阅读说明：本技术 一种模块化高温物料消化系统 (Modular high-temperature material digestion system ) 是由 胡泽武 胡其军 代建新 于 2020-10-27 设计创作，主要内容包括：本发明提供一种模块化高温物料消化系统,包括原料仓(1)、闸板阀(2)、双管螺旋秤(3)、消化器(4)、收尘器输送铰刀(5)、横向输送铰刀(6)、高密封回转下料器(7)、喷水系统(8)、消化收尘系统(9),原料仓(1)放置于结构框架(10)上,原料仓(1)下部为双曲线锥体(103),双曲线锥体(103)通过闸板阀(2)连接双管螺旋秤(3),双管螺旋秤(3)连接消化器(4),消化器(4)通过收尘器输送铰刀(5)连接横向输送铰刀(6),横向输送铰刀(6)连通高密封回转下料器(7)。本发明操作控制简单,不会对窑烧成产生任何负面影响,是水泥行业干法烟气脱硫中实现绿色循环经济、控制生产成本最有效的手段。(The invention provides a modularized high-temperature material digestion system which comprises a raw material bin (1), a gate valve (2), a double-tube spiral scale (3), a digester (4), a dust collector conveying reamer (5), a transverse conveying reamer (6), a high-sealing rotary feeder (7), a water spraying system (8) and a digestion dust collecting system (9), wherein the raw material bin (1) is placed on a structural frame (10), the lower part of the raw material bin (1) is a hyperbolic cone (103), the hyperbolic cone (103) is connected with the double-tube spiral scale (3) through the gate valve (2), the double-tube spiral scale (3) is connected with the digester (4), the digester (4) is connected with the transverse conveying reamer (6) through the dust collector conveying reamer (5), and the transverse conveying reamer (6) is communicated with the high-sealing rotary feeder (7). The method is simple to operate and control, does not generate any negative influence on kiln firing, and is the most effective means for realizing green circular economy and controlling production cost in dry flue gas desulfurization in the cement industry.)

1. A modularized high-temperature material digestion system comprises a raw material bin (1), a gate valve (2), a double-tube spiral scale (3), a digester (4), a dust collector conveying reamer (5), a transverse conveying reamer (6), a high-sealing rotary feeder (7), a water spraying system (8), a digestion dust collecting system (9) and a structural frame (10), and is characterized in that the raw material bin (1) is placed on the structural frame (10), the lower part of the raw material bin (1) is a hyperbolic cone (103), the hyperbolic cone (103) is connected with the double-tube spiral scale (3) through the gate valve (2), the double-tube spiral scale (3) is connected with the digester (4), the digester (4) is connected with the transverse conveying reamer (6) through the dust collector conveying reamer (5), the transverse conveying reamer (6) is communicated with the high-sealing rotary feeder (7), wherein the digester (4) is connected with the water spraying system (8), and is communicated with a digestion and dust collection system (9).

2. The modular high-temperature material digestion system according to claim 1, characterized in that the base at the lower end of the raw material bin (1) is connected with 3 weighing modules (101) uniformly arranged in the circumferential direction through bolts, the other ends of the weighing modules (101) are fixed on the structural frame (10) through bolts, and a temperature measuring element (102) is arranged on the hyperbolic cone (103) at the lower part of the raw material bin (1); the outlet of the hyperbolic cone (103) at the lower part of the raw material bin (1) is connected with the upper end of the gate valve (2) through a bolt.

3. The modular high-temperature material digestion system according to claim 1, characterized in that the lower end of the gate valve (2) is connected with a first-stage spiral pipe (301) in a double-pipe spiral scale (3) through a bolt, the first-stage spiral pipe (301) is connected with a second-stage spiral scale (303) through a first nonmetal expansion joint (302), and the second-stage spiral scale (303) is connected with the digester (4) through a second nonmetal expansion joint (304).

4. The modular pyromaterial digestion system according to claim 1, characterized in that the digester (4) comprises a stirring rod (405), a primary digester (401) and a secondary digester (403), the top of the first-level digester (401) is provided with a first-level digester access door (411), a first-level digester temperature measuring element (402) is installed on the first-level digester (401) body in the axial direction, a first-level digester driving device (407) is installed at the driving end of the first-level digester (401), a first-level digester driving gear pair (408) is installed at the non-driving end, a second-level digester access door (404) is arranged in the middle of the side face of the second-level digester (403) shell, a second-level digester temperature measuring element (406) is installed on the second-level digester (403) body in the axial direction, a second-level digester driving device (409) is installed at the driving end of the second-level digester (403), and.

