CN201106971Y - Constant temperature freezing apparatus for reaction still - Google Patents

Abstract

The utility model discloses a constant temperature freezing device for a reaction vessel, and the freezing device comprises a cold source circulation system, a liquid ammonia circulation system, a heat source circulation system as well as a low temperature reaction vessel, wherein, the liquid ammonia circulation system comprises a heat exchanger, an ammonia bottle and a liquid ammonia storage tank, the ammonia bottle and the liquid ammonia storage tank are connected with the heat exchanger; the heat source circulation system comprises a constant temperature secondary refrigerant storage tank; the low temperature reaction vessel is communicated with the liquid ammonia storage tank, and the vessel wall of the low temperature reaction vessel is provided with a reaction vessel jacket; the cold source circulation system comprises a refrigeration unit, a low temperature secondary refrigerant storage tank as well as a plurality of cold source control and connection pipeline loops which are connected with the low temperature secondary refrigerant storage tank, and the cold source control and connection pipeline loops respectively pass through the refrigeration unit, the heat exchanger, the liquid ammonia storage tank and the reaction vessel jacket; the reaction vessel jacket is also communicated with the constant temperature secondary refrigerant storage tank through heat source control and connection pipeline loops. The constant temperature freezing device is designed aiming at the industrial requirement that the reaction vessel in the processing procedures is under the constant low temperature, thereby ensuring the precise and timely maintenance of the low temperature state required by the material in the reaction vessel.

Description

Reactor constant temperature freezer

Technical field

The utility model relates to a kind of reactor constant temperature freezer.

Background technology

In order to satisfy requirements such as production technology and scientific research, the part machining process must constantly carry out when requiring material in reactor chemical reaction to take place at low temperatures, could satisfy the stable of material condition, obtains qualified product.The low temperature control method of this type of reactor is that this technical process environment is freezed at present, keeps environment to be in low-temperature condition by gas communication; Perhaps take away the heat realization temperature control of reactor surrounding air by the refrigerating medium of circulation.But like this, can not temperature control reach on the technology, also can can't meet the demands because of the reaction heat of material in reactor can not in time shift to the requirement of temperature constant.Simultaneously, requirement can not the long-term existence refrigerating medium in the reactor, even low temperature can not occur in some manufacturing technique requirent reactor, and promptly temperature wants within the specific limits constant.So above-mentioned cryogenic refrigerating system can not reach technological requirement.

Summary of the invention

The utility model purpose provides a kind of reactor constant temperature freezer, and it is for requiring the reactor in the machining process to be in constant low temperature design at industrial, to guarantee accurately to keep timely the low-temperature condition of material in reactor requirement.

The technical solution of the utility model is: a kind of reactor constant temperature freezer, described reactor constant temperature freezer comprises the low-temperature receiver circulatory system, the liquefied ammonia circulatory system and the thermal source circulatory system, the described low-temperature receiver circulatory system comprises freezing unit, low temperature refrigerating medium storage tank and some low-temperature receiver control connection pipeline loops that is connected with low temperature refrigerating medium storage tank, described low-temperature receiver control connection pipeline loop includes four, and wherein the first low-temperature receiver control connection pipeline loop is through freezing unit; Ammonia bottle and liquefied ammonia storage tank that the described liquefied ammonia circulatory system comprises heat exchanger and links to each other with heat exchanger respectively, described heat exchanger also link to each other with the second low-temperature receiver control connection pipeline loop, and described liquefied ammonia storage tank links to each other with the 3rd low-temperature receiver control connection pipeline loop; The described thermal source circulatory system comprises normal temperature refrigerating medium storage tank; Described reactor constant temperature freezer also comprises the low-temp reaction still, described low-temp reaction still is connected with the liquefied ammonia storage tank, the still wall of described low-temp reaction still is provided with reacting kettle jacketing, and described reacting kettle jacketing is communicated with the 4th low-temperature receiver control connection pipeline loop, thermal source control connection pipeline loop with low temperature refrigerating medium storage tank and normal temperature refrigerating medium storage tank respectively.

