Multi-stage cyclone desalting incineration boiler for salt-containing waste liquid

Abstract

The utility model discloses a multi-stage cyclone desalting incineration boiler for salt-containing waste liquid, and is suitable for the technical field of industrial waste liquid incineration. The boiler comprises a boiler body, waste liquid spray guns, a low-temperature combustor, a medium-temperature combustor, a smoke outlet, a high-temperature combustor and a slag cooler, the boiler body comprises a low-temperature section boiler, a medium-temperature section boiler and a high-temperature section boiler which are arranged at low, medium and high positions, the low-temperature section boiler is provided with a plurality of waste liquid spray guns which tangentially enter waste liquid of the low-temperature section boiler, and the medium-temperature combustor is arranged above the waste liquid spray guns. A medium-temperature combustor is arranged at the upper part of the medium-temperature section furnace, a high-temperature combustor is arranged at the upper part of the high-temperature section furnace, central pipes are respectively arranged in the low-temperature section furnace, the medium-temperature section furnace and the high-temperature section furnace, connecting pipes are arranged at the tops of the central pipes, and slag coolers are obliquely arranged at the bottoms of the low-temperature section furnace, the medium-temperature section furnace and the high-temperature section furnace; segmented desalination, solid desalination and cyclone desalination are adopted, the desalination efficiency of the incineration boiler is effectively improved, and the device is simple in structure, long in service life, low in cost, low in failure rate, high in safety and small in maintenance workload.

Description

Technical Field

[0001] The utility model relates to an incineration boiler, belonging to the technical field of industrial waste liquid incineration, in particular to a salt-containing waste liquid multi-stage cyclone desalination incineration boiler suitable for the technical field of salt-containing waste liquid incineration. Background Art

[0002] In recent years, the chemical, pharmaceutical, papermaking and other industries have developed rapidly, and the treatment of waste liquid is one of them. The discharge of saline waste liquid, especially industrial saline organic waste liquid, mainly consists of salt, organic matter and water, of which water is the main component, generally accounting for more than 90%. This type of waste liquid needs to be treated specifically, otherwise it will cause serious pollution to the environment. The treatment of this type of waste liquid adopts traditional water treatment technology. Although it can degrade the pollutants and purify the wastewater, it also has the problems of long time consumption, poor effect, and secondary pollution such as sludge / hazardous waste. Therefore, the use of waste liquid incineration to treat this type of wastewater has attracted more and more attention.

[0003] Waste liquid incineration technology can oxidize and decompose waste liquid at high temperature, degrading organic matter and toxic salts into water, carbon dioxide and harmless substances, achieving a thorough purification effect without secondary pollution. Existing incineration equipment has achieved good results in the incineration of high-salt waste liquid, but due to the low removal efficiency of inorganic salts in the incinerator, molten salt causes blockage and high-temperature corrosion of the back-end equipment, resulting in unstable system operation and high energy consumption, which in turn leads to the inability to recycle waste heat and a high failure rate of the complete system, which greatly limits the scope of application and economic efficiency of the technology. Utility Model Content

[0004] Technical problem: The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a multi-stage cyclone desalination incineration boiler for salt-containing waste liquid, which adopts the technical means of segmented desalination, solid desalination and cyclone desalination, so that the incineration boiler has the advantages of high desalination efficiency, long life, low cost, low failure rate, high safety, simple structure and small maintenance workload.

[0005] Technical solution, in order to achieve the above-mentioned purpose, the utility model is a salt-containing waste liquid multi-stage cyclone desalination incineration boiler, including a desalination incineration boiler body, a waste liquid spray gun, a low-temperature burner, a medium-temperature burner, a flue gas outlet, a high-temperature burner and a slag cooler, the desalination incineration boiler includes a low-temperature section furnace, a medium-temperature section furnace and a high-temperature section furnace arranged at low, medium and high positions, the low-temperature section furnace is provided with a plurality of waste liquid spray guns for tangentially entering the low-temperature section furnace waste liquid, a low-temperature burner for tangentially entering and adjusting the temperature in the low-temperature section furnace to 500°C is arranged above the plurality of waste liquid spray guns, and a tangentially entering and adjusting the temperature in the low-temperature section furnace is arranged on the upper part of the medium-temperature section furnace. A medium-temperature burner with a temperature of 750°C in the section furnace, a high-temperature burner is arranged on the upper part of the high-temperature section furnace for tangentially entering and adjusting the temperature in the high-temperature section furnace to 1100°C, and central tubes are arranged inside the low-temperature section furnace, the medium-temperature section furnace and the high-temperature section furnace respectively, wherein a medium-temperature connecting tube tangentially connected to the upper part of the medium-temperature section furnace is arranged on the top of the central tube of the low-temperature section furnace, a high-temperature connecting tube tangentially connected to the upper part of the high-temperature section furnace is arranged on the top of the central tube of the medium-temperature section furnace, and the top of the central tube of the high-temperature section furnace is connected to the flue gas outlet, and the slag cooler is inclined at the bottom of the low-temperature section furnace, the medium-temperature section furnace and the high-temperature section furnace arranged in low, medium and high positions.

