A main flue jet extraction mixed high-salt wastewater drying system

Abstract

The present invention relates to a main flue jet extraction mixed high-salt wastewater drying system, comprising a dryer cylinder, a jet tube, a jet cap and an air distributor. The interior of the dryer cylinder is provided with a flow channel, which includes an upper conical flow channel and a lower conical flow channel. The bottom small end opening of the upper conical flow channel is connected to the top large end opening of the lower conical flow channel; the top large end opening of the upper conical flow channel is connected to the high-temperature flue gas duct; fillers are piled up in the dryer cylinder; the jet tube is fixedly arranged in the dryer cylinder, and a first connecting port is provided between the lower end wall of the jet tube and the side wall of the dryer cylinder that forms the lower conical flow channel. The jet cap is fixedly arranged in the dryer cylinder, and the interior of the jet cap has a conical channel. The air distributor includes an air distributor plate, and the air distributor plate cover is arranged at the bottom small end opening of the lower conical flow channel. The drying system of the present invention has a simple structure, low cost, good heat transfer effect, and improves the treatment effect of high-salt wastewater.

Description

Technical Field

[0001] The invention belongs to the technical field of high-salt wastewater treatment, and particularly relates to a main flue jet extraction mixed high-salt wastewater drying system. Background Art

[0002] Currently, the main technical approach for treating high-salinity wastewater in industrial production is to use multi-effect evaporation or membrane treatment processes to concentrate and reduce the high-salinity wastewater. The concentrated liquid is then passed through a high-temperature flue gas bypass drying tower or a jet drying fluidized bed for zero-discharge wastewater treatment. The high-temperature flue gas bypass method atomizes the concentrated liquid (filtrate) through a nozzle and sprays it into the drying tower. At the same time, high-temperature flue gas is introduced into the drying tower from the SCR outlet flue. Inside the drying tower, the high-temperature flue gas and the atomized droplets are fully mixed, the water in the wastewater evaporates rapidly, and the salt in the wastewater crystallizes and combines with the ash in the flue gas. The resulting particulate matter enters the dust collector with the flue gas and is captured by the dust collector.

[0003] The jet drying fluidized bed uses self-heating secondary air as the heat source. The hot air is pressurized by the fan and then enters the bottom of the drying bed by self-drying, so that the filler inside the drying bed is in a circulating fluidized state. High-salt wastewater is sprayed onto the surface of the filler through a spray gun. The water in the wastewater is evaporated into water vapor through gas-liquid heat transfer and solid-liquid heat transfer. Salt and particulate matter are precipitated and attached to the surface of the filler. After mutual collision and friction between the fillers, they become tiny dust and flow out from the top of the drying bed with the high-temperature air, and are finally captured by the dust collector.

[0004] The high-temperature flue gas bypass drying tower system has the following problems: the spray gun atomization effect is unstable and the drying tower is prone to clogging; the compressed air consumption is large; the high-temperature flue gas flow field in the drying tower is unevenly distributed and the drying tower is prone to clogging; when the unit is running at low load, the air preheater differential pressure is small, resulting in insufficient flue gas introduced into the drying tower; the liquid flow outside the spray gun outlet is small, and the flow inside is large, so the flue gas and the atomized droplets cannot be fully mixed and contacted.

[0005] The jet drying fluidized bed system has the following problems: the high-temperature booster induced draft fan has low efficiency in the high-temperature stage and the price of the branch unit is high; the equipment system is relatively large and the investment is high. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a main flue jet extraction mixed high-salt wastewater drying system, which solves the technical problems such as the poor effect of high-temperature flue gas bypass drying tower system and jet drying fluidized bed system in treating high-salt wastewater.

