CN115095875A - Sodium-salt-containing waste liquid incineration waste heat boiler device - Google Patents
Sodium-salt-containing waste liquid incineration waste heat boiler device Download PDFInfo
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- CN115095875A CN115095875A CN202210782582.8A CN202210782582A CN115095875A CN 115095875 A CN115095875 A CN 115095875A CN 202210782582 A CN202210782582 A CN 202210782582A CN 115095875 A CN115095875 A CN 115095875A
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- transfer section
- sodium salt
- steam
- heat transfer
- waste liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
Abstract
The invention discloses a sodium salt-containing waste liquid incineration waste heat boiler device, wherein a vertical incinerator and a sodium salt-containing waste liquid incineration waste heat boiler device steam-water system are integrally arranged, sodium salt waste liquid is incinerated by the vertical incinerator to generate flue gas, the flue gas is subjected to salt discharge and temperature reduction through a heating surface of the vertical incinerator and the steam-water system, the heating surface of the vertical incinerator and the steam-water system absorb the heat of the flue gas, and steam-water mixture generated by water supply enters a boiler barrel through a steam-water connecting pipe. The problem of the heating surface of the sodium salt bonding device is solved, the sodium salt-containing waste liquid can be economically and environmentally treated, and the incineration heat is converted into steam for production and use.
Description
Technical Field
The invention relates to the field of chemical sodium salt-containing treatment and heat energy recovery, in particular to a sodium salt-containing waste liquid incineration waste heat boiler device.
Background
In recent years, industries such as chemical industry, pharmacy, papermaking and the like are rapidly developed, waste salt is one of the problems, and the discharge of salt-containing waste liquid, particularly industrial salt-containing organic waste liquid, not only contains high-concentration salt, but also contains a large amount of toxic and difficultly-degradable organic matters. The salt-containing waste liquid treatment technology is difficult and high in cost, and fused salt carried in high-temperature flue gas after waste liquid incineration can cause blockage of a waste heat boiler and influence normal operation of a system.
The existing boiler waste heat recovery equipment is not suitable for recovering the waste heat of high-temperature flue gas generated by burning salt-containing waste liquid, molten salt exists in the flue gas due to the high-temperature burning of the sodium salt-containing waste liquid, the molten salt is adhered to a water wall and a heat exchange tube and is difficult to remove in the traditional boiler, so that the heat exchange efficiency of the boiler is greatly reduced, the exhaust gas temperature is increased, and finally, the accumulated amount of the waste heat is increased, the running time is not long, and the flue is blocked, so that the production is stopped.
Disclosure of Invention
The invention aims to provide a sodium salt-containing waste liquid incineration waste heat boiler device which can economically and environmentally treat sodium salt-containing waste liquid, recover heat of high-temperature flue gas containing molten salt after incineration and convert the heat into steam, prevent frequent shutdown and maintenance caused by molten salt blockage and the like and enable equipment to stably operate for a long time.
In order to achieve the above purpose, the content of the invention is as follows:
a sodium salt-containing waste liquid incineration waste heat boiler device is characterized in that a vertical incinerator and a sodium salt-containing waste liquid incineration waste heat boiler device steam-water system are integrated;
sodium salt waste liquid is incinerated by a vertical incinerator to generate high-temperature flue gas, and the flue gas is subjected to salt discharge and temperature reduction by the vertical incinerator and a steam-water system;
heating surfaces in the vertical incinerator and the steam-water system absorb smoke heat to generate a steam-water mixture, and the steam-water mixture generated by water supply enters the boiler barrel through a steam-water connecting pipe.
Preferably, the system also comprises a high-temperature liquid salt discharge facility, a flue solid salt discharge facility and a tail flue solid salt discharge facility;
the high-temperature liquid salt discharge facility is arranged at the bottom of the vertical incinerator and the first radiant heat transfer section and is shared by the vertical incinerator and the first radiant heat transfer section;
the flue solid salt-discharging facility is arranged at the bottom of the second radiation heat-transfer section and the bottom of the convection heat-transfer section;
the tail flue solid salt discharging facility is arranged at the tail of the sodium salt-containing waste liquid incineration waste heat boiler device.
