System for producing water glass with different concentrations by vaporizing slag wet method

Abstract

The invention discloses a system for producing water glass with different concentrations by a vaporized slag wet process, which comprises a low-concentration water source glass preparation module, a preheater, a low-concentration water glass raw liquid preparation module, a high-concentration water glass raw liquid preparation module, a high-concentration water glass raw liquid preparation module, a high-concentration water glass raw liquid preparation module and a high-concentration water glass raw liquid preparation module, the preheater is used for receiving the low-concentration water glass stock solution generated by the low-concentration water source glass preparation module and preheating the low-concentration water glass stock solution, the first flash evaporation module is used for receiving the low-concentration water glass stock solution preheated by the preheater and carrying out heating and flash evaporation treatment on the low-concentration water glass stock solution, and the second flash evaporation module is used for carrying out flash evaporation treatment on the low-concentration water glass stock solution. And the flash evaporation module is used for receiving the water glass stock solution concentrated by the first flash evaporation module or receiving the water glass stock solution concentrated by the second flash evaporation module, and heating and flashing the water glass stock solution. The activated gasified slag is used as a raw material, water glass products with various concentrations applied to different industries can be produced, resource utilization of the gasified slag is effectively achieved, and various concentrations required by the current market can be covered.

Description

Technical Field

[0001] The invention relates to the technical field of vaporized slag recycling, in particular to a system for wet-processing water glass with different concentrations using vaporized slag. Background Art

[0002] Gasification slag is a solid residue produced in the process of coal gasification, and the total amount produced in China has reached 71 million tons in 2021. These solid wastes are huge in quantity, and landfill storage requires a lot of land resources, which has a certain impact on the ecological environment.

[0003] Through testing and analysis, it is found that the gasified slag is mainly composed of silicon, aluminum oxides and carbon. Through reasonable processing methods, it can be used as an effective resource to achieve the purpose of turning waste into treasure and realizing sustainable development of the environment. Therefore, a system for wet production of water glass with different concentrations by gasified slag is designed. Summary of the invention

[0004] In view of the defects or shortcomings of the system for wet production of water glass from vaporized slag, the purpose of the present invention is to provide a system for wet production of water glass of different concentrations from vaporized slag, which can produce water glass of various concentrations for use in different industries, effectively realize the resource utilization of vaporized slag, and can cover various concentrations required by the current market.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: The present invention provides a system for producing water glass with different concentrations by wet method using vaporized slag, comprising: a low-concentration water source glass preparation module, used for reacting activated vaporized slag with sodium hydroxide solution / potassium hydroxide solution and filtering to produce low-concentration water glass stock solution; a preheater, used for receiving the low-concentration water glass stock solution produced by the low-concentration water source glass preparation module and preheating it; a first flash evaporation module, used for receiving the low-concentration water glass stock solution preheated by the preheater, heating it and flash evaporating it; a second flash evaporation module, used for receiving the concentrated water glass stock solution from the first flash evaporation module or the concentrated water glass stock solution from the second flash evaporation module, heating it and flash evaporating it; a first steam condensation module, used for receiving the steam output by the preheater and condensing it; a second steam condensation module, used for receiving the steam generated by the second flash evaporation module and condensing it; the low-concentration water source glass preparation module is provided with a reactor for preparing sodium silicate solution / potassium silicate solution, the reactor The generated sodium silicate solution / potassium silicate solution is pumped into a plate-and-frame filter press for filtering the sodium silicate solution / potassium silicate solution by pumping, and the liquid outlet on the plate-and-frame filter press is connected to the liquid inlet on the water glass stock solution storage tank through a conveying pipeline; the first flash evaporation module is provided with a first heater, and the first heater is used to receive and heat the low-concentration water glass stock solution preheated by the preheater, the liquid outlet of the first heater is connected to the liquid inlet on the first flash evaporation tower through a conveying pipeline, and the first flash evaporation tower is used to receive the low-concentration water glass stock solution heated by the first heater and flash-evaporate it; the second flash evaporation module is provided with a second heater, the liquid outlet of the second heater is connected to the liquid inlet on the second flash evaporation tower through a conveying pipeline, the second heater is used to receive and heat the water glass stock solution concentrated by the first flash evaporation tower or the water glass stock solution concentrated by the second flash evaporation tower, and the second flash evaporation tower is used to receive and flash-evaporate the water glass stock solution heated by the second heater.

