CN214407012U - Titanium white powder calcining rotary kiln flue gas waste heat boiler - Google Patents
Titanium white powder calcining rotary kiln flue gas waste heat boiler Download PDFInfo
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- CN214407012U CN214407012U CN202023111581.6U CN202023111581U CN214407012U CN 214407012 U CN214407012 U CN 214407012U CN 202023111581 U CN202023111581 U CN 202023111581U CN 214407012 U CN214407012 U CN 214407012U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a titanium white powder calcining rotary kiln flue gas waste heat boiler, which is arranged in a horizontal structure and comprises a steam pocket, a heat exchange module and a transition flue, wherein the heat exchange module is sequentially composed of a steam superheater module, an evaporator module and a coal economizer module, the steam superheater module and the evaporator module, and the evaporator module and the coal economizer module are all connected through the transition flue, the steam superheater module, the evaporator module and the coal economizer module respectively comprise a heat exchange pipe group and a shell, and the heat exchange pipe group is horizontally arranged in the shell through pipe plates at two ends of the shell; the heat transfer surface tube bundle of the heat exchange tube group is a heat pipe, and the heat pipe is a light pipe; and a gas pulse soot blower is arranged on the transition flue. The utility model provides an among the prior art titanium white powder calcine rotary kiln flue gas exhaust-heat boiler heat transfer surface tube bank stifled grey problem.
Description
Technical Field
The invention relates to a boiler, in particular to a smoke waste heat boiler of a titanium dioxide calcining rotary kiln.
Background
At present, domestic titanium dioxide production enterprises mainly adopt a sulfuric acid process, the exhaust temperature of titanium dioxide calcining kiln tail gas is distributed at 320-500 ℃, the traditional process is to send the titanium dioxide calcining kiln tail gas into a Venturi washing system for spraying, and the traditional process wastes a large amount of energy and a large amount of water sources.
With the deep popularization of the national policy of energy conservation and emission reduction, titanium dioxide manufacturers can recycle waste heat by installing a waste heat boiler in the tail gas of a titanium dioxide calcining kiln, so that the circular economy is realized. The tail gas of the titanium dioxide calcining kiln contains: water vapor about 70mg/Nm3 ，SO2About 1000mg/Nm3About 2000mg/Nm of sulfuric acid mist3About 1000mg/Nm of dust (titanium dioxide)3。
In the existing exhaust-heat boiler technology: due to SO contained in the tail gas2Sulfuric acid mist and a large amount of water mist cause corrosion and perforation of the tube bundle on the heat transfer surface of the waste heat boiler; titanium white dust contained in the tail gas component is adhered to the surface of the heat transfer surface pipe, so that the heat transfer surface pipe bundle is blocked; affecting the normal operation of the waste heat boiler. Therefore, the development of the waste heat boiler matched with the tail gas characteristic of the titanium dioxide calcining kiln is imperative to the titanium dioxide production industry.
Disclosure of Invention
The utility model aims at providing a titanium white powder calcination rotary kiln flue gas exhaust-heat boiler, titanium white powder calcination rotary kiln flue gas exhaust-heat boiler has solved the stifled grey problem of titanium white powder calcination rotary kiln flue gas exhaust-heat boiler heat transfer surface tube bank among the prior art.
In order to achieve the technical purpose, the utility model adopts the following technical proposal:
the utility model provides a titanium white powder calcination rotary kiln flue gas exhaust-heat boiler, is the horizontal structure setting, includes steam pocket, heat exchange module and transition flue, wherein:
the heat exchange module is composed of a steam superheater module, an evaporator module and an economizer module in sequence, the steam superheater module and the evaporator module and the economizer module are connected through transition flues, a flue gas inlet is formed in the inlet end of the steam superheater module, and a flue gas outlet is formed in the outlet end of the economizer module;
the flue gas inlet is communicated with a flue gas pipeline of the titanium dioxide calcining rotary kiln, and the flue gas outlet is communicated with a Venturi washing process system;
the steam superheater module, the evaporator module and the economizer module respectively comprise a heat exchange tube group and a shell, and the heat exchange tube group is horizontally arranged in the shell through tube plates at two ends of the shell; the heat transfer surface tube bundle of the heat exchange tube group is a heat pipe, and the heat pipe is a light pipe;
and a gas pulse soot blower is arranged on the transition flue.
Further, the heat pipes are arranged in a row or in a staggered manner.
