CN203033904U - Improved combined rotor drum granulation equipment for large granular urea - Google Patents
Improved combined rotor drum granulation equipment for large granular urea Download PDFInfo
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- CN203033904U CN203033904U CN 201220656429 CN201220656429U CN203033904U CN 203033904 U CN203033904 U CN 203033904U CN 201220656429 CN201220656429 CN 201220656429 CN 201220656429 U CN201220656429 U CN 201220656429U CN 203033904 U CN203033904 U CN 203033904U
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Abstract
The utility model relates to improved combined rotor drum granulation equipment for large granular urea. The improved combined rotor drum granulation equipment comprises a combined granulation rotor drum, a cooler with a movable bed and a screening machine. The combined granulation rotor drum, the cooler with the movable bed and the screening machine are sequentially connected with one another, the cooler with the movable bed comprises a bottom plate with a variable passage area, a feed inlet, an air inlet, a discharge outlet and an air outlet, urea grains discharged out of the combined granulation rotor drum are fed into the cooler with the movable bed from the feed inlet on the upper portion of the cooler with the movable bed, a dynamic bed is formed in the cooler with the movable bed, cooling air can flow into the cooler with the movable bed from the air inlet on the bottom plate with the variable passage area, flows through the urea grains and is exhausted from the air outlet on the upper portion of the cooler with the movable bed, and cooled urea grains are discharged to the screening machine from the discharge outlet on the bottom plate with the variable passage area and are screened by the screening machine to obtain finished products. The improved combine rotor drum granulation equipment has the advantages that the equipment is provided with the cooler with the movable bed, accordingly, a combined rotor drum cooling component is omitted, a combined rotor drum granulation process for the large granular urea is simplified, energy is saved, and the cost is lowered.
Description
Technical field
The utility model relates to the technical field of urea production, particularly a kind of improved combined drum granulating large granule urea equipment.Background technology
The utility model is to be ZL 99122286.5 to the patent No., name is called the improvement application of the patent of invention of " large size particle urea composite rotary drum prilling process and equipment ", the urea of discharging from the combination granulating rotating drum in the summary of the invention of ZL99122286.5 patent will cool off in the combination drum cooler, the combination drum cooler is made up of rotary drum and built-in ripple plate water cooler, ripple plate water cooler when making owing to steel sheet will be pressed into waveform, and need spot welding between the waveform, its complex process, so combination drum cooler cost and energy consumption are all than higher, and the efficient of utilizing ripple plate and rotary drum technology to cool off has much room for improvement, and therefore needs a kind of more advanced, succinct equipment makes improvements.
The utility model content
The utility model at existing combined drum granulating large granule urea equipment because the efficient that adopts the combination drum cooler to cause is low, cost and the high problem of energy consumption, a kind of improved combined drum granulating large granule urea equipment is provided, this equipment adopts the moving-bed water cooler, save combination drum cooler parts, simplified large size particle urea composite rotary drum prilling process, improved production efficiency and reduced cost.
The technical solution of the utility model is as follows:
A kind of improved combined drum granulating large granule urea equipment, comprise combination granulating rotating drum and sieve apparatus, it is characterized in that, also comprise the moving-bed water cooler, described moving-bed water cooler links to each other with sieve apparatus with the combination granulating rotating drum respectively, described moving-bed water cooler comprises changeable channel area base plate, opening for feed, blast inlet, discharge port and air outlet, described opening for feed and air outlet all are arranged on the top of moving-bed water cooler, described blast inlet and discharge port arrange all on changeable channel area base plate, the pressure of described air outlet is lower than blast inlet, the urea granules of discharging from the combination granulating rotating drum enters the moving-bed water cooler from the opening for feed on moving-bed water cooler top, and in the moving-bed water cooler, form dynamic bed, cooling air enters the moving-bed water cooler and passes urea granules from the air outlet discharge on moving-bed water cooler top from the blast inlet on the changeable channel area base plate, and cooled urea granules is expelled to from the discharge port on the changeable channel area base plate and obtains finished product after sieve apparatus sieves.
Changeable channel area base plate in the described moving-bed water cooler is horizontal drawing type changeable channel area base plate or flap folding type changeable channel area base plate.
