CN201380291Y - High-efficiency condenser used in short-flow reduction process of zinc powder - Google Patents
High-efficiency condenser used in short-flow reduction process of zinc powder Download PDFInfo
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- CN201380291Y CN201380291Y CN200920146085U CN200920146085U CN201380291Y CN 201380291 Y CN201380291 Y CN 201380291Y CN 200920146085 U CN200920146085 U CN 200920146085U CN 200920146085 U CN200920146085 U CN 200920146085U CN 201380291 Y CN201380291 Y CN 201380291Y
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- condenser
- zinc powder
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- heat exchange
- cooling tube
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Abstract
The utility model discloses a high-efficiency condenser used in a short-flow reduction process of zinc powder. The main body of the condenser is a sealed hollow cavity enclosed by a water-cooling jacket, an air inlet is formed at one end thereof and an exhaust gas outlet is formed at the other end thereof; the hollow cavity of the condenser is divided into a front segment, a middle segment and a rear segment according to the furnace gas flowing direction; a zinc powder bucket is arranged at the lower part of the condenser, and a zinc powder discharge mechanism is arranged at the lower part of the zinc powder bucket; and a metal jetting heat exchange cooling pipe manifold connected with a water supply pipe is arranged in each segment of the condenser, is downwardly inserted into the hollow cavity of the condenser from the top of the condenser, and is fixed on a top mounting base. The condenser can improve the local cooling intensity and ensure that the heat discharged from the furnace gas in the initial cooling stage can be timely moved out of the condenser, so that the condenser with remarkably improved individual productive capacity can be matched with a large-sized sealed type ore smelting electric arc furnace. Meanwhile, the produced zinc powder has controllable and adjustable particle size, so as to meet the different demands of various industries for zinc powder produced by short-flow reduction process.
Description
Technical field
The utility model relates to condenser, exactly is short-process reduction zinc powder manufacturing efficient condenser.
Background technology
Short-process reduction zinc powder is mainly used in the nonferrous metallurgical process as displacer, because of its fine size, many advantages such as activity is good, cost is low, replaces the application in the sector of blowing zinc powder and distillation zinc powder substantially.Its technological process of production is as follows: material containing zinc, reducing agent and flux are added the closed ore-smelting electric furnace, in stove under the suitable temperature and atmosphere, oxidation state zinc in the furnace charge is reduced into the zinc fume of metallic state, and other gas that zinc fume and electric furnace produce mixes the formation furnace gas; Furnace gas directly enters condenser by furnace throat; Furnace gas is in have to go to the toilet sharp fall temperature of condenser, and the zinc fume rapid condensation becomes reduction zinc powder (product), and cooled residue furnace gas leaves condenser and enters and gather dust and comprehensive recovery system.
Furnace gas be cooled to short-process reduction zinc powder produce in a ring of particular importance, what of the quality of zinc powder quality and output the height of cooling effectiveness directly have influence on.Existing condenser (seeing Fig. 1,2,3) is a closed cavity that the water-cooling jacket of being made by the metal material that has intake-outlet 1 surrounds, one end has the air inlet 2 that is connected with furnace throat, the other end has the tail gas outlet 3 that is connected with dust collecting system, according to the furnace gas flow direction, the condenser cavity is divided into leading portion 4, stage casing 5 and back segment 6; Condenser is the zinc powder bucket, and its underpart disposes zinc powder output mechanism 7; In addition,, generally also evenly be furnished with many groups of independently metal hoses 8 (seeing Fig. 4,5) in the condenser, be connected with cooling water in the pipe for strengthening the furnace gas cooling.Cold true the exothermic sub-fraction of furnace gas is taken away by the cooling water in the water-cooling wall, is most ofly in addition taken away by the cooling water in the metal hose.The condenser working principle comprises following two technical process:
1.1 furnace gas cooling and zinc powder condensation process are described:
1., high temperature (1000-1100 ℃) furnace gas that contains zinc fume enters the condenser leading portion from the condenser air inlet.Because temperature is lower in the condenser, in the process that furnace gas moves in condenser, zinc fume can change liquid state into and emit a large amount of latent heats of vaporization from gaseous state, forms a lot of liquid granule zinc pearls that disperse simultaneously.