Furthermore, a nano anti-corrosion coating is arranged on the side surface of the flue gas of the heat pipe, and the flue gas side of the heat pipe is made of ND steel.
Further, a steam drum is arranged at the upper part of the heat exchange module; one end of the economizer is communicated with a water supply pipe network, the other end of the economizer is communicated with a steam pocket, the evaporator and the steam pocket form a steam-water natural circulation loop through an eduction pipe and a downcomer, one end of the steam superheater is connected with the steam pocket, and the other end of the steam superheater is connected with the steam pipe network.
Furthermore, ash hoppers are arranged at the bottom ends of the steam superheater module, the evaporator module and the economizer module, and automatic ash discharging devices are arranged at ash discharging openings of the ash hoppers.
According to foretell technical scheme, for prior art, the utility model has the advantages of as follows:
1. the heat transfer surface tube bundle of the heat exchange tube group of the utility model adopts the light tube heat pipe and the gas pulse soot blower is arranged on the transition flue among the heat exchange modules, thereby effectively avoiding the occurrence of the ash blocking condition of the heat transfer surface tube bundle and greatly improving the heat recovery efficiency of the waste heat boiler equipment; the method provides powerful guarantee for stable and efficient operation of the flue gas waste heat boiler of the titanium dioxide calcining rotary kiln.
2. Adopt titanium white powder calcine rotary kiln flue gas exhaust-heat boiler, each heat exchange module manufacture factory equipment dispatches from the factory, has shortened installation site construction cycle greatly, has reduced the equipment fixing expense, has effectively controlled the equipment construction cost.
3. The utility model discloses the heat transfer surface tube bank of heat exchange tube group adopts the fluorescent tube heat pipe, fluorescent tube heat pipe flue gas side material adopts corrosion-resistant ND steel and at heat pipe flue gas side surface spraying nanometer anticorrosive coating, has effectively avoided the flue gas to the emergence of heat pipe corrosion condition, has improved exhaust-heat boiler equipment's life.
Drawings
FIG. 1 is a schematic structural view of a flue gas waste heat boiler of a titanium dioxide calcining rotary kiln of the utility model;
fig. 2 is a schematic structural view (broken and sectioned) of the heat exchange module of the present invention;
in the figure: 1. the system comprises a steam drum, 2, a steam superheater module, 3, an evaporator module, 4, an economizer module, 5, a transition flue, 6, a flue gas inlet, 7, a flue gas outlet, 8, an outlet pipe, 9, a downcomer, 10, a shell, 11, a tube plate, 12, a heat pipe, 13, a gas pulse soot blower, 14, a soot hopper and 15, and an automatic soot discharging device.
Detailed Description
The attached drawings disclose a schematic structural diagram of a preferred embodiment of the invention in a non-limiting way; the technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the flue gas waste heat boiler of the titanium dioxide calcining rotary kiln comprises a steam drum 1, a heat exchange module and a transition flue 5, wherein the heat exchange module is sequentially composed of a steam superheater module 2, an evaporator module 3 and an economizer module 4, the heat exchange modules (2, 3 and 4) are connected through the transition flue 5, a flue gas inlet 6 is arranged at the inlet end of the steam superheater module 2, a flue gas outlet 7 is arranged at the outlet end of the economizer module 4, the flue gas inlet 6 is communicated with a flue gas pipeline of the titanium dioxide calcining rotary kiln, and the flue gas outlet 7 is communicated with a venturi washing process system; the upper parts of the heat exchange modules (2, 3 and 4) are provided with steam drums; one end of the economizer 4 is communicated with a water supply pipe network, the other end of the economizer is communicated with the steam pocket 1, the evaporator 3 and the steam pocket 1 form a steam-water natural circulation loop through an eduction pipe 8 and a downcomer 9, one end of the steam superheater 2 is connected with the steam pocket 1, and the other end of the steam superheater is connected with the steam pipe network.
The steam superheater module 2, the evaporator module 3 and the economizer module 4 comprise a heat exchange tube group and a shell 10, wherein the heat exchange tube group is horizontally arranged in the shell through tube plates 11 at two ends of the shell 10.
The heat transfer surface tube bundle of the heat exchange tube group is a heat pipe 12, and the heat pipe 12 is a light pipe and is arranged in sequence or in staggered arrangement.
The flue gas side surface of the heat pipe 12 is provided with a nano anti-corrosion coating, and the flue gas side surface of the heat pipe 12 is made of ND steel.
And a gas pulse soot blower 13 is arranged on the transition flue 5.
