CN205241537U - System for utilize industry desulfurization by -product gypsum producing building gypsum - Google Patents
System for utilize industry desulfurization by -product gypsum producing building gypsum Download PDFInfo
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- CN205241537U CN205241537U CN201521084809.3U CN201521084809U CN205241537U CN 205241537 U CN205241537 U CN 205241537U CN 201521084809 U CN201521084809 U CN 201521084809U CN 205241537 U CN205241537 U CN 205241537U
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Abstract
The utility model provides a system for utilize industry desulfurization by -product gypsum producing building gypsum, break up into tiny granule through preprocessing device's the machine of breaing up with the stickness gypsum after, increased with hot -blast area of contact, evaporate the free water can realize the short time in the dry -off oven in, then through forging temperature and the dwell time of material in forging burning furnace in the burning furnace, make the dihydrate gypsum powder of desorption free water resolve into the plaster of paris, the plaster of paris of formation gets into product collection device rapidly through the toper air outlet, has prevented effectively that the plaster of paris from further resolving into anhydrite. The building gypsum purity that obtains is high, and is of high quality, moreover from the feed, break up, stoving and the water of crystallization decomposes and the collection of the finished product plaster of paris, whole production process is gone on in succession, whole process can be controlled about 10 seconds, had improved production efficiency greatly, can realize the industrialization processing and the recycle of large industry by -product gypsum.
Description
Technical field
The utility model belongs to gypsum calcining apparatus field, particularly, relates to a kind of system of utilizing industrially desulfurized by-product gypsum to produce plaster of Paris.
Background technology
The every annual emissions of industrial by-products desulfurated plaster that at present domestic all kinds of coal-burning boilers produce because of flue gas desulfurization reaches 6,000 ten thousand and rams the loose soil with a stone-roller after sowing above, and only having an appointment 10% is utilized effectively. The approach effectively utilizing is that thermal dehydration decomposes generation semi-hydrated gypsum, can be used as construction material and uses. Several limited production lines are all to adopt swinging drying kiln to dry and calcine substantially at present. The shortcoming of this technological equipment is that material is stacking states in kiln, little with hot blast contact area, cause moisture evaporation rate slow, the crystallization water decomposes inhomogeneous, partial material excessive decomposition is useless anhydrous gypsum, and part dihydrate gypsum does not also complete the transformation of semi-hydrated gypsum simultaneously. This just makes produced plaster of Paris quality unstable. Hear rate is high simultaneously, and equipment investment is large, has restricted the scale deep processing and utilization of industry by-product gypsum.
Industry by-product gypsum mainly contains the ardealite of desulfurized gesso of flue gas and phosphoric acid processed discharge, and composition and the plaster of paris are similar, are all dihydrate gypsum (CaSO4·2H2O),, under uniform temperature condition, the crystallization water decomposes generation semi-hydrated gypsum (plaster of Paris, the CaSO of use value4·0.5H2O),, when temperature continues to raise, semi-hydrated gypsum can continue to decompose generation anhydrous gypsum CaSO4. How the subject matter that industrial production will solve improves the resolution ratio of dihydrate gypsum, reduces as far as possible and produces anhydrous gypsum simultaneously. Key issue is gypsum height of flue-gas temperature in the time of staying and system in system. The every annual emissions of industrial by-products desulfurated plaster that at present domestic all kinds of coal-burning boilers produce because of flue gas desulfurization reaches 6,000 ten thousand and rams the loose soil with a stone-roller after sowing above, and only having an appointment 10% is utilized effectively. The approach effectively utilizing is that thermal dehydration decomposes generation semi-hydrated gypsum, can be used as construction material and uses. Several limited production lines are all to adopt swinging drying kiln to dry and calcine substantially at present. The shortcoming of this technological equipment is that material is stacking states in kiln, little with hot blast contact area, cause moisture evaporation rate slow, the crystallization water decomposes inhomogeneous, partial material excessive decomposition is useless anhydrous gypsum, and part dihydrate gypsum does not also complete the transformation of semi-hydrated gypsum simultaneously. This just makes produced plaster of Paris quality unstable. Hear rate is high simultaneously, and equipment investment is large, has restricted the scale deep processing and utilization of industry by-product gypsum.
Industry by-product gypsum mainly contains the ardealite of desulfurized gesso of flue gas and phosphoric acid processed discharge, and composition and the plaster of paris are similar, are all dihydrate gypsum (CaSO4·2H2O),, under uniform temperature condition, the crystallization water decomposes generation semi-hydrated gypsum (plaster of Paris, the CaSO of use value4·0.5H2O),, when temperature continues to raise, semi-hydrated gypsum can continue to decompose generation anhydrous gypsum CaSO4. How the subject matter that industrial production will solve improves the resolution ratio of dihydrate gypsum, reduces as far as possible and produces anhydrous gypsum simultaneously. Key issue is gypsum height of flue-gas temperature in the time of staying and system in system.
