Coal saving agent and preparation method thereof

Abstract

The invention relates to the technical field of coal saving agents, and discloses a coal saving agent which is composed of a combustion improver, an oxidant, an emulsifier, a catalyst, a solvent, a thickener and a pH regulator. Wherein the combustion improver is a mixture of calcium nitrate tetrahydrate, calcium chloride, sodium chloride, sodium thiosulfate, D-trehalose, base oil, dicyclohexylamine and sodium acetate; the oxidant is sodium nitrate; the emulsifier is a mixture of polyethylene glycol monooleate and Tween 20; the catalyst is ferrocene; the pH regulator is hydrochloric acid; the solvent is a mixture of water and methanol. The coal-saving agent comprises a plurality of combustion improvers, such as calcium nitrate tetrahydrate, calcium chloride, sodium chloride, sodium nitrate, sodium thiosulfate, D-trehalose, dicyclohexylamine, sodium acetate and the like. The combustion improvers can promote the combustion reaction from different aspects in the coal combustion process, and the combustion improvers cooperate with one another, so that the combustion efficiency of the coal is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of coal-saving agents, and in particular to a coal-saving agent and a preparation method thereof. Background Art

[0002] In today's society, energy is an important support for economic development and human life. As a major fossil energy, coal occupies an important position in the global energy structure and is widely used in industrial production, power supply and other fields. However, there are problems such as low combustion efficiency and serious energy waste during the combustion of coal. A large amount of coal fails to burn fully, which not only causes waste of coal resources, increases energy costs, but also produces more pollutants, imposing greater pressure on the environment, such as the emissions of sulfur dioxide, nitrogen oxides, soot, etc., exacerbating air pollution and affecting the ecological environment and human health.

[0003] There are the following two types of chemical coal-saving agents on the current market. First, coal-saving agents with a single component. Some coal-saving agents on the market only contain a few components, such as only a combustion improver or only a catalyst, etc. Although such coal-saving agents can improve the combustion performance of coal to a certain extent, due to the single component, they cannot comprehensively solve various problems existing in the coal combustion process, such as incomplete combustion, coking, high pollutant emissions, etc., and the coal-saving effect is not ideal. For example, a coal-saving agent containing only a combustion improver may increase the combustion speed of coal, but may lead to too high combustion temperature, increasing the generation amount of nitrogen oxides, and at the same time, the improvement of the thermal stability and ash characteristics of coal is not obvious, and the comprehensive utilization efficiency of coal cannot be fundamentally improved.

[0004] Second, traditional composite coal-saving agents. Although some traditional composite coal-saving agents contain multiple components, the ratio between the components is not reasonable enough, and the synergistic effect is not obvious. The roles of each component during the coal combustion process cannot be fully exerted, resulting in the limitation of the overall performance of the coal-saving agent. Moreover, these coal-saving agents may have problems such as complex preparation process, high cost, poor stability, etc. In practical applications, there may be situations such as uneven mixing with coal and performance degradation during storage, affecting the coal-saving effect and the convenience of use; Therefore, the present invention proposes a coal-saving agent and a preparation method thereof to solve the above problems. Summary of the Invention

[0005] In order to solve the problem of the unsatisfactory effect of existing chemical coal-saving agents, the present invention provides a coal-saving agent and a preparation method thereof.

[0006] The coal-saving agent and the preparation method thereof provided by the present invention adopt the following technical solutions:

[0007] A coal-saving agent is composed of a combustion aid, an oxidizer, an emulsifier, a catalyst, a solvent, a thickener, and a pH regulator. The weight percentages of these components are as follows: combustion aid: 39.44% - 43.27%; oxidizer: 9% - 10%; emulsifier: 0.3% - 0.7%; catalyst: 0.005% - 0.01%; solvent: 46.7% - 49.2%; pH regulator: 0.1% - 0.2%.

[0008] Among them, the combustion aid is a mixture of calcium nitrate tetrahydrate, calcium chloride, sodium chloride, sodium thiosulfate, D - trehalose, base oil, dicyclohexylamine, and sodium acetate;

[0009] The oxidizer is sodium nitrate;

[0010] The emulsifier is a mixture of polyethylene glycol monooleate and Tween 20;

[0011] The catalyst is ferrocene;

[0012] The pH regulator is hydrochloric acid;

[0013] The solvent is a mixture of water and methanol.

[0014] Preferably, the coal-saving agent further includes 0.3% - 0.7% of sodium carboxymethyl cellulose as a thickener.