Preferably, a heating nozzle is arranged at an outlet of the high-temperature liquid salt discharging facility;
and the flue solid salt discharging facility and the tail flue solid salt discharging facility are both provided with mechanical vibration devices.
Preferably, the vertical incinerator comprises a first radiant heat transfer section, a second radiant heat transfer section and a convection heat transfer section, and the vertical incinerator is sequentially communicated with the first radiant heat transfer section, the second radiant heat transfer section and the convection heat transfer section through a flue.
Preferably, the flue gas heat exchanger further comprises a convection heat exchange tube, an economizer and a superheater, wherein the superheater and the convection heat exchange tube are arranged in the convection heat transfer section, and the economizer is arranged in the tail flue.
Preferably, the smoke passing mode between the second radiant heat transfer section and the convection heat transfer section is baffling.
Preferably, the feed water passes through the economizer, the convection heat transfer section, the convection heat exchange tube, the superheater, the second radiation heat transfer section, the first radiation heat transfer section and the heating surface of the vertical incinerator.
Preferably, the feed water absorbs steam-water mixture generated by heat of the heating surface of the cold water wall and enters the boiler barrel, and a steam-water separation device is arranged in the boiler barrel.
Further, the steam in the drum enters a steam using place.
Above-mentioned contain sodium salt waste liquid incineration exhaust-heat boiler device can handle and contain sodium salt waste liquid, will burn heat conversion for steam and supply follow-up use to the sodium salt is difficult for gluing on the water-cooling wall, also can not glue and lead to the quick variation of heat transfer effect or even block up the flue on the heat convection tube.
The invention has the following beneficial effects:
(1) the vertical incinerator and the waste heat boiler steam-water system adopt an integrated design, so that the equipment manufacturing cost is reduced, the water circulation loop is simple, and the system is safe and reliable.
(2) The salt discharging device is provided with the heating fire nozzle and the mechanical vibration device, salt hardening and bridging are prevented, the blocking phenomenon of a salt discharging port is reduced to the maximum extent, and equipment faults are reduced.
(3) The three flue gas heat exchange chambers are arranged, so that the effective reduction of the flue gas temperature is ensured, sodium salt is separated out, and the solid-state sodium salt bonding of a heating surface in a subsequent device is reduced.
(4) And various soot blowers are adopted, and soot blowing modes are different under different working conditions, so that the soot blowing effect is good, and the cost is reduced.
(5) Guarantee through above means that the device operation is reliable, can handle the salt waste liquid, guarantee the long-term steady operation of device, can realize heat recovery again, realize economic benefits in saving two aspects of the processing expense of sodium salt waste liquid and energy recycle.
Drawings
FIG. 1 is a schematic diagram of a sodium salt-containing waste liquid incineration waste heat boiler device;
FIG. 2 is a steam-water system diagram of a sodium salt-containing waste liquid incineration waste heat boiler device.
The system comprises a boiler barrel 1, a vertical incinerator 2, a first radiation heat transfer section 3, a second radiation heat transfer section 4, a high-temperature liquid salt discharging facility 5, a steam-water connecting pipe 6, a flue solid salt discharging facility 7, a convection heat exchange pipe 8, an economizer 9, a tail flue solid salt discharging facility 10, a convection heat transfer section 11, a cooling chamber 12 and a superheater 13.
Detailed Description
The embodiments of the present application are described in further detail below, and it is apparent that the described examples are only a part of the examples of the present application, and are not exhaustive of all the examples. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the principles of the invention, and these are intended to be included within the scope of the invention.
The invention discloses a sodium salt-containing waste liquid incineration waste heat boiler device which can economically and environmentally treat salt-containing waste liquid and convert incineration heat into steam to be used in a steam pipe network in a plant. The problems of salt-containing waste liquid treatment, heat recovery and easy adhesion of sodium salt to the heating surface of the device are solved, the environment is protected, the energy is saved, the consumption is reduced, and a meaningful device is provided for the high-sodium coal combustion utilization technology in eastern areas.
