Multifunctional incineration system and incineration method thereof

Abstract

The invention relates to a multifunctional incineration system which comprises a waste liquid incinerator, two combustion chambers, a waste heat boiler, a quench tower, a dry type reaction device, a first bag-type dust collector, a first-stage spraying washing tower, a second-stage spraying washing tower, an induced draft fan, a cooling dust collector, a second bag-type dust collector and an air feeder which are sequentially connected. The device further comprises a first cut-off valve, a second cut-off valve, a rotary kiln, an automatic feeding device and a pressure transmitter. The waste liquid incinerator is connected with the two combustion chambers and the air feeder through a first cut-off valve. The waste liquid incinerator is connected with a cooling dust remover through a second cut-off valve; a slag outlet of the waste liquid incinerator is connected with the rotary kiln through an automatic feeding device; a slag outlet of the cooling dust remover and a slag outlet of the second bag-type dust remover are connected with the rotary kiln through an automatic feeding device; pressure transmitters are arranged on the waste liquid incinerator and the rotary kiln and are used for controlling the pressure of the hearth; the multifunctional hazardous waste incineration system is used for incinerating organic waste liquid, edge-containing waste water and solid waste.

Description

Technical Field

[0001] The invention relates to an incineration system, in particular to a multifunctional incineration system and an incineration method thereof. Background Art

[0002] Chemical companies will generate organic waste liquid, saline wastewater and hazardous solid waste during the production process. In particular, the hazardous waste disposed of by hazardous waste disposal centers also includes organic waste liquid, saline wastewater and hazardous solid waste (solid waste). In the current disposal process, waste liquid incinerator systems, saline wastewater incinerator systems and solid waste rotary kiln systems are generally used for incineration treatment, which increases the investment of enterprises and causes duplicate construction and waste of resources. Summary of the invention

[0003] The problem to be solved by the present invention is that when incinerating organic waste liquid, saline wastewater and hazardous solid waste, three incineration systems, namely a waste liquid incinerator system, a saline wastewater incinerator system and a solid waste rotary kiln system, are required, which causes the problem of increased investment and duplicate construction, as well as the problem that the sticky wall and salt slag produced when incinerating saline wastewater still contain harmful components.

[0004] In order to solve the above technical problems, the present invention provides a multifunctional hazardous waste incineration system, which can incinerate organic waste liquid, solid waste and saline wastewater separately, or can incinerate two or three of organic waste liquid, solid waste and saline wastewater at the same time. When incinerating saline wastewater, the salt slag can be purified.

[0005] A multifunctional hazardous waste incineration system, comprising a waste liquid incinerator, a second combustion chamber, a waste heat boiler, a quench tower, a dry reaction device, a first bag dust collector, a first spray washing tower, a second spray washing tower, an induced draft fan, a cooling dust collector, a second bag dust collector and a blower, which are connected in sequence, and also comprises a first shut-off valve, a second shut-off valve, a rotary kiln, an automatic feeding device and a pressure transmitter;

[0006] The waste liquid incinerator is connected to the two combustion chambers and the blower respectively through the first cut-off valve;

[0007] The waste liquid incinerator is connected to the cooling dust collector through the second cut-off valve;

[0008] The slag outlet of the waste liquid incinerator is connected to the rotary kiln through the automatic feeding device;

[0009] The slag outlets of the cooling dust collector and the second bag dust collector are both connected to the rotary kiln through the automatic feeding device;

[0010] The waste liquid incinerator and the rotary kiln are both provided with pressure transmitters for controlling the furnace pressure;

[0011] The multifunctional hazardous waste incineration system is used for incinerating organic waste liquid, hazardous waste water and solid waste.

[0012] Preferably, the cooling dust collector is in the form of a water jacket and is provided with two return paths. A scraper device is provided on each return path. The scraper device is used to regularly clean the inner wall of the water jacket to remove inorganic salts adhering to the wall surface.

