Method for assisting heating through initiation type esterification exothermic reaction

Abstract

The invention relates to the technical field of energy-saving heating, in particular to a method for assisting heating through an initiation type esterification exothermic reaction, which comprises the following steps: arranging a closed esterification reactor in a heating system, and filling an initiation type esterification exothermic reactant in the closed esterification reactor; when the temperature of the heating system rises to an initiation temperature, esterification reactants in the closed esterification reactor start to undergo an esterification reaction; and after the heating system is heated to the initiation temperature, the heating system of the heating system continuously preserves heat, and the esterification reaction continuously releases heat to keep the temperature of the heating system constant. In this way, the temperature of the heating system can be maintained at a high level for a long time, frequent starting of the heating system is avoided, and consumption of expensive secondary flammable energy such as electric energy and fossil energy is reduced. The esterification product generated by the reaction can be reduced into an esterification reactant in a hydrolysis manner, so that the requirement on flammable secondary energy can be effectively reduced, and the emission of environmental pollutants is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving heating, and in particular to a method for using an induced esterification exothermic reaction for auxiliary heating. Background Art

[0002] For winter heating, it is generally carried out through public heating facilities, electric heaters or household heating facilities such as wall-mounted boilers. Because of the large temperature difference between indoor and outdoor in cold regions, the energy consumption is high. Relying solely on electric energy and fossil energy not only has high energy consumption but also high costs.

[0003] For example, the wall-mounted boiler for electric heating has a large power consumption, and when initially installed, the cost of the user's power supply infrastructure is also high, which is a problem for users and a burden in terms of capital investment. Another problem that is difficult for users to bear is the high power consumption and high operating cost.

[0004] Therefore, in view of the problem of large consumption of combustible secondary energy in current heating equipment, it is particularly important to reduce the use of combustible secondary energy and protect the environment. Summary of the Invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a method for using an induced esterification exothermic reaction for auxiliary heating. By using the method of the present invention, the consumption of combustible secondary energy can be effectively reduced.

[0006] The present invention provides a method for using an induced esterification exothermic reaction for auxiliary heating, including the following steps:

[0007] Install a closed esterification reactor in the heating system, and install an induced esterification exothermic reactant in the closed esterification reactor;

[0008] When the heating system is heated to the initiation temperature, the esterification reactants in the closed esterification reactor start the esterification reaction;

[0009] When the heating system is heated to the initiation temperature, the heating system of the heating system continues to keep warm, and the esterification reaction continuously releases heat to keep the temperature of the heating system constant.

[0010] Preferably, the closed esterification reactor is a closed reaction shell, and a heating rod is arranged outside the reaction shell, and the heating rod is not in direct contact with the closed esterification reactor.

[0011] Preferably, the inner wall of the closed reaction shell is made of a corrosion-resistant material, specifically stainless steel or silicon carbide.

[0012] Preferably, the heating system is an electric heating system, a gas heating system or an oil heating system.

[0013] Preferably, the initiation temperature is 40 to 60 °C.

[0014] Preferably, the initiator esterification exothermic reactant in the closed esterification reactor does not undergo a chemical reaction at a temperature below 40 °C.

[0015] Preferably, the esterification reaction is preferably an esterification reaction of the type A + B = C + H2O + ΔQ.

[0016] Preferably, A is oxalic acid; B is ethylene glycol or propylene glycol.

[0017] The present invention provides a method for using an initiator esterification exothermic reaction for auxiliary heating, comprising the following steps: setting a closed esterification reactor in a heating system, and loading an initiator esterification exothermic reactant in the closed esterification reactor; when the heating system is heated to the initiation temperature, the esterification reactant in the closed esterification reactor starts to undergo an esterification reaction; when the heating system is heated to the initiation temperature, the heating system of the heating system continues to keep warm, and the esterification reaction continuously releases heat to keep the temperature of the heating system constant.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the present invention sets a closed reactor in the heating system, and loads an initiator esterification exothermic reactant in the closed esterification reactor. When the heating system is heated to the set initiation temperature, the esterification reactant in the reactor slowly undergoes an esterification exothermic reaction, supplementing heat energy to the heating system, so that the heating temperature of the heating system is maintained. In this way, the temperature of the heating system can be maintained at a relatively high level for a long time, avoiding frequent startup of the heating system, reducing energy consumption, and reducing carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural view (front view) of a heating system provided by an embodiment of the present invention.