[0006] Preferably, the first steam condensation module is provided with a first condenser for condensing steam, the air outlet on the first condenser is connected to the air inlet on the first condensation water tank through a conveying pipe, the first condensation water tank is provided with a vacuum tube, and the other end of the vacuum tube is provided with a vacuum pump, and the liquid outlet on the first condensation water tank pumps the condensed water in the first condensation water tank to a device for preparing sodium hydroxide solution / potassium hydroxide solution for reuse.

[0007] Preferably, the second steam condensation module is provided with a second condenser for condensing steam, the air outlet on the second condenser is connected to the air inlet on the second condensation water tank through a conveying pipe, the second condensation water tank is provided with a vacuum tube, and the other end of the vacuum tube is provided with a vacuum pump, and the liquid outlet on the second condensation water tank pumps the condensed water in the second condensation water tank to a device for preparing sodium hydroxide solution / potassium hydroxide solution for reuse.

[0008] Preferably, the liquid outlet on the water glass stock liquid storage tank pumps the low-concentration water glass stock liquid in the water glass stock liquid storage tank into the preheater by pumping and preheats it.

[0009] Preferably, the liquid outlet on the preheater is connected to the liquid inlet on the first heater through a delivery pipe, the gas outlet on the first flash tower is connected to the gas inlet on the preheater through a delivery pipe, and the gas outlet on the preheater is connected to the gas inlet on the first condenser through a delivery pipe.

[0010] Preferably, the liquid outlet on the first flash tower pumps out the finished water glass stock solution that has undergone a flash evaporation or pumps the water glass stock solution that has undergone a flash evaporation into the second heater.

[0011] Preferably, the liquid outlet on the second flash tower pumps out the finished water glass stock solution that has undergone two or more flash distillations by pumping, or pumps the water glass stock solution that has undergone two or more flash distillations into the second heater by pumping.

[0012] Preferably, the gas outlet on the second flash tower is connected to the gas inlet on the second condenser through a delivery pipeline.

[0013] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects: In the present invention, gasified slag as solid waste can be used to produce water glass products of various concentrations for use in different industries, thereby effectively realizing the resource utilization of gasified slag and covering various concentrations required by the current market. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0015] Figure 1 It is a schematic structural diagram of a system for producing water glass with different concentrations by a vaporized slag wet process provided by the present invention.

[0016] Figure 2It is a schematic diagram of the structure of a low-concentration water source glass preparation module provided by the present invention.

[0017] Figure 3 It is a schematic structural diagram of the first steam condensation module provided by the present invention.

[0018] Figure 4 It is a schematic structural diagram of the first flash evaporation module provided by the present invention.

[0019] Figure 5 It is a schematic diagram of the structure of the second flash evaporation module provided by the present invention.

[0020] Figure 6 It is a schematic structural diagram of the second steam condensation module provided by the present invention.