2., owing to Temperature Distribution in the condenser is successively decreased from the front portion to the rear portion, furnace gas temperature in the running of condenser stage casing of carrying the liquid Zn pearl secretly can progressively reduce, liquid granule zinc pearl progressively pools the bigger liquid Zn pearl of particle in running, the liquid Zn pearl is emitted heat and is transformed into solid-stately by liquid state, becomes zinc powder.
3., at the condenser back segment, the most of zinc powder that furnace gas is carried secretly is towards falling in the powder bucket of condenser, more regularly by powder delivery mechanism eductor condenser, the furnace gas that carries a small amount of particulate zinc powder enters dust collecting system from the tail gas outlet.
1.2 heat transfer process is described:
By the description of process 1.1 as can be known, furnace gas is in running, and its contained zinc fume has from the gaseous state to the liquid state again to the transformation of solid-state physical form, therefore can emit a large amount of latent heat; Furnace gas also can be emitted a large amount of heats from high temperature to low temperature simultaneously.These heats are passed to outside the condenser by following two approach:
A, water-cooling jacket heat exchange: because furnace gas temperature is higher than condenser water-cooled jacket temperature, its heat can be delivered to the closed cavity inwall metal material outer surface that water-cooling jacket surrounds by the mode of radiation and convection heat transfer' heat-transfer by convection, is delivered to cooling water in the water-cooling jacket by the conduction and the heat transfer type of heat convection again; Cooling water flows to from the water-cooling jacket water inlet, flows out from the water-cooling jacket delivery port behind the absorption heat, thereby sub-fraction furnace gas heat is taken out of outside the condenser.
B, metal hose heat exchange: after furnace gas enters condenser, vertical current is to metal hose, its heat can be delivered to coiled pipe metal material outer surface by the mode of radiation and convection heat transfer' heat-transfer by convection, is delivered to cooling water in the metal hose by the conduction and the heat transfer type of heat convection again; Cooling water flows to from one of metal hose, flows out from the metal hose other end behind the absorption heat, thereby other most of furnace gas heat is taken out of outside the condenser.
Metal hose heat exchange amount accounts for more than 70% of furnace gas thermal discharge, and is big more than water-cooling jacket heat exchange amount, and it is as follows to analyze reason:
In metal hose is in the condenser cavity, furnace gas at first vertical current to metal hose, furnace gas mean temperature height, and flow velocity is fast, the coefficient of heat transfer is big; And water-cooling wall is in around the condenser, and the furnace gas mean temperature is low, and flow velocity is slow, the coefficient of heat transfer is little.In addition, because the restriction of condenser special construction design has determined that the heating surface area of metal hose is a lot of greatly than water-cooling wall.And the two cooling water mean temperature can think basic identical.According to complex heat transfer formula Q=α (t
2-t
1) (wherein Q is a heat output to F, and α is a complex heat transfer coefficient, t
2Be furnace gas mean temperature, t
1Be the cooling water mean temperature, F is a heating surface area) as can be known, metal hose heat exchange amount is bigger.
Progress along with smelting technique, the closed ore-smelting electric furnace that is used for the zinc smelting is just towards large scale development, existing heap(ed) capacity has reached 5000kVA, and zinc metallic reducing evaporability reaches 1500kg/h, and the maximum reduction zinc powder condensation ability of present single condenser is 600kg/h.For solving the two main equipment production capacities contradiction that do not match, existing method is closed ore-smelting electric furnace configuration two cover or a multiple muffle furnace larynx and condensers, though solved two main equipment production capacity matching problems, but simultaneously produced furnace gas that the closed ore-smelting electric furnace produces problems such as maldistribution on each condenser again, caused the condenser production capacity can not give full play to and the production process instability.Therefore developing efficient condenser is the task of top priority.
Defective one: the zinc powder condensation ability of existing condenser is limited by the intensity of cooling of the leading portion of condenser, and when the furnace gas amount strengthened, furnace gas can't effectively cool off at leading portion, caused condenser zinc powder condensation ability further not strengthen.