[0020] Figure 2 It is a schematic structural view (top view) of a closed esterification reactor in a heating system provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] The present invention provides a method for using an initiator esterification exothermic reaction for auxiliary heating, comprising the following steps:

[0023] A closed esterification reactor is set in the heating system, and an initiating esterification exothermic reactant is contained in the closed esterification reactor;

[0024] When the heating system is heated to the initiating temperature, the esterification reactants in the closed esterification reactor undergo a slow exothermic esterification reaction;

[0025] When the heating system is heated to the initiating temperature, the heating system of the heating system maintains a stable initiating temperature, and the esterification reaction continuously releases heat to maintain the environmental heating effect of the heating system.

[0026] The closed esterification reactor is a closed reaction housing, and a heating rod is arranged outside the reaction housing. The heating rod is not in direct contact with the closed esterification reactor. A gap of more than 0.5 cm is maintained between the heating rod and the closed esterification reactor.

[0027] The structure of the closed reaction housing is similar to that of a common radiator, and the esterification exothermic reactant is stored in the closed reaction housing.

[0028] The inner wall of the closed reaction housing is made of corrosion-resistant materials such as stainless steel or silicon carbide, specifically polished stainless steel or silicon carbide.

[0029] The heating system is an electric heating system, a gas heating system or an oil heating system. Specifically, it can be an electric heater.

[0030] The initiating temperature is 40 - 60 °C.

[0031] When the heating system is heated to the initiating temperature, the esterification reactants in the closed esterification reactor undergo a slow exothermic esterification reaction to improve the efficiency of the heater and reduce power consumption; when the heating system is heated to the initiating temperature, the heating system of the heating system continuously keeps warm, and the esterification reaction continuously releases heat to keep the overall temperature of the heating system constant; furthermore, the slow exothermic esterification reaction is utilized to reduce the consumption of electric energy or fossil fuels.

[0032] The initiating esterification exothermic reactant in the closed esterification reactor does not undergo a chemical reaction below 40 °C. After initiation, the esterification reaction is mild, and the chemical heat is continuously released slowly.

[0033] The esterification reaction preferably belongs to the type of esterification reaction A + B = C + H2O + ΔQ; as time goes by, there is a weak polymerization exothermic reaction nA + nB = nD + (2n - 1)H2O + ΔQ.

[0034] Among them, A is preferably oxalic acid; B is preferably ethylene glycol or propylene glycol.

[0035] In addition to non-toxic esters, the other by-products of the esterification reaction are mainly water and a small amount of low polyesters.

[0036] Compared with the existing heating systems, the present invention sets a closed esterification reactor in the existing heating system. In some specific embodiments of the present invention, the closed esterification reactor is arranged at the bottom of the heating system. The heating system further includes an esterification reactant feeding tank for adding esterification reactants to the closed esterification reactor. The heating system further includes a heating device; the heating device includes a heating rod and a heating box, and the heating rod is arranged outside the heating box, and the function of the heating rod is to provide the necessary heat for initiating the esterification reaction in the heating box. The heating system further includes a water separator, and the function of the water separator is to promote the esterification reaction to proceed in the forward direction and promote the reaction to release heat.

[0037] Figure 1 The structural schematic diagram (front view) of the heating system provided for an embodiment of the present invention.

[0038] Figure 2 The structural schematic diagram (top view) of the closed esterification reactor in the heating system provided for an embodiment of the present invention.

[0039] Among them, 1 is the heater housing, 2 is the exhaust port, 3 is the heat sink module, 4 is the breathing valve, 5 is the heating device (including a heating rod and a heating box), 6 is the closed esterification reactor, 7 is the esterification reactant feeding tank, 8 is the water separator, and 9 is the check valve.