The bottom ends of the steam superheater module 2, the evaporator module 3 and the economizer module 4 are provided with ash hoppers 14, and ash discharge openings of the ash hoppers 14 are provided with automatic ash discharge devices 15.
Flue gas flow: flue gas from the titanium dioxide calcining rotary kiln enters the flue gas waste heat boiler of the titanium dioxide calcining rotary kiln from the flue gas inlet 6, the flue gas sequentially scours the steam superheater module 2, the evaporator module 3 and the economizer module 4 in the waste heat boiler, and after complete sufficient heat exchange, the flue gas is discharged through the flue gas outlet 7 and then returns to the original Venturi washing process system. The dust carried in the flue gas falls into an ash hopper 14 in the process of flowing through each heat transfer surface 2, 3 and 4 and is discharged out of the furnace through an automatic ash discharging device 15.
Steam-water flow: the method comprises the following steps that feedwater from a water supply pipe network is heated by an economizer module 4 and then is sent into a steam pocket 1, a steam-water natural circulation loop is constructed by the evaporator module 3 and the steam pocket 1 through an eduction pipe 8 and a downcomer 9, saturated steam generated in the steam pocket 8 is further heated by a steam superheater 5 to generate superheated steam under rated pressure and temperature, and the superheated steam is merged into a plant area pipe network.
The preferred embodiments of the present invention described above with reference to the drawings are only for illustrating the embodiments of the present invention, and are not to be considered as limiting the objects of the present invention and the contents and scope of the appended claims, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still belong to the technical and claim protection scope of the present invention.
Claims (5)
1. A titanium white powder calcining rotary kiln flue gas waste heat boiler is characterized in that: is horizontal structure setting, including steam pocket, heat exchange module and transition flue, wherein:
the heat exchange module is composed of a steam superheater module, an evaporator module and an economizer module in sequence, the steam superheater module and the evaporator module and the economizer module are connected through transition flues, a flue gas inlet is formed in the inlet end of the steam superheater module, and a flue gas outlet is formed in the outlet end of the economizer module;
the flue gas inlet is communicated with a flue gas pipeline of the titanium dioxide calcining rotary kiln, and the flue gas outlet is communicated with a Venturi washing process system;
the steam superheater module, the evaporator module and the economizer module respectively comprise a heat exchange tube group and a shell, and the heat exchange tube group is horizontally arranged in the shell through tube plates at two ends of the shell; the heat transfer surface tube bundle of the heat exchange tube group is a heat pipe, and the heat pipe is a light pipe;
and a gas pulse soot blower is arranged on the transition flue.
2. The titanium dioxide calcining rotary kiln flue gas waste heat boiler as claimed in claim 1, characterized in that: the heat pipes are arranged in a row or in a staggered manner.
3. The titanium dioxide calcination rotary kiln flue gas waste heat boiler according to claim 1 or 2, characterized in that: the flue gas side surface of the heat pipe is provided with a nano anti-corrosion coating, and the flue gas side of the heat pipe is made of ND steel.
4. The titanium dioxide calcining rotary kiln flue gas waste heat boiler as claimed in claim 1, characterized in that: the upper part of the heat exchange module is provided with a steam pocket; one end of the economizer is communicated with a water supply pipe network, the other end of the economizer is communicated with a steam pocket, the evaporator and the steam pocket form a steam-water natural circulation loop through an eduction pipe and a downcomer, one end of the steam superheater is connected with the steam pocket, and the other end of the steam superheater is connected with the steam pipe network.
5. The titanium dioxide calcining rotary kiln flue gas waste heat boiler as claimed in claim 1, characterized in that: and ash hoppers are arranged at the bottom ends of the steam superheater module, the evaporator module and the economizer module, and automatic ash discharging devices are arranged at ash discharging openings of the ash hoppers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023111581.6U CN214407012U (en) | 2020-12-22 | 2020-12-22 | Titanium white powder calcining rotary kiln flue gas waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023111581.6U CN214407012U (en) | 2020-12-22 | 2020-12-22 | Titanium white powder calcining rotary kiln flue gas waste heat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214407012U true CN214407012U (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023111581.6U Active CN214407012U (en) | 2020-12-22 | 2020-12-22 | Titanium white powder calcining rotary kiln flue gas waste heat boiler |
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| Country | Link |
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| CN (1) | CN214407012U (en) |
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2020
- 2020-12-22 CN CN202023111581.6U patent/CN214407012U/en active Active
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