CN104174326A - Spray granulating drying tower - Google Patents
Spray granulating drying tower Download PDFInfo
- Publication number
- CN104174326A CN104174326A CN201410346752.3A CN201410346752A CN104174326A CN 104174326 A CN104174326 A CN 104174326A CN 201410346752 A CN201410346752 A CN 201410346752A CN 104174326 A CN104174326 A CN 104174326A
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- nozzle
- nitrogen
- tower body
- spray granulating
- drying tower
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Abstract
The invention discloses a spray granulating drying tower, which comprises a tower body, a gas flow distributor, a product outlet formed in the bottom of the tower body, a formaldehyde solution inlet formed in the top of the tower body and a nitrogen inlet formed in the upper part of the tower body, wherein the nitrogen inlet is connected with the gas flow distributor; a sprayer is arranged in the tower body and comprises a nozzle and a pipe connector which are in threaded connection; the nozzle comprises a nozzle body and a nozzle hole formed in the front end of the nozzle body; and a detachable spiral flow path blade is embedded in the central part of the nozzle body. According to the spray granulating drying tower, the formaldehyde solution can be sprayed out with high speed to form highly dispersed mist formaldehyde which is in contact with the nitrogen in the same direction with the nitrogen for heat exchange cooling; and meanwhile, the nitrogen can be dispersed to the greatest extent by the gas flow distributor, so that the nitrogen and the mist formaldehyde can be in sufficient contact to obtain a paraformaldehyde target product of uniform grain sizes.
Description
Technical field
The invention belongs to chemical production equipment technical field, relate in particular to the mist projection granulating tower for paraformaldehyde.
Background technology
Can there is polymerization in formalin, generate the condensate of paraformaldehyde-white powdery linear structure in long-term storage or concentration operation process.Reaction equation is as follows:
The balanced reaction generating is subject to H
+the impact of concentration is larger, and the existence of micro-polar substances, as acid, alkali and water etc. all can accelerate the carrying out of polymerisation.Temperature also has impact, and when temperature is low, reaction is moved to the direction that generates polymer, when temperature raises to reverse movement.When temperature is very high, depolymerization generates monomer even completely, and while especially having acid to exist, heating more easily makes it be depolymerized to gaseous formaldehyde monomer.
Prepare paraformaldehyde key and be to control the product degree of polymerization, prevent the polymerization of formaldehyde height, shorten the drying and dehydrating time, improve product yield.Under perfect condition, formalin is by being pumped in granulation tower, and process shower nozzle sprays the paraformaldehyde that cooling polymerization forms the uniform grading of the degree of polymerization about n=11.But when prior art is passed through spray granulating and drying tower, oxymethylene polymerization is spent and is caused greatly particle diameter inhomogeneous.
Summary of the invention
Goal of the invention: for problem and the defect of above-mentioned existence, the invention provides a kind of spray granulating and drying tower, the formaldehyde mist that can make formalin height of formation disperse, and make nitrogen and formaldehyde mist along the abundant contact heat-exchanging of direction by air distributor, thereby obtain the uniform paraformaldehyde product of particle diameter, avoid the paraformaldehyde degree of polymerization too high.
Technical scheme: for achieving the above object, the present invention is by the following technical solutions: a kind of spray granulating and drying tower, comprise tower body, air distributor, be located at tower body bottom products export, be located at the formalin entrance at tower body top and be located at the nitrogen inlet on tower body top, described nitrogen inlet is connected with air distributor; Tower body inside also arranges shower nozzle, and described shower nozzle comprises nozzle and the pipe joint being threaded connection, and described nozzle comprises nozzle body and the nozzle bore that is located at nozzle body front end, and the centre of described nozzle body is embedded with dismountable spiral runner blade.
As preferably, described air distributor comprises interior ring air channel and outer shroud air channel, and described outer shroud air channel is provided with nitrogen inlet, and outer shroud air channel is relatively little away from the caliber of a side of nitrogen inlet; Between the inner side in described interior ring air channel and the outside in outer shroud air channel, by a plurality of air flues, be communicated with.When the nitrogen of 5～30 ℃ pass through the nitrogen inlet of airflow-distribution board, can make nitrogen and formaldehyde can evenly fully contact the uniform paraformaldehyde product of acquisition particle diameter by effective dispersed nitrogen.
As preferably, described nozzle bore comprises bellmouth section and straight hole section, and the outer face of the nozzle bore cambered surface that is indent.
As preferably, the cambered surface of the outer face of described nozzle bore is stepped cambered surface.
As preferably, the height of the ladder of described stepped cambered surface is 1～2mm.
Further improve, described nozzle is vertical setting with pipe joint, and forms round corner section.
Beneficial effect: compared with prior art, the present invention has the following advantages: formalin can be sprayed at a high speed to the vaporific formaldehyde that forms high dispersive, and cooling along direction contact heat-exchanging with nitrogen, air distributor can at utmost disperse nitrogen simultaneously, nitrogen can fully be contacted with vaporific formaldehyde, obtain the uniform paraformaldehyde target product of particle diameter.