[0007] In order to solve the above problems, the technical solution of the present invention is: a main flue jet extraction mixed high-salt wastewater drying system, comprising:

[0008] The dryer cylinder has a flow channel inside, which includes an upper conical flow channel and a lower conical flow channel. The bottom small end opening of the upper conical flow channel is connected to the top large end opening of the lower conical flow channel; the top large end opening of the upper conical flow channel is connected to the high-temperature flue gas duct; fillers are piled up in the dryer cylinder;

[0009] The jet tube is fixedly arranged in the dryer cylinder, and a first communication port is formed between the lower end wall of the jet tube and the side wall of the dryer cylinder forming a lower conical flow channel;

[0010] A jet cap is fixedly arranged in the dryer cylinder, and has a conical channel inside. The top small end opening of the jet cap faces the high-temperature flue gas duct, and the upper end of the jet tube extends into the conical channel through the bottom large end opening of the jet cap, and a second connecting port is provided between the upper end wall of the jet tube and the inner side wall of the jet cap; a third connecting port is provided between the bottom large end wall of the jet cap and the inner side wall of the dryer cylinder; the inner side wall of the jet tube and the inner side wall of the jet cap form a first ascending flow channel, the outer side wall of the jet cap and the inner side wall of the dryer cylinder form a first falling return flow channel, the outer side wall of the jet tube and the inner side wall of the dryer cylinder form a second falling return flow channel, and the outer side wall of the jet tube and the inner side wall of the jet cap form a second ascending flow channel;

[0011] The liquid phase atomization device is installed on the dryer cylinder and is used to atomize the high-salt wastewater to be treated and then spray it onto the filler surface;

[0012] The air distributor includes an air distribution plate, which is covered at the small opening at the bottom end of the lower conical flow channel; an air outlet is provided on the air distribution plate, which is connected to the lower conical flow channel, and the filler is laid on the air distribution plate. The air outlet of the air distribution plate is used to supply high-pressure air into the dryer cylinder.

[0013] Optionally, the jet cap is fixedly connected to the inner wall of the dryer cylinder through a first connecting piece, and the jet cap is fixedly connected to the jet cylinder through a second connecting piece.

[0014] Optionally, the liquid-phase atomization device includes a dual-fluid spray gun, a wastewater interface is provided on the dryer cylinder, and the dual-fluid spray gun extends into the dryer cylinder through the wastewater interface.

[0015] Optionally, a filler filling port is provided on the dryer cylinder.

[0016] Optionally, the air handling unit further comprises:

[0017] An air duct, the air inlet end of which is connected to a booster fan, and the air inlet end of the booster fan is communicated with the external atmosphere;

[0018] Several air ducts, the air inlet ends of several air ducts are connected with the air outlet ends of the air cylinder, and flow regulating valves are provided on several air ducts; several air ducts are fixedly installed on the air distribution plate, and the air outlet end of each air duct extends into the dryer cylinder.

[0019] Optionally, the air ducts located on the periphery among the several air ducts include a first collecting section, an outward expansion section and a second collecting section. The first collecting section is connected to the air duct, the flow regulating valve is arranged on the outward expansion section, and the second collecting section is connected to the air distribution plate.

[0020] Optionally, several air ducts are fixedly arranged on the air distribution plate, the first part of the air ducts are jet tubes, and jet holes are opened at the ends of the jet tubes; the second part of the air ducts are hood tubes, the ends of the hood tubes are closed, and at least one air distribution hole is opened on the side wall of the hood tube.

[0021] Optionally, at least one air distribution hole is provided on the side wall of the jet tube.

[0022] Optionally, the jet tubes are distributed in the middle of the air distribution plate, and the wind cap tubes are distributed on the periphery of the jet tubes.