[0040] The working process of the heating system of the present invention is as follows: Turn on the power heating switch. When the heating device 5 is heated to a temperature above the initiation temperature of 40 °C of the esterification reactor 6, the electric heating switch of the heating device 5 is powered off. After the reactants in the esterification reactor undergo an esterification reaction, heat is continuously released, and the heat sink module 3 is heated to heat the environment to achieve the heating effect. During the heat release process, a small amount of water will volatilize, and the water separator 8 is needed to separate water, and the check valve 9 prevents the separated water from flowing back into the closed esterification reactor to ensure the continuous progress of the reaction. The exhaust port 2 is used to discharge the bubbles generated in the heat sink module 3 to prevent uneven heat dissipation. The heater housing 1 is for protection to prevent scalding accidents of the heater.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention sets a closed reactor in the heating system, and a triggered esterification heat-releasing reactant is installed in the closed esterification reactor. When the heating system is heated to the set initiation temperature, the esterification reactants in the reactor slowly undergo an esterification heat-releasing reaction, supplementing heat energy to the heating system, so that the heating temperature of the heating system is maintained. In this way, the temperature of the heating system can be maintained at a relatively high level for a long time, avoiding frequent startup of the heating system and reducing energy consumption.

[0042] In the present invention, the esterification reaction belongs to an initiation-type chemical exothermic reaction. The method of using the exothermic esterification reaction for auxiliary heating is to set up a closed esterification reactor in the heating system. An esterification reaction reagent is provided in the reactor. The heating system is heated to the initiation temperature of the esterification reaction. The esterification reactants are heated to initiate the reaction and start to slowly release chemical reaction heat, so that the temperature of the heating system can be maintained at a relatively high level for a long time, reducing the consumption of expensive secondary combustible energy sources such as electric energy and fossil energy. The esterified product generated by this reaction can be reduced to the esterification reactants by hydrolysis. In this way, the demand for combustible secondary energy can be effectively reduced, and the emission of environmental pollutants can be reduced.

[0043] The present invention has no special restrictions on the raw material sources used above, and they can be generally commercially available.

[0044] To further illustrate the present invention, the following is a detailed description of a method for using an initiation-type esterification exothermic reaction for auxiliary heating provided by the present invention in combination with embodiments, but it should not be understood as a limitation on the protection scope of the present invention.

[0045] Example 1

[0046] A method for using an initiation-type esterification exothermic reaction for auxiliary heating, using the heating system and the closed esterification reactor as described in Figure 1 and Figure 2 ;

[0047] The esterification reaction is an exothermic esterification reaction of ethylene glycol and oxalic acid, and the chemical equations are shown in Formulas (1) and (2):

[0048] When the molar ratio of oxalic acid to ethylene glycol is 1:1, the reaction equation has two cases, Formulas (1) and (2); when the reaction is sufficient, the main product is the cyclized product 1,4-dioxacyclooctane-5,8-dione of Formula (1), and there are also low polyester products of weak Formula (2) generated, and the heat release is relatively more ideal.

[0049]

[0050] In Example 1, the preferred ratio of oxalic acid to ethylene glycol is a molar ratio of 1:1.05 to 1:1.3; a relatively large chemical reaction heat will be obtained at this ratio.

[0051] Based on the above reaction system for theoretical calculation, without considering the process changes of pressure and temperature, through theoretical calculation, when comparing 10 mol of esterification reactants with the energy consumption of a pure electric heater, the electric energy consumption is saved by about 16.19%.

[0052] The specific calculation results are as follows: Without considering the process changes of pressure and temperature, the reaction heat of the esterification reaction is equal to the standard molar combustion enthalpy of the reaction products minus the standard molar combustion enthalpy of the reactants. The calculation according to this principle is shown in Table 1.

[0053] Table 1 Power saving situation by comparing the esterification reactants with the energy consumption of a pure electric heater in Example 1

[0054]

[0055] This exothermic esterification reaction is used in the auxiliary heating method, enabling the heating system to maintain operation for a relatively long time (about 15 hours) after one startup, maintaining a winter indoor heating temperature of 20 m 2

[0056] Example 2

[0057] A method for using an initiated exothermic esterification reaction for auxiliary heating, using the heating system and the closed esterification reactor as described in Figure 1 and Figure 2 ;

[0058] The esterification reaction is the exothermic esterification reaction of ethylene glycol and oxalic acid, and the chemical equations are shown in Equations (3) and (2):

[0059] When the molar ratio of oxalic acid to ethylene glycol is 1:2, the reaction equation is Equation (3); the reaction mainly produces 4-(2-hydroxyethoxy)-4-oxobutyric acid. And there are low polyester products accompanied by weak Equation (2) generated, and the heat release is relatively more ideal.

