Preparation method of coal-saving and calorie-improving agent

Abstract

The invention relates to the technical field of coal saving, and discloses a coal-saving agent which is mainly prepared from the following raw materials: a purification-grade high-molecular nano-metal complexing agent KKXX, EDTA (Ethylene Diamine Tetraacetic Acid), small-molecular water and a rare-earth nano-metal complexing agent. Wherein the high-molecular nano-metal complexing agent KKXX is mainly composed of halloysite nanotubes (HNTs), polyethyleneimine (PEI) and dendritic polyamide (PAMAM), and also contains a small amount of carbon nanotubes, a polylactic acid-glycolic acid copolymer and oleic acid; the rare earth nano-metal complexing agent is composed of an oxidizing agent, an auxiliary chemical agent, a combustion improver, a penetrating agent, a swelling agent, a cleaning agent, a dispersing agent and a stabilizing agent. According to the present invention, the coal produced by using the novel clamping agent has characteristics of high adhesion, low inert capacity, calorific value increase, calorific value increase, no ignition point difficulty caused by too low temperature, high crushing strength, easy molding, convenient transportation, and difficult crushing during the transportation, the coal production process is simple and rapid, the operation difficulty is reduced, and the ratio can be adjusted at any time according to the requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of coal saving, and in particular to a method for preparing a coal saving and caloric extracting agent. Background Art

[0002] Thermal coal is coal used to generate electricity. Specifically, the coal is ground into powder and burned in the boiler of a thermal power plant. The water in the boiler absorbs heat and becomes steam with certain parameters to drive the turbine to rotate. The steam turbine drives the generator to generate electricity. It is used for power generation, so it is called thermal coal.

[0003] The existing coal blending ratio of power coal is generally fixed and cannot be changed according to needs, resulting in the coal blending result not meeting the demand. In addition, the existing coal blending ratio cannot be adjusted according to demand, the production process is complicated, and real-time operation cannot be performed.

[0004] Therefore, there is an urgent need for a new type of coal calorific value agent and a preparation method thereof to solve the problems of unadjustable coal blending ratio and complicated production process. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a method for preparing a coal-saving calorie-extracting agent.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme: a method for preparing a coal-saving calorie extracting agent, wherein the raw materials are mainly composed of a purified-grade polymer nano-metal composite agent KKXX, EDTA, small molecule water and a rare earth nano-metal composite agent;

[0007] Among them, the polymer nanometal composite KKXX is mainly composed of halloysite nanotubes (HNTs), polyethyleneimine (PEI) and polyamide dendrimer (PAMAM), and also contains a small amount of carbon nanotubes, polylactic acid-glycolic acid copolymer and oleic acid;

[0008] The rare earth nano-metal composite agent is composed of an oxidant, a catalytic agent, a combustion aid, a penetrant, a bulking agent, a cleaning agent, a dispersant and a stabilizer.

[0009] The preparation method comprises at least the following steps:

[0010] S1: pouring small molecule water, polymer nano-metal composite KKXX, EDTA and rare earth nano-metal composite into a constant temperature and pressure container in sequence, stirring them evenly, and adding a certain amount of pure water during the stirring process to obtain a mixture;

[0011] S2: The mixture A is allowed to stand for 1 hour to allow for a preliminary reaction, and then a flocculant is added to precipitate the particles in the suspension, and the suspension is removed to obtain a fluid mixture;

[0012] S3: adding lime water while stirring the convection mixture; after the stirring is completed, the mixture is allowed to stand for 0.5 hours, and the suspension is taken out to obtain a card-lifting agent.

[0013] In S1, the pressure is controlled between 10KPa and 20KPa, the stirring speed is 300r / min, and the stirring time is 1.5h;

[0014] EDTA preparation steps:

[0015] Sodium cyanide solution, liquid alkali solution, and ethylenediamine are placed in a condensation reaction kettle, heated to 88°C to 95°C, and formaldehyde and the remaining sodium cyanide solution are added dropwise. After the reaction is complete, hydrogen peroxide is added for decolorization to obtain a condensation material. The condensation material is then placed in an acidification reaction kettle, hydrochloric acid is added to a pH of 2.1-4, and the precipitated crystals are centrifuged to obtain EDTA wet material, which is then air-dried to obtain EDTA.

