CN214717792U - Self-cleaning nozzle, spray gun and desulfurization wastewater zero discharge system - Google Patents

Abstract

The utility model provides a self-cleaning nozzle, which comprises a conduit which can be communicated with a spray gun tube and a spray head arranged on the conduit, wherein the conduit is coaxially arranged with the spray head, the conduit is also provided with a cleaning component, the cleaning component comprises a transmission fan and a cleaning head arranged on the transmission fan, the transmission fan can be rotatably arranged on the conduit, the cleaning head comprises a scraper, and the surface of the scraper is close to the outer surface of the spray head; also provides a spray gun, comprising the spray nozzle; still provide a desulfurization waste water zero release system, including above-mentioned spray gun. The utility model discloses in, it is rotatory around the shower nozzle to drive the cleaning head by driving fan, because the scraper knife face of cleaning head is close to the surface of shower nozzle, then when driving fan is rotatory, can carry out rotatory clearance to dust or ash dirt on the shower nozzle, makes the ash dirt not coalesce to form big ash cake and plug up the spout of shower nozzle, whole process need not extra power.

Description

Self-cleaning nozzle, spray gun and desulfurization wastewater zero discharge system

Technical Field

The utility model relates to a flue atomization treatment especially relates to a automatically cleaning nozzle, spray gun and desulfurization waste water zero discharge system.

Background

Because the industrial flue gas pipeline generally contains a lot of dust, the long-term use of the spray gun in the flue can cause the condition of dust deposition, and finally the spray gun can be incrusted and agglomerated.

Conventional spray gun only fixes and sprays on the flue, and the nozzle can not carry out automatic clearance, so in case deposition or caking of conventional spray gun, just only artifical manual extraction comes out inspection, manual clearance, and is very troublesome, if do not in time extract the spray gun and clear up, can lead to nozzle department to block up, can't spray, can not reach the requirement of technology use, can lead to a large amount of caking of flue wall when the condition is serious moreover, causes industrial accident.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a automatically cleaning nozzle, spray gun and desulfurization waste water zero discharge system.

The utility model discloses a realize like this:

the utility model provides a self-cleaning nozzle, include the pipe that can switch on with the spray gun pipe and install in shower nozzle on the pipe, the pipe with the coaxial setting of shower nozzle, in still be provided with clean subassembly on the pipe, clean subassembly include transmission fan and install in clearance head on the transmission fan, transmission fan is rotatable install in on the pipe, just clearance head includes the scraper, the knife face of scraper is close to the surface of shower nozzle.

Furthermore, the cleaning head also comprises a rotating support, the rotating support is fixedly arranged on the transmission fan, a plurality of scrapers are arranged on the rotating support, and the scrapers are sequentially distributed at intervals along the circumferential direction 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 face matched with the outer surface corresponding to the spray nozzle area, and the first inclined face inclines towards the spray nozzle close to the spray nozzle.

Furthermore, the nozzle also 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 knife face of the scraper is also provided with a second inclined face matched with the outer surface corresponding to the reducing area, the second inclined face inclines towards the nozzle close to the spray head, and the inclination angle of the second inclined face is smaller than that of the first inclined face.

Further, the driving fan includes the installation department and set up in a plurality of windward blades on the installation department, each windward blade follows the circumference of installation department interval distribution in proper order, the installation department pass through the bearing with pipe rotatable coupling.

Furthermore, a dust guard is fixed on the mounting part and is positioned on the windward side of the bearing.

Further, still including the installation be fixed in fixed cover of bottom on the pipe and the cover locate on the pipe and with the fixed cover of bottom encloses the swivel bearing cover that closes and form the cavity, in be provided with at least a set of in the cavity the bearing, the swivel bearing cover pass through the bearing with pipe rotatable coupling, just the transmission fan installation is fixed in on the swivel bearing cover.

Further, still including two wind end caps of relative setting, wind end cap including can with the first cooperation portion of the cylinder complex of spray gun pipe and with the second cooperation portion of the cylinder complex of pipe, the partial structure of pipe is located two between the second cooperation portion, the fixed cover support in bottom is fixed in two on the second cooperation portion.

The embodiment of the utility model provides a still provide a spray gun, including spray gun pipe and foretell nozzle, the pipe set up perpendicularly in on the spray gun pipe.

The embodiment of the utility model provides a desulfurization waste water zero discharge system is still provided, including high temperature flue and desulfurizing tower, the high temperature flue with the desulfurizing tower is connected, still includes desulfurization waste water enrichment facility and reunion complexing agent preparation facilities, desulfurization waste water enrichment facility, the desulfurization waste water that the desulfurizing tower produced gets into concentrated processing in the desulfurization waste water enrichment facility, just desulfurization waste water after the desulfurization waste water enrichment facility is concentrated is leading-in preparation reunion composite solution in the complexing agent preparation facilities, reunion composite solution spouts through above-mentioned spray gun in the high temperature flue.