[0006] The low-temperature section furnace, medium-temperature section furnace and high-temperature section furnace arranged at low, medium and high positions are vertical furnaces. The height difference of the low, medium and high positions is slightly larger than the diameter of the medium and high temperature connecting pipes. The external structure is a straight tube at the top and a conical tube at the bottom, and the conical tube section accounts for no more than 1 / 2 of the straight tube section.

[0007] The central tubes respectively arranged in the low-temperature section furnace, the medium-temperature section furnace and the high-temperature section furnace are inserted from the top center, and the insertion depth reaches the vicinity of the junction of the conical tube and the straight tube of each section furnace body.

[0008] The low-temperature section furnace, medium-temperature section furnace and high-temperature section furnace arranged at the low, medium and high positions are respectively provided with one or more low-temperature burners, medium-temperature burners and high-temperature burners.

[0009] The low temperature section furnace is provided with a plurality of waste liquid spray guns, 1 to 6 in number, for tangentially entering the waste liquid of the low temperature section furnace.

[0010] The low temperature section furnace is provided with a plurality of waste liquid spray guns which enter the waste liquid of the low temperature section furnace tangentially, and are also provided on the medium temperature section furnace or the high temperature section furnace.

[0011] The slag coolers at the bottom of the low-temperature section furnace, the medium-temperature section furnace and the high-temperature section furnace, which are arranged at low, medium and high positions, are configured as a whole or are configured individually according to each section of the furnace body.

[0012] The temperature in the low-temperature section furnace is 500±50°C, the temperature in the medium-temperature section furnace is 750±50°C, and the temperature in the high-temperature section furnace is 1100±50°C.

[0013] The outer walls of the low-temperature section furnace, the medium-temperature section furnace and the high-temperature section furnace are all provided with a heat-insulating layer.

[0014] Beneficial effects: The utility model is applicable to the technical field of industrial waste liquid incineration. Low-temperature section furnace, medium-temperature section furnace and high-temperature section furnace are arranged at low, medium and high positions. The waste liquid is sprayed into the low-temperature section furnace tangentially through multiple waste liquid spray guns to generate vortex. The furnace temperature of the low-temperature section furnace is about 500℃. 500℃ is when the inorganic salt is in solid state. The vortex wind that enters the furnace tangentially can effectively remove the solid granular inorganic salts. The desalination efficiency of the low-temperature section furnace is ≥95%, which solves the shortcoming of low desalination efficiency of molten inorganic salts. The low-temperature flue gas enters the medium-temperature section furnace tangentially. The temperature in the medium-temperature section furnace is about 750℃. At this temperature, oxygen can be effectively removed. The combustible organic matter is volatilized from the combustion waste liquid, and a vortex is formed again in the medium-temperature furnace to further remove the inorganic salts that have not been completely removed in the low-temperature furnace. The desalination efficiency of the medium-temperature furnace is ≥90%. The flue gas discharged from the medium-temperature furnace enters the high-temperature furnace tangentially. The temperature in the high-temperature furnace is about 1100°C. The combustible organic matter is completely oxidized in the high-temperature furnace. The flue gas in the high-temperature furnace also flows in a vortex. The desalination efficiency of the high-temperature furnace is ≥60%, and the comprehensive desalination efficiency of the incinerator is ≥99.8%, which can effectively avoid problems such as blockage and corrosion of the back-end equipment of the entire system. It has wide practicality in the field of this technology. The main advantages of the utility model compared with the existing salt-containing waste liquid incineration boilers are:

[0015] Multi-stage solid desalination, desalination efficiency up to 99.8%;

[0016] Eliminate molten salt wall corrosion;

[0017] The cyclone structure has a long flue gas residence time and completely removes organic matter;

[0018] Simple structure, low manufacturing cost and low failure rate;

[0019] Safe, reliable, efficient and energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the multi-stage cyclone desalination incineration boiler for salt-containing waste liquid of the utility model.