[0016] In the step of preparing the card-extracting agent, the pH value is controlled between 6.5 and 7.8.

[0017] The present invention has the following beneficial effects:

[0018] 1. The emulsifier used is alkylphenol polyoxyethylene ether, which is a non-ionic surfactant with good wetting properties. It is oriented at the oil-water interface, with the hydrophilic group facing the water phase and the hydrophobic group facing the oil phase, thereby reducing the interfacial tension and achieving emulsification.

[0019] The combustion aid is a mixture of potassium permanganate and industrial salt. Potassium permanganate helps to provide the active oxygen necessary for the preheating, combustion and burnout stages of the combustion, promoting the oxygen required by the coal during the combustion process. Industrial salt can cause cracks in the coal during the combustion process.

[0020] The use of sodium citrate as a penetrant and an emulsifier helps to complex the metal ions in the coal-saving agent, allowing it to fully penetrate into the coal powder and give full play to its catalytic combustion-supporting effect;

[0021] The leavening agent is potassium chloride, which explodes at high temperatures, increasing the air flow in the coal seam and promoting combustion;

[0022] The detergent uses calcium oxide, which helps neutralize the acidic substances produced during coal combustion;

[0023] During the combustion process, the sulfur-fixing agent can absorb the sulfur dioxide produced during the combustion process and solidify it, achieving the effect of solidification and dust reduction, thereby reducing and suppressing the concentration of flue gas emissions;

[0024] The dispersant uses alkyl glycoside to make the various elements in the coal-saving agent evenly mixed, thereby enhancing the effect of the coal-saving agent;

[0025] The preservative is sodium nitrite and the stabilizer is inorganic salt, which can effectively protect the furnace body and extend the service life of the boiler.

[0026] 2. When the product enters the combustion layer, the flame will rise and the color will become lighter, increasing the combustion intensity and density. As time goes by, the furnace temperature will rise, the steam volume and boiler output will increase, the burning coal layer will expand, the slag will become loose, the residual carbon content will decrease, the flame and furnace temperature will rise, the boiler wall scale will gradually fall off, and the thermal efficiency will increase, thereby saving coal.

[0027] 3. The coal produced by the new type of calorific value-enhancing agent increases calorific value and does not cause ignition difficulties due to low temperature. It is easy to transport and is not easily crushed during transportation, which reduces the difficulty of operation. The proportion can be adjusted at any time according to demand. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The present invention adopts the following technical solution: a method for preparing a coal-saving calorie extracting agent, wherein the raw materials are mainly composed of a purified-grade polymer nano-metal composite agent KKXX, EDTA, small molecule water and a rare earth nano-metal composite agent;

[0030] Among them, the polymer nanometal composite KKXX is mainly composed of halloysite nanotubes (HNTs), polyethyleneimine (PEI) and polyamide dendrimer (PAMAM), and also contains a small amount of carbon nanotubes, polylactic acid-glycolic acid copolymer and oleic acid;

[0031] The rare earth nano-metal composite agent consists of an emulsifier, a combustion improver, a penetrant, a bulking agent, a detergent, a dispersant, a sulfur-fixing agent, a preservative and a stabilizer.

[0032] The preparation method comprises at least the following steps:

[0033] S1: pouring small molecule water, polymer nano-metal composite KKXX, EDTA and rare earth nano-metal composite into a constant temperature and pressure container in sequence, stirring them evenly, and adding a certain amount of pure water during the stirring process to obtain a mixture;

[0034] S2: The mixture A is allowed to stand for 1 hour to allow for a preliminary reaction, and then a flocculant is added to precipitate the particles in the suspension, and the suspension is removed to obtain a fluid mixture;

[0035] S3: adding lime water while stirring the convection mixture; after the stirring is completed, the mixture is allowed to stand for 0.5 hours, and the suspension is taken out to obtain a card-lifting agent.

[0036] In S1, the pressure is controlled between 10 KPa and 20 KPa, the stirring speed is 300 r / min, and the duration is 1.5 h.

