CN113145362B - Spray gun capable of being cleaned online and desulfurization wastewater zero-emission system - Google Patents
Spray gun capable of being cleaned online and desulfurization wastewater zero-emission system Download PDFInfo
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- CN113145362B CN113145362B CN202110001979.4A CN202110001979A CN113145362B CN 113145362 B CN113145362 B CN 113145362B CN 202110001979 A CN202110001979 A CN 202110001979A CN 113145362 B CN113145362 B CN 113145362B
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- rotating seat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides an online cleaning spray gun which comprises a spray gun barrel, a spray nozzle, a cleaning device and a cleaning device, wherein the spray nozzle comprises a guide pipe and a spray nozzle; also provides a desulfurization wastewater zero discharge system which comprises the spray gun. According to the invention, the motor of the control assembly drives the rotating seat and the cleaning head to synchronously rotate, and the cleaning head can rotationally clean dust or ash on the spray head, so that the ash is not aggregated, a large ash block is not formed to block the spray nozzle of the spray head, and the whole process can be completed on line.
Description
Technical Field
The invention relates to flue atomization treatment, in particular to an online cleaning spray gun and a desulfurization wastewater zero-emission system.
Background
Because the industrial flue gas pipeline generally contains a lot of dust, the long-term use of the spray gun in a flue can lead to the condition of dust accumulation, and finally, the spray gun can be crusted and caked.
The conventional spray gun is only fixed on the flue to spray, and the spray nozzle cannot be cleaned automatically, so that once dust is accumulated or caking is accumulated on the conventional spray gun, the conventional spray gun is only manually extracted for inspection and manual cleaning, and the conventional spray gun is very troublesome, if the conventional spray gun is not timely extracted for cleaning, the spray nozzle can be blocked, spraying cannot be performed, the process using requirements cannot be met, and a large amount of caking on the flue wall can be caused when the condition is serious, so that industrial accidents are caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an online cleaning spray gun and a desulfurization wastewater zero-emission system.
The invention is realized in the following way:
the invention provides an online cleaning spray gun which comprises a spray gun barrel, a spray nozzle, a cleaning device and a cleaning assembly, wherein the spray nozzle comprises a guide pipe capable of being communicated with the spray gun pipe, a spray nozzle arranged on the guide pipe, the cleaning device comprises a cleaning assembly arranged on the guide pipe and a control assembly used for controlling the cleaning assembly to rotate, the cleaning assembly comprises a rotating seat and a cleaning head capable of rotatably cleaning the outer surface of the spray nozzle, the rotating seat is rotatably arranged on the guide pipe and is coaxially arranged with the guide pipe, the cleaning head is arranged on the rotating seat, and the control assembly comprises a motor capable of driving the rotating seat to rotate around the axis of the motor.
Further, the cleaning head comprises a plurality of scrapers, each scraper is mounted on the rotating seat and is distributed at intervals along the circumferential direction of the rotating seat in sequence, and the cutter surface of each scraper is close to the outer surface of the spray head.
Further, the area of the spray head close to the spray nozzle is a spray nozzle area, the knife face of the scraper is provided with a first inclined surface matched with the outer surface corresponding to the spray nozzle area, and the first inclined surface is inclined towards the spray nozzle close to the spray nozzle.
Further, the spray head further comprises a reducing area and a main body area, the main body area is connected with the guide pipe, the reducing area is connected with the nozzle area and the main body area, and the reducing area is gradually reduced along the direction far away from the guide pipe; the surface of the scraper is also provided with a second inclined plane matched with the outer surface corresponding to the reducing area, the second inclined plane inclines towards the nozzle close to the spray head, and the inclined angle of the second inclined plane is smaller than that of the first inclined plane.
Further, the scraper comprises a plurality of cutter faces, and each cutter face is sequentially distributed at intervals along the axial direction of the spray head.
Further, a connecting flange is arranged on the gun barrel, the motor and the cleaning assembly are respectively located on two sides of the connecting flange, and the motor is connected with the rotating seat through a transmission assembly.
Further, the transmission assembly comprises a transmission wheel, a driven wheel and a transmission piece in transmission connection with the transmission wheel and the driven wheel, the transmission wheel is connected with an output shaft of the motor, and the driven wheel is fixedly connected with the rotating seat and coaxially arranged with the rotating seat.
Further, the cleaning assembly further comprises a cavity, the cavity is mounted on the gun barrel, the guide pipe penetrates through the cavity, the driven wheel is connected with the guide pipe through a bearing, and the bearing is located in the cavity.
Further, a drive shroud is included, the drive shroud being disposed along the lance tube, and the drive member being located within the drive shroud.
The embodiment of the invention also provides a desulfurization wastewater zero-emission system, which comprises a high-temperature flue and a desulfurization tower, wherein the high-temperature flue is connected with the desulfurization tower, the desulfurization wastewater zero-emission system further comprises a desulfurization wastewater concentration device and an agglomeration complexing agent preparation device, desulfurization wastewater generated by the desulfurization tower enters the desulfurization wastewater concentration device for concentration treatment, desulfurization wastewater concentrated by the desulfurization wastewater concentration device is guided into the agglomeration complexing agent preparation device to prepare an agglomeration complex solution, and the agglomeration complex solution is sprayed into the high-temperature flue through the spray gun.