Described combination granulating rotating drum comprises a plurality of folding shape flights that are arranged on the rotary drum inwall, with coaxial back taper flute profile and the discrepant fluidized-bed of bed wall height that is arranged in the described rotary drum of the rotary drum of combination granulating rotating drum, the atomized water cooling system, the multihole distributor that described fluidized-bed bottom arranges near the bottom, be arranged on fusing urea inlet pipe and fluidization air inlet tube and the cooling water inlet pipe of described rotary drum one side, material discharge port and the air of opposite side, the correspondence position of described fusing urea inlet pipe and fluidized-bed has a plurality of substance nozzle, and the fluidized-bed length of every 150-500mm is provided with a substance nozzle; Described atomized water cooling system comprises the water-cooled tube with the coaxial setting of rotary drum of making up granulating rotating drum, described water-cooled tube is arranged on the fluidized-bed below of combination granulating rotating drum and is provided with a plurality of water coolant nozzles with the fluidized-bed correspondence position, its injection flow rate is relevant with fusing urea quantity, and its weight ratio is 0-0.05.
Combination drum cooler in the described equipment and the use in parallel of described moving-bed water cooler.
The air outlet of the air of described combination granulating rotating drum and moving-bed water cooler all is communicated with by the bottom of the urea prilling tower in induced draft fan and the common urea process unit.
The air outlet of the air of described combination granulating rotating drum and moving-bed water cooler all is communicated with dust washing tower in the common urea process unit by induced draft fan.
Technique effect of the present utility model is as follows:
Improved combined drum granulating large granule urea equipment described in the utility model, the combination granulating rotating drum is set, moving-bed water cooler and sieve apparatus, in the combination granulating rotating drum, the conversion of urea nucleus particle is generated urea granules, the urea granules of discharging from the combination granulating rotating drum enters the moving-bed water cooler, and in the moving-bed water cooler, form dynamic bed, changeable channel area base plate in the moving-bed water cooler enters cooling air, with the dynamic bed inverse motion of being formed by urea granules, namely this cooling air moves from bottom to top, the dynamic bed that urea granules is formed moves from top to bottom, cooling air and urea granules carry out thermal exchange, so cooling air can be taken the heat of urea granules out of, cooled urea granules obtains finished product after described changeable channel area base plate discharge is sieved again.The utility model improves existing combined drum granulating large granule urea equipment, save combination drum cooler parts, adopt the moving-bed water cooler of ad hoc structure to cool off by the urea granules that the moving-bed cooling technology will make up the granulating rotating drum discharge, adopt changeable channel area base plate to make urea granules form dynamic bed in the moving-bed water cooler, with the cooling air adverse current to carry out the cooling of urea granules, mode than ripple plate water cooler and rotary drum cooling is simply direct, simplified large size particle urea composite rotary drum prilling process, obviously reduced energy consumption, save energy, can also improve the cooling efficiency of urea granules, need not to adopt complex structure and the high combination drum cooler parts of cost, so reduced the cost of granular urea combination granulation, saved great amount of investment.
Changeable channel area base plate in the moving-bed water cooler is horizontal drawing type changeable channel area base plate or flap folding type changeable channel area base plate, adopt horizontal pull mode or flap folding mode to adjust aisle spare, and then the change urea granules is discharged the speed of mobile cold bed water cooler, further, changeable channel area base plate is set adjusts aisle spare by horizontal pull mode or flap folding mode according to real needs, can prolong the cooling air that enters in the moving-bed water cooler with duration of contact of urea granules, increase the contact area of cooling air and urea granules, make cooling air more fully the heat of urea granules be taken away, increase the heat exchange effect.
In the fluidized-bed of combination granulating rotating drum, the fusing urea drop evenly is sprayed at urea nucleus particle surface in the fluidized-bed, fluidization air solidifies and cooling the bonding fusing urea of urea nucleus particle surface, in the combination granulating rotating drum, also adopt the atomized water cooling system to finish water coolant spraying gasification, vaporization heat helps the urea nucleus particle of the bonding fusing urea in surface further to lower the temperature, the final urea granules that reduces generation goes out to make up the temperature of granulating rotating drum, reaches the effect of the total energy consumption that reduces granulation.
