Feeding device for feeding high-corrosivity waste liquid into kiln for incineration

Abstract

The utility model discloses a high-corrosivity waste liquid feeding incineration feeding device, relates to the technical field of waste treatment, and solves the problem that in the prior art, when high-corrosivity waste liquid is fed, a rotary kiln is prone to corrosion due to the fact that the high-corrosivity waste liquid is directly sprayed inside. The device comprises a shell, a U-shaped air duct is arranged in the shell, a liquid spraying assembly is arranged at one end of the U-shaped air duct, an air door assembly used for being connected with a feeding port of the rotary kiln is arranged at the other end of the U-shaped air duct, a recycling structure is arranged below the shell and communicated with a waste liquid cylinder, the waste liquid cylinder is connected with a liquid spraying port, and the lower portion of the U-shaped air duct is connected with a high-pressure air supply device. According to the feeding device, the feeding port of the rotary kiln is connected with the shell provided with the U-shaped air channel, high-corrosion liquid is sprayed into the U-shaped air channel through the liquid spraying assembly firstly, then the high-corrosion liquid is blown into the rotary kiln at a relatively slow speed through the high-pressure air supply device, and the problem that in an existing feeding mode, waste liquid is directly sprayed into the rotary kiln to cause corrosion is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste treatment, in particular to a kiln incineration feeding device for highly corrosive waste liquid. Background Art

[0002] Hazardous waste incineration is an efficient and comprehensive disposal method, but there are many types of hazardous wastes, and the chemical composition is relatively complex, containing a variety of inorganic and organic and other materials, and they are flammable and explosive. In combination with environmental protection policies and technical specifications, hazardous waste incineration facilities should be equipped with a reasonable feeding system.

[0003] The rotary kiln incinerator is the mainstream furnace type currently used for incineration of industrial hazardous wastes, which is generally downstream, that is, the flue gas and the material flow in the same direction. The current rotary kiln for liquid incineration is multi-port feed, such as the Chinese utility model patent with announcement number CN215765132U discloses an incineration device for efficiently treating high-concentration salt-containing organic waste liquid, including an incineration tank, a pretreatment tank arranged on one side of the incineration tank, and an exhaust gas treatment tank on the other side; the incineration tank is divided into a first incineration chamber at the bottom and a second incineration chamber at the top by a first partition and a second partition; the first partition and the second partition are connected by a connecting pipe to form a transition chamber; an atomizing nozzle is arranged at the upper part of the first incineration chamber, and the atomizing nozzle is connected to the pretreatment tank through a liquid inlet pipe; a first burner is arranged downwardly from the atomizing nozzle in the first incineration chamber, and a first combustion-supporting air inlet pipe is arranged below the first burner; an air outlet pipe is also arranged at the top of the second incineration chamber, and the air outlet pipe is connected to the exhaust gas treatment tank.

[0004] The nozzle used as the waste liquid feeding device in the above-mentioned prior art adopts a multi-port injection and multi-furnace chamber incineration method to feed the rotary kiln, which causes the temperature of the incineration system to fluctuate violently, and the waste liquid cannot be directly and completely burned. Therefore, in the incineration treatment of highly corrosive waste liquid, due to the limited internal space of the rotary kiln, the refractory material of the rotary kiln directly facing the injection port will adhere to the waste liquid and cause corrosion, and most conventional refractory materials are not corrosion-resistant, and conventional corrosion-resistant materials are not resistant to high temperatures. Therefore, how to design a waste liquid feeding device suitable for highly corrosive liquids that can avoid direct injection into the rotary kiln to cause corrosion inside the rotary kiln is an urgent problem to be solved. Utility Model Content

[0005] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a highly corrosive waste liquid feeding device for kiln incineration, which solves the problem in the prior art that directly spraying highly corrosive waste liquid inside when feeding easily causes corrosion of the rotary kiln.