Accompanying drawing explanation
Fig. 1 is the structural representation of mist projection granulating tower of the present invention;
The structural representation of airflow-distribution board in Fig. 2 mist projection granulating tower of the present invention;
The structural representation of Fig. 3 distribution showerhead of the present invention;
Fig. 4 is the partial enlarged drawing of a-quadrant in Fig. 3.
Wherein, tower body 51, air distributor 52, interior ring air channel 521, outer shroud air channel 522, nitrogen inlet 523, air flue 524, shower nozzle 53, nozzle 531, pipe joint 532, nozzle body 533, nozzle bore 534, spiral runner blade 535, outer face 536, stepped cambered surface 537.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment is only not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present invention.
As described in Figure 1, a kind of mist projection granulating tower of producing for paraformaldehyde, this mist projection granulating tower is tubular, lower bottom part is conical head, it mainly comprises tower body, be located at tower body bottom products export, be located at the formalin entrance at tower body top and be located at the nitrogen inlet on tower body top, described nitrogen inlet is connected with air distributor; Tower body inside also arranges shower nozzle, this shower nozzle is mainly comprised of nozzle and pipe joint, wherein nozzle comprises nozzle body and the nozzle bore that is located at body front end, nozzle body is rectangular shaped, tail end is connected with pipe joint screw thread, nozzle body center is annular channel, is embedded spiral runner blade in this passage; Nozzle bore comprises the straight hole section of conical section and aperture simultaneously, thereby makes the formalin of flowing through form High Rotation Speed dispersing morphology, ejects and forms the vaporific of high dispersive, and spiral runner blade employing is embedded mode can be for convenience detach.Simultaneously, we further improve nozzle bore, the outer face of nozzle bore is designed to the stepped cambered surface of indent, the height of ladder is 1mm, and ladder designs for fillet, make formalin spray at a high speed along curved end and form the fluffy shape oblique from nozzle bore, the nitrogen that in the time of favourable dispersion and granulation tower top enters forms strong convection heat exchange.As preferred version, curved end is designed to step-likely can effectively improve atomizing effect, thereby to carry out heat exchange cooling with nitrogen.In addition, nozzle body adopts quarter bend dihedral to become, make the formalin entering from pipe joint form around the corner mixed flow, it while avoiding formalin to enter, is laminar flow, because when rectilinear duct length reaches one regularly, the liquid of flowing through can form relatively static upper, thereby relative mobile tailing off improved the polymerization risk of formaldehyde.
In order more effectively to disperse formaldehyde, with the supporting all right coupling stabilized pressure pump of mist projection granulating tower, combining of shower nozzle by this stabilized pressure pump and above-mentioned special construction, can effective depth disperse hydrojet that the specific area of formaldehyde polymer is improved greatly, the degree of polymerization of the paraformaldehyde that final freeze drying obtains is in 11 left and right, and particle size distribution is even.Operating condition in mist projection granulating tower is 5～30 ℃, vacuumize under condition and carry out, nitrogen is sent into from the nitrogen inlet on tower body top, through stream of nitrogen gas distribution grid, the nitrogen of low temperature is sent into the abundant contact heat-exchanging of vaporific formalin cooling, and with the formaldehyde spray film concurrent of shower nozzle ejection, thereby avoid reflux type to form disturbance and end stream causes the local polymerization of paraformaldehyde excessive.As improvement project, described air distributor comprises interior ring air channel and outer shroud air channel, and described outer shroud air channel is provided with nitrogen inlet, and outer shroud air channel is relatively little away from the caliber of a side of nitrogen inlet; Between the inner side in described interior ring air channel and the outside in outer shroud air channel, by a plurality of air flues, be communicated with.
Claims (6)
1. a spray granulating and drying tower, it is characterized in that: comprise tower body, air distributor, be located at tower body bottom products export, be located at the formalin entrance at tower body top and be located at the nitrogen inlet on tower body top, described nitrogen inlet is connected with air distributor; Tower body inside also arranges shower nozzle, and described shower nozzle comprises nozzle and the pipe joint being threaded connection, and described nozzle comprises nozzle body and the nozzle bore that is located at nozzle body front end, and the centre of described nozzle body is embedded with dismountable spiral runner blade.
2. spray granulating and drying tower according to claim 1, is characterized in that: described air distributor comprises interior ring air channel and outer shroud air channel, and described outer shroud air channel is provided with nitrogen inlet, and outer shroud air channel is relatively little away from the caliber of a side of nitrogen inlet; Between the inner side in described interior ring air channel and the outside in outer shroud air channel, by a plurality of air flues, be communicated with.
3. spray granulating and drying tower according to claim 1, is characterized in that: described nozzle bore comprises bellmouth section and straight hole section, and the outer face of the nozzle bore cambered surface that is indent.