The invention has the following beneficial effects:
in the spray gun, the cleaning device is arranged on the guide pipe of the spray nozzle, the cleaning assembly comprises the rotating seat and the cleaning head, when the spray gun is stretched into the flue, the motor of the control assembly can drive the rotating seat and the cleaning head to synchronously rotate, and the cleaning head can rotationally clean dust or ash on the spray nozzle, so that the ash and the dirt are not aggregated, and large ash blocks are prevented from being formed to block the spray nozzle of the spray nozzle.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an embodiment of an on-line cleanable spray gun;
FIG. 2 is a schematic diagram of the operation of an on-line cleanable spray gun according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of the spray gun provided by the embodiment of the invention after the cavity and the transmission shield of the spray gun are opened;
FIG. 4 is a schematic diagram of a combination of a transmission assembly and a cleaning assembly for an on-line cleaning spray gun according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a transmission assembly for an on-line cleanable spray gun according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a desulfurization wastewater zero-emission system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a desulfurization wastewater zero-discharge system provided by an embodiment of the present invention, which has two sets of desulfurization wastewater concentration devices.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-7, an embodiment of the present invention provides an online cleaning spray gun 1, including a spray gun barrel 12 and a spray nozzle 11, where the spray gun barrel 12 is a main working component of the spray gun 1, and is capable of spraying working medium, for example, when the spray gun is applied to a high temperature flue 3, the spray gun barrel 12 can spray desulfurization waste water, agglomerated composite solution, etc., the spray nozzle 11 is disposed at one end of the spray gun barrel 12, and the spraying direction of the spray nozzle 11 is generally perpendicular to the length direction of the spray gun barrel 12, so that when the spray gun is applied to the high temperature flue 3, the spray gun barrel 12 can extend from the radial direction of the high temperature flue 3, and the spraying direction can be forward (high temperature flue gas flow), and the other end of the spray gun barrel 12 is provided with two inlets, one is a liquid medium inlet, and the other is a compressed air inlet, and the liquid medium is atomized and sprayed from the spray nozzle 11 through the compressed air; the nozzle 11 comprises a conduit 111 and a spray head 112, the spray head 112 is arranged on the spray gun barrel 12 through the conduit 111, the conduit 111 and the spray head 112 are coaxially arranged, and liquid in the spray gun barrel 12 enters the spray head 112 through the conduit 111 for spraying; in addition, the spray gun 1 further comprises a cleaning device, the cleaning device comprises a cleaning component 13 and a control component 14, wherein the cleaning component 13 is a working component and is arranged on the guide pipe 111 for cleaning the position of the spray head 112, the control component 14 is a power component and can drive the cleaning component 13 to work, and in particular, the cleaning component 13 comprises a rotating seat 131 and a cleaning head 132, the rotating seat 131 is rotatably arranged on the guide pipe 111, and the cleaning head 132 is fixedly arranged on the rotating seat 131; the control assembly 14 includes a motor 141, which can drive the rotary base 131 to rotate around its own axis, and the rotary base 131 and the pipe 111 are coaxially disposed, that is, the motor 141 can drive the rotary base 131 to rotate relative to the pipe 111, and then the cleaning head 132 is driven by the rotary base 131 to synchronously and coaxially rotate, so as to clean the outer surface of the nozzle 112. In the invention, the cleaning component 13 is additionally arranged at the nozzle 11, the cleaning head 132 in the cleaning component 13 can clean dust or ash on the spray head 112 in a rotating mode, and the cleaning mode can be performed on line without affecting the normal operation of the spray gun 1. In addition, since the power source of the cleaning device is the motor 141, remote control can be performed, or a program can be set, the motor 141 intermittently operates according to a certain frequency, or a dust sensor (similar to the pm2.5 sensor in the purifier) can be provided at the nozzle 112, and when it is detected that dust on the outer surface of the nozzle 112 reaches a set threshold, the motor 141 starts to operate automatically, which is very convenient.
Referring to fig. 4 and 5, the structure of the cleaning head 132 is further refined, the cleaning head 132 includes a scraper 133, a blade surface 134 of the scraper 133 is close to an outer surface of the nozzle 112, cleaning on the outer surface of the nozzle 112 can be achieved through the blade surface 134 of the scraper 133, specifically, the number of the scraper 133 may be plural, and each scraper 133 is installed on the rotating seat 131 and is distributed at intervals in sequence along a circumferential direction of the rotating seat 131, which is generally three. Two types of scraping blades 133 and the rotating base 131 can be adopted, one type is an integral type, namely three scraping blades 133 are processed on the rotating base 131, the other type is a type that the scraping blades 133 are separated from the rotating base 131, and each scraping blade 133 is fixed on the rotating base 131 through a bolt. When the scraper 133 is connected with the rotating base 131 by a bolt, the scraper 133 can be selected in different forms according to the structure of the nozzle 112 to obtain better cleaning effect.