Utility model content
The utility model is in order to solve the above-mentioned defect and the deficiency that exist in prior art, a kind of system of utilizing industrially desulfurized by-product gypsum to produce plaster of Paris is provided, can and be decomposed into semi-hydrated gypsum by industrially desulfurized by-product gypsum flash baking, it is plaster of Paris, the product purity that obtains is high, quality good, and production efficiency is high.
For solving the problems of the technologies described above, the utility model provides a kind of system of utilizing industrially desulfurized by-product gypsum to produce plaster of Paris, comprises pretreatment unit, drying oven, calcining furnace, product collecting device and air exhausting device;
Described pretreatment unit comprises hot-blast stove and beater, described hot-blast stove is provided with hot-blast stove wind pipe, described hot-blast stove wind pipe is connected with described drying oven, between described hot-blast stove wind pipe and described drying oven, is provided with charging aperture, and described beater is placed in charging aperture place; Described drying oven is vertically placed, be placed in described calcining furnace under; The junction of described calcining furnace and described drying oven is provided with concurrent heating airduct, and described concurrent heating airduct one end is communicated with described calcining furnace, and the other end is communicated with described hot-blast stove wind pipe, and described concurrent heating airduct is provided with cold blast sliding valve; Described calcining furnace comprises urceolus and inner core, described urceolus is taper, described inner core comprises fixing inner core and movable inner core, described fixing inner core is fixed on the top of described outer tube inner wall, the both sides inwall of described fixing inner core is provided with chute, and described movable inner core is movably arranged on described chute, between described movable inner core and described chute, is provided with locating piece, the top of described movable inner core is provided with screw rod, and screw rod is fixed on the platform on calcining furnace by nut; The air outlet of described calcining furnace is connected with described product collecting device by air-out bend pipe, and described air-out bend pipe is provided with temperature transducer, and described product collecting device is connected with described air exhausting device.
Further, described fixing inner core is fixed on described outer tube inner wall by support.
Further, described urceolus top is provided with integrated taper air outlet, and described taper air outlet is connected with described air-out bend pipe.
Further, the end that described concurrent heating airduct is communicated with described calcining furnace is annular, and annular is set in the periphery of described calcining furnace, and annular inboard is provided with several holes, and hole is provided with arm, and arm is communicated with described calcining furnace.
Further, described product collecting device comprises cyclone collector and cloth bag collector, the air inlet of described cyclone collector is connected with described air-out bend pipe, the air outlet of described cyclone collector is connected with the air inlet of described cloth bag collector, and the air outlet of described cloth bag collector is connected with air exhausting device.
Further, described air exhausting device comprises centrifugal fan and chimney, and the air inlet of described centrifugal fan is connected with the air outlet of described cloth bag collector, and the air outlet of described centrifugal fan is connected with the air inlet of chimney.
Further, described system also comprises waste heat pipeline, and one end of described waste heat pipeline is connected with chimney, and the other end of described waste heat pipeline is connected with hot-blast stove wind pipe, and described waste heat pipeline is provided with waste heat volume control damper.
The useful technique effect that the utility model reaches: the utility model is dispersed as stickiness gypsum after fine particle by the beater of pretreatment unit, has increased and the contact area of hot blast, in drying oven, can realize in the short time free water is evaporated; Then by temperature and the time of staying of material in calcining furnace in calcining furnace, make the dihydrate gypsum powder that removes free water resolve into semi-hydrated gypsum, the semi-hydrated gypsum generating enters rapidly product collecting device by taper air outlet, has effectively prevented that semi-hydrated gypsum from further resolving into anhydrous gypsum. The plaster of Paris purity of producing by the industrially desulfurized by-product gypsum of utility model processing is high, quality is good, and from feeding, break up, oven dry and the crystallization water decompose and the collection of finished product semi-hydrated gypsum, whole production process is carried out continuously, whole process can be controlled at about 10 seconds, greatly improve production efficiency, can realize the industrialization processing of large industry by-product gypsum and process and recycle.
Brief description of the drawings
The system architecture schematic diagram of Fig. 1 the utility model.
The calcining furnace structural representation of Fig. 2 the utility model.
The specific embodiment material pneumatic cross-sectional area of Fig. 3 the utility model structural representation hour.
Structural representation when the specific embodiment material pneumatic cross-sectional area of Fig. 4 the utility model is maximum.