Combination drum cooler and the use in parallel of described moving-bed water cooler are set, the combination drum cooler of this moment is as auxiliary cooling apparatus, so the making to the combination drum cooler requires lower, and the combination drum cooler can adopt bantam, its cost cost and energy consumption are lower than existing equipment equally, certainly because the efficient of moving-bed water cooler is higher than the combination drum cooler, needn't not start the combination drum cooler so there are Special Circumstances.
The urea-containing waste gas of discharging from combination granulating rotating drum and moving-bed water cooler is introduced the common urea process unit in the urea prilling tower through induced draft fan under specific circumstances, be discharged into atmosphere after the fusing urea drop washing of in described urea prilling tower, spraying from top to bottom, utilize the urea prilling tower in the existing urea process device that urea-containing waste gas is washed, simplified the granular urea production technique, production cost is greatly reduced.Described urea-containing waste gas also can arrange a small-sized dust washing tower and carry out the waste gas washing when the washability deficiency of urea prilling tower, and laid down cost and the energy consumption of this moment are lower than existing equipment equally.Certainly, the dust washing tower still is being set generally speaking, the urea-containing waste gas of discharging from combination granulating rotating drum and moving-bed water cooler also can carry out the waste gas washing in induced draft fan is introduced dust prilling tower the common urea process unit.
Description of drawings
Fig. 1 is the structural representation of the improved combined drum granulating large granule urea equipment of the utility model.
Fig. 2 is first kind of preferred structure synoptic diagram of the improved combined drum granulating large granule urea equipment of the utility model.
Fig. 3 is second kind of preferred structure synoptic diagram of the improved combined drum granulating large granule urea equipment of the utility model.
Fig. 4 is the structural representation of the utility model moving-bed water cooler.
Fig. 5 a and 5b are two kinds of preferred structure synoptic diagram of the changeable channel area base plate in the moving-bed water cooler shown in Figure 4.
Each symbology is as follows among the figure:
The 1-fusing urea; The 2-fluidization air; The 3-water coolant; 4-returning charge particle; The 5-finished product; 6-makes up granulating rotating drum; 7-moving-bed water cooler; The 8-sieve apparatus; 9-makes up drum cooler; The 10-pulverizer; 11-dust washing tower; The 12-urea prilling tower; The 13-vibratory screening apparatus; The 14-melting device; The 15-urea pump; The 16-induced draft fan; 17-changeable channel area base plate; The 18-housing; The 19-opening for feed; The 20-air outlet.
Embodiment
Below in conjunction with accompanying drawing the utility model is described.
The improved combined drum granulating large granule urea equipment that the utility model is related, as shown in Figure 1, comprise the combination granulating rotating drum, moving-bed water cooler and the sieve apparatus that connect successively, the principle of work of this equipment is to generate urea granules and discharge earlier in the fluidized-bed of combination granulating rotating drum, the urea granules of discharging enters the moving-bed water cooler and cools off, and obtains finished product after sieving by sieve apparatus again.Concrete workflow is: fusing urea 1 and fluidization air 2 are all introduced in the combination granulating rotating drum by pipeline, in the fluidized-bed of combination granulating rotating drum, fusing urea 1 drop evenly is sprayed at the urea nucleus particle surface in the fluidized-bed, under fluidization air 2 effects from the bottom to top, urea nucleus particle constantly increases under boiling state, discharges from the combination granulating rotating drum behind the urea granules of the different sizes of generation; Enter the moving-bed water cooler from the urea granules that makes up the granulating rotating drum discharge and cool off, cooled urea granules obtains finished product 5 after the discharge of moving-bed water cooler is sieved by sieve apparatus again.