Further, the nozzle 112 is defined as a nozzle region, and the blade surface 134 of the scraper 133 has a first inclined surface matching with the corresponding outer surface of the nozzle region, and the first inclined surface is inclined toward the nozzle near the nozzle 112. In this embodiment, the end portion of the nozzle 112 is a nozzle area, the nozzle area near the nozzle is tapered in a direction away from the pipe 111, and the curved surface is smoothly tapered, so that the possibility of dust accumulation around the nozzle can be reduced, and meanwhile, the blade surface 134 of the scraper 133 rotationally cleans the nozzle area in the form of a first inclined surface, so that the cleaning effect is very good.
Continuing to optimize the above embodiment, the nozzle 112 further includes a reducing area and a main body area, where the main body area is connected with the pipe 111, the reducing area connects the main body area with the nozzle area, and of course, the three areas are integrally formed, one end of the main body area away from the nozzle area can be inserted into the pipe 111 to realize connection fixation between the nozzle 112 and the pipe 111, the reducing area is also tapered along the direction away from the pipe 111, correspondingly, the blade surface 134 of the scraper 133 further has a second inclined surface, the second inclined surface is matched with the outer surface of the reducing area, the second inclined surface also inclines towards the nozzle close to the nozzle 112, and the inclination angle of the second inclined surface is smaller than that of the first inclined surface. Specifically, the axial line of the blade surface 134 of the scraper 133 is similar to the axial line of the nozzle 112, so that a larger action area is provided between the scraper 133 and the nozzle 112, and the cleaning effect of the nozzle 112 can be improved.
Referring again to fig. 4 and 5, in another embodiment, the scraper 133 has a plurality of facets 134, each facet 134 being spaced apart in sequence along the axial direction of the spray head 112. In this embodiment, when the spray head 112 has a multi-stage stepped structure, the outer diameters of the stages of the spray head 112 are sequentially increased along the direction away from the spray nozzle, so that dust is easily deposited on the stepped surfaces, but is not easily deposited on other surface positions of the spray head 112, so that the plurality of knife surfaces 134 of the scraper 133 correspond to the stepped surfaces, and each knife surface 134 can clean dust deposition in a corresponding area by rotating. In an embodiment, the scraper 133 has three knife surfaces 134, corresponding to the three stepped surfaces of the nozzle 112 near the nozzle, each knife surface 134 may extend above the corresponding stepped surface.
In a further embodiment of the invention, a connecting flange 15 is provided on the lance tube 12, which connecting flange 15 is a mounting part of the lance 1, for example when the lance 1 is applied to a high temperature flue, one end of the lance tube 12 with the nozzle 11 extends into the high temperature flue 3, the other end of the lance tube is located outside the high temperature flue 3 for replenishing the lance tube 12 with fluid, the inner and outer sides of which are separated by the connecting flange 15, and the lance 1 is integrally fixed to the high temperature flue 3 by the connecting flange 15. The motor 141 and the cleaning assembly 13 are respectively located at two sides of the connecting flange 15, that is, when the spray gun 1 is applied to the high temperature flue, the motor 141 is located at the outer side of the high temperature flue, and the motor 141 is connected with the rotating seat 131 of the cleaning assembly 13 through the transmission assembly 16. In this embodiment, the motor 141 and the cleaning component 13 are separated by the connecting flange 15, so that the influence of the high-temperature environment of the high-temperature flue on the service life of the motor 141 can be avoided, and the maintenance of the motor 141 is facilitated. And the spray gun 1 can be applied to different types of high-temperature flues, such as a circular flue, a square flue and the like through the connecting flange 15, and can be installed along different angles according to requirements.
Referring to fig. 2-4, the above-mentioned transmission assembly 16 is further refined, and includes a transmission wheel 161, a driven wheel 162 and a transmission member 163, wherein the transmission wheel 161 is connected with an output shaft of the motor 141, and the transmission wheel 161 can be directly disposed on the output shaft of the motor 141, or can be connected with the output shaft of the motor 141 through a speed reducer, or other speed reducing transmission structures, the driven wheel 162 is fixedly connected with the rotating seat 131 and coaxially disposed, and of course, the driven wheel 162 is rotatably connected with the conduit 111, such as through a bearing 164, and the transmission member 163 is connected with the transmission wheel 161 and the driven wheel 162. When the motor 141 works, the driven wheel 162 and the driving wheel 161 can synchronously rotate through the driving part 163, so that the rotating seat 131 and the scraper 133 are driven to synchronously and coaxially work. For the transmission member 163, a wire rope is preferably used, so that the influence of the environment on the transmission member 163 can be reduced.