The utility model discloses following beneficial effect has:

the utility model discloses an among the spray gun, be provided with clean subassembly on the pipe of nozzle, wherein clean subassembly includes transmission fan and cleaning head, when stretching into the spray gun in the flue, the flue gas effect can order about transmission fan rotation down in the flue, and then it is rotatory around the shower nozzle to drive the cleaning head by transmission fan, because the scraper knife face of cleaning head is close to the surface of shower nozzle, then when transmission fan is rotatory, can carry out rotatory clearance to dust or grime on the shower nozzle, make the grime not to gather, in order to form big ash tray and plug up the spout of shower nozzle. In the cleaning process, the smoke in the flue is used as driving power for driving the transmission fan to rotate, extra power is not needed, and the cleaning device is very convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a spray gun according to an embodiment of the present invention;

fig. 2 is a top view of a spray gun according to an embodiment of the present invention;

fig. 3 is a schematic working diagram of a self-cleaning nozzle provided in an embodiment of the present invention;

fig. 4 is an exploded view of a self-cleaning nozzle according to a first embodiment of the present invention;

fig. 5 is a cross-sectional view of a self-cleaning nozzle according to a first embodiment of the present invention;

fig. 6 is an exploded view of a self-cleaning nozzle according to a second embodiment of the present invention;

fig. 7 is a cross-sectional view of a self-cleaning nozzle according to a second embodiment of the present invention;

FIG. 8 is a schematic structural view of a desulfurization wastewater zero-discharge system provided by an embodiment of the present invention;

fig. 9 is a schematic structural diagram of the desulfurization wastewater zero discharge system provided by the embodiment of the present invention having two sets of desulfurization wastewater concentrating devices.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 9, an embodiment of the present invention provides a self-cleaning nozzle 11, which can be applied to a spray gun 1, and particularly can be applied in cooperation with a spray gun tube 12 of the spray gun 1, and therefore, an embodiment of the present invention should also provide a spray gun 1, in which the spray gun tube 12 is a main working component of the spray gun 1, and can eject a working medium, such as desulfurization waste water, agglomeration composite solution, etc. when it is applied to a high-temperature flue 3, the spray nozzle 11 is disposed at one end of the spray gun tube 12, and the ejection direction of the spray nozzle 11 is generally perpendicular to the length direction of the spray gun tube 12, so that when it is applied to the high-temperature flue 3, the spray gun tube 12 can be extended from the radial direction of the high-temperature flue 3, and the spray direction can be a forward direction (high-temperature flue gas flow direction), and the other end of the spray gun tube 12 is provided with two inlets, one of which is a liquid medium inlet, one is a compressed air inlet, and the liquid medium is atomized and sprayed out from the nozzle 11 by the compressed air; the nozzle 11 comprises a conduit 111 and a spray head 112, the spray head 112 is mounted on the lance tube 12 through the conduit 111, the conduit 111 is arranged coaxially with the spray head 112, and the liquid in the lance tube 12 enters the spray head 112 through the conduit 111 to be sprayed; the guide pipe 111 is further provided with a cleaning assembly 13 for cleaning the position of the spray head 112, specifically, the cleaning assembly 13 includes a transmission fan 131 and a cleaning head 132, wherein the transmission fan 131 is rotatably installed on the guide pipe 111, the cleaning head 132 is installed and fixed on the transmission fan 131, that is, the transmission fan 131 can rotate relative to the guide pipe 111, and then the transmission fan 131 drives the cleaning head 132 to synchronously rotate, so as to refine the structure of the cleaning head 132, the cleaning head 132 includes a scraper 133, a blade face of the scraper 133 is close to the outer surface of the spray head 112, and the cleaning of the outer surface of the spray head 112 can be realized through the blade face of the scraper 133. The utility model discloses in, transmission fan 131 can be rotatory around self axis under the exogenic action, wherein transmission fan 131, pipe 111 and shower nozzle 112 are all coaxial to be set up, then when transmission fan 131 is rotatory, can drive cleaning head 132 around the axis synchronous revolution of shower nozzle 112, and because the knife face of scraper 133 is close to the surface of shower nozzle 112, then at the rotatory in-process of scraper 133, can play cleaning action to the surface of shower nozzle 112, and when using spray gun 1 with this kind of structure to high temperature flue 3 in, it is rotatory to order about transmission fan 131 through the flow flue gas in high temperature flue 3, and then reach the effect of clean shower nozzle 112. Therefore, the utility model discloses in, spray gun 1 of this kind of structure can realize the automatically cleaning through the flue gas, and the flue gas is clean power promptly, need not to set up extra power, and is very convenient. Furthermore, the nozzle 11 is a separate part of the spray gun 1, which can be used in different spray guns 1, in combination with different configurations of the gun barrel 12, such as single fluid spray gun 1, dual fluid spray gun 1.

