Dissolving kettle for waste heat recovery
By designing a dissolution kettle system for waste heat recovery and using the two kettles to exchange heat in series, the problem of wastewater and heat energy not being effectively treated in the co-precipitation method is solved, and efficient energy utilization and environmental protection are achieved.
Patent Information
- Application Number
- CN202421215060.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-30
AI Technical Summary
During the preparation of ZrO2 powder, the cooling industrial wastewater and thermal energy generated by the co-precipitation method are not effectively treated, resulting in environmental pollution and energy waste.
A dissolution kettle system for waste heat recovery is designed. The liquid temperature difference is used in series with the two kettles to achieve heat exchange, reduce the volume of cooling water and solution, shorten the heating and reaction time, and recover waste heat through the circulation system.
It effectively reduces the heating time and electricity consumption required for dissolution, reduces the cooling time and the generation of industrial wastewater, reduces pollution to the natural environment, and achieves green production.
Smart Images
Figure CN222427816U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field, and in particular relates to a dissolving kettle for recovering waste heat. Background Art
[0002] In recent years, with the continuous deepening of new material research, ZrO2 ceramics have been widely used in many fields due to its unique properties, such as high thermal expansion coefficient, low thermal conductivity, high ionic conductivity, good oxidation resistance and thermal stability. ZrO2 has stable chemical properties. In addition to being reactive to a few acids such as H2SO4, HF and H3PO4, it exhibits sufficient stability to other acid and alkali solutions, and also exhibits good stability to sulfides and phosphides. In addition, ZrO2 also has excellent physical properties such as wear resistance, corrosion resistance, high temperature resistance, high strength, high hardness, good thermal shock resistance, high refractive index and good thermal stability.
[0003] In the preparation process of ZrO2 powder, coprecipitation is the most widely used method in industrial production. This method is to mix and dissolve the salts of two metal salt solutions in a solvent, and add a precipitant to the mixed solution to obtain a mixed precipitate with high purity and uniform composition. The coprecipitation method occupies an important position in the production of zirconium oxide powder due to its advantages such as simple process, low cost, low reaction temperature, high sample purity, uniform particles and short synthesis cycle.
[0004] However, the coprecipitation method also faces a series of problems in the production process. In particular, when preparing metal salt solutions, a large amount of industrial wastewater for cooling will be generated. If these wastewaters are not effectively treated, they will directly pollute the environment. At the same time, a large amount of heat energy will be generated during the preparation process. If these heat energies are not effectively utilized, it will lead to a huge waste of energy. In addition, the heat energy in wastewater is also a potential renewable energy source, but this point is often ignored in traditional production processes, resulting in further loss of energy. Utility Model Content
[0005] In order to overcome the deficiencies of the prior art, the utility model provides a dissolving kettle with waste heat recovery, which realizes the effective recovery and utilization of waste heat generated in the production process, so as to reduce environmental pollution, reduce energy consumption, and improve production efficiency.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a dissolving kettle for waste heat recovery, characterized in that: it comprises a first dissolving kettle, the first dissolving kettle is connected with a first liquid outlet pipe and a first liquid inlet pipe, and a first condensing coil is arranged therein, the first liquid outlet pipe, the first liquid inlet pipe and the first condensing coil are installed with a stop valve for controlling the passage of the pipeline, a first liquid discharge pipe is arranged at the bottom of the first dissolving kettle, and a first liquid discharge valve is arranged on the first liquid discharge pipe; a second dissolving kettle, the second liquid outlet pipe and the second liquid inlet pipe are connected to the second dissolving kettle, and a second condensing coil is arranged therein, the second liquid outlet pipe, the second liquid inlet pipe and the second condensing coil are installed with a stop valve for controlling the passage of the pipeline, a second liquid discharge pipe is arranged at the bottom of the second dissolving kettle, and a second liquid discharge valve is arranged on the second liquid discharge pipe; a monitoring and regulating system is used to monitor and regulate the states in the first dissolving kettle and the second dissolving kettle; A circulation system is used to circulate the solutions in the first dissolving kettle and the second dissolving kettle, wherein the first liquid outlet pipe, the first liquid inlet pipe, the second liquid outlet pipe and one end of the second liquid inlet pipe are all connected to the circulation system, and the liquid inlet end and the liquid outlet end of the first condensing coil and the second condensing coil are all connected to the circulation system; when the stop valves on the first liquid outlet pipe, the first liquid inlet pipe and the second condensing coil are opened, the first liquid outlet pipe, the first liquid inlet pipe and the second condensing coil form a first circulation path through the circulation system, and the first circulation path can flow the solution in the first dissolving kettle into the second dissolving kettle; when the stop valves on the second liquid outlet pipe, the second liquid inlet pipe and the first condensing coil are opened, the second liquid outlet pipe, the second liquid inlet pipe and the first condensing coil form a second circulation path through the circulation system, and the second circulation path can flow the solution in the second dissolving kettle into the first dissolving kettle.