Wherein: 1 hot-blast stove; 2 hot-blast stove wind pipes; 3 cold blast sliding valves; 4 beaters; 5 charging apertures; 6 concurrent heating airducts; 7 calcining furnaces; 8 cyclone collector air valve doors; 9 temperature transducers; 10 air-out bend pipes; 11 cyclone collectors; 12 cloth bag collectors; 13 centrifugal fans; 14 chimneys; 15 conveying worms; 16 cloth bag collector air valve doors; 17 waste heat pipelines; 18 finished product conveying equipments; 19 waste heat volume control damper doors; 20 nuts; 21 platforms; 22 supports; 23 fixing inner cores; 24 screw rods; 25 locating pieces; 26 movable inner cores; 27 drying ovens.
Detailed description of the invention
For the technique effect that can better understand technical characterictic of the present utility model, technology contents and reach, now accompanying drawing of the present utility model is described in detail in conjunction with the embodiments.
Below in conjunction with drawings and Examples, the utility model patent is further illustrated.
As shown in Figure 1-2, the utility model provides a kind of system of utilizing industrially desulfurized by-product gypsum to produce plaster of Paris, comprises pretreatment unit, drying oven 27, calcining furnace 7, product collecting device and air exhausting device;
Described pretreatment unit comprises hot-blast stove 1 and beater 4, described hot-blast stove 1 is provided with hot-blast stove wind pipe 2, described hot-blast stove wind pipe 2 is connected with described drying oven 27, between described hot-blast stove wind pipe 2 and described drying oven 27, be provided with charging aperture 5, described beater 4 is placed in charging aperture 5 places;
Described drying oven 27 is vertical suspending following current drying oven, vertically place, be placed in described calcining furnace 7 under, material is suspended state in drying oven 27, has greatly improved the contact area of hot blast and material, has shortened the evaporation time of free water;
The junction of described calcining furnace 7 and described drying oven 27 is provided with concurrent heating airduct 6, and described concurrent heating airduct 6 one end are communicated with described calcining furnace 7, and the other end is communicated with described hot-blast stove wind pipe 2, and described concurrent heating airduct 6 is provided with cold blast sliding valve 3; Can regulate the calcining heat in calcining furnace 7 by the cold blast sliding valve 3 on concurrent heating airduct 6. The end that described concurrent heating airduct 6 is communicated with described calcining furnace 5 is annular, and annular is set in the periphery of described calcining furnace 7, and annular inboard is provided with several holes, and hole is provided with arm, and arm is communicated with described calcining furnace 7.
Described calcining furnace 7 comprises urceolus and inner core, described urceolus is taper, described urceolus top is provided with integrated taper air outlet, described taper air outlet is connected with described air-out bend pipe 10, in the time that dihydrate gypsum resolves into semi-hydrated gypsum, semi-hydrated gypsum is during by taper air outlet, because the cross-sectional area of taper air outlet shrinks, air velocity sharply rises, make semi-hydrated gypsum enter fast follow-up product collecting device, effectively stop the crystallization water in semi-hydrated gypsum further to decompose, avoided the generation of anhydrous gypsum.
Described inner core comprises fixing inner core 23 and movable inner core 26, and described fixing inner core 23 is fixed on described outer tube inner wall top by support 22. The both sides inwall of described fixing inner core 23 is provided with chute, described movable inner core 26 is movably arranged on described chute, between described movable inner core 26 and described chute, be provided with locating piece 25, for fixing movable inner core 26, the top of described movable inner core 26 is provided with screw rod 24; Screw rod 24 is fixed on the platform on calcining furnace by nut 20, by rotary screw 24, drive activity inner core 26 moves up and down along the chute on fixing inner core 23 inwalls, thereby the cross-sectional area while changing material flow by taper urceolus, the flow velocity of the larger material of cross-sectional area is larger, the time of staying in calcining furnace 7 is shorter, otherwise the time of staying is longer.
The air outlet of described calcining furnace 7 is connected with described product collecting device by air-out bend pipe 10, and described air-out bend pipe 10 is provided with temperature transducer 9, and described product collecting device is connected with described air exhausting device. Described product collecting device comprises cyclone collector 11 and cloth bag collector 12, the air inlet of described cyclone collector 11 is connected with described air-out bend pipe 10, the air outlet of described cyclone collector 11 is connected with the air inlet of described cloth bag collector 12, and the air outlet of described cloth bag collector 12 is connected with air exhausting device.