Equipment described in the utility model adopts specific moving-bed water cooler to make up the cooling process of the urea granules of granulating rotating drum discharge, the structure of moving-bed water cooler as shown in Figure 4, comprise changeable channel area base plate 17, housing 18, opening for feed 19, blast inlet, discharge port and air outlet 20, opening for feed 19 and air outlet 20 all are arranged on the top of moving-bed water cooler, and blast inlet and discharge port arrange all on changeable channel area base plate 17.Blast inlet place on air outlet 20 and the changeable channel area base plate 17 causes certain pressure reduction by blower fan, the pressure of air outlet 20 is lower than blast inlet, the dynamic bed that cooling air is formed by urea granules by processing requirement, blast inlet pressure keep negative pressure, normal pressure or malleation all can.The urea granules of discharging from the combination granulating rotating drum enters the moving-bed water cooler from the opening for feed 19 on moving-bed water cooler top, urea granules relies on gravity movement from the top down in moving-bed water cooler 6, in the moving-bed water cooler, form dynamic bed, cooling air enters the moving-bed water cooler and passes urea granules from air outlet 20 discharges on moving-bed water cooler top from the blast inlet on the changeable channel area base plate 17, be cooling air and urea granules inverse motion, the urea granules heat is taken out of, the dynamic bed temperature that urea granules is formed progressively reduces from top to bottom, cooling air temperature progressively improves from top to bottom, cooling air directly contacts with urea granules and carries out heat exchange, reach the effect of urea granules cooling, cooled urea granules is expelled to sieve apparatus from the discharge port on the changeable channel area base plate 17.Leaving the urea granules temperature of moving-bed water cooler 6 can be down to below 50 ℃.
Changeable channel area base plate 17 is preferably the flap folding type changeable channel area base plate shown in the horizontal drawing type changeable channel area base plate shown in Fig. 5 a or Fig. 5 b, changeable channel area base plate 17 in the moving-bed water cooler adopts horizontal pull mode or flap folding mode to form dynamic bed to adjust aisle spare according to real needs, can prolong the cooling air that enters in the moving-bed water cooler with duration of contact of urea granules, and then the change urea granules is discharged the speed of mobile cold bed water cooler, increase the contact area of cooling air and urea granules, make cooling air more fully the heat of urea granules be taken away, increase the heat exchange effect.When the urea granules speed that enters the moving-bed water cooler from opening for feed 19 equates with the urea granules speed of discharging the moving-bed water cooler, form the material level of a running balance in the moving-bed water cooler.
First kind of preferred structure synoptic diagram of equipment described in the utility model comprises combination granulating rotating drum 6, moving-bed water cooler 7, combination drum cooler 9, sieve apparatus 8, pulverizer 10 and dust washing tower 11 as shown in Figure 2.Wherein make up granulating rotating drum 6 and comprise a plurality of folding shape flights that are arranged on the rotary drum inwall, with coaxial back taper flute profile and the discrepant fluidized-bed of bed wall height that is arranged in the described rotary drum of the rotary drum of combination granulating rotating drum, the atomized water cooling system, the multihole distributor that the fluidized-bed bottom arranges near the bottom, be arranged on fusing urea inlet pipe and fluidization air inlet tube and the cooling water inlet pipe (fusing urea 1 that difference is corresponding shown in Figure 2 of described rotary drum one side, fluidization air 2 and water coolant 3), material discharge port and the air of opposite side, the correspondence position of described fusing urea inlet pipe and fluidized-bed has a plurality of substance nozzle, and the fluidized-bed length of every 150-500mm is provided with a substance nozzle; Described atomized water cooling system comprises the water-cooled tube with the coaxial setting of rotary drum of making up granulating rotating drum, described water-cooled tube is arranged on the fluidized-bed below of combination granulating rotating drum and is provided with a plurality of water coolant nozzles with the fluidized-bed correspondence position, its injection flow rate is relevant with fusing urea quantity, and its weight ratio is 0-0.05.Fusing urea 1, fluidization air 2 and water coolant 3 are all introduced in the combination granulating rotating drum 6 by pipeline.Temperature is preferably 85 ℃-105 ℃ in the fluidized-bed of combination granulating rotating drum 6, and the flow of fluidization air 2 in fluidized-bed is relevant with fluidization air character, and it is 2000-5000 cubic meters that fusing urea 1 per ton needs the flow of fluidization air 2.Fluidization air 2 solidifies and cooling the bonding molten urea solution of urea nucleus particle surface, and the temperature that fusing urea 1 enters combination granulating rotating drum 6 is 134 ℃ ± 1 ° C, is solidifying under the effect of fluidization air 2 and is being cooled to about 90 ℃.The water coolant 3 of sending into combination granulating rotating drum 6 by pipeline is liquid water when sending into, and atomizing step of going forward side by side becomes vapourous water in the combination granulating rotating drum, help the surface bonding the urea nucleus particle of fusing urea 1 further lower the temperature.If the cooling effect of fluidization air 2 has reached the technology purpose certainly, the pipeline of water coolant 3 also can be in closing condition, needn't drop into combination granulating rotating drum 6.