[0021] In the figure: 100. Low-concentration water source glass preparation module; 101. Reactor; 102. Plate and frame filter press; 103. Water glass stock solution storage tank; 200, preheater; 300, first steam condensation module; 301, first condenser; 302, first condensation water tank; 400, first flash module; 401, first heater; 402, first flash tower; 500, second flash module; 501, second heater; 502, second flash tower; 600, second steam condensation module; 601, second condenser; 602, second condensate tank. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] like Figure 1-6 As shown, a system for producing water glass with different concentrations by a vaporized slag wet process comprises: The low-concentration water glass preparation module 100 is used to react the activated gasified slag with a sodium hydroxide solution / potassium hydroxide solution and filter press to produce a low-concentration water glass stock solution; A preheater 200 is used to receive the low-concentration water glass stock solution produced by the low-concentration water source glass preparation module 100 and preheat it; The first flash evaporation module 400 is used to receive the low-concentration water glass stock solution preheated by the preheater 200 and heat and flash-evaporate the low-concentration water glass stock solution; The second flash evaporation module 500 is used to receive the concentrated water glass stock solution from the first flash evaporation module 400 or receive the concentrated water glass stock solution from the second flash evaporation module 500 and heat and flash evaporate it; The first steam condensation module 300 is used to receive the steam output by the preheater 200 and condense it; The second steam condensation module 600 is used to receive the steam generated by the second flash evaporation module 500 and condense it; The low-concentration water source glass preparation module 100 is provided with a reactor 101 for preparing a sodium silicate solution / potassium silicate solution. The activated gasified slag is used as a raw material and reacted with a sodium hydroxide solution / potassium hydroxide solution in the reactor 101 by stirring and heating to generate a sodium silicate solution / potassium silicate solution. The reactor 101 pumps the generated sodium silicate solution / potassium silicate solution to a plate-frame filter press 102 for filtering the sodium silicate solution / potassium silicate solution. The plate-frame filter press 102 filters the sodium silicate solution / potassium silicate solution. The obtained filtrate is the initial low-concentration water glass stock solution. The initial low-concentration water glass stock solution has a concentration of about 15%-20% and can be directly used as a product. The liquid outlet on the plate-frame filter press 102 is connected to the liquid inlet on the water glass stock solution storage tank 103 through a conveying pipeline. The plate-frame filter press 102 can convey the filtered sodium silicate solution / potassium silicate solution to the water glass stock solution storage tank 103 through a conveying pipeline. The first flash evaporation module 400 is provided with a first heater 401, and the first heater 401 is used to receive and heat the low-concentration water glass stock solution preheated by the preheater 200, the liquid outlet of the first heater 401 is connected to the liquid inlet of the first flash evaporation tower 402 through a conveying pipeline, and the first flash evaporation tower 402 is used to receive the low-concentration water glass stock solution heated by the first heater 401 and flash evaporation it. After the first flash evaporation of the low-concentration water glass stock solution, a water glass stock solution with a concentration of 30%-40% can be obtained, i.e., the finished product 1. This concentration of water glass stock solution is the most widely used; The second flash evaporation module 500 is provided with a second heater 501, and the liquid outlet of the second heater 501 is connected to the liquid inlet on the second flash evaporation tower 502 through a conveying pipeline. The second heater 501 is used to receive and heat the concentrated water glass stock solution brought by the first flash evaporation tower 402 or the concentrated water glass stock solution brought by the second flash evaporation tower 502, and the second flash evaporation tower 502 is used to receive the water glass stock solution heated by the second heater 501 and flash evaporate it. The second flash evaporation tower 502 can perform a second flash evaporation on the water glass that has been flashed once. The concentration of the water glass stock solution after the second flash evaporation can reach 40%-50%, which can meet the market demand for high-concentration water glass.

[0026] The first steam condensation module 300 is provided with a first condenser 301 for condensing steam. The air outlet on the first condenser 301 is connected to the air inlet on the first condensation water tank 302 through a conveying pipe. The first condensation water tank 302 is provided with a vacuum pipe, and the other end of the vacuum pipe is provided with a vacuum pump. The vacuum pump can evacuate the inside of the first condensation water tank 302 to make the steam more easily condensed. The liquid outlet on the first condensation water tank 302 pumps the condensed water in the first condensation water tank 302 to the equipment for preparing sodium hydroxide solution / potassium hydroxide solution for reuse.

[0027] The second steam condensation module is provided with a second condenser 601 for condensing steam. The air outlet on the second condenser 601 is connected to the air inlet on the second condensation water tank 602 through a conveying pipe. The second condensation water tank 602 is provided with a vacuum tube, and the other end of the vacuum tube is provided with a vacuum pump. The vacuum pump can evacuate the second condensation water tank 602 to make the steam more easily condensed. The liquid outlet on the second condensation water tank 602 pumps the condensed water in the second condensation water tank 602 to the equipment for preparing sodium hydroxide solution / potassium hydroxide solution for reuse.

[0028] The liquid outlet on the water glass stock liquid storage tank 103 pumps the low-concentration water glass stock liquid in the water glass stock liquid storage tank 103 into the preheater 200 to preheat it.

[0029] The liquid outlet on the preheater 200 is connected to the liquid inlet on the first heater 401 through a conveying pipe. The first heater 401 can heat the preheated water glass stock solution. The air outlet on the first flash tower 402 is connected to the air inlet on the preheater 200 through a conveying pipe. The air outlet on the preheater 200 is connected to the air inlet on the first condenser 301 through a conveying pipe. Since the air outlet on the first flash tower 402 is connected to the air inlet on the preheater 200 through a conveying pipe, the air outlet on the preheater 200 is connected to the air inlet on the first condenser 301 through a conveying pipe. In this process, the water glass stock solution is preheated by the regenerated steam generated by the first flash tower 402, so as to achieve the purpose of energy saving and consumption reduction. The first condenser 301 condenses the steam discharged from the preheater 200 and generates condensed water. The generated condensed water can be used for the preparation of the raw material solution used in the early production, thereby reducing the amount of water added once.