In the furnace gas cooling procedure, emitting maximum period of heat is the leading portion that enters condenser at furnace gas, account for furnace gas whole half of thermal discharges in condenser, this is because the interior zinc fume of furnace gas this moment becomes liquid state from gaseous state, discharge a large amount of latent heats of vaporization, if can not in time shift out outside the condenser this part heat, to cause in this section temperature too high, liquid little zinc bead surface tension force is low excessively, merge easily each other and become big, can compile and be cooled to the zinc film when zinc pearl that this change is big strikes on the metal hose and adhere on the coiled pipe, cause the metal hose cooling capacity progressively to descend, thereby form vicious circle.
Defective two: each section of condenser cooling capacity is basic identical, can not realize that the cooling capacity subregion is adjustable according to the needs of furnace gas process for cooling, and zinc powder particle size is uncontrollable.
Because the reduction zinc powder granule size is determined by condenser stage casing intensity of cooling.If the stage casing intensity of cooling is big especially, then the liquid granule zinc pearl of coming with furnace gas from leading portion can only pool the liquid Zn pearl than granule, and condensation becomes very thin zinc powder soon; If the stage casing intensity of cooling is little, then the liquid granule zinc pearl of coming with furnace gas from leading portion can pool the liquid Zn pearl of larger particles, and further condensation becomes very thick zinc powder; If the stage casing intensity of cooling is moderate, then the liquid granule zinc pearl of coming with furnace gas from leading portion can pool the liquid Zn pearl of median size particle, and further condensation becomes the zinc powder of medium-coarse.Each metal spiral coil cooling tube adopts identical material in the existing condenser, distribution density at each section is uniform, and a thermocouple only is housed on whole condenser, can not truly reflect the temperature conditions in each district of condenser, more impossible adjusting is respectively distinguished temperature to adapt to the needs of furnace gas process for cooling.
The utility model content
At the deficiency that prior art exists, the utility model aims to provide a kind of short-process reduction zinc powder manufacturing efficient condenser.
The technical solution adopted in the utility model is:
A kind of short-process reduction zinc powder manufacturing efficient condenser, its main body is to have the closed cavity that water-cooling jacket that the metal material of intake-outlet makes surrounds, one end has the air inlet that is connected with furnace throat, the other end has the tail gas outlet that is connected with dust collecting system, according to the furnace gas flow direction, the condenser cavity is divided into leading portion, stage casing and back segment, condenser is the zinc powder bucket, its underpart disposes the zinc powder output mechanism, described each section of condenser is provided with the metal jet heat exchange cooling tube cohort that is connected to supply channel, metal jet heat exchange cooling tube all inserts in the condenser cavity down from condenser overhead, is individually fixed on the mount pad of top.
Described metal jet heat exchange cooling tube is constituted by two inside and outside concentric metal sleeves that vary in size, and the equal metal material in the bottom of two pipes is shut, and has many apertures in the tube wall and the bottom of interior pipe.
Rounded or the flat seam of pipe aperture shape in described.
The interior pipe of described metal jet heat exchange cooling tube adopts seamless steel pipe, and the outer tube of condenser leading portion all adopts copper pipe or alternately adopt copper pipe and seamless steel pipe between many row's cooling tubes, and the outer tube of condenser stage casing and back segment all adopts seamless steel pipe.
The metal jet heat exchange cooling tube of described each section of condenser all adopts fork row.
The distribution density of described metal jet heat exchange cooling tube from the condenser leading portion to the stage casing and back segment successively decrease successively.
Described condenser overhead is equipped with three temperature elements that insert in the furnace gas down, and they are from being in the centre position of leading portion, stage casing, back segment respectively.
Described each section of condenser adopts independently supply channel to but water of this section metal jet heat exchange cooling tube central cooling.
The but electric control valve of discharge of band temperature element of teletransmission and flowmeter and controlled refrigeration is housed on the described supply channel.