In the combined drum granulating large granule urea equipment shown in Figure 2, also adopted combination drum cooler 9, combination drum cooler 9 is in parallel with moving-bed water cooler 7, and namely The combined is used.Moving-bed water cooler 7 can isolated operation, and both also can move simultaneously during as needs, certainly because the efficient of moving-bed water cooler 7 is higher than combination drum cooler 9, needn't starts as no Special Circumstances and to make up drum cooler 9.Cooled urea granules enters sieve apparatus 8 and is further divided into three tunnel outputs: the pulverizer 10 of leading up to connects combination granulating rotating drum 6, for sending pulverizer 10 broken backs to return combination granulating rotating drum 6 as crystal seed (Figure 2 shows that returning charge particle 4) foldback after the top layer oversize granule is drawn; One the tunnel is that finished product 5 is directly exported as qualified product; Another road directly connects combination granulating rotating drum 6, returns combination granulating rotating drum 6(for direct foldback after the defective small-particle of lower floor is drawn and sees returning charge particle 4 shown in Figure 2).Combination granulating rotating drum 6 is connected dust washing tower 11 with the urea-containing waste gas that moving-bed water cooler 7 is discharged and carries out the waste gas washing.After being sieve apparatus 8 screenings, excessive urea granules returns granulation again in the combination granulating rotating drum 6 together through pulverizing and too small urea granules.
Equipment shown in Figure 2 is provided with dust washing tower 11, is sent to 11 washings of dust washing tower from the urea-containing waste gas that makes up granulating rotating drum 6 and 7 discharges of moving-bed water cooler.Second kind of preferred structure that also can be as shown in Figure 3, the air of combination granulating rotating drum 6 and the air outlet of moving-bed water cooler 7 all are communicated with the bottom of urea prilling tower 12 in the common urea process unit by induced draft fan 16, will make up urea-containing waste gas that granulating rotating drum 6 and moving-bed water cooler 7 discharge through bottom that induced draft fan 16 is introduced urea prilling tower 12 in the common urea process units, and motion from bottom to top in described urea prilling tower 12, be discharged into atmosphere after the fusing urea drop that in described urea prilling tower 12, the sprays washing from top to bottom.Simultaneously, the urea granules that urea prilling tower 12 bottoms generate enters melting device 14 through vibratory screening apparatus 13 screenings than small-particle, is fused into molten state urea and is sent to urea pump 15 in the urea technique device, beats past urea prilling tower 12 and pushes up granulation again; The larger particles that vibratory screening apparatus 13 sieves out is sent in the combination granulating rotating drum 6 as described urea nucleus particle for the production of the qualified urea granules of particle (being finished product 5), can improve the production efficiency of combination granulating rotating drum 6.Certainly, when urea-containing waste gas when the washability of urea prilling tower 12 is not enough, also can be sent to the dust washing tower, dust washing tower 11 as shown in Figure 2 namely can also be set.That is to say, the dust washing tower still is being set generally speaking, the urea-containing waste gas of discharging from the moving-bed water cooler also can carry out the waste gas washing in induced draft fan is introduced dust prilling tower the common urea process unit.In addition, the difference with Fig. 2 is that structure shown in Figure 3 does not arrange combination drum cooler 9, but uses the moving-bed water cooler separately.
Should be pointed out that the above embodiment can make those skilled in the art more fully understand the invention, but do not limit the present invention in any way creation.Therefore; although this specification sheets has been described in detail the invention with reference to drawings and Examples; but; those skilled in the art are to be understood that; still can make amendment or be equal to replacement the invention; in a word, all do not break away from technical scheme and the improvement thereof of the spirit and scope of the invention, and it all should be encompassed in the middle of the protection domain of the invention patent.