The further technical scheme of the utility model is: a kind of reactor constant temperature freezer, described reactor constant temperature freezer comprises the low-temperature receiver circulatory system, the liquefied ammonia circulatory system and the thermal source circulatory system, the described low-temperature receiver circulatory system comprises freezing unit, low temperature refrigerating medium storage tank and some low-temperature receiver control connection pipeline loops that is connected with low temperature refrigerating medium storage tank, described low-temperature receiver control connection pipeline loop includes four, and wherein the first low-temperature receiver control connection pipeline loop is through freezing unit; Ammonia bottle and liquefied ammonia storage tank that the described liquefied ammonia circulatory system comprises heat exchanger and links to each other with heat exchanger respectively, described heat exchanger also link to each other with the second low-temperature receiver control connection pipeline loop, and described liquefied ammonia storage tank links to each other with the 3rd low-temperature receiver control connection pipeline loop; The described thermal source circulatory system comprises normal temperature refrigerating medium storage tank; Described reactor constant temperature freezer also comprises the low-temp reaction still, described low-temp reaction still is connected with the liquefied ammonia storage tank, the still wall of described low-temp reaction still is provided with reacting kettle jacketing, and described reacting kettle jacketing is communicated with the 4th low-temperature receiver control connection pipeline loop, thermal source control connection pipeline loop with low temperature refrigerating medium storage tank and normal temperature refrigerating medium storage tank respectively; The described thermal source circulatory system also comprises the coil pipe heat-exchange system loop that has blower fan that is communicated with normal temperature refrigerating medium storage tank; Described coil pipe heat-exchange system loop also comprises the heating wire of heating refrigerating medium capable of circulation; Described refrigerating medium is the ethanol refrigerating medium; Described heat exchanger is a plate type heat exchanger.

The utility model advantage is:

1. the utility model general structure is simple, cost is low, can effectively use multistage refrigerating medium circulation, utilize liquefied ammonia to finish refrigeration to environment in the reactor, and after reaction is finished, utilize the thermal source circulatory system to make the liquefied ammonia gasification in the reactor discharge, can take away the heat that produces in the course of reaction quickly and effectively, can satisfy again in the reactor can not the long-term existence refrigerating medium requirement.

2. the utility model can accurately be controlled the temperature constant state of technical process, has satisfied technological requirement.

Description of drawings

Fig. 1 is a structure schematic flow sheet of the present utility model.

Wherein: 1 freezing unit; 2 low temperature refrigerating medium storage tanks; 3 ammonia bottles; 4 heat exchangers; 5 liquefied ammonia storage tanks; 6 low-temp reaction stills; 7 normal temperature refrigerating medium storage tanks; 8 blower fans; 9 coil pipe heat-exchange systems; 10 low-temperature receiver control connection pipeline loops; 101 first low-temperature receiver control connection pipeline loops; 102 second low-temperature receiver control connection pipeline loops; 103 the 3rd low-temperature receiver control connection pipeline loops; 104 the 4th low-temperature receiver control connection pipeline loops; 11 thermal source control connection pipeline loops; 12 heating wire.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment: as shown in Figure 1, a kind of reactor constant temperature freezer comprises the low-temperature receiver circulatory system, the liquefied ammonia circulatory system and the thermal source circulatory system.

The described low-temperature receiver circulatory system comprises freezing unit 1, low temperature refrigerating medium storage tank 2 and four low-temperature receiver control connection pipeline loops 10 that are connected with low temperature refrigerating medium storage tank 2, described low-temperature receiver control connection pipeline loop 10 includes four, their outlet temperature unanimity, and the temperature difference of returning.Wherein the first low-temperature receiver control connection pipeline loop 101 carries out heat exchange through freezing unit 1 with cold-producing medium, and the refrigerant temperature that loops back in the low temperature refrigerating medium storage tank 2 is reduced.

The described liquefied ammonia circulatory system comprises heat exchanger 4 and ammonia bottle 3 that links to each other with heat exchanger 4 respectively and liquefied ammonia storage tank 5, described heat exchanger 4 also links to each other with the second low-temperature receiver control connection pipeline loop 102, described liquefied ammonia storage tank 5 links to each other with the 3rd low-temperature receiver control connection pipeline loop 103, wherein the second low-temperature receiver control connection pipeline loop 102 is a cooling ammonia, in a single day purpose is to make ammonia be cooled to-40 ℃ from environment temperature to fail to reach this design temperature, just implement to continue to cool off by the 3rd low-temperature receiver control connection pipeline loop 103.

The described thermal source circulatory system comprises normal temperature refrigerating medium storage tank 7 and thermal source control connection pipeline loop 11.

