A device for measuring the heat carried by gas escape in a reaction calorimeter

Abstract

The utility model discloses a device for calculating the heat carried by gas escape of a reaction calorimeter, which belongs to the field of heat calculation technology, and comprises a circulating water tank body, wherein a reflux condenser is arranged inside the circulating water tank body, a constant temperature refrigeration device is arranged on the top of the circulating water tank body, and the constant temperature refrigeration device regulates the temperature inside the circulating water tank body, a circulating pump is arranged on one side of the reflux condenser, and the inlet and outlet ends of the circulating pump are respectively connected with a water inlet pipe and a water outlet pipe, wherein the water inlet pipe and the water outlet pipe are respectively fixed to the top and bottom ends of the reflux condenser, an electronic flow meter is installed on the water inlet pipe or the water outlet pipe, and a temperature sensor is arranged on the periphery of the reflux condenser. The device for calculating the heat carried by gas escape of a reaction calorimeter solves the problems that the heat consumed by gas overflow and condensation reflux can often be measured, resulting in a small reaction calorimetric measurement value, and the process danger cannot be accurately assessed.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat measurement, in particular to a device for measuring heat carried by gas escape of a reaction calorimeter. Background Art

[0002] For the fine chemical industry, the research and development of chemicals and industrial production require the completion of synthetic process research, and it is very important to obtain the exothermic or endothermic data of organic synthesis reactions. The acquisition and application of reaction heat data are of vital importance for studying the characteristics of reactions, reasonable process design, and conducting reaction safety risk research. A reaction calorimetry device with publication number CN221147902U can accurately obtain reaction calorimetric data under boiling reflux conditions by compensating for the heat loss caused by reflux during boiling reflux reactions. It does not require repeated calibration, is time-consuming, and can intuitively and accurately obtain data on reaction heat changes. However, it is not suitable for fine chemical reaction heat risk assessment.

[0003] Many of these reactions involve the generation and use of gases. When conducting reaction thermal risk assessment experiments for such processes, there is often gas overflow or overflow of reaction liquid. Although ordinary condensers can condense and reflux the reaction liquid, the heat consumed by gas overflow and condensation reflux is often measurable, resulting in small reaction calorimetric measurement values ​​and inability to accurately assess the process hazard level. Utility Model Content

[0004] The utility model aims to provide a device for calculating the heat carried by gas escape of a reaction calorimeter, so as to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for calculating the heat carried by gas escape of a reaction calorimeter, comprising a circulating water tank body, a reflux condenser is arranged inside the circulating water tank body, and the circulating water tank body is composed of a main shell and a cover body for easy maintenance and disassembly, a constant temperature refrigeration device is arranged on the top of the circulating water tank body, and the constant temperature refrigeration device regulates the temperature inside the circulating water tank body, a circulating pump is arranged on one side of the reflux condenser, and the inlet and outlet ends of the circulating pump are respectively connected with a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are respectively fixed to the top and bottom ends of the reflux condenser, and the water inlet pipe realizes the circulation of pumping water from the bottom end of the reflux condenser and inletting water from the top end, an electronic flow meter is installed on the water inlet pipe or the water outlet pipe, and a temperature sensor cooperating with the constant temperature refrigeration device is arranged on the periphery of the reflux condenser.

[0006] In a further embodiment, the reflux condenser can be fixed by bonding or fixing the bracket.

[0007] In a further embodiment, a cooling element is fixed to the cooling end of the constant temperature cooling device.

[0008] In a further embodiment, the cold conducting member is a metal rod, and the metal rod is in contact with the inside of the reflux condenser to achieve cold transfer.

[0009] In a further embodiment, the cooling member is a cold air delivery pipe, and the cold air delivery pipe is connected to the interior of the reflux condenser above the water level.

[0010] In a further embodiment, both liquid inlet and outlet ports of the reflux condenser are equipped with fixed sleeves, and a vortex fan is provided on the inner periphery of the fixed sleeve.

[0011] In a further embodiment, an extension rod is fixed between the two vortex fans, and a plurality of stirring blades are connected to the outer periphery of the extension rod.

[0012] In a further embodiment, a ring bearing is provided on the outer periphery of the extension rod, and a connecting wall plate is fixed between the outer shaft ring of the connecting wall plate and the inner wall of the reflux condenser tube.

[0013] In a further embodiment, the outer circumference of the water inlet pipe and the water outlet pipe is wrapped with pipe insulation cotton.