[0021] Figure 2 It is a schematic diagram of the enlarged structure of the cross section 1 of the low-temperature furnace section of the present invention.

[0022] Figure 3 It is an enlarged structural schematic diagram of the cross section 2 of the low-temperature furnace section of the present utility model.

[0023] Figure 4 It is a schematic diagram of the enlarged cross-section structure of the medium-temperature furnace section of the utility model.

[0024] Figure 5 It is a schematic diagram of the enlarged cross-section structure of the high-temperature furnace section of the utility model.

[0025] Figure 6 It is a schematic diagram of the enlarged structure of the central tube cross section of the utility model.

[0026] In the figure: 1- low temperature section furnace, 2- waste liquid spray gun, 3- low temperature burner, 4- medium temperature connecting pipe, 5- medium temperature section furnace, 6- high temperature connecting pipe, 7- medium temperature burner, 8- high temperature section furnace, 9- flue gas outlet, 10- high temperature burner, 11- center tube, 12- slag cooler. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with an embodiment in the accompanying drawings:

[0028] The utility model discloses a multi-stage cyclone desalination incineration boiler for salt-containing waste liquid, which is mainly composed of a desalination incineration boiler body, a waste liquid spray gun 2, a low-temperature burner 3, a medium-temperature burner 7, a flue gas outlet 9, a high-temperature burner 10 and a slag cooler 12. The desalination incineration boiler comprises a low-temperature section furnace 1, a medium-temperature section furnace 5 and a high-temperature section furnace 8 arranged at low, medium and high positions. The low-temperature section furnace 1, the medium-temperature section furnace 5 and the high-temperature section furnace 8 arranged at low, medium and high positions are vertical furnaces. The height difference of the low, medium and high positions is slightly larger than the diameter of the medium and high temperature connecting pipes. The external structure is a straight tube shape at the top and a conical tube shape at the bottom, and the conical tube section accounts for no more than 1 / 2 of the straight tube section. The low temperature furnace 1 is provided with a plurality of waste liquid spray guns 2 for tangentially entering the waste liquid of the low temperature furnace 1. The number of the plurality of waste liquid spray guns 2 for tangentially entering the waste liquid of the low temperature furnace 1 is 1-6. The plurality of waste liquid spray guns 2 for tangentially entering the waste liquid of the low temperature furnace 1 are also provided on the medium temperature furnace 5 or the high temperature furnace 8. A low temperature burner 3 for tangentially entering and adjusting the temperature in the low temperature furnace 1 to 500°C is provided above the plurality of waste liquid spray guns 2. A medium temperature burner 7 for tangentially entering and adjusting the temperature in the medium temperature furnace 5 to 750°C is provided on the upper part of the medium temperature furnace 5. A high temperature burner 10 for tangentially entering and adjusting the temperature in the high temperature furnace 8 to 1100°C is provided on the upper part of the high temperature furnace 8. The temperature in the low temperature furnace 1 is 500±50°C, the temperature in the medium temperature furnace 5 is 750±50°C, and the temperature in the high temperature furnace 8 is 1100±50°C. The low-temperature section furnace 1, the medium-temperature section furnace 5 and the high-temperature section furnace 8 arranged at the low, medium and high positions are respectively provided with one or more low-temperature burners 3, medium-temperature burners 7 and high-temperature burners 10, which can be 1-5, and each burner is evenly arranged at the top. The low-temperature section furnace 1, the medium-temperature section furnace 5 and the high-temperature section furnace 8 are respectively provided with a central tube 11, wherein the top of the central tube of the low-temperature section furnace 1 is provided with a medium-temperature connecting tube 4 tangentially connected to the upper part of the medium-temperature section furnace 5, the top of the central tube of the medium-temperature section furnace 5 is provided with a high-temperature connecting tube 6 tangentially connected to the upper part of the high-temperature section furnace 8, and the top of the central tube of the high-temperature section furnace 8 is connected to the flue gas outlet 9. The central tubes 11 respectively provided in the low-temperature section furnace 1, the medium-temperature section furnace 5 and the high-temperature section furnace 8 are inserted from the center of the top, and the insertion depth is near the junction of the cone tube and the straight tube of each section furnace body. The slag cooler 12 is tilted at the bottom of the low-temperature section furnace 1, the medium-temperature section furnace 5 and the high-temperature section furnace 8 arranged at low, medium and high positions; the slag cooler 12 tilted at the bottom of the low-temperature section furnace 1, the medium-temperature section furnace 5 and the high-temperature section furnace 8 arranged at low, medium and high positions is configured as a whole, or configured separately according to each section of the furnace body. The outer walls of the low-temperature section furnace 1, the medium-temperature section furnace 5 and the high-temperature section furnace 8 are all provided with a thermal insulation layer, and the central tube 11 in each section of the furnace adopts a water-cooling structure. The three sections of the furnace body are of equal degree, or the furnace bodies of different heights are set according to the site requirements.