[0037] EDTA preparation steps:

[0038] Sodium cyanide solution, liquid alkali solution, and ethylenediamine are placed in a condensation reaction kettle, heated to 88°C to 95°C, and formaldehyde and the remaining sodium cyanide solution are added dropwise. After the reaction is complete, hydrogen peroxide is added for decolorization to obtain a condensation material. The condensation material is then placed in an acidification reaction kettle, hydrochloric acid is added to a pH of 2.1-4, and the precipitated crystals are centrifuged to obtain EDTA wet material, which is then air-dried to obtain EDTA.

[0039] In the step of preparing the card-extracting agent, the pH value is controlled between 6.5 and 7.8.

[0040] Quicklime reacts with water to become slaked lime. The main component of slaked lime is Ca(OH)2, which can be called calcium hydroxide. Slaked lime is mixed into lime slurry, lime paste, etc., and is used as a coating material and brick and tile adhesive.

[0041] The emulsifier used is alkylphenol polyoxyethylene ether, the combustion aid is a mixture of potassium permanganate and industrial salt, the penetrant is sodium citrate, the leavening agent is potassium chloride, the cleaning agent is calcium oxide, the dispersant is alkyl glycoside, the preservative is sodium nitrite, the stabilizer is inorganic salt, and the sulfur-fixing agent is sodium-based sulfur-fixing agent, such as sodium hydroxide and sodium carbonate.

[0042] Among them, depending on the moisture content of the coal, the calcium carbonate extracting agent is diluted at a ratio of agent to water = 1:8.

[0043] The above description of the present invention and its embodiments is non-limiting, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above description and, without departing from the purpose of the present invention, designs a structure and embodiment similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. A method for preparing a coal-saving calorie-removing agent, wherein the raw materials are mainly composed of a purified-grade polymer nano-metal composite agent KKXX, EDTA, small molecule water, and a rare earth nano-metal composite agent; in, The polymer nanometal composite KKXX is mainly composed of halloysite nanotubes (HNTs), polyethyleneimine (PEI) and polyamide dendrimer (PAMAM), and also contains a small amount of carbon nanotubes, polylactic acid-co-glycolic acid and oleic acid. The rare earth nano-metal composite agent is composed of an oxidant, a catalytic agent, a combustion aid, a penetrant, a bulking agent, a cleaning agent, a dispersant and a stabilizer.

2. The method for preparing a coal-saving caloric acid extracting agent according to claim 1, characterized in that: The preparation method of the card-lifting agent comprises at least the following steps: S1: pouring small molecule water, polymer nano-metal composite KKXX, EDTA and rare earth nano-metal composite into a constant temperature and pressure container in sequence, stirring them evenly, and adding a certain amount of pure water during the stirring process to obtain a mixture; S2: The mixture A is allowed to stand for 1 hour to allow for a preliminary reaction, and then a flocculant is added to precipitate the particles in the suspension, and the suspension is removed to obtain a fluid mixture; S3: adding lime water while stirring the convection mixture; after the stirring is completed, the mixture is allowed to stand for 0.5 hours, and the suspension is taken out to obtain a card-lifting agent.

3. The method for preparing a coal-saving and calcium-extracting agent according to claim 1, characterized in that: In S1, the pressure is controlled between 10 KPa and 20 KPa, the stirring speed is 300 r / min, and the duration is 1.5 h.

4. The method for preparing a coal-saving and calcium-extracting agent according to claim 1, wherein: EDTA preparation steps: Sodium cyanide solution, liquid alkali solution, and ethylenediamine are placed in a condensation reaction kettle, heated to 88°C to 95°C, and formaldehyde and the remaining sodium cyanide solution are added dropwise. After the reaction is complete, hydrogen peroxide is added for decolorization to obtain a condensation material. The condensation material is then placed in an acidification reaction kettle, hydrochloric acid is added to a pH of 2.1-4, and the precipitated crystals are centrifuged to obtain EDTA wet material, which is then air-dried to obtain EDTA.

5. The method for preparing a coal-saving and calcium-extracting agent according to claim 1, wherein: In the step of preparing the card-extracting agent, the pH value is controlled between 6.5 and 7.8.