Testing device for CO2 desorption energy consumption of alcamines solution

Abstract

The utility model discloses a testing device for CO2 desorption energy consumption of an alcohol amine solution in the technical field of CO2 desorption testing equipment, which comprises a magnetic stirring heater, a glass reaction kettle is arranged in a heating tank of the magnetic stirring heater, two sides of the glass reaction kettle are respectively communicated with a gas heater and a condenser pipe, and the condenser pipe is communicated with the gas heater. The other end of the gas heater is communicated with a mass flow meter, and the other end of the mass flow meter is communicated with a nitrogen cylinder. Standardized, economical and practical equipment components are adopted, the whole set of equipment is simple in structure, low in use cost and suitable for small-scale tests and industrial simulation tests such as glass reaction kettles, condensation pipes and electric energy meters in laboratories, hardware cost of the testing device is reduced, accurate detection and recording equipment such as a thermocouple and a mass flow meter are integrated, and the testing efficiency is improved. Key parameters in the desorption process can be monitored in real time and accurately measured, and high accuracy and repeatability of experimental results are ensured through multi-point measurement and comprehensive data analysis.

Description

TECHNICAL FIELD

[0001] The utility model belongs to CO2 desorption test equipment technical field especially relates to a kind of alcohol amine solution CO2 desorption energy consumption's testing device. BACKGROUND

[0002] As one of the most important greenhouse gases, the increase in CO2 emissions is one of the main reasons for global climate change. With the acceleration of industrialization and the growth of energy demand, CO2 emissions have been rising year by year, putting unprecedented pressure on the Earth's environment. In response to this serious challenge, the international community has generally recognized the need to take effective measures to control and reduce CO2 emissions. In this context, the importance of CO2 capture technology has become increasingly apparent.

[0003] Among CO2 capture technologies, chemical absorption technology is the most mature due to its good flue gas adaptability and has been in industrial application for many years. The alcohol amine method, as a mature chemical absorption process, plays a crucial role. The alcohol amine method has good performance in CO2 absorption, especially primary and secondary amine solutions, which have strong basicity and good reactivity, allowing for rapid CO2 absorption. The alcohol amine method is not limited to flue gas treatment in the power industry, but also has wide applications in natural gas treatment, coal chemical industry, and other fields. Compared to other emerging CO2 capture technologies, the alcohol amine method has undergone decades of development and improvement, accumulating rich engineering experience and operational data. Currently, several large commercial projects have been successfully implemented worldwide, demonstrating its feasibility and stability in practical operation.

[0004] However, a key challenge in this process is the regeneration energy consumption required to desorb CO2 from the rich liquid. According to relevant research, the regeneration energy consumption of traditional chemical absorption methods is approximately 4GJ / t-CO2. Therefore, the focus of research should be on reducing the regeneration energy consumption of the absorbent, which is mainly composed of sensible heat, latent heat, and reaction heat. High regeneration energy consumption not only increases operating costs but also may offset some of the emission reduction benefits. Therefore, it is particularly important to develop a device that can accurately, quickly, and economically evaluate CO2 desorption energy consumption. However, there is currently a lack of low-cost and convenient devices for testing desorption energy consumption. Based on this, we propose a device for testing the CO2 desorption energy consumption of alcohol amine solutions. INVENTION CONTENTS

[0005] In view of the problems existing in the prior art, the utility model discloses a kind of alcohol amine solution CO2 Desorption energy consumption's testing device, by providing simple, low-cost test method, reduce the complexity and high cost problem of traditional test method;By real-time accurate monitoring the key parameters in desorption process, help optimizing the operating conditions and energy consumption distribution in desorption process, improve CO2 desorption efficiency and the overall performance of capture technology.

[0006] The utility model is such implementation, a kind of alcohol amine solution CO2 Desorption energy consumption's testing device, including magnetic stirring heater, heating pool of magnetic stirring heater is provided with glass reactor, the both sides of glass reactor are connected with gas heater and condenser tube respectively, the other end of gas heater is connected with mass flowmeter, the other end of mass flowmeter is connected with nitrogen cylinder, flow controller is electrically connected on mass flowmeter, the other end of condenser tube is connected with conical flask, the bottom of conical flask is provided with electronic balance, the right of electronic balance is provided with CO2 analyzer, CO2 analyzer is connected between conical flask.

[0007] Optionally, electric energy meter is electrically connected on the magnetic stirring heater, and the electric energy meter is arranged on the left of the magnetic stirring heater.

[0008] Optionally, the glass reactor is provided with a heat preservation cover, and the heat preservation cover is arranged on the top of the heating pool of the magnetic stirring heater.