[0029] During operation, the temperature in the low temperature section furnace 1 is first raised to about 500°C by the low temperature burner 3, the temperature in the medium temperature section furnace 5 is raised to about 750°C by the medium temperature burner 7, and the temperature in the high temperature section furnace 8 is raised to 1100°C by the high temperature burner 10. The waste liquid is sprayed tangentially into the low temperature section furnace 1 through the spray gun 2. After the waste liquid in the low temperature section furnace 1 is heated, the water volatilizes, the organic matter decomposes, and the inorganic salts gather. The generated flue gas rotates and flows downward from the top of the low temperature section furnace 1. Under the action of the rotating airflow, a cyclone dust removal is formed inside the low temperature section furnace 1. The flue gas flows to the cone tube at the bottom of the low temperature section furnace 1 and is discharged into the medium temperature connecting pipe 4 through the central pipe 11. The flue gas medium temperature connecting pipe 4 is tangentially discharged from the middle The flue gas enters the upper part of the medium temperature furnace 5. At this time, the internal temperature of the medium temperature furnace 5 is about 750℃. The flue gas heats up inside the medium temperature furnace 5 and forms a spiral downward flow. The flue gas forms a cyclone dust removal inside the medium temperature furnace 5 again. It is discharged from the bottom of the medium temperature furnace 5 through the central tube 11 and enters the high temperature connecting pipe 6. It enters the upper part of the high temperature furnace 8 tangentially through the high temperature connecting pipe 6. At this time, the internal temperature of the high temperature furnace 8 is about 1100℃. The incompletely oxidized has the opportunity to be completely oxidized and decomposed in the high temperature furnace 8. The flue gas continues to form a cyclone wind inside the high temperature furnace 8, and the cyclone dust removal effect is achieved for the third time. The flue gas is discharged into the flue gas outlet 9 through the central tube 11, and finally discharged from the incinerator through the flue gas outlet 9. Since the burner is arranged along the tangential direction, the flue gas after combustion presents a tangential cyclone flow. In the furnace, the flue gas spirally flows downward along the furnace wall and is discharged through the central tube 11. The discharged flue gas enters the next level or outside the equipment. The inorganic salts collected after being processed by the low-temperature furnace 1, the medium-temperature furnace 5 and the high-temperature furnace 8 are collected from the bottom of each furnace body into the slag cooler 12. After three-stage cyclone dust removal, the desalination efficiency of the incineration boiler is effectively improved. The spiral flue gas flow increases the residence time of the flue gas, effectively increasing the efficiency of the oxidation and decomposition of organic matter.