Referring to fig. 4, optimizing the above embodiment, the cleaning assembly 13 further comprises a cavity 17, the cavity 17 being a sealed space, mounted on the lance tube 12, through which the conduit 111 passes. In this embodiment, the bearing 164 is located in the cavity 17, and at least the connection portion between the driven wheel 162 and the driving member 163 is also located in the cavity 17, and because the driven wheel 162 is fixedly connected with the rotating seat 131, a part of the rotating seat 131 extends into the cavity 17 along the pipe 111, and at this time, the extending portion of the rotating seat 131 is connected with the pipe 111 and the cavity 17 by using the sealing ring 171, and the driven wheel 162 is integrally located in the cavity 17, or a part of the driven wheel 162 extends out of the cavity 17 along the pipe 111 and is connected with the rotating seat 131, and then the extending portion of the driven wheel 162 along the pipe 111 is also connected with the pipe 111 and the cavity 17 by using the sealing ring 171. Thus, the transmission 163 should also be protected, and the spray gun 1 further comprises a transmission shield 18, which transmission shield 18 is arranged along the gun barrel 12, the transmission 163 being located within the transmission shield 18. The transmission shield 18 is communicated with the cavity 17 so that the transmission member 163 extends into the cavity 17, and forms a relatively sealed space with the cavity 17, so that the influence of smoke dust and the like in the high-temperature flue on the bearing 164, the transmission member 163, the driven wheel 162 and the like can be effectively avoided, and the occurrence of clamping stagnation is avoided. Of course, in a preferred embodiment, the drive shield 18 passes through the connecting flange 15, i.e. protecting the drive 163 on both the inner and outer sides of the high temperature flue. In addition, a plurality of fixing blocks 181 are further arranged on the spray gun tube 12, the specific number of the fixing blocks 181 can be determined according to the length of the spray gun tube 12, the fixing blocks 181 are sequentially distributed at intervals along the length direction of the spray gun tube 12, each fixing block 181 can play a role in supporting and fixing the transmission shield 18, the integrity of the spray gun tube 12 and the transmission shield 18 in a high-temperature flue is stronger, and the spray gun tube 12 with different lengths and diameters can be adapted to the spray gun tube 12 with different diameters.
In addition, as the spray gun 1 provided by the embodiment of the invention, the spray gun further comprises a V-shaped rib plate, the V-shaped rib plate is positioned on the windward side of the spray gun barrel 12, the spray gun pipe 12 is positioned in a V-shaped groove of the V-shaped rib plate, and the opening size of the V-shaped groove is larger than the outer diameter of the spray gun pipe 12, so that the V-shaped rib plate forms a coating on the spray gun pipe 12 on the windward side of the spray gun pipe 12, the end part of the V-shaped rib plate can be fixedly connected with the connecting flange 15, and the inner wall of the V-shaped groove is fixedly connected with the cylindrical surface of the spray gun pipe 12. In this embodiment, the V-shaped rib plate is used for protecting the gun barrel 12, high-temperature flue gas cannot directly impact the gun barrel 12, and the V-shaped rib plate can be used for guiding the high-temperature flue gas through a V-shaped structure, so that the structural strength of the inner part of the high-temperature flue 3 of the spray gun 1 is further ensured.
Referring to fig. 6 and 7, the embodiment of the invention further provides a desulfurization wastewater zero-emission system, which comprises a high-temperature flue 3, a desulfurization tower 2 and a concentration device, wherein the high-temperature flue 3 is connected with the desulfurization tower 2, high-temperature flue gas in the high-temperature flue 3 enters the desulfurization tower 2 to be subjected to wet desulfurization, so that desulfurization wastewater can be generated, the high-temperature flue 3 is usually used for guiding out high-temperature flue gas generated in a boiler 31 or a kiln, and the high-temperature flue gas sequentially passes through a denitration device 34 to be subjected to denitration treatment, an air preheater 33, a dust remover 35 and the like, then enters the desulfurization tower 2 to be subjected to treatment, and finally is discharged to the outside atmosphere through a chimney 32. The liquid outlet of the desulfurizing tower 2 is communicated with the concentrating device, the desulfurizing wastewater generated by the desulfurizing tower 2 is led into the concentrating device for concentration, the concentrated desulfurizing wastewater discharged by the concentrating device can be sprayed into the high-temperature flue 3 through the spray gun 1, the high-temperature flue gas in the high-temperature flue 3 is used for evaporation and crystallization, and the gas discharged by the concentrating device enters the desulfurizing tower 2. In the invention, the spray gun 1 is adopted to spray the desulfurization wastewater concentrated by the concentrating tower 4 into the high-temperature flue 3, the desulfurization wastewater flows into the three-header 5 before the concentrated desulfurization wastewater is sprayed into the high-temperature flue 3, the precipitation and purification are carried out in the clarifying tank 51 of the three-header 5, the precipitate in the clarifying tank 51 is treated by the filter press 6 and then is specially treated, for example, the precipitate is transported by a truck, and the supernatant in the clarifying tank 51 can be sprayed into the high-temperature flue 3 for evaporation and crystallization. Therefore, in the whole process, zero emission of desulfurization wastewater can be realized.