[0006] The technical solution of the utility model is achieved as follows: a highly corrosive waste liquid incineration feeding device comprises a shell, a U-shaped air duct is arranged in the shell, a liquid spraying assembly is arranged at one end of the U-shaped air duct, and a damper assembly for connecting to the feeding port of the rotary kiln is arranged at the other end, a recovery structure is arranged under the shell, the recovery structure is connected to the waste liquid cylinder, the waste liquid cylinder is connected to the liquid spraying assembly, and a high-pressure air supply device is connected to the lower part of the U-shaped air duct.

[0007] Preferably, the U-shaped air duct includes a liquid spray section, a recovery section, an air outlet section and an air outlet which are connected in sequence; the side walls of the liquid spray section, the recovery section and the air outlet section are all provided with a corrosion-resistant layer; the damper assembly is arranged at the air outlet; the liquid spray section is arranged vertically and above the recovery section; the air outlet section is arranged obliquely; and the side wall of the recovery section is provided with an air inlet for connecting to a high-pressure air supply device.

[0008] Furthermore, the diameter of the air outlet is smaller than the minimum aperture of the recovery section and the air outlet section.

[0009] Preferably, the recovery structure includes a guide groove arranged at the bottom of the recovery section, and the bottom of the guide groove is connected to the waste liquid tank arranged outside the shell through a reflux pipe; a fluid pump is provided on the reflux pipe.

[0010] Preferably, the waste liquid cylinder is provided with a first liquid inlet pipe, a second liquid inlet pipe and a liquid outlet pipe, the first liquid inlet pipe is connected to the reflux pipe and a one-way valve is provided between the two, the upper end of the second liquid inlet pipe is provided with an upper cover, and the pipe mouth of the liquid outlet pipe is located at the bottom of the waste liquid cylinder; the waste liquid cylinder is provided with an air inlet, and the air inlet is connected to the air supply unit.

[0011] Preferably, the air supply unit is an air pump or a high-pressure air tank; a one-way valve is provided on the air inlet, and the air inlet is arranged at the upper part of the waste liquid cylinder.

[0012] Preferably, the liquid spraying assembly comprises a plurality of atomizing nozzles fixedly arranged on the top of the liquid spraying section, and the atomizing nozzles are all connected to the liquid outlet pipe through a liquid supply pipeline.

[0013] Preferably, the high-pressure air supply device includes an air inlet pipe connected to the air inlet, the air inlet pipe is connected to the high-pressure fan, and a first air guide plate is provided at the air inlet.

[0014] Preferably, the damper assembly comprises a plurality of baffles hinged on the air outlet in parallel and at equal intervals, and the baffles are all connected to an opening and closing driver arranged on the housing through a transmission mechanism.

[0015] Preferably, the transmission mechanism includes a rack vertically slidably arranged on the shell, the partition is fixedly connected with a hinge shaft and rotatably cooperates with the side wall of the air outlet through the hinge shaft, a gear is provided on the hinge shaft and several hinge shafts are meshed with the rack through the gear, the opening and closing driver is a driving motor fixedly arranged on the shell, a gear is provided on the output shaft of the driving motor and is meshed with the rack through the gear.

[0016] Beneficial effects of the utility model: The feeding device is connected to a housing with a U-shaped air duct at the feed port of the rotary kiln, and the highly corrosive liquid is first sprayed into the U-shaped air duct by the liquid spraying component, and then blown into the rotary kiln at a relatively gentle speed through the high-pressure air supply device, thereby avoiding the problem of directly spraying the waste liquid into the interior of the rotary kiln and causing corrosion in the existing feeding method. A recovery structure is further provided to collect the waste liquid that cannot be blown out and return it to the waste liquid tank for re-feeding, and a damper component is provided to control the air volume and opening and closing of the air entering the rotary kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the feeding device of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the damper assembly of the utility model;