[0023] Optionally, the angle between the generatrix of the upper tapered flow channel and its axis is a first angle, the angle between the generatrix of the lower tapered flow channel and its axis is a second angle, and the first angle is greater than the second angle.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In the main flue jet exhaust mixed high-salt wastewater drying system of the present invention, the heat source is the waste heat of high-temperature flue gas, and the dryer cylinder is directly connected to the flue connecting the SCR and the dust collector. The amount of high-temperature flue gas is sufficient, which solves the problem of insufficient high-temperature flue gas introduced into the drying tower when the unit is running at low load in the high-temperature flue gas bypass drying tower system. The heat source gas does not pass through the booster fan, which solves the problem of low efficiency of the high-temperature booster induced draft fan of the jet drying fluidized bed in the high-temperature stage and high fan price. The evaporation and drying of high-salt wastewater mainly transfers heat through a variety of heat transfer modes such as heat transfer between high-pressure air and high-temperature flue gas mixture and filler, heat transfer between filler and liquid film, and heat transfer between high-temperature flue gas and liquid film. It has good heat transfer effect, low requirements for spray gun atomization effect, and low compressed air consumption. The water in the high-salt wastewater evaporates and turns into water vapor, while the salt and particulate matter precipitates and adheres to the surface of the packing. After collision and friction between the packings, they turn into tiny dust. After entering the flue with the mixed gas, they are captured and removed by the dust collector, solving the problem of traditional drying towers being clogged due to poor spray gun atomization effect and uneven flue gas distribution. By setting up the jet tube and jet cap, the packing circulates in the dryer cylinder, and at the same time increases the flow range of high-pressure air and high-temperature flue gas in the dryer cylinder, so that the high-pressure air, high-temperature flue gas, packing particles and high-salt wastewater are mixed more evenly, solving the problem of low liquid flow outside the spray gun outlet and large internal flow in the high-temperature flue gas bypass drying tower system, which prevents the flue gas and atomized droplets from fully mixing and contacting.

[0026] 2. In the main flue jet extraction mixed high-salt wastewater drying system of the present invention, the system main structure is small and is directly installed below the flue. The booster fan air source comes directly from the atmosphere without the need for an induced draft duct, which can greatly reduce investment and construction costs.

[0027] 3. In the main flue jet extraction mixed high-salt wastewater drying system of the present invention, the air distributor at the bottom of the dryer cylinder can independently adjust the air volume of each jet hole and air distribution hole through a flow control valve, thereby facilitating the adjustment of the fluidized bed flow field morphology. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the installation of the drying system in the embodiment;

[0029] Figure 2 Schematic diagram of the internal structure of the dryer cylinder in the embodiment;

[0030] Figure 3 This is a side view of the dryer cylinder in the embodiment;

[0031] Figure 4 A three-dimensional diagram of the dryer cylinder in the embodiment;

[0032] Figure 5 Schematic diagram of the distribution of air ducts on the air distribution plate in the embodiment;

[0033] Figure 6 This is a schematic diagram of the operating principle inside the dryer cylinder in the embodiment;

[0034] Figure 7 Schematic diagram of the installation of the air cylinder and the air duct in the embodiment.

[0035] Reference numerals: 1, dryer cylinder; 11, upper conical flow channel; 12, lower conical flow channel; 13, filler; 14, first falling return flow channel; 15, second falling return flow channel; 16, wastewater connection; 17, filler connection; 2, jet tube; 21, jet cap; 22, first rising flow channel; 23, second rising flow channel; 24, first connecting piece; 25, second connecting piece; 3, air distributor; 31, cloth Wind plate; 32. Wind tube; 33. Air duct; 331. Flow regulating valve; 332. Jet tube; 3321. Jet hole; 333. Wind cap tube; 334. Air distribution hole; 335. First collecting section; 336. Outward expansion section; 337. Second collecting section; 34. Booster fan; 341. External atmosphere; 4. Liquid phase atomization device; 5. Flue; 51. SCR; 52. Dust collector; 6. High-salt wastewater. DETAILED DESCRIPTION

[0036] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0037] Example: Figure 1-Figure 7As shown, this embodiment provides a main flue jet extraction mixed high-salt wastewater drying system, including a dryer cylinder 1, a jet tube 2, a jet cap 21 and an air distributor 3. The interior of the dryer cylinder 1 is provided with a flow channel, and the flow channel includes an upper conical flow channel 11 and a lower conical flow channel 12. The bottom small end opening of the upper conical flow channel 11 is connected to the top large end opening of the lower conical flow channel 12; the top large end opening of the upper conical flow channel 11 is connected to the high-temperature flue gas duct 5; a filler 13 is stacked in the dryer cylinder 1; the jet tube 2 is fixedly arranged in the dryer cylinder 1, and a first connecting port is present between the lower end wall of the jet tube 2 and the side wall of the dryer cylinder 1 surrounding the lower conical flow channel 12.

