CN101874938A - Forced circulation continuous crystallization system with mechanical vapor recompression function - Google Patents
Forced circulation continuous crystallization system with mechanical vapor recompression function Download PDFInfo
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- 238000002425 crystallisation Methods 0.000 title claims abstract description 19
- 230000008025 crystallization Effects 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000009833 condensation Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 9
- 238000007599 discharging Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
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Abstract
带机械蒸汽再压缩的强制循环连续结晶系统,涉及一种连续结晶系统,包括结晶器,还包括压缩机、加热器,所述结晶器底部连接循环管,所述循环管的另一端连接循环泵的进料口,所述循环泵的出料口连接出料管,出料管的另一端连接出料泵的进料口,出料泵的出料口连接成品罐,结晶器顶部通过管道与压缩机进口连接,下封头与循环管相连,下封头一侧连接进料管,进料管上设有球阀和进料泵,进料管另一端与原料罐相连;上封头通过管道与结晶器相连,加热器外设置壳程,所述壳程通过管道与压缩机出口连通,所述加热器连接抽空管道,所述壳程连接冷凝水排出管。本发明能够满足连续进料和排料的结晶生产要求,采用压缩机收集二次蒸汽,节约能源。
The forced circulation continuous crystallization system with mechanical vapor recompression relates to a continuous crystallization system, including a crystallizer, a compressor, and a heater. The bottom of the crystallizer is connected to a circulation pipe, and the other end of the circulation pipe is connected to a circulation pump The feed port of the circulating pump is connected to the discharge pipe, the other end of the discharge pipe is connected to the feed port of the discharge pump, the discharge port of the discharge pump is connected to the finished product tank, and the top of the crystallizer is connected to the The inlet of the compressor is connected, the lower head is connected to the circulation pipe, one side of the lower head is connected to the feed pipe, the feed pipe is equipped with a ball valve and a feed pump, and the other end of the feed pipe is connected to the raw material tank; the upper head is passed through the pipeline It is connected with the crystallizer, and a shell side is arranged outside the heater, and the shell side is connected with the outlet of the compressor through a pipeline, the heater is connected with an evacuation pipeline, and the shell side is connected with a condensed water discharge pipe. The invention can meet the crystallization production requirement of continuous feeding and discharging, adopts a compressor to collect secondary steam, and saves energy.
Description
技术领域technical field
本发明涉及一种连续结晶系统,具体为一种节能的连续结晶器,即带机械蒸汽再压缩的强制循环连续结晶系统。The invention relates to a continuous crystallization system, in particular to an energy-saving continuous crystallizer, that is, a forced circulation continuous crystallization system with mechanical steam recompression.
背景技术Background technique
传统的结晶设备是先将待结晶的溶液装入结晶器,然后使设备运行一段时间后,当溶液循环浓缩达到一定结晶量时,在打开出料泵排出晶浆,等晶浆排空后再次打开进料阀装入原液,重复上述过程。这就使生产间隙进行无法连续生产。另外,传统的结晶设备通常是将结晶器产生的二次蒸汽直接排出或是经冷凝设备冷凝后排走。这样不仅浪费了二次蒸汽的潜热,浪费了能源,还得为冷凝二次蒸汽增加一套冷凝设备,既增加了投资又不环保和经济。还有传统的结晶设备一般是在常压下蒸发的,这对有些需要低温蒸发的热敏性大的物料来说是不利的。为此,即能连续生产又可以节能而且还可以低温蒸发的结晶器成为一个研究的热点。The traditional crystallization equipment is to first put the solution to be crystallized into the crystallizer, and then run the equipment for a period of time. When the solution is concentrated and concentrated to a certain crystallization amount, turn on the discharge pump to discharge the crystal slurry, and wait for the crystal slurry to be emptied again. Open the feed valve to load the stock solution, repeat the above process. This makes continuous production impossible for production gaps. In addition, traditional crystallization equipment usually discharges the secondary steam generated by the crystallizer directly or discharges it after being condensed by a condensing device. This not only wastes the latent heat of the secondary steam and wastes energy, but also has to add a set of condensing equipment for condensing the secondary steam, which not only increases investment but is not environmentally friendly and economical. Also, traditional crystallization equipment generally evaporates under normal pressure, which is unfavorable for some heat-sensitive materials that require low-temperature evaporation. For this reason, crystallizers that can produce continuously, save energy and evaporate at low temperature have become a research hotspot.