5. The modular high-temperature material digestion system according to claim 4, characterized in that a primary nozzle device (805) is installed at the position of a feed inlet of the primary digester (401), the axial distance between the primary nozzle device (805) and the feed inlet of the secondary digester (403) is 0.3-0.5 m, a secondary nozzle device (806) is arranged at the axial distance of 0.1-0.3 m from the feed inlet of the secondary digester (403), and the quantitative water spraying system (8) further comprises a water spraying pump station (801), a flow control device (802), a water spraying water tank (803) and a pipeline system (804).

6. The modular high-temperature material digestion system according to claim 1, characterized in that the dust collection system (9) comprises a dust collector access door (901), a dust collector pulse system (902), a dust collection air pipe (903), a dust collector body (904) and a dust collection fan (905) with an inlet adjusting device.

7. The modular high-temperature material digestion system according to claim 6, characterized in that the dust collector conveying reamer (5) is connected with the dust collector body (904) through bolts, the dust collector conveying reamer (5) conveys dust-collected materials to the transverse conveying reamer (6), the transverse conveying reamer (6) is connected with a lower flange of a shell of the dust collector conveying reamer (5) through bolts, a flange at a discharge port of the transverse conveying reamer (6) is connected with an upper flange of the high-sealing rotary feeder (7) through bolts and provides structural support for the high-sealing rotary feeder (7), and a lower flange of the high-sealing rotary feeder (7) is connected with a material conveying pipeline.

Technical Field

The invention relates to the technical field of cement industry firing, in particular to a modular high-temperature material digestion system.

Background

The dry flue gas desulfurization refers to the application of powdery or granular absorbent, adsorbent or catalyst to remove gases containing sulfide in flue gas, and the dry flue gas circulating desulfurization in the cement industry is to remove gases containing sulfideThe main component is Ca (OH)₂Desulfurizing agent and SO in flue gas₂The reaction takes place to produce calcium sulfite and calcium sulfate (Ca (OH)₂+SO₂→CaSO₃+H₂O，CaSO₃+1/2O₂→CaSO₄) To remove SO in the flue gas₂Thereby achieving the aim of desulfurization. At present, the common practice of cement plants is to purchase Cao, add water, stir and digest the Cao into slurry with a certain concentration, and spray the slurry into a preheater by using a delivery pump SO as to reduce SO in flue gas₂The purpose of the content is called wet desulphurization. The wet desulphurization increases the operation cost of a cement plant, the equipment is seriously corroded, and slurry materials are sprayed into a firing system, so that the evaporation of water consumes the heat of the system, and huge heat loss is caused.

Disclosure of Invention

In order to overcome the existing defects, the invention provides a modularized high-temperature material digestion system.

The utility model provides a modularization high temperature material digestion system, includes that glassware, sprinkler, water injection system, digestion dust collecting system and structural framework under former feed bin, gate valve, double-barrelled spiral balance, digester, dust collector transport reamer, lateral transfer reamer, high sealed gyration, former feed bin places on structural framework, and the former feed bin lower part is the hyperbolic curve cone, and the hyperbolic curve cone passes through the gate valve and connects double-barrelled spiral balance, and double-barrelled spiral balance connects the digester, and the digester passes through the dust collector and carries the reamer to connect the lateral transfer reamer, and lateral transfer reamer intercommunication high sealed gyration glassware down, wherein, water injection system is connected to the digester to feed through digestion dust collecting system. The temperature of the high-temperature materials is 200-250 ℃, and the materials are powdery and granular.

The raw materials come from the burning system, and the digested and desulfurized materials are returned to the burning system without generating any solid waste. The desulfurization raw material comes from a sintering system, and the raw material purchasing cost is saved. The digested material is in a dry powder state, and is sprayed into or enters a sintering system along with the raw material, so that the energy loss of the system is reduced, and no negative influence is generated on the sintering system. The digested materials are powder and granule materials, and can be conveyed by pneumatic conveying, chute conveying, screw conveyer or bucket lifting conveying

Wherein, the base at the lower end of the raw material bin is uniformly provided with 3 weighing modules in the circumferential direction through bolts, the other end of each weighing module is fixed on the structural frame through bolts, and a temperature measuring element is arranged on a hyperbolic cone at the lower part of the raw material bin; the hyperbolic cone outlet at the lower part of the raw material bin is connected with the upper end of the gate valve through a bolt. The gate valve is controlled manually or electrically and is dynamically and continuously adjustable.