[0014] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0015] Installing a readable electronic flow meter on the water inlet pipe can calculate the circulating water flow rate within a certain period of time through the degree; the heat carried by the simulated gas overflow can be calculated through the fixed time water flow rate, inlet and outlet temperature difference, water specific heat and other data;

[0016] The circulating liquid inlet at the bottom and top of the reflux condenser can realize up and down circulation. When the liquid is inlet, the vertical force on the vortex fan (generated when the liquid passes through at high speed) is generated to make it rotate. With the extension rod and stirring blade, uniform stirring can be achieved to make the internal temperature uniform.

[0017] The reaction calorimeter gas escape carries a heat measurement device to solve the problem that the heat consumed by gas overflow and condensation reflux can often be measured, resulting in small reaction calorimetric measurement values ​​and inability to accurately assess process hazard levels. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a central cross-sectional view of the main body of the circulating water tank of the utility model;

[0021] Figure 3 For the utility model Figure 2 A magnified view of the structure at center A;

[0022] Figure 4 It is a schematic structural diagram of the fixing components of the extension rod of the utility model.

[0023] Description of reference numerals:

[0024] 1. Circulating water tank body; 2. Reflux condenser; 3. Constant temperature refrigeration equipment; 4. Digital display screen; 5. Circulating pump; 6. Water inlet pipe; 7. Water outlet pipe; 8. Pipe insulation cotton; 9. Electronic flow meter; 10. Temperature sensor; 11. Fixed mouth sleeve; 12. Vortex fan; 13. Extension rod; 14. Stirring blade; 15. Ring bearing; 16. Wall plate; 17. Cooling guide. DETAILED DESCRIPTION

[0025] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0026] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0027] The connection method can be bonding, welding, bolt connection, etc., depending on actual needs.

[0028] See also Figures 1 to 4 The heat measuring device comprises a circulating water tank body 1, which is composed of a main shell and a cover body for easy disassembly. A constant temperature refrigeration device 3 is arranged on the top of the cover body. The constant temperature refrigeration device 3 is selected according to actual conditions and can be a refrigeration compressor or other refrigeration equipment.

[0029] The water volume inside the circulating water tank body 1 is about 5-10 liters, which should be designed to be much larger than the return water volume to ensure that the water temperature in the water tank is constant;

[0030] When a cooling end of the constant temperature refrigeration device 3 is fixed with a cooling member 17, it is selected according to the situation. When the cooling member 17 is a metal rod, the metal rod contacts the inside of the reflux condenser 2 to realize cold transmission. When the cooling member 17 is a cold air delivery pipeline, it is necessary to set a cooling area at the cooling part of the constant temperature refrigeration device 3, cooperate with the fan and the cold air delivery pipeline, and deliver the cold air to the inside of the reflux condenser 2 above the water level to realize cold air delivery;

[0031] A reflux condenser 2 is provided inside the circulating water tank body 1. The reflux condenser 2 is fixed in position by bonding or fixing a bracket to prevent the reflux condenser 2 from shaking. Inlets are provided at the top and bottom of the reflux condenser 2. A circulating pump 5 is provided outside the reflux condenser 2.

[0032] The inlet and outlet ends of the circulation pump 5 are respectively connected to an inlet pipe 6 and an outlet pipe 7, which are respectively fixed to the top inlet and the bottom inlet of the reflux condenser 2. The operation of the circulation pump 5 can suck out the liquid at the bottom of the reflux condenser 2 and discharge it again through the top to achieve an up-and-down circulation.

[0033] The outer periphery of the water inlet pipe 6 and the water outlet pipe 7 is wrapped with pipe insulation cotton 8, which plays a role of heat preservation. The water inlet pipe 6 and the water outlet pipe 7 are corrosion-resistant hoses;

[0034] An electronic flow meter 9 is installed on the water inlet pipe 6 or the water outlet pipe 7. The electronic flow meter 9 is a timing flow meter, which can calculate the circulating water flow rate within a certain period of time through the degree;

[0035] A temperature sensor 10 is provided on the periphery of the reflux condenser 2. The temperature sensor 10 cooperates with the constant temperature refrigeration device 3. When the temperature is high, the constant temperature refrigeration device 3 performs refrigeration. When the temperature reaches a certain level, the constant temperature refrigeration device 3 stops running.