[0015] Preferably, the weight percentages of the components in the combustion aid are: calcium nitrate tetrahydrate 9% - 10%, calcium chloride 17.5% - 18.5%, sodium chloride 3.1% - 3.5%, sodium thiosulfate 2.7% - 3.2%, D - trehalose 6.5% - 7%, base oil 0.2% - 0.5%, dicyclohexylamine 0.3% - 0.5%, sodium acetate 0.04% - 0.07%.

[0016] Preferably, the weight percentages of the components in the emulsifier are: polyethylene glycol monooleate 0.2% - 0.4%; Tween 20 0.1% - 0.3%.

[0017] Preferably, the weight percentages of the components in the solvent are: methanol 1% - 1.5%; water 45.7% - 47.7%.

[0018] Preferably, the concentration of the hydrochloric acid is 37%.

[0019] The preparation method of the coal-saving agent includes the following steps:

[0020] Step 1: Weigh each substance according to the proportion;

[0021] Step 2: Disperse polyethylene glycol monooleate and Tween 20 in part of the water, add the base oil under stirring, and stir until emulsified for standby;

[0022] Step 3: Dissolve calcium nitrate tetrahydrate, calcium chloride, sodium chloride, sodium nitrate, sodium thiosulfate, D-trehalose, sodium acetate, ferrocene, and dicyclohexylamine in the remaining water, stir until evenly dissolved, and adjust the pH of the sample by adding hydrochloric acid;

[0023] Step 4: Add the emulsion in Step 1 to the mixed solution in Step 3 and stir until evenly mixed;

[0024] Step 5: Add the solution in Step 2 to the mixed solution in Step 4 and stir until evenly mixed;

[0025] Step 6: Dissolve sodium carboxymethylcellulose in part of the water and add the thickener sodium carboxymethylcellulose according to the consistency of the system.

[0026] In summary, the present invention includes at least one of the following beneficial technical effects:

[0027] 1. The coal-saving agent of the present invention contains a variety of combustion aids, such as calcium nitrate tetrahydrate, calcium chloride, sodium chloride, sodium nitrate, sodium thiosulfate, D-trehalose, dicyclohexylamine, sodium acetate, etc. These combustion aids can promote the combustion reaction from different aspects during the coal combustion process, cooperate with each other, and significantly improve the combustion efficiency of coal. Calcium nitrate tetrahydrate and sodium nitrate decompose at high temperatures to produce oxygen, providing sufficient oxygen source for coal combustion and making the coal burn more fully; components such as calcium chloride can lower the ignition point of coal, accelerate the ignition speed of coal, and reduce the waste caused by incomplete combustion in the initial stage of coal combustion. Through the synergistic effect of these combustion aid components, coal can burn more completely, effectively reducing the consumption of coal. Through experimental verification, under the same working conditions, using the coal-saving agent of the present invention can reduce the consumption of coal, save coal resources, and reduce energy costs;

[0028] 2. Emulsifiers such as polyethylene glycol monooleate and Tween 20 in the coal-saving agent can better mix coal with combustion aids and other components to form a uniform mixture, ensuring that all parts of the coal can fully contact the combustion aid components during the combustion process, avoiding incomplete combustion in local areas, and making the combustion process more stable and uniform. At the same time, sodium carboxymethylcellulose as a thickener can increase the adhesion and permeability of the coal-saving agent on the coal surface, further improve the binding effect between the coal-saving agent and coal, ensure that the coal-saving agent continuously plays a role during the coal combustion process, improve the combustion performance of coal, reduce fluctuations during the combustion process, and improve the stability and controllability of combustion. Detailed Embodiments

[0029] The following further elaborates on the present invention in detail.

[0030] Example 1:

[0031] In this embodiment, the component ratios of the coal-saving agent are as follows: calcium nitrate tetrahydrate 9%, calcium chloride 17.5%, sodium chloride 3.1%, sodium thiosulfate 2.7%, D-trehalose 6.5%, base oil 0.2%, dicyclohexylamine 0.3%, sodium acetate 0.04%, sodium nitrate 9%, polyethylene glycol monooleate 0.2%, Tween 20 0.1%, ferrocene 0.005%, hydrochloric acid (37%) 0.1%, water 45.7%, methanol 1%, and sodium carboxymethylcellulose 0.3%.

[0032] Example 2:

[0033] In this embodiment, the component ratios of the coal-saving agent are as follows: calcium nitrate tetrahydrate 10%, calcium chloride 18.5%, sodium chloride 3.5%, sodium thiosulfate 3.2%, D-trehalose 7%, base oil 0.5%, dicyclohexylamine 0.5%, sodium acetate 0.07%, sodium nitrate 10%, polyethylene glycol monooleate 0.4%, Tween 20 0.3%, ferrocene 0.01%, hydrochloric acid (37%) 0.7%, water 47.7%, methanol 1.5%, and sodium carboxymethylcellulose 0.7%.