[0030] The liquid outlet on the first flash tower 402 pumps out the finished water glass stock solution that has undergone a flash evaporation or pumps the water glass stock solution that has undergone a flash evaporation into the second heater 501. When the finished water glass stock solution that has undergone a flash evaporation is pumped out, a water glass stock solution with a concentration of 30%-40% can be obtained in this process. When the water glass stock solution that has undergone a flash evaporation is pumped into the second heater 501, the water glass stock solution is flash evaporated for the second time.

[0031] The liquid outlet on the second flash tower 502 pumps out the finished water glass stock solution that has undergone two or more flash distillations, or pumps the water glass stock solution that has undergone two or more flash distillations into the second heater 501. When the finished water glass stock solution that has undergone two flash distillations is pumped out, 40%-50% water glass stock solution can be obtained in the process. When the water glass stock solution that has undergone two or more flash distillations is pumped into the second heater 501, a water glass stock solution with a higher concentration can be obtained. Therefore, if the concentration of the water glass stock solution does not meet the standard by detecting the concentration of the water glass stock solution, the water glass stock solution can be flashed multiple times through a circulation technology, and then heated and evaporated in a circulation manner to achieve the target concentration.

[0032] The air outlet on the second flash tower 502 is connected to the air inlet on the second condenser 601 through a conveying pipeline. The second condenser 601 can condense the steam discharged from the second flash tower 502 and produce condensed water. The produced condensed water can be used for the preparation of the raw material solution used in the early production, thereby reducing the amount of water added at one time.

[0033] When in use, the staff will use the activated gasified slag as the raw material to react with the sodium hydroxide solution / potassium hydroxide solution in the reactor 101 by stirring and heating to generate a sodium silicate solution / potassium silicate solution. The reactor 101 will pump the generated sodium silicate solution / potassium silicate solution to the plate and frame filter press 102 for filtering the sodium silicate solution / potassium silicate solution. The plate and frame filter press 102 will filter the sodium silicate solution / potassium silicate solution, and the obtained filtrate is the initial low-concentration water glass stock solution. The concentration of the initial low-concentration water glass stock solution is about 15%-20%, and it can be directly used as a product. Concentrated water glass passes through the preheater 200 and the first heater 401 in turn and enters the first flash tower 402. By controlling the initial heating amount and vacuum degree, water glass with a concentration of 30%-40% can be obtained. This concentration of water glass is the most widely used. In this process, the flash regeneration steam is transported to the preheater to preheat the water glass stock solution, which can effectively save energy and achieve the purpose of energy saving and consumption reduction. The first condenser 301 condenses the steam discharged from the preheater 200 and generates condensed water. The generated condensed water can be used as the preparation of the raw material solution used in the initial production, thereby reducing the amount of water added at one time. The water glass stock solution that has undergone a flash evaporation is transported into the second heater 501 through a pump. The water glass stock solution is further heated and enters the second flash evaporation tower 502 for a second flash evaporation. Through the second flash evaporation, the concentration can reach 40%-50%, which can meet the market demand for high-concentration water glass. If the concentration of the water glass stock solution is not up to the standard, the water glass stock solution can be flashed multiple times through a circulation technology, and then heated and evaporated in a circulation manner to achieve the target concentration. The second condenser 601 can condense the steam discharged from the second flash evaporation tower 502 and produce condensed water. The produced condensed water can be used for the preparation of the raw material solution used in the early production, thereby reducing the amount of water added once.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A system for producing water glass with different concentrations by a vaporized slag wet process, characterized in that: include: A low-concentration water-source glass preparation module (100) is used to react the activated gasified slag with a sodium hydroxide solution / potassium hydroxide solution and filter press to produce a low-concentration water-source glass stock solution; A preheater (200) is used to receive the low-concentration water-source glass stock solution produced by the low-concentration water-source glass preparation module (100) and preheat the low-concentration water-source glass stock solution; A first flash evaporation module (400) is used to receive the low-concentration water-source glass stock solution preheated by the preheater (200) and to heat and flash-evaporate the solution; A second flash evaporation module (500) is used to receive the concentrated water-source glass stock solution produced by the first flash evaporation module (400) or receive the concentrated water-source glass stock solution produced by the second flash evaporation module (500) and heat and flash-evaporate the concentrated water-source glass stock solution; A first steam condensation module (300), used for receiving the steam output by the preheater (200) and performing condensation processing on the steam; A second steam condensation module (600), used for receiving the steam generated by the second flash evaporation module (500) and performing condensation processing on the steam; The low-concentration water source glass preparation module (100) is provided with a reaction kettle (101) for preparing a sodium silicate solution / potassium silicate solution, the reaction kettle (101) pumps the generated sodium silicate solution / potassium silicate solution into a plate-frame filter press (102) for filtering the sodium silicate solution / potassium silicate solution, and the liquid outlet on the plate-frame filter press (102) is connected to the liquid inlet on the water glass stock solution storage tank (103) via a delivery pipeline; The first flash evaporation module (400) is provided with a first heater (401), and the first heater (401) is used to receive and heat the low-concentration water-source glass stock solution preheated by the preheater (200); the liquid outlet of the first heater (401) is connected to the liquid inlet of the first flash evaporation tower (402) through a delivery pipeline, and the first flash evaporation tower (402) is used to receive and flash-evaporate the low-concentration water-source glass stock solution heated by the first heater (401); The second flash evaporation module (500) is provided with a second heater (501), the liquid outlet of the second heater (501) is connected to the liquid inlet of the second flash evaporation tower (502) through a delivery pipeline, the second heater (501) is used to receive and heat the concentrated water-source glass stock solution from the first flash evaporation tower (402) or the concentrated water-source glass stock solution from the second flash evaporation tower (502), and the second flash evaporation tower (502) is used to receive and flash-evaporate the water-source glass stock solution heated by the second heater (501).