Described condenser is provided with automatic control system, the intelligent temperature controller, PLC programmed controller and the warning device that comprise band PID regulatory function, each section of condenser temperature element is connected to intelligent temperature controller, intelligent temperature controller is to PLC programmed controller transport process result, and electric control valve, warning device, cold in-water temperature meter, cooling water flow meter all are connected to the PLC programmed controller and by its control.
The utility model adopts different metals injection heat transfer cooling tube to replace the metal spiral coil cooling tube, metal jet heat exchange cooling tube all inserts condenser down from condenser overhead, and in the different distribution density of each section employing, and increase control system, each section of realization condenser temperature is controlled automatically, can improve local intensity of cooling, guaranteeing a furnace gas in time shifts out outside the condenser at initial cooling section institute liberated heat, thereby realize the significantly raising of single condenser production capacity, closed ore-smelting electric furnace coupling makes it and maximizes, realize simultaneously the zinc powder particle size that produces controllable, satisfy the every profession and trade needs different to short-process reduction zinc powder.
Description of drawings
Fig. 1 is the cutaway view of existing condenser;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is the structural representation of metal hose;
Fig. 5 is the side view of Fig. 4;
Fig. 6 is the cutaway view of the utility model condenser;
Fig. 7 is the B-B view of Fig. 6;
Fig. 8 is the vertical view of Fig. 6;
Fig. 9 is the internal structure schematic diagram of metal jet heat exchange cooling tube;
Figure 10 is the C portion enlarged diagram of Fig. 9;
Figure 11 is the temperature automatically controlled block diagram of subregion of the present utility model.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail.
Description of reference numerals is as follows:
1---water-cooling jacket 2---air inlet
3---tail gas outlet 4---leading portion
5---stage casing 6---back segment
7---zinc powder output mechanism 8---metal hose
11---metal jet heat exchange cooling tube 12---supply channel
The interior pipe of 13---electric control valves 111---
112---aperture 113---outer tube
(1) metal jet heat exchange cooling tube:
Shown in Fig. 9,10, it is to be constituted by two inside and outside concentric metal sleeve pipes that vary in size, and the equal metal material in the bottom of two pipes is shut, and has many apertures 112 in the tube wall and the bottom of interior pipe 111 (tubule).Pipe 111 in cooling water enters from water system through aperture 112 ejection directive outer tubes 113 inwalls, absorbs outer tube 113 heats after flow out metal jet heat exchange cooling tube by the circumferential weld between the internal and external casing again.
Calculate and experience in the past according to theory, the injection heat transfer cooling tube can improve 3-10 doubly than the complex heat transfer coefficient of spiral coil cooling tube, the basic principle of this heat exchanger tube is exactly that applicating fluid jet impulse technology is strengthened convection heat transfer' heat-transfer by convection, thereby plays the complex heat transfer coefficient that improves cooling tube in the condenser, the effect that strengthens the condenser intensity of cooling.Interior pipe aperture 112 can be circular or flat seam shape, and its size, arrangement mode and phase mutual edge distance need determine according to factors such as inner and outer pipes size, cooling water pressure and flows.
The general seamless steel pipes that adopt of the interior pipe 111 of metal jet heat exchange cooling tube, outer tube material according to the different cooling sections of condenser to the requirement of intensity of cooling and difference.Because the thermal conductivity of copper is good, thermal resistance is minimum in the metal material, can increase substantially the complex heat transfer coefficient of metal jet heat exchange cooling tube.Because the intensity of cooling height that the condenser leading portion needs, so its outer tube all adopts copper pipe or alternately adopt copper pipe and seamless steel pipe between many row's cooling tube; The intensity of cooling that condenser stage casing and back segment need is successively decreased successively, so its outer tube all adopts seamless steel pipe.
(2) arrangement of metal jet heat exchange cooling tube and distribution density:
Shown in Fig. 6,7,8, metal jet heat exchange cooling tube 11 all inserts in the condenser cavity from condenser overhead, is individually fixed on the mount pad of top.The metal jet heat exchange cooling tube 11 of condenser leading portion 4, stage casing 5 and back segment 6 all adopts fork row, strengthens the furnace gas cooling, is convenient to the zinc powder condensation.