[0034] The configuration methods of Example 1 and Example 2 are the same, including the following steps:

[0035] Step 1: Weigh each substance according to the ratio;

[0036] Step 2: Disperse polyethylene glycol monooleate and Tween 20 in part of the water, add the base oil under stirring, and stir until emulsified for standby;

[0037] Step 3: Dissolve calcium nitrate tetrahydrate, calcium chloride, sodium chloride, sodium nitrate, sodium thiosulfate, D-trehalose, sodium acetate, ferrocene, and dicyclohexylamine in the remaining water, dissolve and stir evenly, and add hydrochloric acid to adjust the pH of the sample;

[0038] Step 4: Add the emulsion in Step 1 to the mixed solution in Step 3, and stir to mix evenly;

[0039] Step 5: Add the solution in Step 2 to the mixed solution in Step 4, and stir to mix evenly;

[0040] Step 6: Dissolve sodium carboxymethylcellulose in part of the water, and add the thickener sodium carboxymethylcellulose according to the consistency of the system.

[0041] The prepared coal-saving agent is tested for its effect in the following manner, and the specific content is shown in the following table:

[0042] Under the same running time, the calorific value of raw coal and the calorific value of pulverized coal entering the kiln are nearly the same. The actual coal consumption of the first experimental group decreased to 0.82, and the standard coal consumption decreased to 1.79; the actual coal consumption of the second experimental group decreased to 0.9, and the standard coal consumption decreased to 1.85. From the above table, it can be seen that the coal-saving agent of the present application can effectively reduce the consumption of coal while ensuring the combustion efficiency.

[0043] It should be noted that in this article, terms such as "including", "comprising" 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 not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal-saving agent, characterized in that: It is composed of a combustion aid, an oxidant, an emulsifier, a catalyst, a solvent, a thickener and a pH regulator, wherein the components are respectively combustion aid: 39.44%-43.27 by weight; Oxidant: 9%-10%; Emulsifier: 0.3%-0.7%; Catalyst: 0.005%-0.01%; Solvent: 46.7%-49.2%; pH adjuster: 0.1%-0.2%; The combustion aid is a mixture of calcium nitrate tetrahydrate, calcium chloride, sodium chloride, sodium thiosulfate, D-trehalose, base oil, dicyclohexylamine and sodium acetate; The oxidant is sodium nitrate; The emulsifier is a mixture of polyethylene glycol monooleate and Tween 20; The catalyst is: ferrocene; pH adjusters are: hydrochloric acid; The solvent is a mixture of water and methanol.

2. A coal-saving agent according to claim 1, characterized in that: The coal-saving agent also includes 0.3%-0.7% of sodium carboxymethyl cellulose thickener.

3. A coal-saving agent according to claim 1, characterized in that: The components in the combustion improver account for the following percentages by total weight: 9%-10% of calcium nitrate tetrahydrate, 17.5%-18.5% of calcium chloride, 3.1%-3.5% of sodium chloride, 2.7%-3.2% of sodium thiosulfate, 6.5%-7% of D-trehalose, 0.2%-0.5% of base oil, 0.3%-0.5% of dicyclohexylamine, and 0.04%-0.07% of sodium acetate.

4. A coal-saving agent according to claim 1, characterized in that: The components in the emulsifier account for the following percentages by weight: polyethylene glycol monooleate 0.2%-0.4%; Tween 20 0.1%-0.3%.

5. A coal-saving agent according to claim 1, characterized in that: The total weight percentage of each component in the solvent is: methanol 1%-1.5%; water 45.7%-47.7%.

6. A coal-saving agent according to claim 1, characterized in that: The hydrochloric acid concentration is 37%.

7. The method for preparing the coal saving agent according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: Weigh each substance in proportion; Step 2: Disperse polyethylene glycol monooleate and Tween 20 in part of the water, add the base oil while stirring, stir until emulsified, and set aside; Step 3: Dissolve calcium nitrate tetrahydrate, calcium chloride, sodium chloride, sodium nitrate, sodium thiosulfate, D-trehalose, sodium acetate, ferrocene, and dicyclohexylamine in the remaining water, stir and dissolve evenly, and add hydrochloric acid to adjust the pH of the sample; Step 4: Add the emulsion of step 1 to the mixed solution of step 3, and stir to mix evenly; Step 5: Add the solution of step 2 to the mixed solution of step 4 and stir to mix evenly; Step 6: Dissolve sodium carboxymethyl cellulose in part of the water and add thickener sodium carboxymethyl cellulose according to the consistency of the system.

Images