[0020] In the figure: 1: shell, 3: U-shaped air duct, 4: spray assembly, 5: recovery structure, 6: waste liquid cylinder, 7: high-pressure air supply device, 31: spray section, 32: recovery section, 33: air outlet section, 34: air outlet, 35: air inlet, 51: guide groove, 52: reflux pipe, 53: fluid pump, 61: first liquid inlet pipe, 62: second liquid inlet pipe, 63: liquid outlet pipe, 64: upper cover, 65: air inlet, 67: air pump, 71: high-pressure fan, 72: first air guide plate, 81: partition, 82: opening and closing drive, 83: rack, 84: hinge shaft. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1As shown, Example 1, a highly corrosive waste liquid incineration feeding device includes a shell 1, a U-shaped air duct 3 is provided in the shell 1, a liquid spraying assembly 4 is provided at one end of the U-shaped air duct 3, and a damper assembly for connecting to the feed port of the rotary kiln is provided at the other end. The damper assembly can avoid high-heat reflux fire of the rotary kiln to a certain extent. A recovery structure 5 is provided below the shell 1, and the recovery structure 5 is connected to the waste liquid cylinder 6. By providing the recovery structure 5, the waste liquid that is sprayed and attached to the inner wall of the U-shaped air duct or cannot be blown out can be collected and refluxed to the waste liquid cylinder 6, so as to be fed through the liquid spraying assembly later. The waste liquid cylinder 6 is connected to the liquid spraying port, and the lower part of the U-shaped air duct 3 is connected to a high-pressure air supply device 7. When in use, a shell provided with a U-shaped air duct is connected to the feed port of the rotary kiln, and the highly corrosive liquid in the waste liquid tank is first atomized and sprayed into the U-shaped air duct by the liquid spraying component 4, and then blown into the feed port of the rotary kiln through the U-shaped air duct at a relatively gentle speed through the high-pressure air supply device, thereby avoiding the problem of directly spraying the waste liquid into the interior of the rotary kiln and causing corrosion in the existing feeding method.

[0023] Specifically in this embodiment, the U-shaped air duct 3 includes a liquid spraying section 31, a recovery section 32, an air outlet section 33 and an air outlet 34 connected in sequence. The side walls of the liquid spraying section 31, the recovery section 32 and the air outlet section 33 are all provided with a corrosion-resistant layer. The material of the corrosion-resistant layer can be selected from polytetrafluoroethylene material, which is both resistant to a certain degree of high temperature and corrosion-resistant, avoiding corrosion to the U-shaped air duct. In this embodiment, the shell is arranged outside the rotary kiln, which can avoid damage to the corrosion-resistant layer caused by the high temperature of the rotary kiln. In addition, the damper assembly is arranged at the air outlet 34, and the liquid spraying section 31 is arranged vertically and located above the recovery section 32, which can provide a spraying space for the waste liquid sprayed by the liquid spraying assembly after atomization, and reduce the air duct aperture of the recovery section and the air outlet section. The air outlet section 33 is arranged obliquely to reduce the resistance during blowing, and at the same time facilitate the liquid attached to the side wall of the air outlet section to flow back to the recovery structure during blowing. The side wall of the recovery section 32 is provided with an air inlet 35 for connecting to the high-pressure air supply device 7. The diameter of the air outlet 34 is smaller than the minimum diameter of the recovery section 32 and the air outlet section 33, thereby increasing the air pressure blown out through the U-shaped hole.

[0024] Embodiment 2, a highly corrosive waste liquid feeding device for incineration in a kiln, based on embodiment 1, the recovery structure 5 includes a guide groove 51 arranged at the bottom of the recovery section 32, and the bottom of the guide groove 51 is connected to the waste liquid tank 6 arranged outside the shell 1 through a reflux pipe 52. In this embodiment, the waste liquid tank is fixed on the ground or fixedly connected to the outside of the shell, and the guide groove is an inverted cone structure as a whole, covering the entire lower part of the recovery section, so that the downstream waste liquid is recovered to the bottom, and refluxed to the waste liquid tank through the reflux pipe connected to the opening at the bottom.

[0025] As a further embodiment, a fluid pump 53 is provided on the reflux pipe 52 to provide power for the reflux of the waste liquid, and the reflux of the waste liquid can also be satisfied when the pressure of the waste liquid pipe is high.