According to each section of condenser needs intensity of cooling and shift out the difference of heat, metal jet heat exchange cooling tube 11 is also different in the distribution density of each section.From the leading portion to the stage casing and the distribution density of back segment successively decrease successively.
(3) each section of condenser temperature subregion is controlled automatically:
The required theoretical temperatures rated value that reaches of each section of condenser is determined at the required theoretical temperatures numerical value of this section cooling by furnace gas, this control system is exactly for guaranteeing that each section actual temperature meets rated value, reach the condenser efficient operation, the satisfactory reduction zinc powder of output.
In condenser overhead three temperature elements that insert in the furnace gas are housed down, they are used to measure and control the furnace gas temperature of each section from being in the centre position of leading portion 4, stage casing 5, back segment 6 respectively.
Each section adopts independently supply channel 12 to but water of this section metal jet heat exchange cooling tube central cooling, and the but electric control valve 13 of discharge of the thermometer of band teletransmission and flowmeter and controlled refrigeration is housed on the pipeline.Because the cooling water jet speed on the coefficient of heat transfer of metal jet heat exchange cooling tube and the interior pipe in the aperture becomes positive correlation, thereby, to regulate cooling water flow and can effectively regulate each section of condenser temperature, realization is to the control of zinc powder particle size.
As shown in figure 11, electric-control system comprises the intelligent temperature controller, PLC programmed controller, warning device of band PID regulatory function etc.At first on intelligent temperature controller, set each section of condenser rated temperature according to arts demand, after temperature signal that temperature element transmits enters intelligent temperature controller, intelligent temperature controller is handled automatically and result is delivered to PLC, send regulating command by PLC to electric control valve again, when each section temperature over range, PLC sends alarm command to warning device; Water thermometer sends signal to PLC, and when cold in-water temperature was undesirable, PLC sent alarm command to warning device; Flowmeter sends signal to PLC, and when cooling water flow was undesirable, PLC sent alarm command to warning device.
This product has following advantage:
1) this product guarantees that single condenser production capacity effectively improves significantly, originally every condenser production capacity is 600kg/h, this product production capacity can reach 1500kg/h, improved 150%, can be suitable for the requirement that the closed ore-smelting electric furnace maximizes, thereby realize the maximization of short-process reduction zinc powder production line, eliminated the adverse effect of large-scale many condensers of closed ore-smelting electric furnace configuration producing;
2) owing to adopt, realize that zinc powder particle size is controllable to metal jet heat exchange cooling tube water rationing system and automatic control system; The employing of water temperature and flow instrument can guarantee to provide to condenser to ensure safety in production the cooling water of safety and stability;
3) condenser of a large-scale closed ore-smelting electric furnace configuration is compared many condensers of a large-scale closed ore-smelting electric furnace configuration, can take up an area of by minimizing equipment, reduces investment outlay;
4) metal jet heat exchange cooling tube is independently installed from condenser overhead, is convenient to change.
The utility model is not limited to above-mentioned preferred forms, and anyone can draw other various forms of products under enlightenment of the present invention.Though but on its shape or structure, do any variation, every identical with the utility model or akin technical scheme is all within its protection domain.
Claims (10)
1, a kind of short-process reduction zinc powder manufacturing efficient condenser, its main body is to have the closed cavity that water-cooling jacket that the metal material of intake-outlet makes surrounds, one end has the air inlet that is connected with furnace throat, the other end has the tail gas outlet that is connected with dust collecting system, according to the furnace gas flow direction, the condenser cavity is divided into leading portion, stage casing and back segment, condenser is the zinc powder bucket, its underpart disposes the zinc powder output mechanism, it is characterized in that, described each section of condenser is provided with the metal jet heat exchange cooling tube cohort that is connected to supply channel, and metal jet heat exchange cooling tube all inserts in the condenser cavity down from condenser overhead, is individually fixed on the mount pad of top.
2, short-process reduction zinc powder manufacturing efficient condenser according to claim 1, it is characterized in that, described metal jet heat exchange cooling tube is constituted by two inside and outside concentric metal sleeves that vary in size, the equal metal material in the bottom of two pipes is shut, and has many apertures in the tube wall and the bottom of interior pipe.