[0007] Preferably, the monitoring and adjustment system includes a control box, a pressure monitoring sensor and a temperature monitoring sensor. A group of pressure monitoring sensors and temperature monitoring sensors are respectively provided in the first dissolving kettle and the second dissolving kettle. The pressure monitoring sensors and temperature monitoring sensors are connected to the control box signals.
[0008] Preferably, the monitoring and regulating system further comprises heating tubes, and a group of heating tubes is respectively provided in the first dissolving kettle and the second dissolving kettle, and the heating tubes are connected to the control box signal.
[0009] Preferably, the circulation system comprises a self-priming centrifugal pump and a motor driving the self-priming centrifugal pump.
[0010] Preferably, the first liquid discharge pipe and the second liquid discharge pipe are connected in parallel via a parallel pipe, and a third liquid discharge valve is provided on the parallel pipe.
[0011] Preferably, the first drain valve, the second drain valve and the third drain valve are solenoid valves, and the first drain valve, the second drain valve and the third drain valve are connected to the control box signal.
[0012] Preferably, the stop valve is a solenoid valve, and the solenoid valve is connected to the control box signal.
[0013] In summary, the utility model has the following technical effects: by connecting two kettles in series, the temperature difference of the liquids in the two kettles is cleverly utilized to achieve the purpose of mutual cooling, reducing the cooling water, while reducing the volume of the solution, reducing the heating time and subsequent reaction time, and effectively reducing the heating time required for dissolution, power consumption, cooling time and the generation of industrial wastewater. Reduce the pollution caused to the natural environment to achieve the purpose of green production. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0015] like Figure 1 As shown, a dissolving kettle for waste heat recovery includes a first dissolving kettle 1, a second dissolving kettle 2, a circulation system and a monitoring and regulating system, wherein the monitoring and regulating system includes a control box 3, a pressure monitoring sensor 4, a temperature monitoring sensor 5 and a heating pipe 6. A group of pressure monitoring sensors 4, temperature monitoring sensors 5 and heating pipes 6 are respectively provided in the first dissolving kettle 1 and the second dissolving kettle 2. The pressure monitoring sensor 4, the temperature monitoring sensor 5 and the heating pipe 6 are all prior arts, and all three are connected to the control box 3 by signal. The control box 3 contains a PLC system, and the heating pipes 6 are evenly distributed in the first dissolving kettle 1 and the second dissolving kettle 2; the circulation system is a self-priming centrifugal pump and a three-phase asynchronous motor, and the output end of the three-phase asynchronous motor is transmission-connected to the rotating shaft of the self-priming centrifugal pump to drive the self-priming centrifugal pump to rotate, and the self-priming centrifugal pump is connected to the control box 3 by signal.
[0016] Furthermore, a stirring device 7 is installed in the first dissolving kettle 1 and the second dissolving kettle 2. The stirring device 7 is a prior art and can be a stirring rod driven by a three-phase asynchronous motor after being driven by a speed changer.