发明内容Contents of the invention
本发明的目的是:提供一种能够连续进料、出料和能够节约能源并且可以在较低温度下蒸发的连续结晶器。The purpose of the present invention is to provide a continuous crystallizer capable of continuous feeding and discharging, saving energy and evaporating at a lower temperature.
本发明的目的是这样实现的:带机械蒸汽再压缩的强制循环连续结晶系统,包括结晶器,还包括压缩机、设置有下封头(28)和上封头(29)的加热器,所述结晶器(1)底部连接循环管(16),所述循环管的另一端连接循环泵(11)的进料口,所述循环泵的出料口连接出料管(17),出料管(17)的另一端连接出料泵(10)的进料口,出料泵(10)的出料口连接成品罐(9),结晶器顶部通过管道(27)与压缩机进口连接,加热器的下封头(28)与循环管(16)相连,下封头一侧连接进料管(30),进料管上设有球阀(31)和进料泵(12),进料管另一端与原料罐相连;加热器的上封头通过管道(18)与结晶器相连,加热器外设置壳程,所述壳程通过管道(19)与压缩机(2)出口连通,所述加热器连接抽空管道(20),所述壳程连接冷凝水排出管(21)。The object of the present invention is achieved like this: the forced circulation continuous crystallization system with mechanical vapor recompression, comprises crystallizer, also comprises compressor, is provided with the heater of lower sealing head (28) and upper sealing head (29), so The bottom of the crystallizer (1) is connected to the circulation pipe (16), the other end of the circulation pipe is connected to the feed port of the circulation pump (11), and the discharge port of the circulation pump is connected to the discharge pipe (17). The other end of the pipe (17) is connected to the feed port of the discharge pump (10), and the discharge port of the discharge pump (10) is connected to the finished product tank (9), and the top of the crystallizer is connected to the compressor inlet through a pipeline (27). The lower head (28) of the heater is connected to the circulation pipe (16), and one side of the lower head is connected to the feed pipe (30). The feed pipe is provided with a ball valve (31) and a feed pump (12). The other end of the pipe is connected with the raw material tank; the upper head of the heater is connected with the crystallizer through a pipeline (18), and a shell side is arranged outside the heater, and the shell side is communicated with the outlet of the compressor (2) through a pipeline (19). The heater is connected to the evacuation pipe (20), and the shell side is connected to the condensed water discharge pipe (21).
本发明所提供的设备能够满足连续进料和排料的结晶生产要求,采用压缩机收集二次蒸汽,重复利用了二次蒸汽的潜热,节约了能源,省却了冷凝设备,减少了冷却水的用量,降低了企业的成本,增加了企业收益,采用水循环真空泵来抽出不凝性气体和维持系统内的真空度,保证溶液在较低的饱和温度下沸腾蒸发。The equipment provided by the present invention can meet the crystallization production requirements of continuous feeding and discharging, adopts the compressor to collect the secondary steam, reuses the latent heat of the secondary steam, saves energy, saves the condensing equipment, and reduces the consumption of cooling water. The dosage reduces the cost of the enterprise and increases the income of the enterprise. The water circulation vacuum pump is used to pump out the non-condensable gas and maintain the vacuum in the system to ensure that the solution boils and evaporates at a lower saturation temperature.
为了维持系统的真空度,所述抽空管道上依次设有平衡管(22)、球阀(5)和真空泵(6),所述平衡管上设置球阀(23),平衡管末端与冷凝罐(24)相连。In order to maintain the vacuum degree of the system, a balance pipe (22), a ball valve (5) and a vacuum pump (6) are successively arranged on the described evacuation pipe, a ball valve (23) is arranged on the described balance pipe, and the end of the balance pipe is connected with the condensation tank (24 ) connected.