Referring to fig. 4-7, in order to optimize the above embodiment, the cleaning head 132 further includes a rotating bracket 134, the rotating bracket 134 is fixed on the driving fan 131, a plurality of scrapers 133 are disposed on the rotating bracket 134, and each scraper 133 is sequentially spaced along the circumferential direction of the nozzle 112. In this embodiment, the driving fan 131 can drive the plurality of scrapers 133 to rotate synchronously, and of course, each scraper 133 should be located on the same circumference, and the outer surface of the nozzle 112 can be cleaned by the plurality of scrapers 133. Generally, three scrapers 133 are provided on the rotating bracket 134, and the three scrapers 133 are sequentially and uniformly distributed. The scraper 133 and the rotating bracket 134 can be in an integral form, namely three scrapers 133 are machined on the rotating bracket 134, and the scraper 133 and the rotating bracket 134 are in a split form, and each scraper 133 is fixed on the rotating bracket 134 through bolts or welding. The rotating bracket 134 and the transmission fan 131 may also be connected by two connection methods, one of which is that the rotating bracket 134 is connected with the transmission fan 131 by a bolt, and the other is that the transmission bracket is connected with the transmission fan 131 by a thread, specifically, the transmission bracket has a middle through hole (for the conduit 111 to pass through) with a partial structure extending into the transmission fan 131, the part of the transmission bracket extending into the transmission fan 131 has an external thread, and the inner wall of the middle through hole of the transmission fan 131 has an internal thread.

Referring to fig. 5, further, an area of the nozzle head 112 near the nozzle opening is defined as a nozzle opening area 113, and the blade surface of the scraper 133 has a first inclined surface 135 matched with the outer surface corresponding to the nozzle opening area 113, and the first inclined surface 135 is inclined toward the nozzle opening near the nozzle head 112. In this embodiment, the end of the nozzle 112 is a nozzle area 113, the nozzle 112 area near the nozzle is tapered in a direction away from the guide tube 111, and the curved surface is smoothly tapered, so that the possibility of dust deposition around the nozzle can be reduced, and meanwhile, the blade surface of the scraper 133 performs rotary cleaning on the nozzle area 113 in the form of the first inclined surface 135, so that the cleaning effect is very good.

Referring to fig. 5 again, in order to further optimize the above embodiment, the nozzle 112 further includes a reducing region 114 and a main body region 115, wherein the main body region 115 is connected to the conduit 111, the reducing region 114 is connected to the main body region 115 and the nozzle region 113, the reducing region 114 and the nozzle region 113 are integrally formed, an end of the main body region 115 far away from the nozzle region 113 can be inserted into the conduit 111 to achieve connection and fixation between the nozzle 112 and the conduit 111, the reducing region 114 is tapered along a direction far away from the conduit 111, correspondingly, the blade surface of the scraper 133 further has a second inclined surface 136, the second inclined surface 136 is matched with an outer surface of the reducing region 114, the second inclined surface 136 is also inclined toward the nozzle close to the nozzle 112, and an inclination angle of the second inclined surface 136 is smaller than an inclination of the first inclined surface 135. Specifically, the line shape of the axial section of the blade surface of the scraper 133 is similar to the line shape of the axial section of the nozzle 112, so that a larger action area can be formed between the scraper 133 and the nozzle 112, and the cleaning effect of the nozzle 112 can be improved.

Referring to fig. 4, 6 and 8, further, the driving fan 131 provided by the embodiment of the present invention includes a mounting portion 138 and a windward blade 137, a middle through hole of the driving fan 131 is located on the mounting portion 138, and the mounting portion 138 is rotatably connected to the guide tube 111 through a bearing 139. The windward blades 137 are generally plural, each windward blade 137 is disposed on the mounting portion 138 and is uniformly distributed at intervals along the circumferential direction of the mounting portion 138, and each windward blade 137 extends along the radial direction of the mounting portion 138. Generally, when the spray gun 1 is applied to the high-temperature flue 3, the flow direction of the flue gas is the same as the axial direction of the mounting portion 138, so that the windward side of each windward blade 137 should be inclined, specifically, a certain included angle is formed between the windward side and the axial direction of the mounting portion 138, and the vertical direction is avoided. Naturally, different high-temperature flues 3 such as the round high-temperature flue 3 and the square high-temperature flue 3 are adopted according to different application forms of the spray gun 1, and the spray gun 1 can be horizontally installed, vertically installed and obliquely installed, so that the aim of rotatably cleaning the spray nozzle 11 is fulfilled.

As for the driving fan 131, there are various forms of mounting structures between it and the duct 111:

example one

Referring to fig. 4 and 5, the driving fan 131 is directly connected to the duct 111 by using a bearing 139, specifically, the bearing 139 is disposed in the middle through hole of the mounting portion 138, and the bearing 139 is sleeved on the duct 111, so as to achieve a rotatable connection relationship between the driving fan 131 and the duct 111. Generally, the dust guard 140 is fixed on the mounting portion 138, the dust guard 140 is also in a ring structure, the guide tube 111 passes through the dust guard 140, a gap between the dust guard 140 and the guide tube 111 is relatively small, and the dust guard 140 is located between the transmission fan 131 and the barrel 12, so that the dust guard 140 is located on the windward side of the transmission fan 131, and the dust guard 140 can effectively prevent dust in smoke from entering the bearing 139 and further affecting the transmission effect of the bearing 139. In addition, a bearing 139 limiting screw 115 is disposed on the duct 111, and is located in the middle through hole of the transmission fan 131 and on the leeward side of the bearing 139, and the bearing 139 limiting screw 115 can limit the axial movement of the bearing 139 along the duct 111.