[0036] In order to improve the temperature uniformity, the two liquid inlet and outlet ports of the reflux condenser 2 are both installed with a fixed mouth sleeve 11, and the inner periphery of the fixed mouth sleeve 11 is provided with a vortex fan 12, and an extension rod 13 is fixed between the two vortex fans 12, and the outer periphery of the extension rod 13 is connected to a plurality of stirring blades 14, and the outer periphery of the extension rod 13 is provided with a ring bearing 15 (the outer periphery of the extension rod 13 is fixed to the inner ring of the ring bearing 15), and a connecting wall plate 16 is fixed between the outer shaft ring of the connecting wall plate 16 and the inner wall of the reflux condenser 2;

[0037] The upper and lower vortex fans 12 are acted upon by the force generated by the high-speed passage of the liquid, causing them to rotate in the same direction, serving as a rotational power for the extension rod 13 .

[0038] The above-mentioned detection equipment and refrigeration equipment can be connected to the digital display screen 4 through a controller, which is easy to operate and to observe the data, thereby improving convenience.

[0039] The above-mentioned components and electrical equipment are all existing technologies or existing feasible technologies. The working principles, sizes and models are irrelevant to the functions of this application, so they are not described in detail, and they are all controlled by remote control switches.

[0040] How it works

[0041] The reaction calorimeter has a device for calculating the heat carried by gas escape, and sets the circulating water temperature according to the feed temperature (when the inlet and outlet gas temperatures are both the feed temperature, the energy carried away by the gas overflow can be ignored). If there is gas overflow or reaction liquid is carried, the circulating water flow rate and the inlet and outlet temperature difference of the circulating water in the reaction stage can be read to calculate the heat carried by the overflowing gas for calorimetric supplementation, thereby solving the problem that the heat consumed by gas overflow and condensation reflux can often be measured, resulting in small reaction calorimetric measurement values ​​and inability to accurately assess process hazard levels.

[0042] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for calculating the heat carried by gas escape in a reaction calorimeter, comprising a circulating water tank body (1), wherein a reflux condenser (2) is arranged inside the circulating water tank body (1), and the circulating water tank body (1) is composed of a main shell and a cover body for easy maintenance and disassembly; Features: A constant temperature refrigeration device (3) is arranged on the top of the circulating water tank body (1), and the constant temperature refrigeration device (3) regulates the temperature inside the circulating water tank body (1); a circulating pump (5) is arranged on one side of the reflux condenser (2), and the inlet and outlet ends of the circulating pump (5) are respectively connected to a water inlet pipe (6) and a water outlet pipe (7); the water inlet pipe (6) and the water outlet pipe (7) are respectively fixed to the top and bottom ends of the reflux condenser (2), and the water inlet pipe (6) realizes the circulation of pumping water from the bottom end of the reflux condenser (2) and inlet water from the top end; an electronic flow meter (9) is installed on the water inlet pipe (6) or the water outlet pipe (7), and a temperature sensor (10) cooperating with the constant temperature refrigeration device (3) is arranged on the outer periphery of the reflux condenser (2).

2. A device for calculating the heat carried by gas escape in a reaction calorimeter according to claim 1, characterized in that: The reflux condenser (2) is fixed by bonding or fixing the bracket.

3. A device for calculating the heat carried by gas escape in a reaction calorimeter according to claim 1, characterized in that: A cooling element (17) is fixed to the cooling end of the constant temperature cooling device (3).

4. A device for calculating the heat carried by gas escape in a reaction calorimeter according to claim 3, characterized in that: The cold conducting member (17) is a metal rod, which is in contact with the inside of the reflux condenser tube (2) to achieve cold transfer.

5. A device for calculating the heat carried by gas escape in a reaction calorimeter according to claim 3, characterized in that: The cooling member (17) is a cold air delivery pipe, which is connected to the interior of the reflux condenser (2) above the water level.

6. The device for calculating the heat carried by gas escape in a reaction calorimeter according to claim 1, characterized in that: Both liquid inlet and outlet ports of the reflux condenser (2) are equipped with fixed sleeves (11), and a vortex fan (12) is arranged on the inner periphery of the fixed sleeve (11).

7. A device for calculating the heat carried by gas escape in a reaction calorimeter according to claim 6, characterized in that: An extension rod (13) is fixed between the two vortex fans (12), and a plurality of stirring blades (14) are connected to the outer periphery of the extension rod (13).

8. A device for calculating the heat carried by gas escape in a reaction calorimeter according to claim 7, characterized in that: A ring bearing (15) is provided on the outer periphery of the extension rod (13), and a connecting wall plate (16) is fixed between the outer shaft ring of the connecting wall plate (16) and the inner wall of the reflux condenser tube (2).

9. The device for calculating the heat carried by gas escape in a reaction calorimeter according to claim 1, characterized in that: The outer circumferences of the water inlet pipe (6) and the water outlet pipe (7) are wrapped with pipe thermal insulation cotton (8).

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