为了将蒸气冷凝后的冷凝水排出,所述冷凝水排出管上依次设有视管(7)和球阀(25),冷凝水排出管末端与冷凝罐相连,冷凝罐底部设有排空管,排空管上依次设有球阀(26)和排空泵(8)。In order to discharge the condensed water after steam condensation, the condensed water discharge pipe is provided with a sight tube (7) and a ball valve (25) in sequence, the end of the condensed water discharge pipe is connected with the condensation tank, and the bottom of the condensation tank is provided with an emptying pipe. A ball valve (26) and an emptying pump (8) are successively arranged on the emptying pipe.
为了保持压力平衡,所述的压缩机为罗茨式压缩机,压缩机的进、出口设有旁通管(32),旁通管上设有球阀(3)。In order to maintain pressure balance, the compressor is a Roots compressor, the inlet and outlet of the compressor are provided with a bypass pipe (32), and the bypass pipe is provided with a ball valve (3).
作为本发明的进一步改进,所述的结晶器顶部有挡板(36),进结晶器的管道(18)在结晶器内设置有一弯管(33)深向结晶器中线并沿中线向上一段,在末端设有一锥形漏斗(37),该结构可以控制结晶颗粒的大小,满足生产要求。As a further improvement of the present invention, there is a baffle plate (36) at the top of the crystallizer, and the pipeline (18) entering the crystallizer is provided with an elbow (33) deep to the center line of the crystallizer and upwards along the center line, A conical funnel (37) is arranged at the end, and this structure can control the size of crystal particles to meet production requirements.
为了将原料预加热,所述的原料罐内设有热交换器(15)。In order to preheat the raw material, a heat exchanger (15) is arranged inside the raw material tank.
附图说明Description of drawings
图1为本发明的一种结构示意图。Fig. 1 is a kind of structure diagram of the present invention.
其中,1-结晶器、2-压缩机、3-球阀、4-加热器、5-球阀、6-真空泵、7-视管、8-排空泵、9-成品罐、10-排料泵、11-循环泵、12-进料泵、13-流量计、14-原料罐、15-热交换器、16-循环管、17-出料管、18-管道、19-管道、20-抽空管道、21-凝水排出管、22-平衡管、23-球阀、24-冷凝罐、25-球阀、26-球阀、27-管道、28-下封头、29-上封头、30-进料管、31-球阀、32-旁通管、33-壳程。Among them, 1-crystallizer, 2-compressor, 3-ball valve, 4-heater, 5-ball valve, 6-vacuum pump, 7-sight tube, 8-emptying pump, 9-finished product tank, 10-discharging pump , 11-circulation pump, 12-feed pump, 13-flow meter, 14-raw material tank, 15-heat exchanger, 16-circulation pipe, 17-outlet pipe, 18-pipeline, 19-pipeline, 20-evacuation Pipeline, 21-condensate discharge pipe, 22-balance pipe, 23-ball valve, 24-condensation tank, 25-ball valve, 26-ball valve, 27-pipeline, 28-lower head, 29-upper head, 30-inlet Material pipe, 31-ball valve, 32-bypass pipe, 33-shell side.