Example two

Referring to fig. 6 and 7, the nozzle 11 further includes a bottom fixing sleeve 116 and a rotary bearing sleeve 117, wherein the bottom fixing sleeve 116 is fixed on the guide tube 111, that is, the bottom fixing sleeve 116 is a fixed member, the rotary bearing sleeve 117 is rotatably connected with the guide tube 111, and is a rotating member, a cavity is formed by the bottom fixing sleeve 116 and the rotary bearing sleeve 117, and the above-mentioned bearing 139 is disposed in the cavity, although the bearing 139 may have multiple sets and is disposed along the axial direction of the guide tube 111, the inner ring of the bearing 139 is connected with the bottom fixing sleeve 116, the outer ring of the bearing 139 is connected with the rotary bearing sleeve 117, and the above-mentioned transmission fan 131 is fixed on the rotary bearing sleeve 117, that is, the rotary connection with the guide tube 111 is realized through the rotary bearing sleeve 117. Specifically, a boss is provided in the middle of the bottom fixing sleeve 116, through which the guide tube 111 passes, and an annular groove is provided at the outer periphery of the boss, and the rotary bearing sleeve 117 has a partial structure protruding into the annular groove to form a sealed connection relationship therebetween, and when the bearings 139 are disposed in the chamber, the bearings 139 are located on the boss, and when there are a plurality of bearings 139, a spacing structure is provided in the chamber for spacing-mounting the corresponding bearings 139.

Referring again to fig. 6 and 7, in the preferred embodiment, the nozzle 11 further includes two oppositely disposed wind-blocking heads 118, the wind-blocking heads 118 including a first mating portion 119 and a second mating portion 120, wherein the first mating portion 119 mates with the cylindrical surface of the barrel 12 and the second mating portion 120 mates with the cylindrical surface of the conduit 111. Specifically, the first mating portion 119 and the second mating portion 120 are integrally formed, the first mating portion 119 has a first mating surface that fits against the cylindrical surface of the barrel 12, the first mating surface is cylindrical and the axial direction of the cylindrical surface is the same as the axial direction of the barrel 12, and at least a portion of the structure of the barrel 12 is located between the first mating portions 119 of the two air plugs 118; the second matching part 120 has a second matching surface which is attached to the cylindrical surface of the conduit 111, the second matching surface is also a cylindrical surface, the axial direction of the cylindrical surface is the same as the axial direction of the conduit 111, the second matching surfaces of the two wind plugs 118 surround to form a complete cylindrical surface and completely wrap part of the area of the conduit 111, and in addition, the bottom fixing sleeve 116 is supported on the end surfaces of the two second matching parts 120, so that the connection and fixation relationship between the bottom fixing sleeve 116 and the conduit 111 can be realized. By this arrangement, sealing of the chamber structure is achieved, thereby preventing dust in the flue gas from entering the chamber to affect the rotatable connection between the rotary bearing housing 117 and the duct 111.

Referring to fig. 1, 2, 6 and 8, the spray gun 1 according to an embodiment of the present invention further includes a V-shaped rib 14, the V-shaped rib 14 is located on the windward side of the gun barrel 12, the gun barrel 12 is located in the V-shaped groove of the V-shaped rib 14, and the opening of the V-shaped groove is larger than the outer diameter of the gun barrel 12, so that the V-shaped rib 14 covers the gun barrel 12 on the windward side of the gun barrel 12, the end of the V-shaped rib can be connected and fixed with the connecting flange 15, the inner wall of the V-shaped groove is connected and fixed with the cylindrical surface of the gun barrel 12, the connecting flange 15 is the mounting portion 138 of the spray gun 1, when the spray gun 1 is applied to the high temperature flue 3, the end of the gun barrel 12 having the nozzle 11 extends into the high temperature flue 3, the other end of the V-shaped rib is located outside the high temperature flue 3 for supplying fluid into the gun barrel 12, the inner side and the outer side is separated by the connecting flange 15, and the whole spray gun 1 is fixed on the high-temperature flue 3 through a connecting flange 15. In this embodiment, form the guard action to spray gun pipe 12 through V type gusset 14, high temperature flue gas can not direct impact spray gun pipe 12, and V type gusset 14 can play the water conservancy diversion effect to high temperature flue gas through V type structure, has further guaranteed the structural strength of spray gun 1 in the partial high temperature flue 3. The end of the first matching part 119 of the wind blocking head 118, which is far away from the second matching part 120, can extend to be in contact connection with the V-shaped rib plate 14.

