Ceramic powder energy-saving drying system
By combining an electric heating rotary chamber and a hot air rotary chamber with an energy-saving drying system of a heat pump and a heat exchanger, and utilizing off-peak electricity and exhaust waste heat, the problems of high energy consumption and serious pollution in drying ceramic powders are solved, achieving energy-saving, consumption-reducing and environmentally friendly drying effects.
Patent Information
- Application Number
- CN202422464033.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-12
AI Technical Summary
Existing ceramic powder drying technology consumes a lot of energy, pollutes the environment, and has high costs.
The energy-saving drying system consists of an electric heating rotary chamber, a hot air rotary chamber, a heat pump and multiple heat exchangers. It uses low-peak electricity and exhaust waste heat, combined with electromagnetic heating and hot air heating, to achieve graded drying.
It reduces energy consumption, environmental pollution and production costs.
Smart Images
Figure CN223345856U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ceramic raw material preparation, in particular to an energy-saving drying system for ceramic powder. Background Art
[0002] In the ceramic production process, ceramic powders require drying, rapidly reducing their moisture content from 21% to 8%. Existing methods involve drying wet ceramic powders with a moisture content of 21% in a spray tower using hot air at 600°C to achieve this reduction. This process is not only costly (it consumes significant amounts of natural gas), but also results in the direct emission of large amounts of high-temperature exhaust gas, wasting energy and polluting the environment. This also leads to high production costs, necessitating urgent improvements. Utility Model Content
[0003] The purpose of this utility model is to address the deficiencies in the prior art and provide a ceramic powder energy-saving drying system that fully utilizes cheap off-peak electricity and exhaust waste heat to reduce energy consumption and production costs.
[0004] The technical solution adopted by the utility model is: a ceramic powder energy-saving drying system, comprising an electric heating rotary chamber, a hot air rotary chamber, a first heat exchanger, a heat pump and a second heat exchanger; the electric heating rotary chamber is connected to the hot air rotary chamber through a conveying device, and the discharge outlet of the hot air rotary chamber is connected to the first heat exchanger; the hot water outlet of the first heat exchanger is connected to the hot side heat source inlet of the heat pump, and the hot side cold source outlet of the heat pump is connected to the cold water inlet of the first heat exchanger, forming a first heat source heat exchange cycle; the cold side heat source outlet of the heat pump is connected to the hot water inlet of the second heat exchanger, and the cold water outlet of the second heat exchanger is connected to the cold side cold source inlet of the heat pump, forming a second heat source heat exchange cycle; the air input pipe is connected to the air inlet of the second heat exchanger, the air outlet of the second heat exchanger is connected to the inlet of the electric heater, and the outlet of the electric heater is connected to the hot air rotary chamber.
[0005] A second valve is provided between the second heat exchanger and the electric heater;
[0006] A fourth valve is provided between the electric heater and the hot air rotating chamber.
[0007] The outlet of the second heat exchanger is connected to the hot air inlet of the third heat exchanger, which is in turn connected to the hot air recirculation chamber. The cold oil outlet of the third heat exchanger is connected to the inlet of a thermal oil tank, which is then connected to the hot oil inlet of the third heat exchanger via a variable frequency oil pump, forming a thermal oil heat storage and heat exchange cycle. An electric heating rod is installed in the thermal oil tank.
[0008] A first valve is provided between the second heat exchanger and the third heat exchanger.
[0009] A third valve is provided between the third heat exchanger and the hot air rotating chamber.
[0010] In general, compared with the existing technology, the present invention has the following beneficial effects: avoiding the high temperature and easy overheating of electromagnetic heating, making full use of exhaust waste heat, reducing energy consumption; making full use of off-peak electricity, reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0012] Figure 1 This is the process flow chart of this utility model. DETAILED DESCRIPTION
[0013] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation to the present invention.
[0014] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0015] An energy-saving drying system for ceramic powder, such as Figure 1As shown, it includes an electric heating rotary chamber 1, a hot air rotary chamber 3, a first heat exchanger, a heat pump, and a second heat exchanger. The electric heating rotary chamber 1 uses electromagnetic heating, with an electromagnetic coil 2 installed on the outer side of its side wall. It also has an inlet for wet materials with a moisture content of 21%. The electric heating rotary chamber is connected to the hot air rotary chamber 3 via a conveying device 1. Ceramic powder dried in the electric heating rotary chamber 1 to a moisture content of approximately 13% is fed into the hot air rotary chamber 1 and further dried to a moisture content of 8% before being discharged. The exhaust outlet of the hot air rotary chamber 3 is connected to the first heat exchanger. The high-temperature exhaust gas discharged from the hot air rotary chamber 3, which reaches a temperature of up to 80°C, absorbs heat energy in the first heat exchanger, and is then cooled to 50°C before being discharged, reducing environmental pollution. The hot water outlet of the first heat exchanger is connected to the hot side heat source inlet of the heat pump, and the hot side cold source outlet of the heat pump is connected to the cold water inlet of the first heat exchanger, forming a first heat source heat exchange cycle. The heat exchange medium in the first heat source heat exchange cycle is preferably water. After absorbing heat from the hot exhaust gas, the water in the first heat exchanger heats up to 50°C and enters the hot-side heat source inlet of the heat pump through the hot water outlet. After heat exchange within the heat pump, the temperature drops to 30°C and is output from the hot-side cold source outlet of the heat pump to the cold water inlet of the first heat exchanger. The cold-side heat source outlet of the heat pump is connected to the hot water inlet of the second heat exchanger, and the cold water outlet of the second heat exchanger is connected to the cold-side cold source inlet of the heat pump, forming a second heat source heat exchange cycle. The heat exchange medium in the second heat source heat exchange cycle is preferably water. After heat exchange, the temperature of the heat exchange medium at the cold water outlet of the second heat exchanger drops to 70°C and enters the cold-side cold source inlet of the heat pump through the cold water outlet. After heat exchange within the heat pump, the temperature rises to 90°C and is output from the cold-side heat source outlet of the heat pump to the hot water inlet of the second heat exchanger. The air input pipe is connected to the air inlet of the second heat exchanger, the air outlet of the second heat exchanger is connected to the inlet of the electric heater, and the outlet of the electric heater is connected to the hot air rotary chamber. 180°C hot air is fed into the hot air rotary chamber 3 to heat and dry the ceramic powder inside. The cold air, which is around 20°C, is heated by the second heat exchanger to form 80°C hot air. This air is then further heated by the electric heater to form 180°C hot air for use. A second valve is installed between the second heat exchanger and the electric heater, and a fourth valve is installed between the electric heater and the hot air rotary chamber.