具体实施方式Detailed ways
如图1所示,带机械蒸汽再压缩的强制循环连续结晶器,包括结晶器1、压缩机2,加热器4,结晶器1底部设置循环管16,循环管16上设置循环泵11,循环泵11后设有出料管17,出料管17后面设有出料泵10,出料管17末端设有成品罐9,结晶器1顶部通过管道27与压缩机2进口相连,加热器4下部设置下封头28上部设置上封头29,下封头28底部与循环管16相连,下封头28一侧有进料管30,进料管30上设有流量计13、球阀31和进料泵12,进料管30末端与原料罐14相连,上封头29通过管道18与结晶器1相连,加热器4的壳程33通过管道19与压缩机2出口相连,加热器4的壳程33底部设有抽空管道20和冷凝水排出管21,抽空管道20上设有平衡管22、球阀5和真空泵6,平衡管22上设有球阀23,平衡管22末端与冷凝罐24相连,冷凝水排出管21上设有视管7和球阀25,冷凝水排出管21末端与冷凝罐24相连,冷凝罐24底部设有排空管,排空管上有球阀(26)和排空泵(8)。As shown in Figure 1, the forced circulation continuous crystallizer with mechanical vapor recompression includes a
原料罐14内的料液经热交换器15加热预热到沸点后连续的进入加热器4受热蒸发,被加热的料液送入结晶器1分离后,浓缩了的料液下落到结晶器1的底部形成晶浆,晶浆通过循环管16和循环泵11一部分进入出料管17经排料泵10将晶浆连续的排到成品罐9,另一部分继续参与循环。结晶器1内分离出的二次蒸汽经管道27送到压缩机2,经压缩机2压缩升温、升压后送到加热器管程放出潜热加热换热管35内的溶液。冷凝下来的凝水经凝水排出管21排到冷凝罐24,凝水管下部装有排空管,排空管上设有球阀26和排空泵8,冷凝罐满时可通过排空泵将凝水排出。压缩机的进、出口有一旁通管32相连,旁通管上设有一球阀3,这样可以保护压缩机在启动和停止时不因负荷过高而超载。为使料液在低温下蒸发,系统的真空度维持和不凝性气体的排出由抽空管20上的真空泵6完成,在真空泵前的抽空管上设有球阀5用来控制系统的真空度,在抽空管球阀前设有一支连接冷凝罐的平衡管22,平衡管上设有球阀23。The feed liquid in the
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Cited By (8)
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CN102060408A (en) * | 2010-12-07 | 2011-05-18 | 华电水处理技术工程有限公司 | Wastewater evaporating process and device system |
CN102070272A (en) * | 2010-12-07 | 2011-05-25 | 华电水处理技术工程有限公司 | Wastewater evaporation concentration process and device system |
CN102343162A (en) * | 2011-07-20 | 2012-02-08 | 常州大学 | Energy-saving evaporating process and equipment for L-phenylalanine brine solution |
CN102407029A (en) * | 2011-10-17 | 2012-04-11 | 宜兴市格兰特干燥浓缩设备有限公司 | Evaporated crystallization device |
CN102772907A (en) * | 2012-06-29 | 2012-11-14 | 常州环生科创石墨设备有限公司 | Continuous extracting, crystalizing and evaporating equipment |
CN103908788A (en) * | 2012-12-31 | 2014-07-09 | 中国科学院理化技术研究所 | MVR heat pump evaporation system |
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- 2009-12-07 CN CN2009102586026A patent/CN101874938A/en active Pending
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102060408A (en) * | 2010-12-07 | 2011-05-18 | 华电水处理技术工程有限公司 | Wastewater evaporating process and device system |
CN102070272A (en) * | 2010-12-07 | 2011-05-25 | 华电水处理技术工程有限公司 | Wastewater evaporation concentration process and device system |
CN102060408B (en) * | 2010-12-07 | 2012-06-06 | 华电水处理技术工程有限公司 | Wastewater evaporating process and device system |
CN102343162A (en) * | 2011-07-20 | 2012-02-08 | 常州大学 | Energy-saving evaporating process and equipment for L-phenylalanine brine solution |
CN102343162B (en) * | 2011-07-20 | 2014-04-09 | 常州大学 | Energy-saving evaporating process and equipment for L-phenylalanine brine solution |
CN102407029A (en) * | 2011-10-17 | 2012-04-11 | 宜兴市格兰特干燥浓缩设备有限公司 | Evaporated crystallization device |
CN102772907A (en) * | 2012-06-29 | 2012-11-14 | 常州环生科创石墨设备有限公司 | Continuous extracting, crystalizing and evaporating equipment |
CN103908788A (en) * | 2012-12-31 | 2014-07-09 | 中国科学院理化技术研究所 | MVR heat pump evaporation system |
CN103908788B (en) * | 2012-12-31 | 2015-12-23 | 中国科学院理化技术研究所 | MVR heat pump evaporation system |
CN103768808B (en) * | 2014-01-23 | 2015-09-09 | 南京航空航天大学 | Partial vapor recompression evaporation concentration system and method |
CN106693414A (en) * | 2017-01-06 | 2017-05-24 | 南京航空航天大学 | Heat-mass co-transfer evaporation and crystallization system and working method thereof |
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Application publication date: 20101103 |