Referring to fig. 8 and fig. 9, the embodiment of the utility model provides a desulfurization waste water zero discharge system is still provided, including high temperature flue 3, desulfurizing tower 2 and enrichment facility, high temperature flue 3 is connected with desulfurizing tower 2, carry out wet flue gas desulfurization in the high temperature flue 3 gets into desulfurizing tower 2, and then can generate desulfurization waste water, high temperature flue 3 is derived the high temperature flue gas that produces in boiler 31 or the kiln usually, carry out denitration treatment through denitrification facility 34 in proper order, get into desulfurizing tower 2 after handling such as air preheater 33 and dust remover 35 and handle, arrange to external atmosphere by chimney 32 at last. Wherein the liquid outlet and the enrichment facility intercommunication of desulfurizing tower 2, the leading-in enrichment facility of desulfurization waste water that desulfurizing tower 2 produced is concentrated, and enrichment facility exhaust desulfurization waste water then can spout into high temperature flue 3 in through foretell spray gun 1, carries out the evaporative crystallization through the high temperature flue gas in the high temperature flue 3, and the enrichment facility combustion gas gets into in desulfurizing tower 2 again. The utility model discloses in, adopt foretell spray gun 1 to spout into high temperature flue 3 with the concentrated desulfurization waste water of concentration tower 4 in, and before spouting into high temperature flue 3 with the desulfurization waste water after the concentration, desulfurization waste water flows into three header 5 earlier in, deposit in the clarification tank 51 of three header 5 and purify, the precipitate in the clarification tank 51 carries out special treatment again after handling through pressure filter 6, for example adopt the truck to transport it, and the supernatant in the clarification tank 51 then can spout and carry out evaporative crystallization in the high temperature flue 3. Therefore, zero emission of the desulfurization wastewater can be realized in the whole process.

Specifically, the concentration device includes a concentration tower 4, which is mainly used for concentrating the desulfurization wastewater generated in the desulfurization tower 2, and has a desulfurization wastewater inlet 41 and a concentrated solution outlet 42, the desulfurization wastewater generated in the desulfurization tower 2 can enter the concentration tower 4 through the desulfurization wastewater inlet 41, and the concentrated desulfurization wastewater is discharged out of the concentration 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, and the concentration zone 43 is the inner space of the concentration tower 4, specifically, a section of space extending upwards from the bottom of the concentration tower 4, the above-mentioned concentrate outlet 42 is located at the bottom of the concentration zone 43, the bottom of the concentration tower 4 has a tapered structure 14 extending downwards, and the concentrate outlet 42 is at the bottom corner of the tapered structure 14, so that the desulfurization wastewater in the concentration tower 4 can be conveniently emptied, and the desulfurization wastewater inlet 41 is located 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; in addition, the concentration tower 4 is further provided with a high temperature gas inlet 45 and a low temperature gas outlet 46, wherein the high temperature gas 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 the draught fan of the dust remover 35 can be adopted, desulfurization wastewater in the concentration tower 4 is subjected to heat exchange concentration through the high temperature flue gas, the high temperature gas inlet 45 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 gas outlet 46 is used for discharging gas generated in the concentration tower 4 in the concentration process, the gas is generally high temperature flue gas (with reduced temperature after heat exchange) and water vapor introduced into the concentration tower 4, the gas is also higher than the concentration zone 43 and is generally positioned at the top of the concentration tower 4, the top of the concentration tower 4 can also be provided with an upward extending tapered structure 47, the low temperature gas outlet 46 is arranged at the top angle position of the tapered structure 47, of course, the gas discharged from the low temperature gas outlet 46 is only lower in temperature relative to the high temperature gas inlet 45 It does not mean that the temperature of the gas discharged therefrom is relatively low; a bubble generator 48 is further disposed in the condensation zone 43 of the condensation tower 4, and the bubble generator 48 is disposed at a height close to the high temperature gas inlet 45 and is communicated with the high temperature gas inlet 45, i.e. the high temperature flue gas introduced into the condensation tower 4 from the high temperature gas inlet 45 enters the bubble generator 48 to generate a large amount of bubbles in the condensation zone 43. The utility model discloses in, concentrated district 43 is distinguished from desulfurization waste water and deposits the district in traditional concentrated tower 4, and in traditional concentrated tower 4, desulfurization waste water deposits the district and mainly is the desulfurization waste water that is used for depositing after concentrating, but the utility model discloses well desulfurization waste water is not in getting into desulfurizing tower 2 with the mode that sprays, but directly flows in concentrated district 43, for example when beginning to concentrate, desulfurization waste water in desulfurizing tower 2 is earlier by desulfurization waste water import 41 flow in concentrated district 43, and behind desulfurization waste water reached certain liquid level in concentrated district 43, just can be through high temperature air inlet 45 leading-in high temperature flue gas with concentrated desulfurization waste water in to concentrated tower 4. Specifically, after replenishing desulfurization waste water in concentrated district 43, bubble generator 48 submergence is in the bottom position of desulfurization waste water, after letting in high temperature flue gas, bubble generator 48 can produce a large amount of bubbles, high temperature flue gas is with the form of bubble come-up gradually in desulfurization waste water, and can directly with desulfurization waste water heat transfer at the in-process that goes up floating, desulfurization waste water temperature rises, and then can be so that the moisture in the desulfurization waste water evaporates in a large number, by low temperature gas outlet 46 discharge concentration tower 4, thereby reach the purpose of concentrated desulfurization waste water. By adopting the mode, the high-temperature flue gas can be fully contacted with the desulfurization wastewater, no conducting 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. Generally speaking, conventional technology should avoid producing the bubble in concentrated in-process when carrying out the heat transfer concentration to desulfurization waste water, especially when spraying the concentration, still need set up usually and remove the bubble structure and eliminate the bubble to avoid the bubble to carry desulfurization waste water, but the utility model discloses in, adopt the bubble heat transfer in the concentrated tower 4, and the combustion gas weight is got back to in the desulfurizing tower 2 again.