Specifically, the concentrating device comprises a concentrating tower 4, which is mainly used for concentrating desulfurization wastewater generated in the desulfurizing tower 2, and is provided with a desulfurization wastewater inlet 41 and a concentrated solution outlet 42, wherein the desulfurization wastewater generated in the desulfurizing tower 2 can enter the concentrating tower 4 through the desulfurization wastewater inlet 41, and the concentrated desulfurization wastewater is discharged out of the concentrating tower 4 through the concentrated solution outlet 42; a concentration zone 43 is arranged in the concentration tower 4, the desulfurization wastewater entering the concentration tower 4 from the desulfurization wastewater inlet 41 is stored in the concentration zone 43, the concentration zone 43 is an inner space of the concentration tower 4, specifically a section of space extending upwards from the bottom of the concentration tower 4, the concentrated solution outlet 42 is positioned at the bottom of the concentration zone 43, the bottom of the concentration tower 4 is provided with a downward extending taper structure 44, the concentrated solution outlet 42 is positioned at the bottom corner of the taper structure 44, thereby being convenient for evacuating the desulfurization wastewater in the concentration tower 4, and the desulfurization wastewater inlet 41 is positioned at the upper end of the concentration tower 4, specifically the upper end of the concentration zone 43, generally the side wall of the concentration tower 4 and near the top; the concentration tower 4 is further provided with a high-temperature air inlet 45 and a low-temperature air outlet 46, wherein the high-temperature air inlet 45 is mainly used for introducing high-temperature flue gas in the high-temperature flue 3 into the desulfurization tower 2, specifically, the high-temperature flue gas after a dust remover 35 induced draft fan can be adopted, the high-temperature flue gas is used for carrying out heat exchange concentration on desulfurization wastewater in the concentration tower 4, the high-temperature flue gas is arranged on the side wall of the concentration tower 4 and is close to and higher than the concentrated solution outlet 42, the low-temperature air outlet 46 is used for discharging gas generated in the concentration tower 4 in the concentration process, the gas is usually high-temperature flue gas (the temperature is reduced after heat exchange) and steam which are introduced into the concentration tower 4 and is higher than the concentration zone 43, the top of the concentration tower 4 can be provided with an upwards extending taper structure 47, the low-temperature air outlet 46 is arranged at the vertex angle position of the taper structure 47, and the gas discharged by the low-temperature air outlet 46 is only low in temperature relative to the high-temperature air inlet 45, and is not low in temperature; a bubble generator 48 is further disposed in the concentration zone 43 of the concentration tower 4, and the bubble generator 48 is disposed at a height similar to the high temperature air inlet 45 and is in communication with the high temperature air inlet 45, i.e. the high temperature flue gas introduced into the concentration tower 4 by the high temperature air inlet 45 enters the bubble generator 48 to generate a large amount of bubbles in the concentration zone 43. In the present invention, the concentrating area 43 is different from the conventional desulfurizing waste water storing area in the concentrating tower 4, in the conventional concentrating tower 4, the desulfurizing waste water storing area is mainly used for storing the desulfurizing waste water after concentration, but in the present invention, the desulfurizing waste water does not enter the desulfurizing tower 2 in a spraying manner, but directly flows into the concentrating area 43, for example, when concentration is started, the desulfurizing waste water in the desulfurizing tower 2 flows into the concentrating area 43 through the desulfurizing waste water inlet 41, and when the desulfurizing waste water in the concentrating area 43 reaches a certain liquid level, high temperature flue gas is led into the concentrating tower 4 through the high temperature air inlet 45 to concentrate the desulfurizing waste water. Specifically, after the desulfurization wastewater is replenished in the concentration zone 43, the bubble generator 48 is immersed in the bottom position of the desulfurization wastewater, after the high-temperature flue gas is introduced, a large amount of bubbles are generated by the bubble generator 48, the high-temperature flue gas gradually floats up in the desulfurization wastewater in the form of bubbles, heat exchange can be directly carried out with the desulfurization wastewater in the process of floating up, the temperature of the desulfurization wastewater is increased, so that a large amount of moisture in the desulfurization wastewater is evaporated, and the low-temperature gas outlet 46 discharges the concentration tower 4, thereby achieving the purpose of concentrating the desulfurization wastewater. By adopting the mode, the high-temperature flue gas can be fully contacted with the desulfurization wastewater, no conduction medium exists between the high-temperature flue gas and the desulfurization wastewater, the heat exchange efficiency is very high for direct heat exchange, and the scaling problem in the traditional desulfurization wastewater concentration process can be effectively avoided. In general, when the desulfurization waste water is subjected to heat exchange and concentration, bubbles generated in the concentration process, particularly when the desulfurization waste water is subjected to spray concentration, a bubble removing structure is usually required to remove the bubbles so as to prevent the bubbles from carrying the desulfurization waste water, but in the invention, the concentration tower 4 adopts bubble heat exchange, and the discharged gas returns to the desulfurization tower 2.