[0017] Specifically, the first dissolving kettle 1 is connected to a first liquid outlet pipe 11 and a first liquid inlet pipe 12, and a first condensing coil 13 is arranged therein, and the first liquid outlet pipe 11, the first liquid inlet pipe 12 and the first condensing coil 13 are installed with a check valve 8, the second dissolving kettle 2 is connected to a second liquid outlet pipe 21 and a second liquid inlet pipe 22, and a second condensing coil 23 is arranged therein, and the second liquid outlet pipe 21, the second liquid inlet pipe 22 and the second condensing coil 23 are installed with a check valve 8, and one end of the first liquid outlet pipe 11, the first liquid inlet pipe 12, the second liquid outlet pipe 21 and the second liquid inlet pipe 22 are all connected to the separation On the annular cavity of the centrifugal pump, the liquid inlet and outlet ends of the first condensing coil 13 and the second condensing coil are both connected to the annular cavity of the self-priming centrifugal pump; the first liquid outlet pipe 11, the first liquid inlet pipe 12 and the second condensing coil 23 are opened, and the first liquid outlet pipe 11, the first liquid inlet pipe 12 and the second condensing coil 23 form a first circulation path through the circulation system, and the solution flows from the first dissolving kettle 1 to the second dissolving kettle 2 through the first circulation path under the drive of the self-priming centrifugal pump, and then returns to the first dissolving kettle 1; the heat exchange between the first dissolving kettle 1 and the second dissolving kettle 2 is realized. When the second liquid outlet pipe 21, the second liquid inlet pipe 22 and the first condensing coil 13 are opened, the second liquid outlet pipe 21, the second liquid inlet pipe 22 and the first condensing coil 13 form a second circulation path through the circulation system, and the solution flows from the second dissolving kettle 2 to the first dissolving kettle 1 through the second circulation path under the drive of the self-priming centrifugal pump, and then returns to the second dissolving kettle 2; the heat exchange between the first dissolving kettle 1 and the second dissolving kettle 2 is realized.
[0018] Furthermore, a first drain pipe 91 is provided at the bottom of the first dissolving kettle 1, and a first drain valve 92 is provided on the first drain pipe 91; a second drain pipe 93 is provided at the bottom of the second dissolving kettle 2, and a second drain valve 94 is provided on the second drain pipe 93; the first drain pipe 91 and the second drain pipe 93 are connected in parallel through a parallel pipe 95, and a third drain valve 96 is provided on the parallel pipe 95.
[0019] Furthermore, the stop valve 8 , the first drain valve 92 , the second drain valve 94 and the third drain valve 96 are solenoid valves, and the stop valve 8 , the first drain valve 92 , the second drain valve 94 and the third drain valve 96 are all connected to the control box 3 by signal.
[0020] The specific implementation process of the utility model is as follows: close the first drain valve 92 and the second drain valve 94, add bottom water to the first dissolving kettle 1, start the PLC system in the control box 3, the heating tube 6 in the first dissolving kettle 1 works, and after heating to a suitable temperature, add zirconium oxychloride and other auxiliary materials, and the stirring device 7 works. When the system detects that the temperature in the dissolving kettle reaches the preset temperature, observe the dissolution of the liquid, and if there is no abnormality, the PLC system works normally. The first dissolving kettle 1 stops heating, and bottom water is added to the second dissolving kettle 2. The second liquid outlet pipe 21, the second liquid inlet pipe 22 and the stop valve 8 on the first condensing coil 13 are opened, the first circulation passage is opened, and the self-priming centrifugal pump works. Driven by the self-priming centrifugal pump, the solution flows from the second dissolving kettle 2 to the first dissolving kettle 1 through the second circulation passage and then returns to the second dissolving kettle 2. The first dissolving kettle 1 and the second dissolving kettle 2 realize heat exchange. When the temperature difference between the first dissolving kettle 1 and the second dissolving kettle 2 is less than 5 degrees, the self-priming centrifugal pump stops working, and the stop valve of the first circulation passage is closed. Valves 8 are all closed. At this time, if the temperature in the second dissolving kettle 2 does not reach the set temperature, the heating tube 6 in the second dissolving kettle 2 is started to work until it is heated to the set temperature and then stops working; a system prompt buzzer sounds, zirconium oxychloride and other auxiliary materials are added to the second dissolving kettle 2, and the stirring device 7 is started. At the same time, the solution in the first dissolving kettle 1 has been cooled to a suitable temperature. At this time, the first drain valve 92 is opened, and the material liquid in the first dissolving kettle 1 is filtered and then pumped into the reactor through the parallel pipe 95. The feeding process of the second dissolving kettle 2 is the same as the filtering process of the first dissolving kettle 1.