Optimizing the above embodiment, still being provided with bubble buffer plate 49 in concentrated district 43, this bubble buffer plate 49 horizontal partition concentrated district 43, and the equipartition has a plurality of bleeder vents on bubble buffer plate 49, and the bubble need pass corresponding bleeder vent along desulfurization waste water come-up in-process, shows that the size of bleeder vent is greater than the pore size on bubble generator 48. In the present embodiment, the bubble buffer plate 49 is horizontally disposed, and the bubble buffer plate 49 divides the condensation section 43 into upper and lower two spaces, although when the bubble buffer plate 49 is plural, the respective bubble buffering plates 49 are sequentially provided at intervals in the longitudinal direction of the condensation section 43, thereby dividing the condensation section 43 into n +1 when the number of the bubble buffering plates 49 is n, in a preferred embodiment, there are three bubble buffer plates 49, the three bubble buffer plates 49 divide the concentration zone 43 into four spaces, the air holes are uniformly distributed along the cross section of each bubble buffer plate 49, a large amount of bubbles generated by the bubble generator 48 float up along the desulfurization wastewater, and need to pass through the air holes on each bubble buffer plate 49 in sequence, and when there are more bubbles, each bubble needs to pass through the corresponding air hole in sequence, and further the floating time of the bubbles can be delayed, so that the heat exchange between the high-temperature flue gas and the desulfurization wastewater can be fully realized.

Continuing to optimize the above embodiment, there are also provided 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, actually, it is uniformly arranged along the circumference of the concentration tower 4, and the bubble generator 48 is also arranged along the cross section of the concentration tower 4, the arrangement mode is close to the bubble buffer plate 49, each high temperature air inlet 45 is communicated with the bubble generator 48, that is, it indicates that the bubble generator 48 is fed air from a plurality of directions, in addition, a plurality of bubble holes are uniformly distributed on the bubble buffer plate 49, specifically, they are uniformly distributed along the cross section of the concentration zone 43, and further, the bubble generator 48 can generate bubbles on the whole cross section of the concentration zone 43, so as to avoid the bubble generating positions being too concentrated and unable to perform uniform heat exchange on the desulfurization wastewater in the concentration zone 43. The utility model discloses in, bubble generator 48 sets up in the position that concentrated district 43 is close to the bottom, specifically is the top position of the convergent structure of concentrated district 43, for example when the convergent structure of concentrated district 43 is the back taper body, then bubble generator 48 is located the top surface position of this back taper body, and desulfurization waste water can pass this bubble generator 48 and get into convergent structure 14 and correspond the region certainly. Generally, the desulfurization waste water will form a certain amount of sedimentation in the concentration zone 43, when the concentrated solution outlet 42 is not opened, the sediment of the desulfurization waste water will be concentrated in the area corresponding to the tapered structure of the concentration zone 43, and in addition, because the bubble generator 48 is connected with the high temperature gas inlet 45, the temperature around the bubble generator 48 is highest in the concentration tower 4, i.e. the concentration efficiency of the desulfurization waste water in the area is highest, and thus the concentration of the 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 the desulfurization waste water at the bottom is higher than that at the upper part thereof, specifically, along the height direction of the liquid level of the desulfurization waste water, the concentration of the desulfurization waste water becomes lower and lower, and then the concentrated solution outlet 42 can be opened for a period of time to discharge the desulfurization waste water with high concentration at the bottom, and then the concentrated solution outlet 42 is closed, and then the low-concentration desulfurization waste water flows to the bubble generator 48, meanwhile, new desulfurization wastewater is continuously added into the concentration zone 43, and the desulfurization wastewater in the concentration zone 43 is gradually concentrated to the required concentration by the periodic circulation, and is finally discharged from the concentrated solution outlet 42.