[0038] The jet cap 21 is fixedly arranged in the dryer cylinder 1. The interior of the jet cap 21 has a conical channel. The top small end opening of the jet cap 21 faces the high-temperature flue gas duct 5. The upper end of the jet tube 2 extends into the conical channel through the bottom large end opening of the jet cap 21. There is a second communication port between the upper end wall of the jet tube 2 and the inner side wall of the jet cap 21; there is a third communication port between the bottom large end wall of the jet cap 21 and the inner side wall of the dryer cylinder 1; the inner wall of the jet tube 2 and the jet cap 21 are connected. The inner wall of the flow cap 21 forms a first ascending flow channel 22, a first falling return flow channel 14 is formed between the outer wall of the jet cap 21 and the inner wall of the dryer cylinder 1, a second falling return flow channel 15 is formed between the outer wall of the jet tube 2 and the inner wall of the dryer cylinder 1, and a second ascending flow channel 23 is formed between the outer wall of the jet tube 2 and the inner wall of the jet cap 21; a liquid phase atomization device 4 is arranged on the dryer cylinder 1, and is used to atomize the high-salt wastewater 6 to be treated and then spray it onto the surface of the filler 13.

[0039] The air distributor 3 includes an air distribution plate 31, which is covered at the small opening at the bottom end of the lower conical flow channel 12; an air outlet end is provided on the air distribution plate 31, and the air outlet end of the air distribution plate 31 is connected to the lower conical flow channel 12, and the filler 13 is laid on the air distribution plate 31, and the air outlet end of the air distribution plate 31 is used to deliver high-pressure air into the dryer cylinder 1.

[0040] Through the above arrangement, after the high-pressure air enters the dryer cylinder 1 from the air distributor 3, the filler 13 particles in the dryer cylinder 1 are in a fluidized state and move upward under the action of wind pressure, and come into contact with the high-salt wastewater 6 atomized by the liquid phase atomization device 4. The high-salt wastewater 6 forms a liquid film on the surface of the filler 13, and the filler 13 particles continue to move upward into the flue 5 and come into contact with the high-temperature flue gas. The heat of the high-temperature flue gas is transferred to the liquid film through gas-liquid heat transfer. After absorbing heat, the water in the liquid film evaporates and becomes water vapor. The salt and particulate matter in the high-salt wastewater 6 precipitate and adhere to the surface of the filler 13. During the movement of the filler 13, the fillers 13 collide and rub against each other, causing the salt and particulate matter on the surface of the filler 13 to become tiny dust. The tiny dust enters the flue 5 with the high-pressure air, and is then collected and removed by the electrostatic precipitator, thereby solving the problem of clogging of the drying tower caused by poor spray gun atomization effect and uneven flue gas distribution in the traditional drying tower. After reaching their highest point, filler particles 13 fall from first falling recirculation channel 14 on the side of dryer cylinder 1, passing through the third connecting port, second falling recirculation channel 15, and first connecting port, before returning to the bottom of dryer cylinder 1. There, they are blown upward again by the high-pressure air, forming a circular motion. Simultaneously, the flue gas in flue 5 is affected by the local negative pressure within dryer cylinder 1, causing the high-temperature flue gas to flow downward through first falling recirculation channel 14 within dryer cylinder 1 to the bottom of dryer cylinder 1, where it mixes with the high-pressure air. As filler particles 13 move upward, the high-temperature flue gas heats them.