[0026] Embodiment 3, a highly corrosive waste liquid feeding device for kiln incineration, based on embodiment 2, a first liquid inlet pipe 61, a second liquid inlet pipe 62 and a liquid outlet pipe 63 are provided on the waste liquid tank 6, the first liquid inlet pipe 61 is connected to the reflux pipe 52 and a one-way valve is provided between the two, in this embodiment, the one-way flow restriction of the one-way valve enables the waste liquid to enter the first liquid inlet pipe only through the reflux pipe. An upper cover 64 is provided at the upper end of the second liquid inlet pipe 62, and the upper cover can be opened and closed relative to the second liquid inlet pipe, so as to meet the feeding demand into the waste liquid tank.

[0027] In addition, in this embodiment, the outlet of the liquid outlet pipe 63 is located at the bottom of the waste liquid cylinder 6, and the waste liquid cylinder 6 is provided with an air inlet 65, and the air inlet 65 is connected to the air supply unit. In this embodiment, the air supply unit is an air pump 67 or a high-pressure air tank. In actual use, the air supply unit is used to supply air to the waste liquid cylinder to increase the air pressure in the waste liquid cylinder.

[0028] A one-way valve is provided on the air inlet 65, and the air inlet is provided on the upper part of the waste liquid cylinder 6. The liquid spraying assembly 4 includes a plurality of atomizing nozzles fixedly provided on the top of the liquid spraying section 31, and the atomizing nozzles are connected to the liquid outlet pipe 63 through the liquid supply pipe. When it is necessary to feed the rotary kiln, the high pressure in the waste liquid tank is used to cause the liquid in the waste liquid tank to automatically discharge into the liquid supply pipe through the liquid outlet pipe 63, and finally spray into the U-shaped air duct through the atomizing nozzle. In actual use, a solenoid valve is provided on the liquid supply pipe to control the opening and closing of the liquid spraying process.

[0029] Embodiment 4, a highly corrosive waste liquid incineration feeding device, based on embodiment 3, the high-pressure air supply device 7 includes an air inlet pipe connected to the air inlet 35, and the air inlet pipe is connected to the high-pressure fan 71. In this embodiment, a gate 73 capable of closing the air inlet is vertically slidably provided on the side wall of the shell, so that the air inlet can be closed when not in use to avoid pollution. In addition, a first air guide plate 72 is provided at the air inlet 35, and the first air guide plate is tilted downward to guide the direction of the wind flow to reduce the formation of chaotic wind flow between the recovery section and the liquid spraying section 31.

[0030] Example 5, a highly corrosive waste liquid incineration feeding device, based on Example 4, as Figure 2 As shown, the damper assembly includes a plurality of baffles 81 that are hinged to the air outlet 34 in parallel and at equal intervals, and the baffles 81 are all connected to the opening and closing driver 82 provided on the housing 1 through a transmission mechanism. Specifically, the transmission mechanism includes a rack 83 that is vertically slidably provided on the housing, the baffle 81 is fixedly connected to a hinge shaft 84 and is rotationally matched with the side wall of the air outlet 34 through the hinge shaft 84, the hinge shaft 84 is provided with a gear and the plurality of hinge shafts are meshed with the rack 83 through the gear, and the opening and closing driver 82 is a driving motor that is fixedly provided on the housing 1, and a gear is provided on the output shaft of the driving motor and is meshed with the rack 83 through the gear.

[0031] When the embodiment is in use, when loading is required, the driving motor works, drives the rack to slide, and then synchronously drives the plurality of hinge shafts to rotate, and synchronously drives the partitions on the hinge shafts to rotate, so as to realize the opening of the air outlet, and at the same time, the opening degree of the air outlet can be controlled by controlling the angle of the partition. After loading is completed, the driving motor rotates in the opposite direction, drives the partition to rotate in the opposite direction, and then covers the air outlet to realize the opening and closing control.