Optimizing the above embodiment, a bubble buffer plate 49 is further disposed in the concentration area 43, the bubble buffer plate 49 horizontally separates the concentration area 43, and a plurality of ventilation holes are uniformly distributed on the bubble buffer plate 49, and the bubbles need to pass through the corresponding ventilation holes in the process of floating along the desulfurization wastewater, which indicates that the size of the ventilation holes is larger than that of the air holes on the bubble generator 48. In this embodiment, the bubble buffer plates 49 are horizontally arranged, the bubble buffer plates 49 divide the concentration area 43 into an upper space and a lower space, and of course, when the bubble buffer plates 49 are plural, each bubble buffer plate 49 is longitudinally and sequentially arranged at intervals along the concentration area 43, thus when the bubble buffer plates 49 are n, the concentration area 43 is divided into n+1, in a preferred scheme, the bubble buffer plates 49 are three, the three bubble buffer plates 49 divide the concentration area 43 into four spaces, the ventilation holes are uniformly distributed along the cross section of each bubble buffer plate 49, a large number of bubbles generated by the bubble generator 48 float up along the desulfurization wastewater, the ventilation holes on each bubble buffer plate 49 need to be sequentially passed through, and when the bubbles are relatively plural, each bubble needs to sequentially pass through the corresponding ventilation holes, so that the floating time of the bubbles can be delayed, and the heat exchange between the high-temperature flue gas and the desulfurization wastewater can be fully performed.
Continuing to optimize the above embodiment, the high temperature air inlets 45 are also provided with a plurality of high temperature air inlets 45, each high temperature air inlet 45 is uniformly arranged along the bottom circumference of the concentration zone 43, in fact, the high temperature air inlets are uniformly arranged along the circumference of the concentration tower 4, the bubble generators 48 are also arranged along the cross section of the concentration tower 4, the arrangement mode of the high temperature air inlets is similar to that of the bubble buffer plates 49, each high temperature air inlet 45 is communicated with the bubble generators 48, that is, the bubble generators 48 are air-inlet from a plurality of directions, and a plurality of bubble holes are uniformly distributed on the bubble buffer plates 49, in particular, the bubble generators 48 are uniformly distributed along the cross section of the concentration zone 43, so that bubbles can be generated on the whole cross section of the concentration zone 43, and the bubble generation positions are prevented from being too concentrated, and the desulfurization waste water in the concentration zone 43 can not be subjected to uniform heat exchange. In the present invention, the bubble generator 48 is disposed at a position near the bottom of the concentration area 43, specifically, at the top of the tapered structure of the concentration area 43, for example, when the tapered structure of the concentration area 43 is an inverted cone, the bubble generator 48 is disposed at the top of the inverted cone, and of course, the desulfurization wastewater can pass through the bubble generator 48 and enter the corresponding region of the tapered structure 44. In general, desulfurization waste water will form a certain sedimentation in the concentration zone 43, when the concentrate outlet 42 is not opened, the sediment of desulfurization waste water will be concentrated in the area corresponding to the tapered structure of the concentration zone 43, in addition, because the bubble generator 48 is connected with the high temperature air inlet 45, the temperature around the bubble generator 48 is highest in the concentration tower 4, that is, the concentration efficiency of desulfurization waste water in the area is highest, and then the concentration of desulfurization waste water at the bottom of the concentration zone 43 is very high, so that after the desulfurization waste water in the concentration zone 43 is concentrated for a period of time, the concentration of desulfurization waste water at the bottom of the concentration zone 43 is higher than the concentration of desulfurization waste water at the upper part of the concentration zone, in particular, along the height direction of the desulfurization waste water liquid level, the concentration of desulfurization waste water is lower and lower, and then the concentrate outlet 42 can be opened for a period of time, the desulfurization waste water with high concentration at the bottom is discharged, then the concentrate outlet 42 is closed, then the low concentration desulfurization waste water flows to the bubble generator 48, and new desulfurization waste water is continuously thrown into the concentration zone 43, so that the cycle can gradually concentrate the desulfurization waste water in the concentration zone 43 to the required concentration, and finally the desulfurization waste water is discharged from the concentrate outlet 42.
For the above-described concentration mode, three liquid levels may be set in the concentration area 43, which are a full liquid level, a medium liquid level, and a low liquid level in this order from top to bottom. Wherein, the full liquid level is the highest liquid level of the stored desulfurization wastewater in the concentration area 43, and the desulfurization wastewater liquid level in the concentration area 43 and the liquid level after adding new liquid (new desulfurization wastewater) are all full liquid levels when ventilation and concentration are started; the medium liquid level is the liquid level when the desulfurization waste water in the concentration zone 43 needs to be discharged after the desulfurization waste water in the lower part is concentrated, namely, when the desulfurization waste water in the concentration zone 43 is reduced from the full liquid level to the medium liquid level, the concentrated liquid outlet 42 is opened, and the high-concentration desulfurization waste water in the bottom part is discharged; the low liquid level is the liquid level of the high-concentration desulfurization waste water in the concentration zone 43 after being discharged, namely, when the desulfurization waste water in the concentration zone 43 is reduced from the medium liquid level to the low liquid level, the concentrated liquid outlet 42 is closed, meanwhile, the desulfurization waste water inlet 41 is opened, new liquid is supplemented into the concentration zone 43 to reach the full liquid level, and the concentration period in the concentration tower 4 is completed. Of course, the full, middle and low liquid levels are all detected by the liquid level sensor 410 to control the corresponding actions, which can be set according to the actual needs. In the invention, the concentration tower 4 adopts intermittent liquid feeding and discharging, and liquid feeding and discharging are controlled by a liquid level sensor, wherein concentration multiplying power= (liquid discharging/(evaporation amount+liquid discharging) is equal to the difference between full liquid level and medium liquid level, and liquid discharging is equal to the difference between medium liquid level and low liquid level, so that the whole process is controllable in concentration multiplying power and very convenient.