[0041] The drying system of this embodiment can treat high-salt wastewater 6 generated in the production processes of power plants, chemical plants, etc.

[0042] In the drying system of this embodiment, the heat source is the waste heat of the high-temperature flue gas in the flue 5, which solves the problem of insufficient high-temperature flue gas introduced into the drying tower during low-load operation. Optionally, the flue 5 connects the SCR 51 and the dust collector 52. The high-temperature flue gas in this embodiment does not pass through the booster fan 34, solving the problems of low efficiency and high cost of high-temperature booster induced draft fans in the jet drying fluidized bed during the high-temperature phase. The drying system of this embodiment has a compact main structure and can be installed directly below the flue 5. The booster fan 34 draws air directly from the atmosphere, eliminating the need for an induced draft duct 33, significantly reducing investment and construction costs. The drying of the high-salinity wastewater 6 in this embodiment primarily involves heat transfer between the mixed gas of high-pressure air and high-temperature flue gas and the packing 13, between the packing 13 and the liquid film, and between the high-temperature flue gas and the liquid film. This achieves high heat transfer efficiency, thereby improving wastewater treatment efficiency. The atomization effect of the liquid-phase atomization device 4 is less demanding. The high-temperature flue gas and compressed air work together to fluidize the packing 13, reducing compressed air consumption.

[0043] Specifically, the exterior of the dryer cylinder 1 is trumpet-shaped, and a filler 13 of a certain thickness is provided in the bottom conical area of ​​the dryer cylinder 1. The bottom filler 13 is ejected upward by the high-pressure air blown out from the air outlet of the air distributor 3, and after rising to a certain height in the flue 5 through the jet tube 2 and the jet cap 21, it flows back downward from the outer periphery of the jet cap 21 to the upper part of the air distributor plate 31, and the filler 13 is blown up again by the air outlet of the air distributor 3, forming a cycle. During the upward movement of the high-pressure air through the jet tube 2 and the jet cap 21, a local negative pressure is formed at the first connecting port between the bottom end wall of the jet tube 2 and the inner wall of the dryer cylinder 1, and at the second connecting port between the upper end wall of the jet tube 2 and the inner wall of the jet cap 21. The high-temperature flue gas in the flue 5 flows downward through the return flow channel to mix with the high-pressure air, thereby heating the filler 13 and the high-pressure air.

[0044] In the main flue jet extraction mixed high-salt wastewater drying system of this embodiment, the jet cap 21 is partially located in the upper conical flow channel 11 and partially located in the flue 5, and the jet tube 2 is partially located in the lower conical flow channel 12 and partially located in the upper conical flow channel 11.

[0045] Optionally, the axes of the jet tube 2, the jet cap 21, the upper conical flow channel 11 and the lower conical flow channel 12 coincide with each other and are distributed vertically, so that the dryer cylinder 1 is subjected to balanced forces.

[0046] In the main flue jet extraction mixed high-salt wastewater drying system of this embodiment, the jet cap 21 is fixedly connected to the inner wall of the dryer cylinder 1 through the first connecting piece 24, and the jet cap 21 is fixedly connected to the jet cylinder 2 through the second connecting piece 25.

[0047] Optionally, the first connecting member 24 and the second connecting member 25 may be connected and fixed by a rod.

[0048] In the main flue jet extraction mixed high-salt wastewater drying system of this embodiment, the liquid phase atomization device 4 includes a dual-fluid spray gun, a wastewater interface is provided on the dryer cylinder 1, and the dual-fluid spray gun extends into the dryer cylinder 1 through the wastewater interface.

[0049] Optionally, a wastewater connecting pipe 16 is provided on the side wall of the dryer cylinder 1 that forms the upper conical flow channel 11 , and the pipe opening of the wastewater connecting pipe 16 is the wastewater interface.