As shown in figure 1, the invention provides a sodium salt-containing waste liquid incineration waste heat boiler device which comprises a boiler barrel 1, a vertical incinerator 2, a first radiant heat transfer section 3, a second radiant heat transfer section 4, a high-temperature liquid salt discharge facility 5, a steam-water connecting pipe 6, a flue solid salt discharge facility 7, a convection heat exchange evaporation pipe 8, an economizer 9, a tail flue solid salt discharge facility 10, a convection heat transfer section 11, heating surfaces and various heating surfaces of water cooling walls of the waste heat boiler, a supporting steel frame, an operation platform, a soot blowing system and a heat insulation system.
The vertical incinerator 2 adopts a top burning structure, sodium salt-containing waste liquid enters from the top of the vertical incinerator 2, the sodium salt-containing waste liquid is ignited by a burner to generate high-temperature flue gas, a combustion-supporting gas and a graded air distribution air inlet nozzle are arranged on the water-cooled wall of the vertical incinerator 2 along the side wall in a spiral direction, so that the high-temperature flue gas rotates downwards along the inner wall of the vertical incinerator 2, the residence time of the high-temperature flue gas in the vertical incinerator 2 is more than or equal to 2s, and the high-temperature flue gas is fully combusted.
The high-temperature flue gas generated by burning the waste liquor containing sodium salt is more than or equal to 1150 ℃, the temperature of the flue gas at the outlet of the vertical incinerator 2 is more than or equal to 1100 ℃ after the heat of the flue gas is absorbed by the heating surface of the water-cooled wall of the vertical incinerator 2, and the water inlet and outlet of the water-cooled wall of the incinerator is connected with the boiler barrel of the waste heat boiler.
The sodium salt in the vertical incinerator 2 is in a molten state, and the molten sodium salt flows downwards along the casting material in the vertical incinerator 2, finally is collected at the bottom of the vertical incinerator 2 and is discharged through a bottom high-temperature liquid salt discharging facility 5.
The cooled flue gas enters the first radiation heat transfer section 3 through the connecting flue, the temperature of the flue gas is reduced through the first radiation heat transfer section 3, and the heat is partially absorbed;
the sodium salt of molten state in the flue gas is along 3 water-cooled walls of first radiation heat transfer section 5 discharge of high temperature liquid salt discharging device 5 that converge bottom downwards, and one set of high temperature liquid salt discharging device 5 of first radiation heat transfer section 3 and vertical incinerator 2 sharing, salt discharging port set up the natural gas heating burner, prevent that the salt discharging port from blockking up to be provided with water-cooling salt discharging facility.
The flue gas cooled by the first radiant heat transfer section 3 enters a second radiant heat transfer section 4 along a connecting flue, and the flue gas is further cooled to be below the melting point of salt by the second radiant heat transfer section 4; at the moment, the sodium salt is in a solid state, the sodium salt is blown off through shock wave soot blowers arranged on heating surfaces of the cold water walls, the solid salt falls into the lower collecting hopper under the action of gravity, a mechanical vibration loosening device is arranged at the bottom of the sodium salt, a vibration motor can be started when the solid salt is damp and hardened, hardening and bridging are avoided, and finally the solid salt is discharged from the flue solid salt discharging device 7.
The invention adopts a two-section radiation type cooling design of the first radiation heat transfer section 3 and the second radiation heat transfer section 4, and fully utilizes the heating surface to absorb the heat in the flue gas, so that the flue gas is cooled. The sodium salt becomes solid dust after the flue gas is cooled, so that the bonding of the heating surface of the subsequent device by the solid sodium salt is reduced, and the damage to equipment is reduced.
The flue gas flowing out of the lower part of the second radiant heat transfer section 4 enters the convection heat transfer section 11 and the economizer 9 from the lower part of the second radiant heat transfer section 4 through baffling, and the waste heat of the flue gas is further recovered;
the flue gas recovers heat through the convection heat exchange tubes 8 in the convection heat transfer section, sodium salt dust attached to the heat exchange surface is blown off through the long telescopic steam soot blower, and the sodium salt falls into the flue solid salt discharging device 7 under the action of gravity and is discharged together with the solid sodium salt separated out from the second radiation heat transfer section 4.