[0016] The outlet of the second heat exchanger is connected to the hot air inlet of the third heat exchanger, which is connected to the hot air recirculation chamber. The third heat exchanger heats the 80°C hot air to 180°C, generating 180°C hot air for input into the hot air recirculation chamber. The cold oil outlet of the third heat exchanger is connected to the inlet of the thermal oil tank, which is connected to the hot oil inlet of the third heat exchanger via a variable frequency oil pump, forming a thermal oil heat storage and heat exchange cycle. An electric heating rod is installed in the thermal oil tank to heat the thermal oil during low-temperature periods at night. The thermal oil in the tank is heated by the electric heating rod to a temperature of 350°C. After entering the second heat exchanger for heating, the temperature drops to 230°C before being re-introduced into the thermal oil tank for heating. A first valve is located between the second and third heat exchangers, and a third valve is located between the third heat exchanger and the hot air recirculation chamber. Function selection is achieved by opening and closing the valves.
[0017] At night, when electricity prices are relatively low, the first and third valves are closed, while the second and fourth valves are open. The electric heater operates to directly heat the drying air. Simultaneously, the electric heating rod in the thermal oil tank also operates to heat the thermal oil for heat storage. During the day, the first and third valves are opened, while the second and fourth valves are closed. The electric heater and the electric heating rod in the thermal oil tank are deactivated. The third heat exchanger utilizes the heat from the thermal oil to generate hot air for drying, significantly reducing costs.
[0018] The above-mentioned structure of the utility model uses two drying methods, electromagnetic heating and hot air heating, to grade and dry the ceramic powder. The electromagnetic heating temperature in the electric heating rotary chamber is high and prone to overheating. Therefore, electromagnetic heating is used when the material moisture drops from 21% to 13%, and hot air heating is used when the material moisture drops from 13% to 8%. To fully utilize the waste heat from the exhaust, the first heat exchanger absorbs the waste heat from the rotary kiln exhaust, heating water from 30°C to 50°C and feeding it into the heat pump. The heat pump absorbs this heat and heats the water from 70°C to 90°C. The hot air is first heated to 80°C by the second heat exchanger and then raised to 180°C by the electric heater, fully utilizing the waste heat. Low-peak electricity is fully utilized to heat the hot air. The electric heater operates at night, and the electric heating rods in the thermal oil tank also operate. Both are shut down during the day. The heat stored in the thermal oil tank, heated to 350°C at night, is used to generate hot air. That is to say, during the day, the hot air is heated from 80°C to 180°C by the heat exchanger 3 using the 350°C heat transfer oil.
[0019] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A ceramic powder energy-saving drying system, characterized in that: It includes an electric heating rotary chamber, a hot air rotary chamber, a first heat exchanger, a heat pump and a second heat exchanger; the electric heating rotary chamber is connected to the hot air rotary chamber through a conveying device, and the discharge outlet of the hot air rotary chamber is connected to the first heat exchanger; the hot water outlet of the first heat exchanger is connected to the hot side heat source inlet of the heat pump, and the hot side cold source outlet of the heat pump is connected to the cold water inlet of the first heat exchanger, forming a first heat source heat exchange cycle; the cold side heat source outlet of the heat pump is connected to the hot water inlet of the second heat exchanger, and the cold water outlet of the second heat exchanger is connected to the cold side cold source inlet of the heat pump, forming a second heat source heat exchange cycle; the air input pipe is connected to the air inlet of the second heat exchanger, the air outlet of the second heat exchanger is connected to the inlet of the electric heater, and the outlet of the electric heater is connected to the hot air rotary chamber.
2. The energy-saving ceramic powder drying system according to claim 1, characterized in that: A second valve is provided between the second heat exchanger and the electric heater.
3. The energy-saving ceramic powder drying system according to claim 2, characterized in that: A fourth valve is provided between the electric heater and the hot air rotating chamber.
4. The energy-saving ceramic powder drying system according to claim 3, characterized in that: The outlet of the second heat exchanger is connected to the hot air inlet of the third heat exchanger, and the hot air outlet of the third heat exchanger is connected to the hot air rotation chamber.
5. The energy-saving ceramic powder drying system according to claim 4, characterized in that: The cold oil outlet of the third heat exchanger is connected to the inlet of the thermal oil tank, and the outlet of the thermal oil tank is connected to the hot oil inlet of the third heat exchanger through a variable frequency oil pump, forming a thermal oil heat storage and heat exchange cycle; an electric heating rod is installed in the thermal oil tank.
6. The energy-saving ceramic powder drying system according to claim 5, characterized in that: A first valve is provided between the second heat exchanger and the third heat exchanger.
7. The energy-saving ceramic powder drying system according to claim 6, characterized in that: A third valve is provided between the third heat exchanger and the hot air rotating chamber.