[0050] In this embodiment of the main flue jet extraction mixed high-salt wastewater drying system, a packing port is provided on the dryer cylinder 1 for loading packing 13. Optionally, the packing port is provided on the side wall of the dryer cylinder 1 that encloses the lower conical flow channel 12, and is located below the jet tube 2. Specifically, a packing pipe 17 is fixedly connected to the side wall of the dryer cylinder 1, and the opening of the packing pipe 17 forms the packing port.

[0051] In the main flue jet exhaust mixed high-salt wastewater drying system of this embodiment, the air distributor 3 also includes an air duct 32 and a plurality of air ducts 33. The air inlet end of the air duct 32 is connected to the booster fan 34, and the air inlet end of the booster fan 34 is connected to the external atmosphere 341; the air inlet ends of the plurality of air ducts 33 are connected to the air outlet end of the air duct 32, and the plurality of air ducts 33 are provided with flow regulating valves 331; the plurality of air ducts 33 are fixedly penetrated on the air distribution plate 31, and the air outlet end of each air duct 33 extends into the dryer cylinder 1.

[0052] Through the above-mentioned arrangement, a flow regulating valve 331 is provided on each air duct 33, which facilitates the independent adjustment of the air volume of each air duct 33 to adjust the flow field shape in the dryer cylinder 1, thereby ensuring that the filler 13 is in an optimal fluidized state, ensuring that the filler 13 is in full contact with the high-salt wastewater 6 droplets, and enters the flue 5 upward to fully exchange heat with the high-temperature flue gas, and then flows back to the bottom of the dryer cylinder 1 through the reflux flow channel, ensuring that the high-salt wastewater 6 is fully evaporated.

[0053] Optionally, a pressure gauge is provided on each air duct 33 to facilitate measurement of the pressure inside the air duct 33 .

[0054] In the main flue jet extraction mixed high-salt wastewater drying system of this embodiment, a plurality of air ducts 33 are fixedly arranged on the air distribution plate 31, and the first part of the air ducts 33 among the plurality of air ducts 33 are jet tubes 332, and jet holes 3321 are opened at the ends of the jet tubes 332; the second part of the air ducts 33 among the plurality of air ducts 33 are wind cap tubes 333, and the ends of the wind cap tubes 333 are closed, and at least one air distribution hole 334 is opened on the side wall of the wind cap tube 333.

[0055] Through the above arrangement, air distribution holes 334 are positioned on the sidewall of the hood tube 333, expanding the distribution range of high-pressure air within the dryer cylinder 1. The jet tube 332 is used to blow the filler 13 particles upward in a jet motion, allowing them to enter the flue 5 for heat exchange. The number and arrangement of the jet holes 3321, air distribution holes 334, and hood tube 333 are adjusted based on factors such as the thickness of the filler 13, the design flow rate, the properties of the filler 13, and the flow rate of the high-temperature flue gas in the flue 5.

[0056] In the main flue jet extraction mixed high-salt wastewater drying system of this embodiment, the peripheral air ducts 33 among the multiple air ducts 33 each include a first collecting section 335, an outward expansion section 336, and a second collecting section 337. The first collecting section 335 is connected to the air cylinder 32, the flow control valve 331 is provided on the outward expansion section 336, and the second collecting section 337 is connected to the air distribution plate 31. The provision of the outward expansion section 336 facilitates the installation and control of the flow control valve 331.

[0057] In this embodiment of the main flue jet extraction drying system for mixed high-salt wastewater, at least one air distribution hole 334 is defined in the sidewall of the jet pipe 332. The air distribution holes 334 are defined in the sidewalls of both the jet pipe 332 and the air cap pipe 333. This increases the number and distribution range of the air distribution holes 334, expands the distribution range of the high-pressure air, and improves the uniformity of the high-pressure air distribution within the dryer cylinder 1.