2. The system for producing water glass with different concentrations by wet process of vaporized slag according to claim 1, characterized in that: The first steam condensation module (300) is provided with a first condenser (301) for condensing steam, the air outlet on the first condenser (301) is connected to the air inlet on the first condensation water tank (302) via a delivery pipeline, the first condensation water tank (302) is provided with a vacuum pipe, and the other end of the vacuum pipe is provided with a vacuum pump, and the liquid outlet on the first condensation water tank (302) pumps the condensed water in the first condensation water tank (302) to a device for preparing sodium hydroxide solution / potassium hydroxide for reuse.

3. The system for producing water glass with different concentrations by wet process of vaporized slag according to claim 1, characterized in that: The second steam condensation module (600) is provided with a second condenser (601) for condensing steam, the air outlet on the second condenser (601) is connected to the air inlet on the second condensation water tank (602) through a conveying pipe, the second condensation water tank (602) is provided with a vacuum pipe, and the other end of the vacuum pipe is provided with a vacuum pump, and the liquid outlet on the second condensation water tank (602) pumps the condensed water in the second condensation water tank (602) to a device for preparing sodium hydroxide solution / potassium hydroxide for reuse.

4. The system for producing water glass with different concentrations by the vaporized slag wet process according to claim 1, characterized in that: The liquid outlet on the water glass stock liquid storage tank (103) pumps the low-concentration water glass stock liquid in the water glass stock liquid storage tank (103) into the preheater (200) to preheat the low-concentration water glass stock liquid.

5. The system for producing water glass with different concentrations by wet process of vaporized slag according to claim 1, characterized in that: The liquid outlet on the preheater (200) is connected to the liquid inlet on the first heater (401) through a delivery pipe, the gas outlet on the first flash tower (402) is connected to the gas inlet on the preheater (200) through a delivery pipe, and the gas outlet on the preheater (200) is connected to the gas inlet on the first condenser (301) through a delivery pipe.

6. The system for producing water glass with different concentrations by the vaporized slag wet process according to claim 1, characterized in that: The liquid outlet on the first flash tower (402) pumps out the finished water glass stock solution that has undergone a flash evaporation or pumps the water glass stock solution that has undergone a flash evaporation into the second heater (501) through a pumping method.

7. The system for producing water glass with different concentrations by wet process of vaporized slag according to claim 1, characterized in that: The liquid outlet on the second flash tower (502) pumps out the finished water glass stock solution that has undergone two or more flash evaporations by pumping, or pumps the water glass stock solution that has undergone two or more flash evaporations into the second heater (501) by pumping.

8. The system for producing water glass with different concentrations by wet process of vaporized slag according to claim 1, characterized in that: The gas outlet on the second flash tower (502) is connected to the gas inlet on the second condenser (601) through a delivery pipeline.

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