For the above-mentioned concentration method, the concentration area 43 may be set with three liquid levels, which are a full liquid level, a middle liquid level and a low liquid level from top to bottom in sequence. Wherein the full liquid level is the highest liquid level of the desulfurization wastewater stored in the concentration zone 43, and the desulfurization wastewater liquid level in the concentration zone 43 and the liquid level after adding a new liquid (new desulfurization wastewater) are full liquid levels when aeration concentration is started; the middle liquid level is the liquid level when the desulfurization wastewater in the concentration zone 43 is concentrated and the lower part of the high-concentration desulfurization wastewater needs to be discharged, namely, after the desulfurization wastewater in the concentration zone 43 is reduced to the middle liquid level from the full liquid level, the concentrated liquid outlet 42 is opened and the high-concentration desulfurization wastewater at the bottom is discharged; the low liquid level is the liquid level after the high concentration desulfurization waste water in the concentration zone 43 is discharged, that is, when the desulfurization waste water in the concentration zone 43 is reduced to the low liquid level from the medium liquid level, the concentrated liquid outlet 42 is closed, the desulfurization waste water inlet 41 is opened at the same time, new liquid is supplemented to the full liquid level in the concentration zone 43, and at this time, the concentration period in the concentration tower 4 is completed. Of course, the full level, the middle level and the low level are all detected by the level sensor 410 to control the corresponding actions, which can be set according to actual needs. The utility model discloses in, concentration tower 4 adopts intermittent type formula feed liquor, flowing back to through level sensor control feed liquor volume, leakage fluid, wherein concentrated multiplying power (leakage fluid/(evaporation capacity + leakage fluid), wherein the evaporation capacity is the difference between full liquid level and the well liquid level, and the leakage fluid is then the difference between well liquid level and the low liquid level, and whole process is not only concentrated multiplying power controllable from this, and is very convenient moreover.

Referring to fig. 9, in the preferred embodiment, the high temperature inlet 45 of the concentrating tower 4 is in communication 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, that is, the high-temperature flue 3 between the dust remover 35 and the desulfurizing tower 2, and the high-temperature flue gas 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 provided in the high-temperature flue 3 between the dust remover 35 and the desulfurizing tower 2, wet desulfurization is performed in the leading-in desulfurizing tower 2 of high-temperature flue gas through the fan 36, meanwhile, a branch pipe 37 is further connected to the section of high-temperature flue 3, the branch pipe 37 extends to the high-temperature gas inlet 45, and another fan 371 is provided in the branch pipe 37, so that a part of high-temperature flue gas discharged from the dust remover 35 can directly enter the desulfurizing tower 2, a part of high-temperature flue gas can enter the concentrating tower 4 through the branch pipe 37 to exchange heat with desulfurization wastewater, of course, the fan 371 in the branch pipe 37 should adopt a booster fan, so that the flue gas pressure at the high-temperature gas inlet 45 should be higher than the gas pressure at the low-temperature gas outlet 46. Generally, the dust collector 35 is an electrostatic dust collector 35 and a bag-type dust collector 35, the content of particulate matters in the high-temperature flue gas purified by the dust collector 35 is very low, the temperature can reach about 110 ℃, and the temperature of the desulfurization wastewater discharged into the concentration tower 4 by the desulfurization tower 2 is generally 45 ℃, that is, in the concentration tower 4, the high-temperature flue gas at about 110 ℃ and the desulfurization wastewater 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 wastewater is large, the heat exchange efficiency is high, and the heat utilization rate of the flue gas is improved. In addition, a thermometer 411 is arranged in the concentration tower 4 and is used for detecting the temperature of each section in the concentration tower 4, for example, the temperature of the gas discharged from the concentration tower 4 is detected at the position, close to the low-temperature gas outlet 46, of the top of the concentration tower 4, when the concentration zone 43 is detected at the position, close to the bubble generator 48, for concentration heat exchange, the temperature of the desulfurization wastewater near the bubble generator 48, and if necessary, the temperature of the high-temperature gas at the high-temperature gas inlet 45 should also be detected, and by detecting the temperature of these positions, the temperature can be used for judging the heat exchange condition between the bubbles in the concentration tower 4 and the desulfurization wastewater, and further can be used for adjusting the flow of the high-temperature gas in the branch pipe 37, and ensuring the concentration efficiency. The embodiment is continuously optimized, two groups of concentration devices are arranged, the two groups of concentration devices are connected in parallel, the connection 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 concentration devices is the same, and the two groups of concentration devices are connected with corresponding pipelines in the zero-emission system; in another kind of mode, when the desulfurization waste water emission is more specifically in desulfurizing tower 2, two sets of enrichment facility simultaneous working to the desulfurization waste water that produces in the rapid concentration desulfurizing tower 2 guarantees concentration efficiency.