[0013] Preferably, when incinerating organic waste liquid, the second shut-off valve is closed and the first shut-off valve is opened, and the organic waste liquid enters the waste liquid incinerator for incineration at a temperature of 850 to 1000°C. The flue gas generated by the waste liquid incinerator enters the second combustion chamber through the second shut-off valve for secondary combustion at a temperature above 1100°C. The flue gas then passes through a waste heat boiler, a quenching tower, a dry reaction device, a first bag dust collector, a first-level spray washing tower and a second-level spray washing tower before being sucked and discharged by an induced draft fan.

[0014] Furthermore, the induced draft fan is controlled to maintain negative pressure in the waste liquid incinerator and the second combustion chamber.

[0015] Preferably, when incinerating solid waste, the second shut-off valve is closed and the first shut-off valve is opened. The solid waste is fed into the rotary kiln for incineration through an automatic feeding device. The incineration temperature is 850-1000°C. The generated flue gas enters the second combustion chamber for secondary combustion. The incineration temperature is above 1100°C. The flue gas then passes through a waste heat boiler, a quenching tower, a dry reaction device, a first bag dust collector, a first-level spray washing tower and a second-level spray washing tower, and is then sucked and discharged by an induced draft fan.

[0016] The induced draft fan is controlled to keep the waste liquid incinerator and the second combustion chamber at negative pressure.

[0017] Preferably, when incinerating salt-containing wastewater, the second shut-off valve is opened and the first shut-off valve is closed, and the salt-containing wastewater enters the waste liquid incinerator for incineration at a temperature of 500-700°C. The generated flue gas enters the cooling dust collector for cooling and dust removal, and the temperature drops to 180-220°C. The flue gas then enters the second bag dust collector to remove inorganic salts entrained in the flue gas. The purified flue gas is sent to the second combustion chamber for secondary combustion through the blower. The incineration temperature is above 1100°C. The flue gas then passes through the waste heat boiler, the quenching tower, the dry reaction device, the first bag dust collector, the first spray washing tower and the second spray washing tower, and is then sucked and discharged by the induced draft fan.

[0018] Furthermore, the inorganic salt dust discharged from the waste liquid incinerator, the cooling dust collector and the second bag dust collector enters the rotary kiln through an automatic feeding device for purification and incineration, and the generated flue gas and the flue gas from the blower enter the second combustion chamber for secondary combustion.

[0019] The induced draft fan is controlled to keep the waste liquid incinerator and the second combustion chamber at negative pressure; the blower is controlled to keep the furnace of the rotary kiln at negative pressure.

[0020] Preferably, when organic waste liquid, saline waste water and solid waste are incinerated at the same time, the second shut-off valve is opened and the first shut-off valve is closed, and the organic waste liquid and saline waste water are sprayed into the waste liquid incinerator for incineration at the same time, and the incineration temperature is 500-700°C. The flue gas generated passes through the cooling dust collector and the second bag dust collector, and is then sent to the second combustion chamber for secondary combustion through the blower. The solid waste is sent to the rotary kiln for incineration through an automatic feeding device, and the incineration temperature is 850-1000°C. The flue gas generated then enters the second combustion chamber for secondary combustion, and the incineration temperature is above 1100°C. The flue gas then passes through the waste heat boiler, the quenching tower, the dry reaction device, the first bag dust collector, the first spray washing tower and the second spray washing tower, and is then sucked and discharged by the induced draft fan.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The multifunctional hazardous waste incineration system provided by the present invention combines three incineration systems, namely, a waste liquid incinerator system, a salt-containing wastewater incinerator system and a solid waste rotary kiln system, into one system, thereby reducing the investment of the enterprise and avoiding duplicate construction. At the same time, a cooling dust collector and a bag dust collector are used to solve the problem of high-temperature melting of inorganic salts, and a rotary kiln is used to purify and refine salt slag to achieve the purpose of recycling salt slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a multifunctional hazardous waste incineration system;

[0024] Figure 2 It is a schematic diagram of the structure of waste liquid incineration;

[0025] Figure 3 It is a schematic diagram of the structure of incineration of solid waste;

[0026] Figure 4 It is a schematic diagram of the structure for incineration of saline wastewater. DETAILED DESCRIPTION

[0027] The present invention will be further described with reference to the accompanying drawings.

[0028] Embodiment 1

[0029] like Figure 1As shown, a multifunctional hazardous waste incineration system includes a waste liquid incinerator 1, a second combustion chamber 2, a waste heat boiler 3, a quench tower 4, a dry reaction device 5, a first bag dust collector 6, a first spray washing tower 7, a second spray washing tower 8, an induced draft fan 9, a cooling dust collector 10, a second bag dust collector 11 and a blower 12, which are connected in sequence, and also includes a first shut-off valve 14, a second shut-off valve 15, a rotary kiln 13, an automatic feeding device and a pressure transmitter; the waste liquid incinerator 1 is connected to the first shut-off valve 14 through the first shut-off valve 14 They are respectively connected to the second combustion chamber 2 and the blower 12; the waste liquid incinerator 1 is connected to the cooling dust collector 10 through the second shut-off valve 15; the slag outlet of the waste liquid incinerator 1 is connected to the rotary kiln 13 through an automatic feeding device; the slag outlets of the cooling dust collector 10 and the second bag dust collector 11 are both connected to the rotary kiln 13 through an automatic feeding device; the waste liquid incinerator 1 and the rotary kiln 13 are both provided with pressure transmitters for controlling the furnace pressure; the multifunctional hazardous waste incineration system is used for incinerating organic waste liquid, waste water and solid waste.

[0030] The cooling dust collector 10 is in the form of a water jacket and is provided with two return paths. A scraper device is provided on each return path. The scraper device is used to regularly clean the inner wall of the water jacket to remove inorganic salts adhering to the wall surface.

[0031] Embodiment 2

[0032] like Figure 2 As shown, when the organic waste liquid is incinerated, the second shut-off valve 15 is closed, and the first shut-off valve 14 is opened, and the organic waste liquid enters the waste liquid incinerator 1 for incineration, and the incineration temperature is 850-1000°C. The flue gas generated by the waste liquid incinerator 1 enters the second combustion chamber 2 through the second shut-off valve 15 for secondary combustion, and the incineration temperature is above 1100°C. The flue gas then passes through the waste heat boiler 3, the quenching tower 4, the dry reaction device 5, the first bag filter 6, the first spray washing tower 7 and the second spray washing tower 8, and is then sucked and discharged by the induced draft fan 9.

[0033] The induced draft fan 9 is controlled to keep the waste liquid incinerator 1 and the second combustion chamber 2 at negative pressure.

[0034] Embodiment 3

[0035] like Figure 3 As shown, when incinerating solid waste, close the second shut-off valve 15, open the first shut-off valve 14, and feed the solid waste into the rotary kiln 13 through the automatic feeding device for incineration at a temperature of 850-1000°C. The generated flue gas enters the second combustion chamber 2 for secondary combustion at a temperature above 1100°C. The flue gas then passes through the waste heat boiler 3, the quench tower 4, the dry reaction device 5, the first bag filter 6, the first spray washing tower 7 and the second spray washing tower 8, and is then sucked and discharged by the induced draft fan 9.

[0036] The induced draft fan 9 is controlled to keep the waste liquid incinerator 1 and the second combustion chamber 2 at negative pressure.

[0037] Embodiment 4

[0038] like Figure 4 As shown, when the salt-containing wastewater is incinerated, the second shut-off valve 15 is opened, the first shut-off valve 14 is closed, the salt-containing wastewater enters the waste liquid incinerator 1 for incineration, the incineration temperature is 500-700°C, to ensure that the inorganic salt will not melt, the generated flue gas enters the cooling dust collector 10 for cooling and dust removal, the temperature drops to about 200°C, the flue gas then enters the second bag filter 11 to remove the inorganic salt entrained in the flue gas, the purified flue gas is sent to the second combustion chamber 2 for secondary combustion through the blower 12, the incineration temperature is above 1100°C, the flue gas then passes through the waste heat boiler 3, the quench tower 4, the dry reaction device 5, the first bag filter 6, the first spray washing tower 7 and the second spray washing tower 8, and is then sucked and discharged by the induced draft fan 9.

[0039] The inorganic salt dust discharged from the waste liquid incinerator 1, the cooling dust collector 10 and the second bag dust collector 11 enters the rotary kiln 13 through the automatic feeding device for purification and incineration. The salt slag after incineration is reused, and the generated flue gas and the flue gas from the blower 12 enter the second combustion chamber 2 for secondary combustion.

[0040] Control the induced draft fan 9 to keep the waste liquid incinerator 1 and the second combustion chamber 2 at negative pressure;

[0041] The blower 12 is controlled to keep the furnace of the rotary kiln 13 at a negative pressure.

[0042] In the incineration treatment of salt-containing wastewater, low-temperature incineration in an incinerator is usually used to prevent the inorganic salt from melting, and the flue gas then enters the second combustion chamber 2 for secondary combustion. The problem is that since the salt-containing wastewater spends very short time in the furnace, the salt slag that comes out still contains harmful components. At the same time, the flue gas coming out of the waste liquid incinerator 1 contains inorganic salt dust, and the inorganic salt melts and sticks to the wall during the secondary combustion.

[0043] The cooling dust collector 10 is in the form of a water jacket and is provided with two return strokes. A scraper device is provided in each return stroke and is driven by a cylinder to regularly clean the inner wall of the water jacket to remove inorganic salts adhering to the wall surface.

[0044] Embodiment 5

[0045] like Figure 4As shown, when the organic waste liquid, saline waste water and solid waste are incinerated at the same time, the second shut-off valve 15 is opened, the first shut-off valve 14 is closed, the organic waste liquid and saline waste water are sprayed into the waste liquid incinerator 1 for incineration at the same time, the incineration temperature is 500-700°C, the generated flue gas passes through the cooling dust collector 10 and the second bag dust collector 11, and is sent to the second combustion chamber 2 for secondary combustion through the blower 12, the solid waste is sent to the rotary kiln 13 for incineration through the automatic feeding device, the incineration temperature is 850-1000°C, the generated flue gas enters the second combustion chamber 2 for secondary combustion, the incineration temperature is above 1100°C, the flue gas passes through the waste heat boiler 3, the quench tower 4, the dry reaction device 5, the first bag dust collector 6, the first spray washing tower 7 and the second spray washing tower 8, and is sucked and discharged by the induced draft fan 9.

[0046] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A multifunctional hazardous waste incineration system, characterized in that: The invention comprises a waste liquid incinerator (1), two combustion chambers (2), a waste heat boiler (3), a quench tower (4), a dry reaction device (5), a first bag dust collector (6), a first spray washing tower (7), a second spray washing tower (8), an induced draft fan (9), a cooling dust collector (10), a second bag dust collector (11) and a blower (12) which are connected in sequence, and also comprises a first shut-off valve (14), a second shut-off valve (15), a rotary kiln (13), an automatic feeding device and a pressure transmitter; The waste liquid incinerator (1) is connected to the two combustion chambers (2) and the blower (12) respectively through the first shut-off valve (14); The waste liquid incinerator (1) is connected to the cooling dust collector (10) via the second cut-off valve (15); The slag outlet of the waste liquid incinerator (1) is connected to the rotary kiln (13) via the automatic feeding device; The slag outlets of the cooling dust collector (10) and the second bag dust collector (11) are both connected to the rotary kiln (13) via the automatic feeding device; The waste liquid incinerator (1) and the rotary kiln (13) are both provided with pressure transmitters for controlling furnace pressure; The multifunctional hazardous waste incineration system is used for incinerating organic waste liquid, hazardous waste water and solid waste.

2. A multifunctional hazardous waste incineration system according to claim 1, characterized in that: The cooling dust collector (10) is in the form of a water jacket and is provided with two return paths. A scraper device is provided on each return path. The scraper device is used to regularly clean the inner wall of the water jacket to remove inorganic salts adhering to the wall surface.

3. The incineration method of a multifunctional hazardous waste incineration system according to claim 1 is characterized in that: When incinerating organic waste liquid, the second shut-off valve (15) is closed and the first shut-off valve (14) is opened, and the organic waste liquid enters the waste liquid incinerator (1) for incineration at a temperature of 850 to 1000° C. The flue gas generated by the waste liquid incinerator (1) enters the second combustion chamber (2) for secondary combustion through the second shut-off valve (15) at a temperature of more than 1100° C. The flue gas then passes through the waste heat boiler (3), the quench tower (4), the dry reaction device (5), the first bag filter (6), the first spray washing tower (7) and the second spray washing tower (8), and is then sucked and discharged by the induced draft fan (9).

4. The incineration method of a multifunctional hazardous waste incineration system according to claim 3 is characterized in that: The induced draft fan (9) is controlled to maintain negative pressure in the waste liquid incinerator (1) and the second combustion chamber (2).

5. The incineration method of a multifunctional hazardous waste incineration system according to claim 1, characterized in that: When incinerating solid waste, the second shut-off valve (15) is closed and the first shut-off valve (14) is opened. The solid waste is fed into the rotary kiln (13) for incineration through the automatic feeding device. The incineration temperature is 850-1000°C. The generated flue gas enters the second combustion chamber (2) for secondary combustion. The incineration temperature is above 1100°C. The flue gas then passes through the waste heat boiler (3), the quenching tower (4), the dry reaction device (5), the first bag filter (6), the first spray washing tower (7) and the second spray washing tower (8), and is then sucked and discharged by the induced draft fan (9).

6. The incineration method of a multifunctional hazardous waste incineration system according to claim 5, characterized in that: The induced draft fan (9) is controlled to maintain negative pressure in the waste liquid incinerator (1) and the second combustion chamber (2).

7. The incineration method of a multifunctional hazardous waste incineration system according to claim 1, characterized in that: When the salt-containing wastewater is incinerated, the second shut-off valve (15) is opened and the first shut-off valve (14) is closed. The salt-containing wastewater enters the waste liquid incinerator (1) for incineration at a temperature of 500-700° C. The generated flue gas enters the cooling dust collector (10) for cooling and dust removal. The temperature drops to 180-220° C. The flue gas then enters the second bag filter (11) to remove inorganic salts entrained in the flue gas. The purified flue gas is sent to the second combustion chamber (2) for secondary combustion through the blower (12). The incineration temperature is above 1100° C. The flue gas then passes through the waste heat boiler (3), the quench tower (4), the dry reaction device (5), the first bag filter (6), the first spray washing tower (7) and the second spray washing tower (8), and is then sucked and discharged by the induced draft fan (9).

8. The incineration method of a multifunctional hazardous waste incineration system according to claim 7, characterized in that: The inorganic salt dust discharged from the waste liquid incinerator (1), the cooling dust collector (10) and the second bag dust collector (11) enters the rotary kiln (13) through an automatic feeding device for purification and incineration, and the generated flue gas and the flue gas from the blower (12) enter the second combustion chamber (2) for secondary combustion.

9. The incineration method of a multifunctional hazardous waste incineration system according to claim 7, characterized in that: The induced draft fan (9) is controlled to maintain negative pressure in the waste liquid incinerator (1) and the second combustion chamber (2); and the blower (12) is controlled to maintain negative pressure in the furnace of the rotary kiln (13).

10. The incineration method of a multifunctional hazardous waste incineration system according to claim 1, characterized in that: When the organic waste liquid, salt-containing waste water and solid waste are incinerated simultaneously, the second shut-off valve (15) is opened and the first shut-off valve (14) is closed. The organic waste liquid and salt-containing waste water are simultaneously sprayed into the waste liquid incinerator (1) for incineration at a temperature of 500-700° C. The generated flue gas passes through a cooling dust collector (10) and a second bag dust collector (11) and is then sent to the second combustion chamber (2) for secondary combustion via a blower (12). The solid waste is sent to the rotary kiln (13) for incineration via an automatic feeding device at a temperature of 850-1000° C. The generated flue gas then enters the second combustion chamber (2) for secondary combustion at a temperature of more than 1100° C. The flue gas then passes through a waste heat boiler (3), a quench tower (4), a dry reaction device (5), a first bag dust collector (6), a first spray washing tower (7) and a second spray washing tower (8) and is then sucked and discharged by an induced draft fan (9).

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