Described air exhausting device comprises centrifugal fan 13 and chimney 14, and the air inlet of described centrifugal fan 13 is connected with the air outlet of described cloth bag collector 12, and the air outlet of described centrifugal fan 13 is connected with the air inlet of chimney 14. Enter cyclone collector 11 from product major part out in calcining furnace, some more tiny products, along with air-flow enters cloth bag collector 12, are attached on the screen pack in cloth bag collector 12, then deliver to finished product conveying equipment 18 by conveying worm 15.
Described system also comprises waste heat pipeline 17, and one end of described waste heat pipeline 17 is connected with chimney 14, and the other end of described waste heat pipeline 17 is connected with hot-blast stove wind pipe 2, and described waste heat pipeline 17 is provided with waste heat volume control damper 19. In system, hot blast enters pretreatment unit by waste heat pipeline 17, has realized the recycling of waste heat.
Utilize industrially desulfurized by-product gypsum to produce a method for plaster of Paris, comprise the following steps:
Step 1, pretreatment; Industrially desulfurized by-product gypsum is entered to system from charging aperture, and gypsum forms particle under the effect of beater, suspends and enters drying oven, simultaneously hot-blast stove heat air delivery;
Step 2, processed; The graininess gypsum that step 1 obtains fully contacts with the hot blast of hot-blast stove in drying oven, and free water is evaporated, and the land plaster that has removed free water enters calcining furnace with air-flow;
Step 3, calcination processing; Regulate temperature and residence time of material in calcining furnace, the land plaster that enters calcining furnace is decomposed and generates building gypsum plaster;
In calcining furnace, thermoregulator detailed process is, the temperature transducer being arranged on air-out bend pipe detects the temperature in calcining furnace, open the cold blast sliding valve being arranged on concurrent heating airduct cold air is delivered into calcining furnace, reduce the temperature in calcining furnace, close cold blast sliding valve, only have the hot blast in hot-blast stove to be delivered into calcining furnace, improve the temperature in calcining furnace.
The detailed process that in calcining furnace, residence time of material regulates is, rotary screw, drive activity inner core moves up and down along the chute on fixing inner core inwall, thereby the cross-sectional area while changing material flow by taper urceolus, the flow velocity of the larger material of cross-sectional area is larger, the time of staying in calcining furnace is shorter, otherwise the time of staying is longer.
Step 4, product-collecting; The building gypsum plaster generating enters product collecting device by the taper air outlet of urceolus;
Step 5, the air-flow in system is discharged by chimney through centrifugal fan.
Specific embodiment
For the adjustment process of residence time of material in the utility model calcining furnace is described, now describe by specific embodiment: movable inner core slides into when minimum along the chute on fixing inner core inwall in calcining furnace, air-flow is that diameter is the circular cylinder body of d by the region of calcining furnace, as shown in Figure 3, now, the cross-sectional area minimum that hot blast passes through, flow velocity maximum, air-flow drives material to pass through fast calcining furnace, thereby the time of staying of material in calcining furnace is the shortest, therefore, part dihydrate gypsum can not fully contact with thermal current, resolves into semi-hydrated gypsum incomplete. Counter-rotating screw rod, movable inner core moves up along the chute on fixing inner core inwall. At the highest point of chute, same hot-air flow has just become by the region of device the circular cylinder body that diameter is D, as shown in Figure 4. The cross-sectional area maximum that now hot-air flow passes through, air velocity is minimum, and the time of staying of material in calcining furnace is the longest, will exist so the part semi-hydrated gypsum crystallization water to continue to resolve into anhydrous gypsum. Now rotary screw forward, movable inner core is moved downward to correct position along the chute on fixing inner core inwall. Therefore can, by the content of dihydrate gypsum in plaster of Paris or anhydrous gypsum, adjust the position of movable inner core, further control the time of staying of material in calcining furnace. Wherein, forward with as shown by the arrows in Figure 2 reverse.
The system and method that adopts the utility model to provide, the purity of the plaster of Paris of production reaches more than 99%, the purity of the plaster of Paris of producing considerably beyond present horizontal revolving calcining kiln.
Below announced the utility model with preferred embodiment, so it is not in order to limit the utility model, and all technical schemes of taking the scheme that is equal to replacement or equivalent transformation to obtain, all drop in protection domain of the present utility model.