Referring to fig. 7, in a preferred embodiment, the high temperature inlet 45 of the concentrating column 4 communicates with the high temperature flue 3. Specifically, the high-temperature air inlet 45 is communicated with the high-temperature flue 3 behind the dust remover 35, namely, the high-temperature flue 3 between the dust remover 35 and the desulfurizing tower 2, and the high-temperature flue gas after being purified and dedusted by the dust remover 35 can enter the concentrating tower 4 through the high-temperature air inlet 45. In this embodiment, a fan 36 is disposed in the high temperature flue 3 between the dust remover 35 and the desulfurizing tower 2, the high temperature flue gas is led into the desulfurizing tower 2 by the fan 36, meanwhile, a branch pipe 37 is also connected to the section of the high temperature flue 3, the branch pipe 37 extends to the high temperature air inlet 45, and another fan 371 is disposed in the branch pipe 37, therefore, a part of the high temperature flue gas discharged from the dust remover 35 can directly enter the desulfurizing tower 2, and a part of the high temperature flue gas can enter the concentrating tower 4 via the branch pipe 37 to exchange heat with the desulfurizing wastewater, of course, the fan 371 in the branch pipe 37 should adopt a pressurized fan, so that the flue gas pressure at the high temperature air inlet 45 should be higher than the gas pressure at the low temperature air outlet 46. Generally, the dust remover 35 is an electrostatic dust remover 35 and a cloth bag dust remover 35, the content of particles in high-temperature flue gas purified by the dust remover 35 is very low, the temperature of the particles can reach about 110 ℃, the temperature of desulfurization waste water discharged into the concentration tower 4 by the desulfurization tower 2 is generally 45 ℃, namely, in the concentration tower 4, the high-temperature flue gas at about 110 ℃ and the desulfurization waste water at 45 ℃ are adopted for direct heat exchange, so that the energy loss is reduced, the temperature difference between the high-temperature flue gas and the desulfurization waste water is relatively large, the heat exchange efficiency is high, and the flue gas heat utilization rate is improved. In addition, a thermometer 411 is disposed in the concentration tower 4, for detecting the temperature of each section in the concentration tower 4, for example, detecting the temperature of the gas discharged from the concentration tower 4 at the position where the top of the concentration tower 4 is close to the low temperature gas outlet 46, and detecting the temperature of the desulfurization waste water near the bubble generator 48 when the concentration heat exchange is performed at the position where the concentration area 43 is close to the bubble generator 48, if necessary, detecting the temperature of the high temperature flue gas at the high temperature gas inlet 45, and by detecting the temperature at these positions, the temperature can be used to determine the heat exchange condition between the bubbles and the desulfurization waste water in the concentration tower 4, and further can be used to adjust the flow rate of the high temperature flue gas in the branch pipe 37, so as to ensure the concentration efficiency. Continuing to optimize the embodiment, two groups of concentrating devices are arranged, the connecting modes of the two groups of concentrating devices are parallel, the connecting arrangement of the high-temperature air inlet 45, the low-temperature air outlet 46, the desulfurization wastewater inlet 41 and the concentrated solution outlet 42 of the two groups of concentrating devices are the same, the two groups of concentrating devices are connected with corresponding pipelines in the zero-emission system, two working modes can be adopted for the two groups of concentrating devices, one group of concentrating devices is one standby, and when one group of concentrating devices works, the other group of concentrating devices does not work, can be used for maintenance or cleaning, and ensures that the zero-emission system can continuously work; in another mode, particularly when the desulfurization waste water discharge amount in the desulfurization tower 2 is relatively large, the two groups of concentrating devices work simultaneously to rapidly concentrate the desulfurization waste water generated in the desulfurization tower 2, thereby ensuring the concentration efficiency.