[0058] In the main flue jet extraction mixed high-salt wastewater drying system of this embodiment, the jet pipes 332 are distributed in the middle of the air distribution plate 31, and the air cap pipes 333 are distributed around the periphery of the jet pipes 332. The concentrated distribution of the jet pipes 332 in the middle of the air distribution plate 31 provides strong wind force, which facilitates the upward jet movement of the filler particles 13 and facilitates circulation.

[0059] In the main flue jet extraction mixed high-salt wastewater drying system of this embodiment, the angle between the generatrix of the upper conical flow channel 11 and its axis is a first angle, and the angle between the generatrix of the lower conical flow channel 12 and its axis is a second angle. The first angle is greater than the second angle, which reduces the probability of the filler 13 falling into the flue 5 and facilitates the backflow of the filler 13.

[0060] The working principle of the main flue jet extraction mixed high-salt wastewater drying system of this embodiment is as follows: the high-pressure air after being pressurized by the booster fan 34 is distributed in the air distribution device 3 and then enters the bottom of the dryer cylinder 1. The high-pressure air carries the filler 13 particles at the bottom of the dryer cylinder 1 upward. During the upward movement of the filler 13 particles, they come into contact with the high-salt wastewater 6 sprayed by the liquid phase atomization device 4. The high-salt wastewater 6 forms a liquid film on the surface of the filler 13 particles. At the same time, the high-pressure air mixes with the high-temperature flue gas sucked into the dryer cylinder 1, which heats the filler 13 particles and the liquid film. The filler 13 particles pass through the jet cap 21 and enter the flue 5 to be heated. After reaching the highest point, the filler 13 particles flow back downward through the reflux channel in the dryer cylinder 1 to the bottom of the dryer cylinder 1. The filler 13 particles are again ejected upward by the high-pressure air, forming a cycle.

[0061] During the entire fluidization cycle, the high-salinity wastewater 6 forms a liquid film on the surface of the filler particles 13. This film then undergoes gas-to-liquid heat exchange with the mixed gas formed by the high-temperature flue gas and high-pressure air. The high-temperature flue gas heat in the flue 5 also exchanges gas-to-liquid heat with the liquid film, and the heated filler particles 13 exchange solid-to-liquid heat with the liquid film, resulting in effective heat transfer. The water vapor in the high-salinity wastewater 6 evaporates and flows with the flue gas to subsequent treatment processes. Salt and particulate matter precipitate and adhere to the surface of the filler particles 13. During the fluidization process, the particles collide and rub against each other, and against the inner wall of the dryer cylinder 1, turning them into fine powder. This powder is then transported along with the high-pressure air and high-temperature flue gas into the dust removal chamber for capture and removal.

Claims

1. A main flue jet extraction mixed high-salt wastewater drying system, characterized in that: include: The dryer cylinder (1) has a flow channel therein, the flow channel including an upper conical flow channel (11) and a lower conical flow channel (12), the bottom small end opening of the upper conical flow channel (11) is connected to the top large end opening of the lower conical flow channel (12); the top large end opening of the upper conical flow channel (11) is connected to the high-temperature flue gas duct (5); a filler (13) is accumulated in the dryer cylinder (1); The jet tube (2) is fixedly arranged in the dryer cylinder (1), and a first communication port is provided between the lower end wall of the jet tube and the side wall of the dryer cylinder (1) which forms the lower conical flow channel (12); The jet cap (21) is fixedly arranged in the dryer cylinder (1), and has a conical channel inside. The top small end opening of the jet cap (21) faces the high-temperature flue gas duct (5), and the upper end of the jet tube (2) extends into the conical channel through the bottom large end opening of the jet cap (21), and a second communication port is provided between the upper end wall of the jet tube (2) and the inner side wall of the jet cap (21); the bottom large end wall of the jet cap (21) and the inner side wall of the dryer cylinder (1) are connected to each other. There is a third communication port; the inner wall of the jet tube (2) and the inner wall of the jet cap (21) form a first ascending flow channel (22); the outer wall of the jet cap (21) and the inner wall of the dryer cylinder (1) form a first falling return flow channel (14); the outer wall of the jet tube (2) and the inner wall of the dryer cylinder (1) form a second falling return flow channel (15); and the outer wall of the jet tube (2) and the inner wall of the jet cap (21) form a second ascending flow channel (23); A liquid phase atomizing device (4) is provided on the dryer cylinder (1) and is used to atomize the high-salt wastewater (6) to be treated and then spray it onto the surface of the filler (13); The air distributor (3) comprises an air distribution plate (31), which is arranged to cover the bottom small end opening of the lower conical flow channel (12); an air outlet is provided on the air distribution plate (31), the air outlet of the air distribution plate (31) is connected to the lower conical flow channel (12), and the filler (13) is laid on the air distribution plate (31). The air outlet of the air distribution plate (31) is used to send high-pressure air into the dryer cylinder (1).