Claims (6)
1. improved combined drum granulating large granule urea equipment, comprise combination granulating rotating drum and sieve apparatus, it is characterized in that, also comprise the moving-bed water cooler, described moving-bed water cooler links to each other with sieve apparatus with the combination granulating rotating drum respectively, described moving-bed water cooler comprises changeable channel area base plate, opening for feed, blast inlet, discharge port and air outlet, described opening for feed and air outlet all are arranged on the top of moving-bed water cooler, described blast inlet and discharge port arrange all on changeable channel area base plate, the pressure of described air outlet is lower than blast inlet, the urea granules of discharging from the combination granulating rotating drum enters the moving-bed water cooler from the opening for feed on moving-bed water cooler top, and in the moving-bed water cooler, form dynamic bed, cooling air enters the moving-bed water cooler and passes urea granules from the air outlet discharge on moving-bed water cooler top from the blast inlet on the changeable channel area base plate, and cooled urea granules is expelled to from the discharge port on the changeable channel area base plate and obtains finished product after sieve apparatus sieves.
2. equipment according to claim 1 is characterized in that, the changeable channel area base plate in the described moving-bed water cooler is horizontal drawing type changeable channel area base plate or flap folding type changeable channel area base plate.
3. equipment according to claim 1 and 2, it is characterized in that, described combination granulating rotating drum comprises a plurality of folding shape flights that are arranged on the rotary drum inwall, with coaxial back taper flute profile and the discrepant fluidized-bed of bed wall height that is arranged in the described rotary drum of the rotary drum of combination granulating rotating drum, the atomized water cooling system, the multihole distributor that described fluidized-bed bottom arranges near the bottom, be arranged on fusing urea inlet pipe and fluidization air inlet tube and the cooling water inlet pipe of described rotary drum one side, material discharge port and the air of opposite side, the correspondence position of described fusing urea inlet pipe and fluidized-bed has a plurality of substance nozzle, and the fluidized-bed length of every 150-500mm is provided with a substance nozzle; Described atomized water cooling system comprises the water-cooled tube with the coaxial setting of rotary drum of making up granulating rotating drum, described water-cooled tube is arranged on the fluidized-bed below of combination granulating rotating drum and is provided with a plurality of water coolant nozzles with the fluidized-bed correspondence position, its injection flow rate is relevant with fusing urea quantity, and its weight ratio is 0-0.05.
4. equipment according to claim 1 and 2 is characterized in that, also comprises the combination drum cooler, described combination drum cooler and the use in parallel of described moving-bed water cooler.
5. equipment according to claim 1 and 2 is characterized in that, the air outlet of the air of described combination granulating rotating drum and moving-bed water cooler all is communicated with by the bottom of the urea prilling tower in induced draft fan and the common urea process unit.
6. equipment according to claim 1 and 2 is characterized in that, the air outlet of the air of described combination granulating rotating drum and moving-bed water cooler all is communicated with dust washing tower in the common urea process unit by induced draft fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220656429 CN203033904U (en) | 2012-12-03 | 2012-12-03 | Improved combined rotor drum granulation equipment for large granular urea |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220656429 CN203033904U (en) | 2012-12-03 | 2012-12-03 | Improved combined rotor drum granulation equipment for large granular urea |
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| CN203033904U true CN203033904U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220656429 Expired - Lifetime CN203033904U (en) | 2012-12-03 | 2012-12-03 | Improved combined rotor drum granulation equipment for large granular urea |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964148A (en) * | 2012-12-03 | 2013-03-13 | 李思斌 | Improved large granule urea combined drum granulating method and equipment |
-
2012
- 2012-12-03 CN CN 201220656429 patent/CN203033904U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964148A (en) * | 2012-12-03 | 2013-03-13 | 李思斌 | Improved large granule urea combined drum granulating method and equipment |
| CN102964148B (en) * | 2012-12-03 | 2014-07-16 | 李思斌 | Improved large granule urea combined drum granulating method and equipment |
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Granted publication date: 20130703 |
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