[0009] Optionally, the top of the glass reactor is provided with a thermocouple, and the bottom of the thermocouple is inserted into the glass reactor.

[0010] Optionally, the magnetic stirring heater is movably provided with an acrylic heat preservation box, and the heating pool and the glass reactor of the magnetic stirring heater are located in the acrylic heat preservation box.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] 1、The utility model discloses a standardized and economical practical equipment assembly, and the whole equipment structure is simple, and the use cost is low, is suitable for laboratory small-scale test and industrial simulation test, such as glass reactor, condenser tube and electric energy meter, reduces the hardware cost of testing device, integrates accurate detection and recording equipment such as thermocouple and mass flowmeter, can real-time monitoring and accurate measurement the key parameters in desorption process, through multipoint measurement and data comprehensive analysis, ensure the high accuracy and repeatability of experimental result.

[0013] 2. The utility model can evaluate sensible heat, latent heat and reaction heat energy consumption in the desorption process respectively, through the systematic energy consumption calculation model, the source of different energy consumption is clear, the utility model has various functions, and the rate of desorption can be obtained, which provides the basis for further optimizing the desorption process.

[0014] 3. The utility model discloses simple operation, clear and high degree of automation can reduce artificial error, and, portable, can be quickly deployed and used under various laboratory or industrial environment, is suitable for large-scale popularization.

[0015] Other features and advantages of the utility model will become clear through the following detailed description of exemplary embodiments of the utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the structural schematic diagram provided by the utility model.

[0017] Fig. 2 It is the sectional structure schematic diagram of the inside of magnetic stirring heater provided by the utility model.

[0018] Fig. 3 It is the structure schematic diagram of the side of magnetic stirring heater provided by the utility model.

[0019] In the drawing: 1, magnetic stirring heater;2, glass reaction kettle;3, gas heater;4, condenser tube;5, mass flowmeter;6, flow controller;7, nitrogen cylinder;8, electric energy meter;9, conical flask;10, electronic balance;11, CO2 analyzer;12, heat preservation cover;13, thermocouple;14, acrylic heat preservation box. DETAILED DESCRIPTION

[0020] In order to further understand the utility model content, characteristics and efficacy of the utility model, the following examples are cited, and the detailed description is as follows in cooperation with the drawings.

[0021] As Figs. 1 to 3 Indicated, the utility model embodiment provides a kind of alcohol amine solution CO2 desorption energy consumption testing device, including magnetic stirring heater 1, glass reaction kettle 2 is provided in the heating cell of magnetic stirring heater 1, glass reaction kettle 2 is respectively communicated with gas heater 3 and condenser tube 4 on two sides, another end of gas heater 3 is communicated with mass flowmeter 5, another end of mass flowmeter 5 is communicated with nitrogen cylinder 7, flow controller 6 is electrically connected on mass flowmeter 5, another end of condenser tube 4 is communicated with conical flask 9, electronic balance 10 is provided in the bottom of conical flask 9, CO2 analyzer 11 is provided in the right of electronic balance 10, and CO2 analyzer 11 is communicated between conical flask 9.

[0022] Furthermore, an electricity meter 8 is electrically connected to the magnetic stirring heater 1, and the electricity meter 8 is located on the left side of the magnetic stirring heater 1.

[0023] The function of electricity meter 8 is to record the total energy consumption of the entire system, so that subsequent staff can perform energy consumption calculations.

[0024] Furthermore, a heat-insulating cover 12 is provided on the glass reactor 2, and the heat-insulating cover 12 is located on the top of the heating tank of the magnetic stirring heater 1.

[0025] The design of the heat-insulating cover 12 can maintain the optimal temperature range of the desorption reaction, reduce heat loss, and achieve the effects of saving energy and improving the accuracy and consistency of experimental data.

[0026] Furthermore, a thermocouple 13 is installed on the top of the glass reactor 2, and the bottom of the thermocouple 13 is inserted into the inside of the glass reactor 2.

[0027] Thermocouple 13 monitors temperature changes in real time to ensure that the desorption temperature during the reaction is maintained at the required temperature.

[0028] Furthermore, an acrylic insulation box 14 is movably mounted on the magnetic stir heater 1, and the heating pool and glass reactor 2 on the magnetic stir heater 1 are both located inside the acrylic insulation box 14.

[0029] The acrylic insulated box 14 is designed to achieve heat preservation, reduce heat dissipation energy consumption, and allow for clear observation of the reaction process.

[0030] Working principle and usage process of this utility model:

[0031] Without heating, turn on the magnetic stirring rod on the magnetic stirring heater 1 and run the entire device. Record the energy consumption E0 through the energy meter 8. The purpose is to obtain the energy consumption corresponding to magnetic stirring.