[0060]

[0061]

[0062] In Example 1, the preferred ratio of ethylene glycol to oxalic acid is a molar ratio of 2.05:1 to 2.3:1; a relatively large chemical reaction heat will be obtained at this ratio.

[0063] Based on the above reaction system for theoretical calculation, setting the system temperature at 313 K and the pressure at standard atmospheric pressure, through theoretical calculation, comparing 10 mol of esterification reactants with the energy consumption of a pure electric heater, the power consumption is saved by about 15.62%.

[0064] The specific calculation results are as follows: Without considering the process changes of pressure and temperature, the reaction heat of the esterification reaction is equal to the standard molar combustion enthalpy of the reaction products minus the standard molar combustion enthalpy of the reactants. The calculation according to this principle is shown in Table 2.

[0065] Table 2 Power saving situation by comparing the esterification reactants with the energy consumption of a pure electric heater in Example 2 ​

[0066]

[0067] This esterification exothermic reaction is used in an auxiliary heating method, enabling the heating system to maintain operation for a relatively long time (about 15 hours) after a single startup, maintaining a winter indoor heating temperature of 20 m 2 of.

[0068] Example 3

[0069] A method for using an initiated esterification exothermic reaction for auxiliary heating, using a heating system and a closed esterification reactor as described in Figure 1 and Figure 2 ;

[0070] The esterification reaction is an exothermic esterification reaction of ethylene glycol and oxalic acid, and the chemical equations are as shown in Equations (4) and (2):

[0071] When the molar ratio of oxalic acid to ethylene glycol is 2:1, the reaction equation is Equation (4), and the main product is 1,2-diethyl propionate. There is also a low polyester product accompanied by the weak Equation (2) generated, and the heat release is relatively more ideal.

[0072]

[0073] In Example 1, the preferred ratio of oxalic acid to ethylene glycol is a molar ratio of 2.05:1 to 2.3:1; a relatively large chemical reaction heat will be obtained at this ratio.

[0074] Based on the above reaction system for theoretical calculation, setting the system temperature at 313 K and the pressure at standard atmospheric pressure, through theoretical calculation, comparing 10 mol of esterification reactants with the energy consumption of a pure electric heater, the power consumption is saved by about 14.30%.

[0075] The specific calculation results are as follows: Without considering the process changes in pressure and temperature, the reaction heat of the esterification reaction is equal to the standard molar combustion enthalpy of the reaction products minus the standard molar combustion enthalpy of the reactants. The calculation is shown in Table 3 according to this principle.

[0076] Table 3 Power savings in Example 3 by comparing the energy consumption of esterification reactants with that of a pure electric heater

[0077]

[0078] This esterification exothermic reaction is used in an auxiliary heating method, enabling the heating system to maintain operation for a relatively long time (about 15 hours) after a single startup, maintaining a winter indoor heating temperature of 20 m 2 of.

[0079] The description of the above embodiments is only used to help understand the method of the present invention and its core idea. Various modifications to these embodiments will be obvious to those of ordinary skill in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for auxiliary heating using an induced esterification exothermic reaction, comprising the following steps: Set up a closed esterification reactor in the heating system, and install induced esterification exothermic reactants in the closed esterification reactor; When the heating system rises to the initiation temperature, the esterification reactants in the closed esterification reactor start the esterification reaction; When the heating system rises to the initiation temperature, the heating system of the heating system keeps the temperature constant, and the esterification reaction continuously releases heat to keep the temperature of the heating system constant.

2. The method according to claim 1, wherein The closed esterification reactor is a closed reaction shell, and a heating rod is arranged outside the reaction shell, and the heating rod is not in direct contact with the closed esterification reactor.

3. The method according to claim 1, characterized in that, The inner wall of the closed reaction shell is made of corrosion-resistant material, specifically stainless steel or silicon carbide.

4. The method according to claim 1, wherein The heating system is an electric heating system, a gas heating system or an oil heating system.

5. The method according to claim 1, characterized in that, The initiation temperature is 40 - 60 °C.

6. The method according to claim 1, characterized in that The induced esterification exothermic reactants in the closed esterification reactor do not undergo chemical reactions below 40 °C.

7. The method according to claim 1, characterized in that The esterification reaction preferably belongs to the type of esterification reaction A + B = C + H2O + ΔQ.

8. The method according to claim 7, wherein A is oxalic acid; B is ethylene glycol or propylene glycol.

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