Wherein, the gate valve lower extreme passes through the bolt to be connected with the one-level spiral pipe in the double-barrelled spiral balance, and the one-level spiral pipe passes through first nonmetal expansion joint and connects the second grade spiral balance, and the second grade spiral balance passes through the nonmetal expansion joint of second and connects the digester. The material quantity control and the feeding are finished by a double-tube spiral scale, the feeding is accurate and reliable, and meanwhile, the air locking performance is good, and a digestion area and a raw material area are separated.

Wherein, the digester includes the puddler, one-level digester and second grade digester, wherein, one-level digester top sets up one-level digester access door, install one-level digester temperature measurement component on the one-level digester body axial direction, one-level digester drive arrangement is installed to one-level digester drive end, non-drive end installation one-level digester drive gear pair, second grade digester shell side middle part sets up second grade digester access door, second grade digester body axial direction is last to install second grade digester temperature measurement component, second grade digester drive arrangement is installed to second grade digester drive end, non-drive end installation second grade digester drive gear pair. The digester is a two-stage digester, and the chamber volumes of the two stages of digesters are the same. The residence time of the material in the second stage digester is 1.3-1.5 times of that of the first stage. The first level and the second level of the digester are double-shaft opposite-stirring structures, the stirring rod is of a paddle type blade structure, and paddles are connected to blade shafts through bolts and are replaceable.

Temperature monitoring components are installed at the feed inlet and the discharge outlet of each stage of the digester, and the water spraying quantity of the materials is reasonably controlled through the change of the temperature. The digester is double-shaft stirring and tangent in pitch circle, so that the materials are prevented from being bonded, the digested materials are fully stirred, the material hydration process is promoted, the digestion time is shortened, and the digestion rate is improved.

Wherein, the first-level digester pan feeding mouth position installation first-level nozzle device, first-level nozzle device is apart from second grade digester feed inlet axial distance for 0.3 meter-0.5 meter, and second grade nozzle device sets up in the department of apart from second grade digester pan feeding mouth axial distance 0.1 meter-0.3 meter, and quantitative water spray system still contains the water spray pump station, flow control device, water spray water tank and pipe-line system. The water spraying mode is a multi-nozzle and multi-point water spraying mode.

The digestion dust collecting system comprises a dust collector access door, a dust collector pulse system, a dust collecting air pipe, a dust collector body and a dust collecting fan with an inlet adjusting device. And the steam and dust generated in the process of digesting and conveying the high-temperature materials are finished by a dust collecting system of the digester. The working temperature of the dust collector system is 170-250 ℃, the dust collector shell and the digester shell are of an integrated modular structure, and a reamer for conveying dust-collected materials and digested materials is arranged below the dust collector shell and the digester shell. The digestion dust collecting system operates under micro negative pressure, and the operating negative pressure is negative 300-500Pa, so that the requirements of a dust collector and exhaust are met, a large amount of digestion water in the digestion process is prevented from being pumped out, and the digestion rate is reduced.

The dust collector conveying reamer is connected with the dust collector body through a bolt, dust collector conveying reamer conveys dust-collected materials to the transverse conveying reamer, the transverse conveying reamer is connected with a lower flange of a dust collector conveying reamer shell through a bolt, a discharge port flange of the transverse conveying reamer is connected with an upper flange of the high-seal rotary feeder through a bolt, structural support is provided for the high-seal rotary feeder, and the lower flange of the high-seal rotary feeder is connected with a material conveying pipeline. The digested material is conveyed to a high-sealing airlock valve by adopting a reamer with a U-shaped shell structure, so that the requirements of material conveying and sealing are met. The reamer is made of stainless steel materials, and material adhesion and equipment corrosion are avoided.

All the functional modules are integrated in a fixed frame, and the structure is stable and compact.

According to the modular high-temperature material digestion system provided by the invention, raw materials of the high-temperature material digestion system are put into a decomposing furnace or a final preheater in a cement burning system to extract high-temperature hot raw materials with 60% of CaO as a main component and at the temperature of about 850 ℃, and are taken, cooled and conveyed through relevant equipment. The desulfurizing agent Ca (OH) with the main component of slaked lime is generated in the high-temperature material digestion system₂(CaO+H₂O→Ca(OH)₂). Relative toFor wet desulphurization of an purchased desulfurizer, high-temperature materials are digested into dry powder materials, the dry powder materials are sprayed into high-temperature flue gas, raw materials enter a kiln and are carried in a bucket manner or both, the operation and the control are simple, any negative influence on kiln firing is avoided, and the method is the most effective means for realizing green circular economy and controlling the production cost in dry flue gas desulphurization in the cement industry.