[0032] With the glass reactor 2 containing an absorbent liquid that has not absorbed CO2, the entire apparatus is run. Before starting the CO2 desorption experiment, the temperature of the glass reactor 2 is heated to the preset temperature. When the CO2 desorption temperature is maintained at 80°C, the magnetic stirring rod on the magnetic stirring heater 1 is turned on, and the entire apparatus is run. The energy consumption E1 is recorded by the energy meter 8.

[0033] With the CO2-absorbed liquid already present in glass reactor 2, the entire apparatus is operated, and the N2 flow rate is adjusted. If a change in the N2 flow rate is needed, it is controlled by flow controller 6. The N2, which has a stripping effect, along with the desorbed CO2 and a small amount of amine solution, exits from glass reactor 2 and passes through condenser 4, which has a cooling function. This ensures minimal loss of amine solution and does not affect the accuracy of the instrument. Sensible heat consumption can be obtained from temperature data and can be calculated using the sensible heat formula. wherein MrCO2 is the molar mass of CO2, 44 g / mol, cP is the specific heat capacity of the absorbent rich solution, KJ / (kg.K), msol is the mass of the absorbent rich solution, kg, nCO2 is the amount of CO2 desorbed during the regeneration process, mol.

[0034] The latent heat energy consumption can be calculated according to the liquid collected in the conical flask 9 by weighing with the electronic balance 10, and according to the latent heat formula The latent heat energy consumption is thus obtained; wherein ∆Hwvap is the water vaporization latent heat, kJ / mol, nw is the molar amount of water in the regenerated gas, mol, nCO2 is the amount of CO2 desorbed during the regeneration process, mol;

[0035] The heating energy consumption E2 can be obtained by subtracting the energy consumed by the magnetic stirring rod from the energy input into the system obtained by the electric energy meter 8, i.e. E2=E0-E1; and the reaction energy consumption Q can also be obtained reac : Q reac =E 2 -Q sens -Q evap This method can be extended to the CO2 desorption energy consumption under different kinds and different working conditions;

[0036] The CO2 analyzer 11 is used to measure the desorption rate, and the CO2 analyzer 11 measures and records the data every 20 seconds, records the concentration of CO2, and obtains the CO2 loading, so as to calculate the desorption rate, for example, the desorption rate of the absorbent to CO2 at time t is: ; wherein: r des (t) is the desorption rate of the absorbent to CO2 at time t, mol / L, Qdes is the flow of N2 in the desorption experiment, L / min, Vm is the molar volume of gas, 22.4 L / mol, and φ(t) is the volume concentration of CO2 in the mixed gas at the outlet end at time t.

[0037] Table 1 summarizes various energy consumptions in the desorption process.

[0038]

[0039] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A testing device for testing energy consumption of CO2 desorption of alcohol amine solution, comprising a magnetic stirring heater (1), characterized in that: The heating pool of the magnetic stirring heater (1) is provided with a glass reaction kettle (2), the two sides of the glass reaction kettle (2) are respectively communicated with a gas heater (3) and a condenser pipe (4), the other end of the gas heater (3) is communicated with a mass flowmeter (5), the other end of the mass flowmeter (5) is communicated with a nitrogen cylinder (7), the mass flowmeter (5) is electrically connected with a flow controller (6), the other end of the condenser pipe (4) is communicated with an Erlenmeyer flask (9), the bottom of the Erlenmeyer flask (9) is provided with an electronic balance (10), the right side of the electronic balance (10) is provided with a CO2 analyzer (11), the CO2 analyzer (11) is communicated with the Erlenmeyer flask (9).

2. The testing device for energy consumption of CO2 desorption of alcohol amine solution according to claim 1, characterized in that: The magnetic stirring heater (1) is electrically connected with an electric energy meter (8), and the electric energy meter (8) is arranged on the left side of the magnetic stirring heater (1).

3. The testing device for energy consumption of CO2 desorption from an alcohol amine solution according to claim 1, characterized in that: The glass reaction kettle (2) is provided with a heat preservation cover (12), and the heat preservation cover (12) is arranged on the top of the heating pool of the magnetic stirring heater (1).

4. The testing device for energy consumption of CO2 desorption of alcohol amine solution according to claim 1, characterized in that: The top of the glass reaction kettle (2) is provided with a thermocouple (13), and the bottom of the thermocouple (13) is inserted into the glass reaction kettle (2).

5. The testing device for energy consumption of CO2 desorption from an alcohol amine solution according to claim 1, characterized in that: The magnetic stirring heater (1) is movably provided with an acrylic heat preservation box (14), and the heating pool and the glass reaction kettle (2) on the magnetic stirring heater (1) are located in the acrylic heat preservation box (14).

Images