3, short-process reduction zinc powder manufacturing efficient condenser according to claim 2 is characterized in that, the rounded or flat seam of described interior pipe aperture shape.
4, short-process reduction zinc powder manufacturing efficient condenser according to claim 2 is characterized in that, the interior pipe of described metal jet heat exchange cooling tube adopts seamless steel pipe; The outer tube of condenser leading portion all adopts copper pipe or alternately adopt copper pipe and seamless steel pipe between many row's cooling tube, and the outer tube of condenser stage casing and back segment all adopts seamless steel pipe.
5, short-process reduction zinc powder manufacturing efficient condenser according to claim 1 is characterized in that, the metal jet heat exchange cooling tube of described each section of condenser all adopts fork row.
6, short-process reduction zinc powder manufacturing efficient condenser according to claim 1 is characterized in that, the distribution density of described metal jet heat exchange cooling tube from the condenser leading portion to the stage casing and back segment successively decrease successively.
7, short-process reduction zinc powder manufacturing efficient condenser according to claim 1 is characterized in that, described condenser overhead is equipped with three temperature elements that insert in the furnace gas down, and they are from being in the centre position of leading portion, stage casing, back segment respectively.
8, short-process reduction zinc powder manufacturing efficient condenser according to claim 1 is characterized in that, described each section of condenser adopts independently supply channel to but water of this section metal jet heat exchange cooling tube central cooling.
9, short-process reduction zinc powder manufacturing efficient condenser according to claim 8 is characterized in that, the but electric control valve of discharge of band temperature element of teletransmission and flowmeter and controlled refrigeration is housed on the described supply channel.
10, short-process reduction zinc powder manufacturing efficient condenser according to claim 9, it is characterized in that, described condenser is provided with automatic control system, the intelligent temperature controller, PLC programmed controller and the warning device that comprise band PID regulatory function, each section of condenser temperature element is connected to intelligent temperature controller, intelligent temperature controller is to PLC programmed controller transport process result, and electric control valve, warning device, cold in-water temperature meter, cooling water flow meter all are connected to the PLC programmed controller and by its control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920146085U CN201380291Y (en) | 2009-03-24 | 2009-03-24 | High-efficiency condenser used in short-flow reduction process of zinc powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920146085U CN201380291Y (en) | 2009-03-24 | 2009-03-24 | High-efficiency condenser used in short-flow reduction process of zinc powder |
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| CN201380291Y true CN201380291Y (en) | 2010-01-13 |
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| CN200920146085U Expired - Fee Related CN201380291Y (en) | 2009-03-24 | 2009-03-24 | High-efficiency condenser used in short-flow reduction process of zinc powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354320A (en) * | 2017-09-17 | 2017-11-17 | 贵州明峰工业废渣综合回收再利用有限公司 | A kind of efficient Zinc powder production device |
| CN107604179A (en) * | 2017-09-17 | 2018-01-19 | 贵州明峰工业废渣综合回收再利用有限公司 | A kind of collecting device for zinc powder production |
| CN111363933A (en) * | 2020-03-16 | 2020-07-03 | 广西大学 | Production equipment and method of high-purity gallium |
| CN113278816A (en) * | 2021-03-31 | 2021-08-20 | 宁波锦越新材料有限公司 | Ultra-high purity aluminum crystallization device |
-
2009
- 2009-03-24 CN CN200920146085U patent/CN201380291Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354320A (en) * | 2017-09-17 | 2017-11-17 | 贵州明峰工业废渣综合回收再利用有限公司 | A kind of efficient Zinc powder production device |
| CN107604179A (en) * | 2017-09-17 | 2018-01-19 | 贵州明峰工业废渣综合回收再利用有限公司 | A kind of collecting device for zinc powder production |
| CN111363933A (en) * | 2020-03-16 | 2020-07-03 | 广西大学 | Production equipment and method of high-purity gallium |
| CN113278816A (en) * | 2021-03-31 | 2021-08-20 | 宁波锦越新材料有限公司 | Ultra-high purity aluminum crystallization device |
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Granted publication date: 20100113 Termination date: 20180324 |