The system is divided into 5 independent control units, each unit module is an independent closed-loop control system, a material taking system control unit, a digestion system control unit, a water spraying system control unit, a dust collection control unit and a material conveying control unit, key parameters of each control unit are fed back to a central control system, and the system is configured into a modularized high-temperature material digestion system control system, so that unit closed loop and unit closed loop are realized, and an unattended intelligent control system is realized.

Drawings

FIG. 1 is a schematic view of a modular high temperature material digestion system.

Detailed Description

The modular high-temperature material digestion system provided by the invention is described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows, a modularization high temperature material digestion system, including raw material storehouse 1, slide valve 2, double-barrelled spiral balance 3, digester 4, dust collector transport reamer 5, lateral transportation reamer 6, high sealed gyration glassware 7 down, water injection system 8, digestion dust collecting system 9 and structural framework 10, its characterized in that, raw material storehouse 1 is placed on structural framework 10, and raw material storehouse 1 lower part is hyperbola cone 103, and hyperbola cone 103 passes through slide valve 2 and connects double-barrelled spiral balance 3, and double-barrelled spiral balance 3 connects digester 4, and digester 4 passes through dust collector transport reamer 5 and connects lateral transportation reamer 6, and lateral transportation reamer 6 communicates high sealed gyration glassware 7 down, and wherein, digester 4 connects water injection system 8, and communicates digestion dust collecting system 9.

3 weighing modules 101 are uniformly arranged on the base at the lower end of the raw material bin 1 in the circumferential direction through bolts, the other ends of the weighing modules 101 are fixed on the structural frame 10 through bolts, and a temperature measuring element 102 is arranged on a hyperbolic cone 103 at the lower part of the raw material bin 1; the outlet of the hyperbolic cone 103 at the lower part of the raw material bin 1 is connected with the upper end of the gate valve 2 through a bolt.

The lower end of the gate valve 2 is connected with a first-level spiral pipe 301 in the double-pipe spiral scale 3 through a bolt, the first-level spiral pipe 301 is connected with a second-level spiral scale 303 through a first nonmetal expansion joint 302, and the second-level spiral scale 303 is connected with the digester 4 through a second nonmetal expansion joint 304.

The digester 4 comprises a stirring rod 405, a primary digester 401 and a secondary digester 403, wherein a primary digester access door 411 is arranged at the top of the primary digester 401, a primary digester temperature measuring element 402 is arranged in the axial direction of a body of the primary digester 401, a primary digester driving device 407 is arranged at the driving end of the primary digester 401, a primary digester driving gear pair 408 is arranged at the non-driving end, a secondary digester access door 404 is arranged in the middle of the side face of a shell of the secondary digester 403, a secondary digester temperature measuring element 406 is arranged in the axial direction of a body of the secondary digester 403, a secondary digester driving device 409 is arranged at the driving end of the secondary digester 403, and a secondary digester driving gear pair 410 is arranged at the non-driving end.

The primary nozzle device 805 is installed at the position of a feeding port of the primary digester 401, the axial distance from the primary nozzle device 805 to the feeding port of the secondary digester 403 is 0.3-0.5 m, the secondary nozzle device 806 is arranged at the position 0.1-0.3 m away from the axial distance from the feeding port of the secondary digester 403, and the quantitative water spraying system 8 further comprises a water spraying pump station 801, a flow control device 802, a water spraying water tank 803 and a pipeline system 804.

The digestion dust collecting system 9 comprises a dust collector access door 901, a dust collector pulse system 902, a dust collecting air pipe 903, a dust collector body 904 and a dust collecting fan 905 with an inlet adjusting device.

The dust collector conveying reamer 5 is connected with the dust collector body 904 through bolts, the dust collector conveying reamer 5 conveys dust-collected materials to the transverse conveying reamer 6, the transverse conveying reamer 6 is connected with a lower flange of a shell of the dust collector conveying reamer 5 through bolts, a discharge port flange of the transverse conveying reamer 6 is connected with an upper flange of the high-seal rotary feeder 7 through bolts, structural support is provided for the high-seal rotary feeder 7, and a material conveying pipeline is connected with a lower flange of the high-seal rotary feeder 7.