Claims
1. A dissolving kettle for waste heat recovery, characterized in that: include A first dissolving kettle (1), the first dissolving kettle (1) being connected to a first liquid outlet pipe (11) and a first liquid inlet pipe (12), and having a first condensing coil (13) therein, the first liquid outlet pipe (11), the first liquid inlet pipe (12) and the first condensing coil (13) being provided with a stop valve (8) for controlling the passage of the pipes, a first liquid discharge pipe (91) being provided at the bottom of the first dissolving kettle (1), and a first liquid discharge valve (92) being provided on the first liquid discharge pipe (91); A second dissolving kettle (2), the second dissolving kettle (2) being connected to a second liquid outlet pipe (21) and a second liquid inlet pipe (22), and being provided with a second condensing coil (23), the second liquid outlet pipe (21), the second liquid inlet pipe (22) and the second condensing coil (23) being provided with a stop valve (8) for controlling the passage of the pipes, a second liquid discharge pipe (93) being provided at the bottom of the second dissolving kettle (2), and a second liquid discharge valve (94) being provided on the second liquid discharge pipe (93); A monitoring and regulating system, used for monitoring and regulating the conditions in the first dissolving tank (1) and the second dissolving tank (2); A circulation system for circulating the solutions in the first dissolving kettle (1) and the second dissolving kettle (2), wherein the first liquid outlet pipe (11), the first liquid inlet pipe (12), the second liquid outlet pipe (21) and one end of the second liquid inlet pipe (22) are all connected to the circulation system, and the liquid inlet end and the liquid outlet end of the first condensing coil (13) and the second condensing pipe are all connected to the circulation system; When the check valves (8) on the first liquid outlet pipe (11), the first liquid inlet pipe (12) and the second condensing coil (23) are opened, the first liquid outlet pipe (11), the first liquid inlet pipe (12) and the second condensing coil (23) form a first circulation path through the circulation system, and the first circulation path can drive the solution in the first dissolving kettle (1) to flow into the second dissolving kettle (2) through the circulation system and then return to the first dissolving kettle (1); When the stop valves (8) on the second liquid outlet pipe (21), the second liquid inlet pipe (22) and the first condensing coil (13) are opened, the second liquid outlet pipe (21), the second liquid inlet pipe (22) and the first condensing coil (13) form a second circulation path through the circulation system. The second circulation path can drive the solution in the second dissolving kettle (2) to flow into the first dissolving kettle (1) through the circulation system and then return to the second dissolving kettle (2).
2. The dissolving kettle for waste heat recovery according to claim 1, characterized in that: The monitoring and regulating system comprises a control box (3), a pressure monitoring sensor (4) and a temperature monitoring sensor (5); a group of pressure monitoring sensors (4) and temperature monitoring sensors (5) are respectively arranged in the first dissolving kettle (1) and the second dissolving kettle (2); the pressure monitoring sensors (4) and the temperature monitoring sensors (5) are connected to the control box (3) by signals.
3. The dissolving kettle for waste heat recovery according to claim 2, characterized in that: The monitoring and regulating system further comprises heating tubes (6). A group of heating tubes (6) is respectively arranged in the first dissolving kettle (1) and the second dissolving kettle (2). The heating tubes (6) are connected to the control box (3) by signals.
4. The dissolving kettle for waste heat recovery according to claim 1, characterized in that: The circulation system comprises a self-priming centrifugal pump and a motor for driving the self-priming centrifugal pump, and the motor is connected to a control box (3) by signal.
5. The dissolving kettle for waste heat recovery according to claim 1, characterized in that: The first liquid discharge pipe (91) and the second liquid discharge pipe (93) are connected in parallel via a parallel pipe (95), and a third liquid discharge valve (96) is provided on the parallel pipe (95).
6. The dissolving kettle for waste heat recovery according to claim 5, characterized in that: The first liquid discharge valve (92), the second liquid discharge valve (94) and the third liquid discharge valve (96) are solenoid valves, and the first liquid discharge valve (92), the second liquid discharge valve (94) and the third liquid discharge valve (96) are connected to the control box (3) by signal.
7. The dissolving kettle for waste heat recovery according to claim 1, characterized in that: The on-off valve (8) is a solenoid valve, and the solenoid valve is signal-connected to the control box (3).