Described reactor constant temperature freezer also comprises low-temp reaction still 6, described low-temp reaction still 6 is connected with liquefied ammonia storage tank 5, the still wall of described low-temp reaction still 6 is provided with reacting kettle jacketing, and described reacting kettle jacketing is communicated with the 4th low-temperature receiver control connection pipeline loop 104, thermal source control connection pipeline loop 11 with low temperature refrigerating medium storage tank 2 and normal temperature refrigerating medium storage tank 7 respectively.

Described refrigerating medium is the ethanol refrigerating medium; Described heat exchanger 4 is a plate type heat exchanger.

The described thermal source circulatory system also comprises coil pipe heat-exchange system 9 loops that have blower fan 8 that are communicated with normal temperature refrigerating medium storage tank 7; Described coil pipe heat-exchange system 9 loops also comprise the heating wire 12 of heating refrigerating medium capable of circulation.When heat that the hot ethanol refrigerating medium under the normal temperature is not enough to provide enough, can in the thermal source circulatory system, open another coil pipe heat-exchange system 9 loops, road, to promote hot ethanol refrigerating medium to the heating efficiency in the still, if still be not enough to satisfy heating condition, then controlledly open heating wire 12 again, make hydronic hot ethanol refrigerating medium provide more heats to reactor.

In addition, also comprise stop valve, circulation power pump, pressure indicator, safety relief valve and the temp probe etc. that are used for sensing control in the reactor constant temperature freezer.

Operation principle of the present utility model is: freezing unit 1 utilizes fluorine Lyons circulation of internal system, freezes, and by the pump circulation, the ethanol in the cold ethanol storage tank is reduced to-75 ℃ again.When the reactor in the technical process 6 needed low temperature to react, heat source system was closed, and circulation can only be another road ethanol refrigerating medium that cold source system provides in the reacting kettle jacketing.Liquefied ammonia circulatory system mesohigh liquefied ammonia is exported from ammonia bottle 3, gasification when entering plate type heat exchanger 4, at this moment the cold ethanol in the low temperature refrigerating medium storage tank 2 carries out heat exchange by the low-temperature receiver control connection pipeline loop 10 that links to each other with plate type heat exchanger 4 at plate type heat exchanger 4 places and gaseous ammonia, makes ammoniacal liquor formation normal pressure liquefied ammonia and enter liquefied ammonia storage tank 5; Liquefied ammonia in liquefied ammonia storage tank 5 carries out heat exchange by the low-temperature receiver control connection pipeline loop 10 with liquefied ammonia storage tank 5 places with cold ethanol, further lowers the temperature and keeps liquid state; This low-temperature liquid ammonia enters in the low-temp reaction still 6 afterwards, material in the production also is located in this low-temp reaction still 6, carry out chemical reaction, liquefied ammonia is filled in around the reactant, directly absorption reaction heat prevents temperature fluctuation, this moment because of the liquefied ammonia of endothermic heat of reaction under normal pressure with chuck in cold ethanol carry out heat exchange, thereby reaction heat is taken away, kept the liquefied ammonia liquid condition.When reaction finishes, the ethanol circulation that is provided by cold source system in the reacting kettle jacketing is closed, and heat source system is opened simultaneously, and hot ethanol participates in circulation, and starts suitable enhancing thermal source subsystem in good time and impel the liquefied ammonia gasification to separate.

Auxiliary cooling medium in the present embodiment---liquefied ammonia does not have tangible pipeline to constitute closed circuit, it only participates in material reaction, change of properties does not take place in itself, after material reaction finishes, by the vaporization emptying (in fact water collection) of being heated, so, concerning present embodiment, ammoniacal liquor in the ammonia bottle is constantly consuming, but the system that has can consider to take ammonia to recycle, and present embodiment is not obvious illustrates.In addition, the another one effect of ammonia is anti-oxidation.When discharging ammonia, mix wherein technological requirement thin up material for preventing remaining liquefied ammonia.

Specific embodiment:

Cold ethanol tank temperature-60～-70 ℃, ammoniacal liquor temperature-35～40 ℃, liquefied ammonia storage tank temperature-40 ℃, low-temp reaction still temperature-45 ℃, 0～-15 ℃ of normal temperature ethanol jar temperature.Operation after system starts is to be surveyed and control automatically by temp probe of arranging and pressure probe.