4. spray granulating and drying tower according to claim 3, is characterized in that: the cambered surface of the outer face of described nozzle bore is stepped cambered surface.
5. spray granulating and drying tower according to claim 4, is characterized in that: the height of the ladder of described stepped cambered surface is 1～2mm.
6. spray granulating and drying tower according to claim 5, is characterized in that: described nozzle is vertical setting with pipe joint, and forms round corner section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410346752.3A CN104174326B (en) | 2014-07-21 | 2014-07-21 | A kind of spray granulating and drying tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410346752.3A CN104174326B (en) | 2014-07-21 | 2014-07-21 | A kind of spray granulating and drying tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104174326A true CN104174326A (en) | 2014-12-03 |
| CN104174326B CN104174326B (en) | 2017-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410346752.3A Active CN104174326B (en) | 2014-07-21 | 2014-07-21 | A kind of spray granulating and drying tower |
Country Status (1)
| Country | Link |
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| CN (1) | CN104174326B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106829877A (en) * | 2017-03-06 | 2017-06-13 | 杨松 | One kind prepares insoluble sulfur mist projection granulating tower |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036891A (en) * | 1975-12-29 | 1977-07-19 | Moller Jens C T | Process for preparing paraformaldehyde |
| US6076744A (en) * | 1998-12-23 | 2000-06-20 | Spraying Systems Co. | Full cone spray nozzle |
| CN1560102A (en) * | 2004-02-26 | 2005-01-05 | 四川大学 | Preparation process for polymeric formol of high formol content |
| CN2804753Y (en) * | 2005-12-12 | 2006-08-09 | 郑州轻工业学院 | Air intaking and distributing ring device of spray-drying appts |
| CN102443121A (en) * | 2011-10-31 | 2012-05-09 | 江苏恒茂机械制造有限公司 | Production technology of paraformaldehyde |
| CN203095890U (en) * | 2013-02-01 | 2013-07-31 | 济南罗门哈斯生物技术有限公司 | Trace element water-soluble fertilizer liquid airflow spray drying tower |
| CN203990513U (en) * | 2014-07-21 | 2014-12-10 | 江苏凯茂石化科技有限公司 | A kind of spray granulating and drying tower |
-
2014
- 2014-07-21 CN CN201410346752.3A patent/CN104174326B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036891A (en) * | 1975-12-29 | 1977-07-19 | Moller Jens C T | Process for preparing paraformaldehyde |
| US6076744A (en) * | 1998-12-23 | 2000-06-20 | Spraying Systems Co. | Full cone spray nozzle |
| CN1560102A (en) * | 2004-02-26 | 2005-01-05 | 四川大学 | Preparation process for polymeric formol of high formol content |
| CN2804753Y (en) * | 2005-12-12 | 2006-08-09 | 郑州轻工业学院 | Air intaking and distributing ring device of spray-drying appts |
| CN102443121A (en) * | 2011-10-31 | 2012-05-09 | 江苏恒茂机械制造有限公司 | Production technology of paraformaldehyde |
| CN203095890U (en) * | 2013-02-01 | 2013-07-31 | 济南罗门哈斯生物技术有限公司 | Trace element water-soluble fertilizer liquid airflow spray drying tower |
| CN203990513U (en) * | 2014-07-21 | 2014-12-10 | 江苏凯茂石化科技有限公司 | A kind of spray granulating and drying tower |
Non-Patent Citations (1)
| Title |
|---|
| 李峰: "《甲醛及其衍生物》", 30 September 2006, article "喷雾干燥", pages: 92 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106829877A (en) * | 2017-03-06 | 2017-06-13 | 杨松 | One kind prepares insoluble sulfur mist projection granulating tower |
| CN106829877B (en) * | 2017-03-06 | 2018-10-23 | 杨松 | It is a kind of to prepare insoluble sulfur mist projection granulating tower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104174326B (en) | 2017-09-01 |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: He Jianzu Inventor before: Xiang Jiayong Inventor before: Ye Zimao Inventor before: Zhang Hongwei Inventor before: Guo Bing |
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| TA01 | Transfer of patent application right | ||
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Effective date of registration: 20170509 Address after: Jinxi road Binhu District 214000 Jiangsu city of Wuxi province No. 100 Applicant after: WUXI ZHIGUI TECHNOLOGY CO., LTD. Address before: No. 58 Henghua Technology Park 214000 Jiangsu province Binhu District of Wuxi City Xiu Xi Lu (big river No. 50 South Gate) Applicant before: Jiangsu Kaimao Chemical Technology Co., Ltd. |
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Effective date of registration: 20180125 Address after: 214000 K-PARK Service Center No. 3, No. 50, No. 50, embroidery Creek Road, Binhu District, Jiangsu Province, Southeast of 4 Patentee after: Jiangsu Dalton Petrochemical Technology Co., Ltd. Address before: Jinxi road Binhu District 214000 Jiangsu city of Wuxi province No. 100 Patentee before: WUXI ZHIGUI TECHNOLOGY CO., LTD. |