The flue gas passes through the coal economizer 9 and then goes to a subsequent flue gas treatment facility to be subjected to purification treatment of systems such as cloth bag dust removal, SCR denitration and the like, and the temperature of the flue gas can be controlled according to the process requirement;
the sodium salt in a solid state is generated in the process that the flue gas passes through the coal economizer 9, blown down by the rotary steam soot blower and discharged out of the boiler by the solid salt discharging facility 10 of the tail flue.
As shown in figure 1, the sodium salt-containing waste liquid incineration waste heat boiler device disclosed by the invention has the advantages that through a three-stage cooling design, the three-stage cooling design comprises two radiation heat transfer sections and a convection heat transfer section, the temperature of flue gas is cooled to a state that sodium salt is separated out of solid before the flue gas enters a convection heating surface by fully utilizing the cooling of the heating surface and the deflection of the flue gas, and a large amount of sodium salt is prevented from being adhered to the convection heating surface.
Different soot blowers are adopted according to different temperatures and heating surface structures, so that the good soot blowing effect is ensured, the cost is reduced, the mechanical vibration loosening device can be opened when the solid sodium salt is wetted and hardened, the hardening and bridging are avoided, and the economic and reliable treatment device is provided for treating the sodium salt-containing waste liquid.
As shown in fig. 2, which is a schematic view of a steam-water system of the waste liquid incineration heat boiler device containing sodium salt according to the present invention, the temperature of the pretreated feed water is generally about 105 ℃.
The feed water enters the waste liquid incineration waste heat boiler device containing sodium salt, and is heated and warmed up through the economizer 9, the waste liquid incineration waste heat boiler device containing sodium salt is provided with a centralized downcomer, and the unsaturated water is distributed to enter the vertical incinerator 2, the first radiant heat transfer section 3, the second radiant heat transfer section 4, the convection heat transfer section 11 and the lower header (not shown in the figure) through the centralized downcomer. Unsaturated water absorbs heat in each heating surface of the sodium salt-containing waste liquid incineration waste heat boiler device, including the coal economizer 9, the cooling chamber 12 and the convection heat exchange tube 8, and becomes a steam-water mixture. Wherein the cooling chamber 12 comprises a first radiant heat transfer section 3, a second radiant heat transfer section 4 and a convective heat transfer section 11.
The steam-water mixture rises to the top of the sodium salt-containing waste liquid incineration waste heat boiler device due to the fact that the density of the steam-water mixture becomes small, the steam-water mixture enters the boiler barrel 1 through the top connecting pipe, a steam-water separation device is arranged in the boiler barrel 1, steam in the steam-water mixture is separated, the separated steam is led to a steam using place from a saturated steam leading-out pipe at the top of the boiler barrel 1, if the steam needs to be overheated, the steam is led to an inlet header of a superheater 13, and the steam is heated by a coil pipe of the superheater 13 and then is sent to the steam using place.
As shown in fig. 2, the steam-water system diagram of the waste liquid incineration waste heat boiler device containing sodium salt realizes heat recovery from the waste liquid containing sodium salt, and converts the heat into energy for use.
The invention adopts the integrated design of the vertical incinerator and the waste heat boiler steam-water system, reduces the manufacturing cost of equipment, has simple water circulation loop and safe and reliable system, realizes heat energy recovery through water circulation, converts the heat energy into steam, can directly provide the heat energy required by industrial production and people life, can also convert the heat energy into mechanical energy through a steam power device, or converts the mechanical energy into electric energy through a generator, and realizes economic benefit.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (9)
1. A sodium salt-containing waste liquid incineration waste heat boiler device is characterized in that a vertical incinerator (2) and a sodium salt-containing waste liquid incineration waste heat boiler device steam-water system are arranged integrally;
the sodium salt waste liquid is incinerated by a vertical incinerator (2) to generate high-temperature flue gas, and the high-temperature flue gas is subjected to salt discharge and temperature reduction by the vertical incinerator (2) and a steam-water system;
the vertical incinerator (2) and the heating surface in the steam-water system absorb the heat of the flue gas, and the steam-water mixture generated by water supply enters the drum (1) through the steam-water connecting pipe (6).