Further, the zero emission system further comprises an agglomeration complex preparation device 7, the desulfurization wastewater discharged from the concentrated solution outlet 42 is treated by a three-header 5 and then is introduced into the agglomeration complex preparation device 7, namely, the supernatant of a clarifier 51 in the three-header 5 is introduced into the agglomeration complex preparation device 7, the desulfurization wastewater and the agglomeration complex are mixed according to mass percent to prepare an agglomeration complex solution, then the agglomeration complex solution is sprayed into a high-temperature flue 3 by adopting a spray gun 1, wherein the high-temperature flue 3 refers to the high-temperature flue 3 in front of a dust remover 35, namely, the high-temperature flue 3 between a boiler 31 or a kiln and the dust remover 35, and particularly, spray guns 1 are arranged in the front and the rear of a denitration device 34, the agglomeration complex solution is sprayed into the front and the rear of the denitration device 34, and the denitration device 3The temperature of the high-temperature flue gas in the high-temperature flue 3 before 45 can reach 400-500 ℃, the temperature of the high-temperature flue gas in the high-temperature flue 3 after the pin removal device 8 can reach 330-360 ℃, and the agglomerated composite solution can be evaporated rapidly after being sprayed into the high-temperature flue 3 in the temperature range, so that water is evaporated into water vapor which enters the dust remover 35 or the desulfurizing tower 2 along with the flue gas or is discharged into the atmosphere. The vast majority of the various salts in the agglomerated composite liquid enter the dust remover 35 along with the fly ash and the minority enters the desulfurizing tower 2 (negligible). Wherein the agglomeration composite solution can inhibit the activity of Cl ions in the desulfurization wastewater on one hand, solve the problem of corrosion of the desulfurization wastewater to the high-temperature flue 3 and equipment due to evaporation in the high-temperature flue 3, and can trap SO in the high-temperature flue gas on the other hand 3 Or other particulate matter to purify the high temperature flue gas. Based on this situation, the air preheater 33 in the rear flue of the denitration device 34 can adopt the low-cost material Q355, and the anticorrosion cost is relatively low.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The utility model provides a but online cleaning spray gun, includes spray gun barrel and nozzle, the nozzle include can with spray gun pipe switch on the pipe and install shower nozzle on the pipe, its characterized in that: the cleaning device comprises a cleaning component arranged on the guide pipe and a control component used for controlling the cleaning component to rotate, the cleaning component comprises a rotating seat and a cleaning head capable of rotatably cleaning the outer surface of the spray head, the rotating seat is rotatably arranged on the guide pipe and is coaxially arranged with the guide pipe, the cleaning head is arranged on the rotating seat, and the control component comprises a motor capable of driving the rotating seat to rotate around the axis of the motor; the cleaning device comprises a gun barrel, and is characterized in that a connecting flange is arranged on the gun barrel, a motor and a cleaning assembly are respectively located on two sides of the connecting flange, the motor is connected with a rotating seat through a transmission assembly, the transmission assembly comprises a transmission wheel, a driven wheel and a transmission part which is connected with the transmission wheel and the driven wheel, the transmission wheel is connected with an output shaft of the motor, the driven wheel is fixedly connected with the rotating seat and coaxially arranged with the rotating seat, the cleaning assembly further comprises a cavity, the cavity is arranged on the gun barrel and the guide pipe penetrates through the cavity, the driven wheel is connected with the guide pipe through a bearing, the bearing is located in the cavity, a part of the rotating seat structure extends into the cavity along the guide pipe, and a sealing ring is connected between an extending part of the rotating seat and the guide pipe and between the cavity.
2. The on-line cleanable spray gun of claim 1, wherein: the cleaning head comprises a plurality of scrapers, each scraper is mounted on the rotating seat and is distributed at intervals along the circumference of the rotating seat in sequence, and the cutter surface of each scraper is close to the outer surface of the spray head.
3. The on-line cleanable spray gun of claim 2, wherein: the area of the spray head close to the spray nozzle is a spray nozzle area, the cutter surface of the scraper is provided with a first inclined surface matched with the outer surface corresponding to the spray nozzle area, and the first inclined surface inclines towards the spray nozzle close to the spray nozzle.
4. An on-line cleanable spray gun according to claim 3, wherein: the spray head also comprises a reducing area and a main body area, wherein the main body area is connected with the guide pipe, the reducing area is connected with the nozzle area and the main body area, and the reducing area is gradually reduced along the direction away from the guide pipe; the surface of the scraper is also provided with a second inclined plane matched with the outer surface corresponding to the reducing area, the second inclined plane inclines towards the nozzle close to the spray head, and the inclined angle of the second inclined plane is smaller than that of the first inclined plane.
5. The on-line cleanable spray gun of claim 2, wherein: the scraper comprises a plurality of cutter faces, and each cutter face is sequentially distributed at intervals along the axial direction of the spray head.
6. The on-line cleanable spray gun of claim 1, wherein: the spray gun also comprises a transmission shield, wherein the transmission shield is arranged along the spray gun pipe, and the transmission piece is positioned in the transmission shield.
7. The utility model provides a desulfurization waste water zero release system, includes high temperature flue and desulfurizing tower, high temperature flue with desulfurizing tower is connected, its characterized in that: the desulfurization waste water treatment device is characterized by further comprising a desulfurization waste water concentration device and an agglomeration complexing agent preparation device, wherein desulfurization waste water generated by the desulfurization tower enters the desulfurization waste water concentration device for concentration treatment, the desulfurization waste water concentrated by the desulfurization waste water concentration device is led into the agglomeration complexing agent preparation device to prepare an agglomeration complexing solution, and the agglomeration complexing solution is sprayed into the high-temperature flue through the spray gun according to any one of claims 1-6.
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| CN202110001979.4A CN113145362B (en) | 2021-01-04 | 2021-01-04 | Spray gun capable of being cleaned online and desulfurization wastewater zero-emission system |
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| CN113145362B true CN113145362B (en) | 2023-08-04 |
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| CN114178101B (en) * | 2021-10-26 | 2023-04-07 | 武汉天空蓝环保科技有限公司 | Online self-cleaning spray gun and desulfurization wastewater zero discharge system |
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