2. A main flue jet extraction mixed high-salt wastewater drying system according to claim 1, characterized in that: The jet cap (21) is fixedly connected to the inner wall of the dryer cylinder (1) via a first connecting piece (24), and the jet cap (21) is fixedly connected to the jet cylinder (2) via a second connecting piece (25).

3. The main flue jet extraction mixed high-salt wastewater drying system according to claim 1 is characterized in that: The liquid phase atomization device (4) includes a dual-fluid spray gun. A wastewater interface is provided on the dryer cylinder (1), and the dual-fluid spray gun extends into the dryer cylinder (1) through the wastewater interface.

4. The main flue jet extraction mixed high-salt wastewater drying system according to claim 1 is characterized in that: A filler filling port is provided on the dryer cylinder (1).

5. The main flue jet extraction mixed high-salt wastewater drying system according to claim 1 is characterized in that: The air distribution device (3) further comprises: An air duct (32) has an air inlet end connected to a booster fan (34), and an air inlet end of the booster fan (34) is in communication with the external atmosphere (341); A plurality of air ducts (33) are provided, the air inlet ends of the plurality of air ducts (33) are connected to the air outlet ends of the air cylinder (32), and the plurality of air ducts (33) are provided with flow regulating valves (331); the plurality of air ducts (33) are fixedly installed on the air distribution plate (31), and the air outlet end of each air duct (33) extends into the dryer cylinder (1).

6. A main flue jet extraction mixed high-salt wastewater drying system according to claim 5, characterized in that: The peripheral air ducts (33) of the plurality of air ducts (33) each include a first collecting section (335), an outward expansion section (336), and a second collecting section (337); the first collecting section (335) is connected to the air cylinder (32); the flow regulating valve (331) is arranged on the outward expansion section (336); and the second collecting section (337) is connected to the air distribution plate (31).

7. The main flue jet extraction mixed high-salt wastewater drying system according to claim 1 is characterized in that: A plurality of air ducts (33) are fixedly arranged on the air distribution plate (31); a first portion of the air ducts (33) among the plurality of air ducts (33) are jet tubes (332), and jet holes (3321) are provided at the ends of the jet tubes (332); a second portion of the air ducts (33) among the plurality of air ducts (33) are hood tubes (333), and the ends of the hood tubes (333) are closed, and at least one air distribution hole (334) is provided on the side walls of the hood tubes (333).

8. The main flue jet extraction mixed high-salt wastewater drying system according to claim 7 is characterized in that: At least one air distribution hole (334) is formed on the side wall of the jet tube (332).

9. The main flue jet extraction mixed high-salt wastewater drying system according to claim 7 is characterized in that: The jet tube (332) is distributed in the middle of the air distribution plate (31), and the wind cap tube (333) is distributed on the periphery of the jet tube (332).

10. The main flue jet extraction mixed high-salt wastewater drying system according to claim 1 is characterized in that: The angle between the generatrix of the upper conical flow channel (11) and its axis is a first angle, and the angle between the generatrix of the lower conical flow channel (12) and its axis is a second angle, and the first angle is greater than the second angle.

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