Claims

1. A multi-stage cyclone desalination incineration boiler for salt-containing waste liquid, comprising a desalination incineration boiler body, a waste liquid spray gun (2), a low-temperature burner (3), a medium-temperature burner (7), a flue gas outlet (9), a high-temperature burner (10) and a slag cooler (12), characterized in that: The desalination incineration boiler comprises a low-temperature furnace (1), a medium-temperature furnace (5) and a high-temperature furnace (8) arranged at low, medium and high positions. The low-temperature furnace (1) is provided with a plurality of waste liquid spray guns (2) for tangentially entering the waste liquid of the low-temperature furnace (1). A low-temperature burner (3) for tangentially entering and adjusting the temperature in the low-temperature furnace (1) to 500° C. is provided above the plurality of waste liquid spray guns (2). The upper part of the medium-temperature furnace (5) is provided with a medium-temperature burner (7) for tangentially entering and adjusting the temperature in the medium-temperature furnace (5) to 750° C. The upper part of the high-temperature furnace (8) is provided with a medium-temperature burner (7) for tangentially entering and adjusting the temperature in the high-temperature furnace (8) to 110° C. A high-temperature burner (10) of 0°C is provided, and the low-temperature section furnace (1), the medium-temperature section furnace (5) and the high-temperature section furnace (8) are respectively provided with a central tube (11), wherein the top of the central tube of the low-temperature section furnace (1) is provided with a medium-temperature connecting tube (4) tangentially connected to the upper part of the medium-temperature section furnace (5), the top of the central tube of the medium-temperature section furnace (5) is provided with a high-temperature connecting tube (6) tangentially connected to the upper part of the high-temperature section furnace (8), and the top of the central tube of the high-temperature section furnace (8) is connected to the flue gas outlet (9), and the slag cooler (12) is tilted and arranged at the bottom of the low-temperature section furnace (1), the medium-temperature section furnace (5) and the high-temperature section furnace (8) arranged at low, medium and high positions.

2. A multi-stage cyclone desalination incineration boiler for salt-containing waste liquid according to claim 1, characterized in that: The low-temperature section furnace (1), the medium-temperature section furnace (5) and the high-temperature section furnace (8) arranged at low, medium and high positions are vertical furnaces, the height difference of the low, medium and high positions being slightly larger than the diameter of the medium and high temperature connecting pipes, and the external structure is straight tube-shaped at the top and conical tube-shaped at the bottom, and the conical tube section accounts for no more than 1 / 2 of the straight tube section.

3. The multi-stage cyclone desalination and incineration boiler for salt-containing waste liquid according to claim 1, characterized in that: The central tubes (11) respectively arranged in the low temperature section furnace (1), the medium temperature section furnace (5) and the high temperature section furnace (8) are inserted from the top center to a depth close to the junction of the conical tube and the straight tube of each section furnace body.

4. The multi-stage cyclone desalination and incineration boiler for salt-containing waste liquid according to claim 1, characterized in that: The low-temperature section furnace (1), the medium-temperature section furnace (5) and the high-temperature section furnace (8) arranged at low, medium and high positions are respectively provided with one or more low-temperature burners (3), medium-temperature burners (7) and high-temperature burners (10).

5. The multi-stage cyclone desalination and incineration boiler for salty waste liquid according to claim 1, characterized in that: The low temperature section furnace (1) is provided with a plurality of waste liquid spray guns (2), numbering from 1 to 6, for tangentially entering the waste liquid of the low temperature section furnace (1).

6. A multi-stage cyclone desalination incineration boiler for salt-containing waste liquid according to claim 1 or 4, characterized in that: The low temperature section furnace (1) is provided with a plurality of waste liquid spray guns (2) for tangentially entering the waste liquid of the low temperature section furnace (1), and the waste liquid is also provided on the medium temperature section furnace (5) or the high temperature section furnace (8).

7. The multi-stage cyclone desalination and incineration boiler for salty waste liquid according to claim 1, characterized in that: The slag coolers (12) arranged at the bottom of the low-temperature furnace (1), the medium-temperature furnace (5) and the high-temperature furnace (8) at an angle arranged at low, medium and high positions are configured as a whole or configured individually for each furnace body.

8. The multi-stage cyclone desalination and incineration boiler for salt-containing waste liquid according to claim 1, characterized in that: The temperature inside the low-temperature furnace (1) is 500±50°C, the temperature inside the medium-temperature furnace (5) is 750±50°C, and the temperature inside the high-temperature furnace (8) is 1100±50°C.

9. The multi-stage cyclone desalination and incineration boiler for salt-containing waste liquid according to claim 1, characterized in that: The outer walls of the low-temperature section furnace (1), the medium-temperature section furnace (5) and the high-temperature section furnace (8) are all provided with a heat-insulating layer.

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