Examples

Digesting the high-temperature material at 250 ℃ by adopting 200-plus-material, feeding the material into a raw material bin 1 from the top center position, fixing a group of seats of the raw material bin 1 with three weighing modules 101 uniformly distributed in the circumferential direction through bolts, fixing the other ends of the weighing modules 101 on a structural frame 10 through bolts, feeding the material into the raw material bin, wherein the volume of the raw material bin is 3-5m³The material level control device has the functions of storing and buffering materials, and controls the material level with a certain height according to the program control requirement. A temperature sensor is arranged at the hyperbolic cone 1/4 of the raw material bin to detect and feed back the temperature of the incoming materials; a weighing sensor is arranged below the stock bin supporting group seat to monitor and feed back the stock level condition in the stock bin; the cone of the storage bin is of a hyperbolic structure.

The gate valve is arranged below the raw material bin, can be electrically or manually operated, but must be dynamically adjustable. The lower part of the gate valve is connected with a double-pipe spiral scale, a nonmetal expansion joint is arranged between the double-pipe spiral scale, and a nonmetal expansion joint is arranged between the second-stage spiral scale and the digester. The double-pipe spiral scale sends quantitative materials into the digester, and the double-pipe spiral scale adjusts the feeding amount according to the water spraying amount and the material digestibility of the first-stage digestion temperature measuring element, the second-stage digestion temperature measuring element and the water spraying system. The temperature measuring elements are arranged on the first-stage digester, the second-stage digester or the multistage digester, the distance A between the first-stage digester temperature measuring elements and the distance B between the second-stage digester temperature measuring elements are reasonably valued according to the following relation, the distance A between the first-stage digester temperature measuring elements is (1/4-1/3) L, the distance B between the second-stage digester temperature measuring elements is (1/3-1/2) L, and the temperature measuring elements monitor and feed back the temperature of the digestion materials in the digester.

The spiral scale is of a reliable sealing tubular structure, a nonmetal expansion joint is arranged between the first stage and the second stage, the first stage spiral scale has the functions of sealing and material flow stabilizing, the first stage transmission motor is a variable frequency motor, the second stage is a weighing link, a weighing sensor is arranged on the spiral scale, the whole double-tube spiral scale system is controlled in a closed loop mode, and the nonmetal expansion joint is arranged between the second stage spiral scale and a downstream digester of the second stage spiral scale, so that the requirements of sealing and temperature resistance of 200 and 250 ℃ are met.

After quantitative measurement, the high-temperature materials enter the digester 4, and under the stirring and conveying action of the stirring rod 405, the materials are hydrated. According to the metering result of the double-pipe spiral scale 3, the temperature of the first-stage digester temperature measuring element 402 and the temperature of the second-stage digester temperature measuring element 406 are monitored, water is quantitatively sprayed, and steam and dust generated in the digesting and conveying processes are completed by the digesting and dust collecting system 9. Materials collected by the dust collector are conveyed by the dust collector conveying reamer 5 arranged below the dust collector shell, a large amount of digested materials fall to the transverse conveying reamer 6 from the feed opening of the secondary digester 403 of the digester 4, the transverse conveying reamer 6 conveys the finally digested materials to the high-sealing rotary feeder 7, the flange below the high-sealing rotary feeder 7 is connected with a material conveying pipeline and the like, and the whole digestion process is completed.

The digester is key equipment of a digestion system, the digester is of a two-stage or multi-stage structure, each stage is of a double-shaft counter-stirring structure, one stirring shaft is a driving shaft, a driving device is installed, a pair of external gear wheels are installed at the non-transmission end of each double shaft, and the other stirring shaft is driven to rotate.

By reasonably selecting the output rotating speed of the first-stage, second-stage or multi-stage digester driving device and arranging the length of the digester, the material digestibility of the modular high-temperature material digestion system can reach 65-80%.

The digester is used for accommodating and receiving high-temperature materials conveyed by the double-pipe spiral scale, the digester is designed into a two-stage structure or a multi-stage structure according to the requirements of space, process and the like, a water spraying point is arranged on each stage of digester, and a water spraying system is controlled to spray quantitative water into each stage of digester according to the material quantity, the material temperature and the reaction temperature. Gas and dust generated in the stirring, digesting and conveying processes are finished by a digesting and dust collecting system. The digested materials are sent into a specially designed transverse reamer with a U-shaped shell structure, the transverse reamer not only receives the materials from the digester, but also receives the materials collected by the digestion and dust collection system, and the two materials are simultaneously sent into a high-sealing rotary feeder arranged below the transverse reamer.

Finally, it should be noted that the above examples are only intended to describe the technical solutions of the present invention and not to limit the technical methods, the present invention can be extended in application to other modifications, variations, applications and embodiments, and therefore all such modifications, variations, applications, embodiments are considered to be within the spirit and teaching scope of the present invention.