2. The sodium salt-containing waste liquid incineration waste heat boiler device according to claim 1, further comprising a high-temperature liquid salt discharge facility (5), a flue solid salt discharge facility (7) and a tail flue solid salt discharge facility (10);
the high-temperature liquid salt discharge facility (5) is arranged at the bottoms of the vertical incinerator (2) and the first radiant heat transfer section (3) and is shared by the vertical incinerator (2) and the first radiant heat transfer section (3);
the flue solid salt discharging facility (7) is arranged at the bottoms of the second radiation heat transfer section (4) and the convection heat transfer section (11);
the tail flue solid salt discharging facility (10) is arranged at the tail of the sodium salt-containing waste liquid incineration waste heat boiler device.
3. The sodium salt-containing waste liquid incineration waste heat boiler device according to claim 2, characterized in that:
the outlet of the high-temperature liquid salt discharging facility (5) is provided with a heating nozzle;
and the flue solid salt discharging facility (7) and the tail flue solid salt discharging facility (10) are both provided with mechanical vibration devices.
4. The sodium salt-containing waste liquid incineration waste heat boiler device according to claim 1, comprising a first radiant heat transfer section (3), a second radiant heat transfer section (4) and a convection heat transfer section (11), wherein the vertical incinerator (2) is communicated with the first radiant heat transfer section (3), the second radiant heat transfer section (4) and the convection heat transfer section (11) in sequence through a flue.
5. The sodium salt-containing waste liquid incineration waste heat boiler device as recited in claim 1, further comprising a convection heat exchange pipe (8), an economizer (9) and a superheater (13), wherein the superheater (13) and the convection heat exchange pipe (8) are arranged in the convection heat section (11), and the economizer (9) is arranged in the tail flue.
6. The sodium salt-containing waste liquid incineration waste heat boiler device according to claim 1, characterized in that the flue gas passing manner between the second radiant heat transfer section and the convection heat transfer section (11) is a baffle.
7. The sodium salt-containing waste liquid incineration waste heat boiler device as recited in claim 1, characterized in that the feed water passes through the heating surfaces of the economizer (9), the convection heat transfer section (11), the convection heat exchange tube (8), the superheater (13), the second radiant heat transfer section (4), the first radiant heat transfer section (3) and the vertical incinerator (2).
8. The sodium salt-containing waste liquid incineration waste heat boiler device according to claim 7, wherein the feed water absorbs a steam-water mixture generated by heat of the heating surface of the cold water wall and enters the boiler barrel (1), and a steam-water separation device is arranged in the boiler barrel (1).
9. The sodium salt-containing waste liquid incineration exhaust-heat boiler device according to claim 1, characterized in that the steam in the boiler barrel (1) enters a steam using place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210782582.8A CN115095875A (en) | 2022-07-05 | 2022-07-05 | Sodium-salt-containing waste liquid incineration waste heat boiler device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210782582.8A CN115095875A (en) | 2022-07-05 | 2022-07-05 | Sodium-salt-containing waste liquid incineration waste heat boiler device |
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| CN115095875A true CN115095875A (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210782582.8A Pending CN115095875A (en) | 2022-07-05 | 2022-07-05 | Sodium-salt-containing waste liquid incineration waste heat boiler device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115539969A (en) * | 2022-10-13 | 2022-12-30 | 山东龙之源节能环保科技有限公司 | Desulfurization waste acid making incineration system |
-
2022
- 2022-07-05 CN CN202210782582.8A patent/CN115095875A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115539969A (en) * | 2022-10-13 | 2022-12-30 | 山东龙之源节能环保科技有限公司 | Desulfurization waste acid making incineration system |
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