When unit running certain hour, the ethanol temperature is reduced to after-60 ℃, and the 2nd pump will be opened automatically.This pump startup is after 3 minutes, and the ammonia bottle can be opened to the pneumatic operated valve between the ammonification station, and liquefied ammonia enters in the liquefied ammonia storage tank automatically, and temperature is lowered down in the inflow process.

If it is too fast that liquefied ammonia flows, temperature is not lowered, and then pneumatic operated valve can cut out a few minutes, meets the requirements up to temperature.

Ammonia enters after the reactor, send cold pump to open automatically, remains on low-temperature condition to guarantee the temperature in the reactor.At this moment, dripping the heat that material produced can be taken away by cold ethanol at last.

Material dropping in the reactor finishes, and course of reaction stops; The insulating process of reactor also finishes.After having confirmed that temperature-fall period is all over, program can enter heating procedure automatically: freezing equipment all stops, and pump and self heat pump of heating reactor can be opened simultaneously, return the pneumatic ball valve of normal temperature ethanol jar and also open simultaneously.In addition, carry out the blower fan of heat exchange with air and also open, the cold in the reactor can be transferred in the atmosphere at last, and liquefied ammonia progressively is vaporized into gas, is absorbed by water.Normal temperature ethanol is in other material of heating, and it self temperature can sharply reduce, and when being lower than setting value, electrical heating wire can be devoted oneself to work, to guarantee vaporization rate.

The utility model general structure is simple, cost is low, can effectively use multistage refrigerating medium circulation, utilize liquefied ammonia to finish refrigeration to environment in the reactor, and after reaction is finished, utilize the thermal source circulatory system to make the liquefied ammonia gasification in the reactor discharge, can take away the heat that produces in the course of reaction quickly and effectively, can reach again in the reactor can not the long-term existence refrigerating medium requirement; And the temperature constant state that it can accurately control technical process has satisfied technological requirement.

Claims (5)

1. reactor constant temperature freezer, comprise low-temp reaction still (6), it is characterized in that: this device also comprises the low-temperature receiver circulatory system, the liquefied ammonia circulatory system and the thermal source circulatory system, the described low-temperature receiver circulatory system comprises freezing unit (1), low temperature refrigerating medium storage tank (2) and some low-temperature receiver control connection pipeline loops (10) that is connected with low temperature refrigerating medium storage tank (2), described low-temperature receiver control connection pipeline loop (10) includes four, and wherein the first low-temperature receiver control connection pipeline loop (101) is through freezing unit (1); The described liquefied ammonia circulatory system comprises ammonia bottle (3) and the liquefied ammonia storage tank (5) that is communicated with ammonia bottle (3), circulation duct between described ammonia bottle (3) and the liquefied ammonia storage tank (5) is through heat exchanger (4), the second low-temperature receiver control connection pipeline loop (102) is through described heat exchanger (4), and the 3rd low-temperature receiver control connection pipeline loop (103) is through described liquefied ammonia storage tank (5); The described thermal source circulatory system comprises normal temperature refrigerating medium storage tank (7) and the thermal source control connection pipeline loop (11) that is communicated with described normal temperature refrigerating medium storage tank (7); Described low-temp reaction still (6) is connected with liquefied ammonia storage tank (5), the still wall of described low-temp reaction still (6) is provided with reacting kettle jacketing, and described reacting kettle jacketing is communicated with the 4th low-temperature receiver control connection pipeline loop (104), thermal source control connection pipeline loop (11) with low temperature refrigerating medium storage tank (2) and normal temperature refrigerating medium storage tank (7) respectively.

2. reactor constant temperature freezer according to claim 1 is characterized in that: the described thermal source circulatory system also comprises coil pipe heat-exchange system (9) loop that has blower fan (8) that is communicated with normal temperature refrigerating medium storage tank (7).

3. reactor constant temperature freezer according to claim 2 is characterized in that: described coil pipe heat-exchange system (9) loop also comprises the heating wire (12) of heating refrigerating medium capable of circulation.

4. reactor constant temperature freezer according to claim 1 is characterized in that: described refrigerating medium is the ethanol refrigerating medium.

5. reactor constant temperature freezer according to claim 1 is characterized in that: described heat exchanger (4) is a plate type heat exchanger.