[0032] As a further optional embodiment, in the open state, the outer end of the partition is slightly higher than the inner end to prevent backflow caused by high heat in the rotary kiln.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly corrosive waste liquid incineration feeding device, comprising a housing (1), characterized in that: A U-shaped air duct (3) is provided in the shell (1), a liquid spraying assembly (4) is provided at one end of the U-shaped air duct (3), and a damper assembly for connecting to a feed port of a rotary kiln is provided at the other end. A recovery structure (5) is provided below the shell (1), the recovery structure (5) is communicated with a waste liquid cylinder (6), the waste liquid cylinder (6) is connected to the liquid spraying assembly (4), and a high-pressure air supply device (7) is connected to the lower part of the U-shaped air duct (3); the U-shaped air duct (3) comprises a liquid spraying section (31), a recovery section (32), an air outlet section (33) and an air outlet (34) which are connected in sequence, the side walls of the liquid spraying section (31), the recovery section (32) and the air outlet section (33) are all provided with a corrosion-resistant layer, the damper assembly is provided at the air outlet (34), the liquid spraying section (31) is vertically arranged and located above the recovery section (32), the air outlet section (33) is inclinedly arranged, and the side wall of the recovery section (32) is provided with an air inlet (35) for connecting to the high-pressure air supply device (7).

2. The highly corrosive waste liquid incineration feeding device according to claim 1 is characterized in that: The diameter of the air outlet (34) is smaller than the minimum diameter of the recovery section (32) and the air outlet section (33).

3. The highly corrosive waste liquid incineration feeding device according to claim 1 or 2, characterized in that: The recovery structure (5) comprises a guide groove (51) arranged at the bottom of the recovery section (32); the bottom of the guide groove (51) is connected to a waste liquid tank (6) arranged outside the housing (1) via a return pipe (52); a fluid pump (53) is provided on the return pipe (52).

4. The highly corrosive waste liquid incineration feeding device according to claim 3 is characterized in that: The waste liquid cylinder (6) is provided with a first liquid inlet pipe (61), a second liquid inlet pipe (62) and a liquid outlet pipe (63); the first liquid inlet pipe (61) is connected to the reflux pipe (52) and a one-way valve is provided between the two; an upper cover (64) is provided at the upper end of the second liquid inlet pipe (62); the outlet pipe (63) is located at the bottom of the waste liquid cylinder (6); and an air inlet (65) is provided on the waste liquid cylinder (6), and the air inlet (65) is connected to the air supply unit.

5. The highly corrosive waste liquid incineration feeding device according to claim 4 is characterized in that: The air supply unit is an air pump (67) or a high-pressure air tank; a one-way valve is provided on the air inlet (65), and the air inlet is provided on the upper part of the waste liquid tank (6).

6. The highly corrosive waste liquid incineration feeding device according to claim 5 is characterized in that: The liquid spraying assembly (4) comprises a plurality of atomizing nozzles fixedly arranged on the top of the liquid spraying section (31), and the atomizing nozzles are all connected to the liquid outlet pipe (63) via a liquid supply pipe.

7. The highly corrosive waste liquid incineration feeding device according to claim 1 or 6, characterized in that: The high-pressure air supply device (7) comprises an air inlet pipe connected to the air inlet (35), the air inlet pipe being connected to the high-pressure fan (71), and a first air guide plate (72) being provided at the air inlet (35).

8. The highly corrosive waste liquid incineration feeding device according to claim 7 is characterized in that: The damper assembly comprises a plurality of partitions (81) which are hinged on the air outlet (34) in parallel and at equal intervals, and the partitions (81) are all connected to an opening and closing driver (82) provided on the housing (1) through a transmission mechanism.

9. The highly corrosive waste liquid incineration feeding device according to claim 8 is characterized in that: The transmission mechanism comprises a rack (83) vertically slidably arranged on the housing (1); the partition (81) is fixedly connected to a hinge shaft (84) and is rotatably matched with the side wall of the air outlet (34) through the hinge shaft (84); a gear is arranged on the hinge shaft (84) and a plurality of hinge shafts are meshed with the rack (83) through the gear; the opening and closing driver (82) is a driving motor fixedly arranged on the housing (1); a gear is arranged on the output shaft of the driving motor and is meshed with the rack (83) through the gear.

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