Claims (7)
1. utilize industrially desulfurized by-product gypsum to produce a system for plaster of Paris, it is characterized in that: comprise pretreatment unit, drying oven, calcining furnace, product collecting device and air exhausting device;
Described pretreatment unit comprises hot-blast stove and beater, described hot-blast stove is provided with hot-blast stove wind pipe, described hot-blast stove wind pipe is connected with described drying oven, between described hot-blast stove wind pipe and described drying oven, is provided with charging aperture, and described beater is placed in charging aperture place; Described drying oven is vertically placed, be placed in described calcining furnace under; The junction of described calcining furnace and described drying oven is provided with concurrent heating airduct, and described concurrent heating airduct one end is communicated with described calcining furnace, and the other end is communicated with described hot-blast stove wind pipe, and described concurrent heating airduct is provided with cold blast sliding valve; Described calcining furnace comprises urceolus and inner core, described urceolus is taper, described inner core comprises fixing inner core and movable inner core, described fixing inner core is fixed on the top of described outer tube inner wall, the both sides inwall of described fixing inner core is provided with chute, and described movable inner core is movably arranged on described chute, between described movable inner core and described chute, is provided with locating piece, the top of described movable inner core is provided with screw rod, and screw rod is fixed on the platform on calcining furnace by nut; The air outlet of described calcining furnace is connected with described product collecting device by air-out bend pipe, and described air-out bend pipe is provided with temperature transducer, and described product collecting device is connected with described air exhausting device.
2. the system of utilizing industrially desulfurized by-product gypsum to produce plaster of Paris according to claim 1, is characterized in that: described fixing inner core is fixed on described outer tube inner wall by support.
3. the system of utilizing industrially desulfurized by-product gypsum to produce plaster of Paris according to claim 1, is characterized in that: described urceolus top is provided with integrated taper air outlet, and described taper air outlet is connected with described air-out bend pipe.
4. the system of utilizing industrially desulfurized by-product gypsum to produce plaster of Paris according to claim 1, it is characterized in that: the end that described concurrent heating airduct is communicated with described calcining furnace is annular, annular is set in the periphery of described calcining furnace, annular inboard is provided with several holes, hole is provided with arm, and arm is communicated with described calcining furnace.
5. the system of utilizing industrially desulfurized by-product gypsum to produce plaster of Paris according to claim 1, it is characterized in that: described product collecting device comprises cyclone collector and cloth bag collector, the air inlet of described cyclone collector is connected with described air-out bend pipe, the air outlet of described cyclone collector is connected with the air inlet of described cloth bag collector, and the air outlet of described cloth bag collector is connected with air exhausting device.
6. the system of utilizing industrially desulfurized by-product gypsum to produce plaster of Paris according to claim 5, it is characterized in that: described air exhausting device comprises centrifugal fan and chimney, the air inlet of described centrifugal fan is connected with the air outlet of described cloth bag collector, and the air outlet of described centrifugal fan is connected with the air inlet of chimney.
7. the system of utilizing industrially desulfurized by-product gypsum to produce plaster of Paris according to claim 1, it is characterized in that: described system also comprises waste heat pipeline, one end of described waste heat pipeline is connected with chimney, the other end of described waste heat pipeline is connected with hot-blast stove wind pipe, and described waste heat pipeline is provided with waste heat volume control damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521084809.3U CN205241537U (en) | 2015-12-23 | 2015-12-23 | System for utilize industry desulfurization by -product gypsum producing building gypsum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521084809.3U CN205241537U (en) | 2015-12-23 | 2015-12-23 | System for utilize industry desulfurization by -product gypsum producing building gypsum |
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| Publication Number | Publication Date |
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| CN205241537U true CN205241537U (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521084809.3U Withdrawn - After Issue CN205241537U (en) | 2015-12-23 | 2015-12-23 | System for utilize industry desulfurization by -product gypsum producing building gypsum |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481275A (en) * | 2015-12-23 | 2016-04-13 | 盐城市富仕环保科技有限公司 | System and method for producing building gypsum by using industrial desulfation by-product gypsum |
| CN110436875A (en) * | 2019-09-16 | 2019-11-12 | 王安全 | A kind of plastering gupsum and its preparation system |
| CN111548036A (en) * | 2020-05-18 | 2020-08-18 | 郑州三迪建筑科技有限公司 | Method for utilizing waste heat generated by calcining phosphogypsum |
-
2015
- 2015-12-23 CN CN201521084809.3U patent/CN205241537U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481275A (en) * | 2015-12-23 | 2016-04-13 | 盐城市富仕环保科技有限公司 | System and method for producing building gypsum by using industrial desulfation by-product gypsum |
| CN110436875A (en) * | 2019-09-16 | 2019-11-12 | 王安全 | A kind of plastering gupsum and its preparation system |
| CN110436875B (en) * | 2019-09-16 | 2022-03-15 | 王安全 | Plaster and preparation system thereof |
| CN111548036A (en) * | 2020-05-18 | 2020-08-18 | 郑州三迪建筑科技有限公司 | Method for utilizing waste heat generated by calcining phosphogypsum |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160518 Effective date of abandoning: 20161109 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |