CN110314921B - Coarse slag closed centrifugal separation device and method - Google Patents
Coarse slag closed centrifugal separation device and method Download PDFInfo
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- CN110314921B CN110314921B CN201910609876.9A CN201910609876A CN110314921B CN 110314921 B CN110314921 B CN 110314921B CN 201910609876 A CN201910609876 A CN 201910609876A CN 110314921 B CN110314921 B CN 110314921B
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- coarse slag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
Abstract
The invention discloses a coarse slag closed centrifugal separation device and a method, wherein ash water from the bottom of a lock hopper is firstly sent into a coarse slag cooling homogenizer to be subjected to liquid-solid phase preliminary homogenization and cooling treatment, so that the temperature of the ash water is reduced to 40-45 ℃, then is treated by a solid-liquid redistributor, and then is sent into a coarse slag separator to be subjected to separation treatment, so that coarse slag and ash water are obtained; the coarse slag is conveyed into a transport vehicle through a closed conveying belt; the grey water is fed into a grey water tank. The invention can realize effective separation of coarse slag, and the whole system meets the requirements of energy conservation, environmental protection and safety.
Description
Technical Field
The invention relates to the technical field of coarse slag separation of a gasification furnace, in particular to a coarse slag closed centrifugal separation device and a coarse slag closed centrifugal separation method.
Background
Coal gasification refers to the process of reacting coal with oxygen and steam at a certain temperature and pressure to produce raw coal gas. The raw gas needs to be washed by water, and then sent to the next working section after dust carried by the raw gas is removed.
Coarse slag and other solid particles deposited at the bottom of the chilling chamber of the gasification furnace, and large slag blocks are crushed by a slag crusher. The coarse slag is brought into the lock hopper through the circulation effect of the circulating water flow, and most of the coarse slag is settled at the bottom of the lock hopper. The lock hopper system regularly and automatically discharges coarse slag water into the slag pool, the slag conveyor sends coarse slag out of the slag pool, and the coarse slag is discharged to the outside after partial moisture is removed by the coarse slag vibrating screen.
In the prior art, a slag conveyor and a vibrating screen are generally adopted for coarse slag separation of a gasification furnace, and the coarse slag separation process at least has the following problems:
(1) the occupied area of the equipment is large;
(2) serious leakage, high maintenance frequency, high maintenance labor intensity and high maintenance cost;
(3) the water consumption is high;
(4) the whole factory building is flooded with sewage and steam through open operation, and particularly in winter, the factory building is seriously frozen, inconvenient to operate and has potential safety hazards;
(5) the water content of the coarse slag is high, and the requirements of secondary transportation, stacking and seepage and environmental protection cannot be met;
disclosure of Invention
Aiming at the defects in the prior art, the invention provides the coarse slag closed centrifugal separation device and the coarse slag closed centrifugal separation method, which can realize effective separation of coarse slag and ensure that the whole system meets the requirements of energy conservation, environmental protection and safety.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a sealed centrifugal separation device of coarse slag, with lock fill bottom intercommunication, includes: a coarse slag cooling homogenizer, a solid-liquid redistributor, a coarse slag separator, a closed conveying belt and a lime water tank; the feed inlet of the coarse slag cooling homogenizer is communicated with the bottom of the lock hopper, the discharge outlet of the coarse slag cooling homogenizer is communicated with the feed inlet of the solid-liquid redistributor, the discharge outlet of the solid-liquid redistributor is communicated with the feed inlet of the coarse slag separator, the first discharge outlet of the coarse slag separator is communicated with the inlet of the closed conveying belt, and the second discharge outlet of the coarse slag separator is communicated with the grey water tank.
Preferably, the second discharge port of the coarse slag separator is communicated with the inlet of the grey water cooler, and the outlet of the grey water cooler is communicated with the feed port of the coarse slag cooling homogenizer.
Preferably, the whole coarse slag closed centrifugal separation device is of a closed structure.
Preferably, the coarse residue separator is a spiral scraper centrifugal separator.
A method for closed centrifugal separation of coarse slag comprises the following steps: the coarse slag closed centrifugal separation device is adopted; conveying ash water from the bottom of the lock hopper into a coarse slag cooling homogenizer for liquid-solid phase preliminary homogenization and cooling treatment, so that the temperature of the ash water is reduced to 40-45 ℃, treating the ash water through a solid-liquid redistributor, and conveying the ash water into a coarse slag separator for separation treatment, thereby obtaining coarse slag and ash water; the coarse slag is conveyed into a transport vehicle through a closed conveying belt; the grey water is fed into a grey water tank.
Preferably, the grey water is sent to a grey water cooler for cooling and then returned to the coarse slag cooling homogenizer for recycling.
Preferably, the process is carried out in a closed environment throughout.
According to the technical scheme provided by the invention, the coarse slag closed centrifugal separation method provided by the invention is a separation process which is carried out in a closed environment in the whole process, the temperature of the ash slag water is reduced to 40-45 ℃ while the liquid-solid phase primary homogenization treatment is carried out, and then the coarse slag separation is carried out, so that the effective separation of the coarse slag is realized, and the whole system meets the requirements of energy conservation, environmental protection and safety.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a coarse slag closed centrifugal separation device provided by the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The following describes the coarse slag closed centrifugal separation device and method provided by the invention in detail. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
As shown in fig. 1, a closed centrifugal separation device for coarse slag may include: a coarse slag cooling homogenizer 1, a solid-liquid redistributor 2, a coarse slag separator 3, a closed conveying belt 4 and an ash water tank 7; the feed inlet of the coarse slag cooling homogenizer 1 is communicated with the bottom of the lock hopper, the discharge outlet of the coarse slag cooling homogenizer 1 is communicated with the feed inlet of the solid-liquid redistributor 2, the discharge outlet of the solid-liquid redistributor 2 is communicated with the feed inlet of the coarse slag separator 3, the first discharge outlet of the coarse slag separator 3 is communicated with the inlet of the closed conveyor belt 4, and the second discharge outlet of the coarse slag separator 3 is communicated with the grey water tank 7. The second discharge hole of the coarse slag separator 3 is communicated with the inlet of the grey water cooler 6, and the outlet of the grey water cooler 6 is communicated with the feed hole of the coarse slag cooling homogenizer 1. The whole coarse slag closed centrifugal separation device is of a closed structure.
Specifically, the coarse slag closed centrifugal separation method may include: sending ash water from the bottom of the lock hopper into a coarse slag cooling homogenizer 1 for liquid-solid phase preliminary homogenization and cooling treatment, so that the temperature of the ash water is reduced to 40-45 ℃, then treating the ash water through a solid-liquid redistributor 2 so that the ash water meets the feeding requirement of a coarse slag separator 3, and then sending the ash water into the coarse slag separator 3 for separation treatment, thereby obtaining coarse slag and ash water; the coarse slag is conveyed into a transport vehicle 5 through a closed conveying belt 4; the grey water can be sent into a grey water tank 7 to return to a grey water system, or can be sent into a grey water cooler 6 to be cooled and then returned to the coarse slag cooling homogenizer 1 to be recycled.
Further, the coarse slag closed centrifugal separation method can comprise the following embodiments:
(1) the whole course of the coarse slag closed centrifugal separation method is carried out in a closed environment.
(2) The temperature of the inlet of the coarse slag cooling homogenizer 1 is less than or equal to 75 ℃, and the pressure is 0.4 MPaG.
(3) The coarse residue separator 3 is a spiral scraper centrifugal separator, the working temperature is 40-45 ℃, and the working pressure is 0.4-0.6 MPaG.
(4) The temperature of the grey water tank 7 was 40 ℃ and the pressure was 0 MPaG.
Compared with the prior art, the coarse slag closed centrifugal separation method provided by the invention at least has the following advantages:
(1) the invention has small occupied area of equipment, the occupied area of the whole system is not more than 1/2 of the original system, and no large equipment foundation is provided, thereby reducing the civil engineering investment.
(2) The invention can realize remote automatic control, has stable operation, small workload and less operators.
(3) The invention can continuously operate without maintenance in the operation period, and reduces the maintenance cost compared with the prior art.
(4) The water content of the coarse slag is lower than that of the prior art, the water consumption is reduced, the water content of the coarse slag is low, and the water recovery rate is increased.
(5) The invention is a closed system, changes the open type operation environment of the prior art, and achieves comfort, environmental protection and safety.
(6) The coarse slag closed centrifugal separation method provided by the invention has the advantages that the coarse slag is subjected to closed centrifugal separation and deslagging, and the water content of the coarse slag is stably controlled to be 10-35%.
In conclusion, the embodiment of the invention can realize effective separation of coarse slag, and the whole system meets the requirements of energy conservation, environmental protection and safety.
In order to more clearly show the technical scheme and the technical effects provided by the present invention, the coarse slag closed centrifugal separation device and the method provided by the embodiment of the present invention are described in detail with specific embodiments below.
Example 1
As shown in fig. 1, a coarse slag closed centrifugal separation device, the separation method comprises:
taking the purification of the coarse slag of 63t/h as an example, the ash water from the bottom of the lock hopper is automatically sent into a coarse slag cooling homogenizer 1 at a fixed time at a temperature of 75 ℃ for preliminary homogenization and cooling of liquid-solid phase, the temperature of the ash water is reduced to 40-45 ℃, then the ash water is treated by a solid-liquid redistributor 2, the ash water meets the feeding requirement of a coarse slag separator 3, and then the ash water is sent into the coarse slag separator 3 for separation treatment, so that the coarse slag and the ash water are obtained; the coarse slag discharged by the coarse slag separator 3 is 12t/h, the water content is 10 percent, and the grey water after deslagging is 51 t/h. The coarse slag is conveyed into a transport vehicle 5 through a closed conveyor belt 4 and transported to the outside; the grey water can be sent into a grey water tank 7 to return to a grey water system, or can be sent into a grey water cooler 6 to be cooled and then returned to the coarse slag cooling homogenizer 1 to be recycled.
In conclusion, the embodiment of the invention can realize effective separation of coarse slag, and the whole system meets the requirements of energy conservation, environmental protection and safety.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. A coarse slag closed centrifugal separation method is characterized by comprising the following steps: the following coarse slag closed centrifugal separation device is adopted; this airtight centrifugal separation device of coarse slag with lock fill bottom intercommunication includes: the system comprises a coarse slag cooling homogenizer (1), a solid-liquid redistributor (2), a coarse slag separator (3), a closed conveying belt (4) and a lime water tank (7); the feeding hole of the coarse slag cooling homogenizer (1) is communicated with the bottom of the lock hopper, the discharging hole of the coarse slag cooling homogenizer (1) is communicated with the feeding hole of the solid-liquid redistributor (2), the discharging hole of the solid-liquid redistributor (2) is communicated with the feeding hole of the coarse slag separator (3), the first discharging hole of the coarse slag separator (3) is communicated with the inlet of the closed conveying belt (4), and the second discharging hole of the coarse slag separator (3) is communicated with the ash water tank (7); the whole coarse slag closed centrifugal separation device is of a closed structure; the coarse residue separator (3) is a spiral scraper centrifugal separator;
conveying ash water from the bottom of the lock hopper into a coarse slag cooling homogenizer (1) for liquid-solid phase primary homogenization and cooling treatment, cooling the ash water to 40-45 ℃, treating the ash water through a solid-liquid redistributor (2) to enable the ash water to meet the feeding requirement of a coarse slag separator (3), and then conveying the ash water into the coarse slag separator (3) for separation treatment to obtain coarse slag and ash water; the coarse slag is conveyed into a transport vehicle (5) through a closed conveying belt (4); the grey water is fed into a grey water tank (7).
2. The coarse slag closed centrifugal separation method according to claim 1, wherein a second discharge port of the coarse slag separator (3) is communicated with an inlet of a grey water cooler (6), and an outlet of the grey water cooler (6) is communicated with a feed port of the coarse slag cooling homogenizer (1); and the grey water is also sent into a grey water cooler (6) for cooling and then returned to the coarse slag cooling homogenizer (1) for recycling.
3. The closed centrifugal separation method for coarse slag according to claim 1 or 2, wherein the whole process is carried out in a closed environment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910609876.9A CN110314921B (en) | 2019-07-08 | 2019-07-08 | Coarse slag closed centrifugal separation device and method |
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| CN201910609876.9A CN110314921B (en) | 2019-07-08 | 2019-07-08 | Coarse slag closed centrifugal separation device and method |
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| CN110314921A CN110314921A (en) | 2019-10-11 |
| CN110314921B true CN110314921B (en) | 2022-03-22 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967401A (en) * | 2010-11-01 | 2011-02-09 | 广州迪森热能技术股份有限公司 | Closed slag-discharging device for biomass gasifier and biomass gasification reaction system |
| WO2011018977A1 (en) * | 2009-08-11 | 2011-02-17 | 太平洋セメント株式会社 | Organic sludge drying system and drying method |
| CN103528055A (en) * | 2013-10-25 | 2014-01-22 | 湖北华庆石化设备有限公司 | Pressurized ash residue treatment technology and system |
| CN203794843U (en) * | 2014-02-24 | 2014-08-27 | 武汉凯迪工程技术研究总院有限公司 | Biomass fuel gasification ash/slag water-cooling spiral removal device |
| CN207537406U (en) * | 2017-09-21 | 2018-06-26 | 新奥科技发展有限公司 | A kind of gasification furnace slag discharge and catalyst recovery system |
| CN208574338U (en) * | 2018-05-02 | 2019-03-05 | 新疆天智辰业化工有限公司 | The device that the thick slag dehydration of coal gasification recycles |
-
2019
- 2019-07-08 CN CN201910609876.9A patent/CN110314921B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011018977A1 (en) * | 2009-08-11 | 2011-02-17 | 太平洋セメント株式会社 | Organic sludge drying system and drying method |
| CN101967401A (en) * | 2010-11-01 | 2011-02-09 | 广州迪森热能技术股份有限公司 | Closed slag-discharging device for biomass gasifier and biomass gasification reaction system |
| CN103528055A (en) * | 2013-10-25 | 2014-01-22 | 湖北华庆石化设备有限公司 | Pressurized ash residue treatment technology and system |
| CN203794843U (en) * | 2014-02-24 | 2014-08-27 | 武汉凯迪工程技术研究总院有限公司 | Biomass fuel gasification ash/slag water-cooling spiral removal device |
| CN207537406U (en) * | 2017-09-21 | 2018-06-26 | 新奥科技发展有限公司 | A kind of gasification furnace slag discharge and catalyst recovery system |
| CN208574338U (en) * | 2018-05-02 | 2019-03-05 | 新疆天智辰业化工有限公司 | The device that the thick slag dehydration of coal gasification recycles |
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| CN110314921A (en) | 2019-10-11 |
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