Further, the zero discharge system further comprises an agglomeration complexing agent preparation device 7, the desulfurization wastewater discharged from the concentrated solution outlet 42 is treated by the triple box 5 and then is led into the agglomeration complexing agent preparation device 7, namely, supernatant of a clarification tank 51 in the triple box 5 is led into the agglomeration complexing agent preparation device 7, the desulfurization wastewater and the agglomeration complexing agent are mixed according to the mass percentage to prepare an agglomeration complexing solution, then the agglomeration complexing solution is sprayed into a high-temperature flue 3 by a spray gun 1, wherein the high-temperature flue 3 is a high-temperature flue 3 before a dust remover 35, namely a boiler 31 or a high-temperature flue 3 between a kiln and the dust remover 35, specifically, the spray guns 1 are arranged at the front high-temperature flue 3 and the rear high-temperature flue 3 of the denitration device 34, the temperature of the high-temperature flue gas in the high-temperature flue 3 before the denitration device 345 can reach 400-500 ℃, the temperature of the high-temperature flue gas in the high-temperature flue 3 after the denitration device 8 can reach 330-360 ℃, when the agglomerated composite solution is sprayed into the high-temperature flue 3 in the temperature range, the agglomerated composite solution can be quickly evaporated, and water is evaporated into steam which enters the dust remover 35 or the desulfurizing tower 2 along with flue gas or is discharged into the atmosphere. Most of various salts in the agglomerated composite liquid enter the dust remover 35 along with the fly ash to be collected, and a very small part of various salts enter the desulfurizing tower 2 (negligible). Wherein the agglomerated composite solution can inhibit the activity of Cl ions in the desulfurization wastewater, 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 capture SO in the high-temperature flue gas₃Or other particulate matter to purify the high temperature flue gas. Based on the situation, the air preheater 33 in the flue behind the denitration device 34 can adopt the low-cost material Q355, so that the corrosion prevention cost is lower.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A self-cleaning spray nozzle comprising a conduit communicable with a barrel and a spray head mounted on the conduit, characterized in that: the pipe with the shower nozzle is coaxial to be set up, in still be provided with clean subassembly on the pipe, clean subassembly include the transmission fan and install in cleaning head on the transmission fan, the transmission fan is rotatable install in on the pipe, just cleaning head includes the scraper, the knife face of scraper is close to the surface of shower nozzle.

2. A self-cleaning nozzle as defined in claim 1, wherein: the cleaning head further comprises a rotating support, the rotating support is fixedly mounted on the transmission fan, a plurality of scrapers are arranged on the rotating support, and the scrapers are sequentially distributed at intervals along the circumferential direction of the spray head.

3. A self-cleaning nozzle as defined in claim 1, wherein: the area that the shower nozzle is close to the spout is the spout district, the knife face of scraper have with the first inclined plane of the surface complex that the spout district corresponds, first inclined plane to being close to the spout slope of shower nozzle.

4. A self-cleaning nozzle as defined in claim 3, wherein: the nozzle also 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 knife face of the scraper is also provided with a second inclined face matched with the outer surface corresponding to the reducing area, the second inclined face inclines towards the nozzle close to the spray head, and the inclination angle of the second inclined face is smaller than that of the first inclined face.

5. A self-cleaning nozzle as defined in claim 1, wherein: the transmission fan includes the installation department and set up in a plurality of windward blades on the installation department, each windward blade follows the circumference of installation department interval distribution in proper order, the installation department pass through the bearing with pipe rotatable coupling.

6. The self-cleaning nozzle of claim 5, wherein: and a dust guard is fixed on the mounting part and is positioned on the windward side of the bearing.

7. The self-cleaning nozzle of claim 5, wherein: still be fixed in including the installation the fixed cover of bottom on the pipe and cover are located on the pipe and with the fixed cover of bottom encloses the swivel bearing cover that closes formation cavity, in be provided with at least a set of in the cavity the bearing, the swivel bearing cover passes through the bearing with pipe rotatable coupling, just the transmission fan installation is fixed in on the swivel bearing cover.

8. The self-cleaning nozzle of claim 7, wherein: still including two wind end caps of relative setting, wind end cap including can with the first cooperation portion of the cylinder complex of spray gun pipe and with the cylinder complex second cooperation portion of pipe, the partial structure of pipe is located two between the second cooperation portion, the fixed cover support in bottom is fixed in two on the second cooperation portion.

9. A spray gun, comprising a spray gun tube, characterized in that: further comprising a nozzle according to any one of claims 1 to 8, said conduit being disposed vertically on said barrel.

10. The utility model provides a desulfurization waste water zero discharge system, includes high temperature flue and desulfurizing tower, the high temperature flue with the desulfurizing tower is connected, its characterized in that: the desulfurization waste water concentration device is used for concentrating the desulfurization waste water generated by the desulfurization tower in the desulfurization waste water concentration device, introducing the desulfurization waste water concentrated by the desulfurization waste water concentration device into the agglomeration complexing agent preparation device to prepare an agglomeration complexing solution, and spraying the agglomeration complexing solution into the high-temperature flue through the spray gun of claim 9.

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