U (en) * | 2017-06-09 | 2018-01-02 | 重庆沙微谷环保节能科技有限公司 | Sludge waste heat cryogenic seal drying system |
| CN109631598A (en) * | 2018-12-06 | 2019-04-16 | 海南中航特玻科技有限公司 | A kind of all-oxygen combustion glass kiln denitration system and method based on flue gas recirculating technique |
| CN217131873U (en) * | 2022-02-17 | 2022-08-05 | 云南兴建水泥有限公司 | Cement kiln denitration, waste heat utilization and dust pelletizing system |
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