Multi-tube-pass multi-medium preheating system
By using a multi-pipe and multi-media preheating system in the slurry preheating system, multiple medium preheating systems and pressurized oxidation heat exchange system are serially connected, the problems of low heating efficiency and blockage in the existing technology are solved, and the problem of realization is realized Highly efficient and low-energy slurry preheating.
Patent Information
- Application Number
- CN202420835115.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-04-22
AI Technical Summary
The prior art has low heating efficiency during the preheating of the ore slurry, which is prone to failure, resulting in excessive energy consumption and waste of resources. The excessive concentration of the ore slurry is likely to block the heat exchange pipeline, increasing maintenance costs.
A multi-tube-trip and multi-media preheating system is adopted, and multiple medium preheating systems and pressurized oxidation and heat exchange systems are connected in serial, and heat exchange is used for different media and steam to achieve multi-media multi-tube-trip slurry preheating.
It improves the efficiency of slurry heating, reduces the occurrence of faults, reduces the energy consumption and costs of enterprises, and solves the blockage problem through high-pressure clean water flushing, avoiding shutdown and maintenance.
Smart Images
Figure CN222468969U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of slurry preheating processing, in particular to a multi-tube-pass multi-medium preheating system. Background Art
[0002] The existing technical solutions use a single steam heat exchanger, or a single thermal oil machine for heating. This method has low heating efficiency and is prone to failure, resulting in excessive energy consumption, waste of resources, and increased processing costs for the enterprise. Secondly, when preheating the slurry, the slurry concentration is too high, which can easily clog the heat exchange pipe. This patent uses more than one medium preheating system and more than one pressurized oxidation heat exchange system in parallel to achieve multi-media and multi-pass slurry preheating, which can reduce the energy consumption of the enterprise and save the enterprise cost. After clogging, it can be flushed with high-pressure clean water according to the pressure difference and time to avoid downtime for maintenance and delay in production. Utility Model Content
[0003] The utility model provides a multi-tube-pass multi-medium preheating system, which can heat the ore pulp in multiple ways in parallel, realize multi-medium multi-tube-pass ore pulp preheating, improve heating efficiency, reduce malfunctions, thereby reducing enterprise energy consumption and saving enterprise costs.
[0004] The technical solution adopted by the utility model is as follows: a multi-pass multi-medium preheating system, comprising more than one medium preheating system and more than one pressurized oxidation heat exchange system connected in series; the medium preheating system comprises a first preheater, a medium heater, and a medium conduit, the inlet of the medium heater is connected to the outlet of the first preheater through the medium conduit, and the outlet of the medium heater is connected to the inlet of the first preheater through the medium conduit; the pressurized oxidation heat exchange system comprises a high-pressure reactor, a flash tank, a second preheater, a steam conduit, and a condensate tank, the high-pressure reactor is connected to the inlet of the flash tank, the outlet of the flash tank is connected to the inlet of the second preheater through the steam conduit, and the outlet of the second preheater is connected to the condensate tank; the first preheater and the second preheater are provided with flow pipes, the flow pipes contain slurry to be preheated, the first preheater and the second preheater are provided with a partition at the boundary of the first preheater and the second preheater, the medium flows in the medium conduit, and the steam flows in the steam conduit.
[0005] Furthermore, the inlet of the circulation pipe is connected to a high-pressure water pump.
[0006] Furthermore, it also includes a PLC controller and a differential pressure sensor connected to the PLC controller, wherein the differential pressure sensor is installed at the inlet and outlet of the flow pipe in the preheater corresponding to each preheating system.
[0007] The beneficial effects of the utility model are as follows: by connecting more than one medium preheating system and more than one pressurized oxidation heat exchange system in series, the medium preheating system heats the medium in the medium conduit, and then the heated medium flows into the first heater and then flows out of the first heater, thereby heating the slurry in the circulation pipe. The pressurized oxidation heat exchange system heats the steam, and then the heated steam flows into the second heater through the steam conduit and then flows out of the second heater, thereby heating the slurry in the circulation pipe. With this structure, more than one medium preheating system and more than one pressurized oxidation heat exchange system can be used in parallel at the same time to achieve multi-media multi-tube slurry preheating, improve heating efficiency, reduce failures, reduce enterprise energy consumption, and save enterprise costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 A schematic diagram of a multi-pass multi-medium preheating system framework is used to illustrate an embodiment of the utility model.
[0009] Markings in the figure: 1-first preheater 2-partition 3-second preheater 4-medium heater 5-high-pressure water pump 6-medium conduit 7-high-pressure reactor 8-flash tank 9-steam conduit 10-circulation pipe 11-condensation water tank 12-slurry discharge chamber. DETAILED DESCRIPTION
[0010] The present invention is further described in detail below in conjunction with specific implementation methods, but does not limit the protection scope and application scope of the present invention:
[0011] like Figure 1As shown, the technical solution adopted by the utility model is as follows: a multi-pass multi-medium preheating system, including more than one medium preheating system and more than one pressurized oxidation heat exchange system connected in series; the medium preheating system includes a first preheater 1, a medium heater 4, and a medium conduit 6, the inlet of the medium heater 4 is connected to the outlet of the first preheater 1 through the medium conduit 6, and the outlet of the medium heater 4 is connected to the inlet of the first preheater 1 through the medium conduit 6, and the medium can be heat transfer oil, water, etc.; the pressurized oxidation heat exchange system includes a high-pressure reactor 7, a flash tank 8, second preheater 3, steam conduit 9, condensate tank 11, high pressure reactor 7 is connected to the inlet of flash tank 8, the outlet of flash tank 8 is connected to the inlet of second preheater 3 through steam conduit 9, and the outlet of second preheater 3 is connected to condensate tank 11; circulation pipe 10 is arranged in first preheater 1 and second preheater 3, and slurry to be preheated is arranged in circulation pipe 10, and partition 2 is arranged at the critical point of first preheater 1 and second preheater 3, which is used to separate first preheater 1 and second preheater 3, medium is circulated in medium conduit 6, and steam is flowed in steam conduit 9. Preferably, the inlet of circulation pipe 10 is connected to high pressure water pump 5, which can flush the blocked slurry in circulation pipe 10. Further, the multi-pass multi-medium preheating system also includes PLC controller and differential pressure sensor connected to PLC controller, and the differential pressure sensor is installed at the inlet and outlet of circulation pipe 10 in the preheater corresponding to each preheating system. When the pressure difference increases, the circulation pipe 10 is blocked at this time. At this time, the high-pressure water pump 5 starts to flush the circulation pipe. When the differential pressure drops to a certain value, the flushing is stopped. There is no need to disassemble the machine for maintenance, thereby improving the production efficiency per unit area.
[0012] Working principle of medium preheating system: the medium is heated by the medium heater 4. After heating, the medium flows into the first preheater 1 through the medium conduit 6. At this time, the first preheater 1 heats the slurry in the flow pipe 10 inside it. Then the medium flows out from the outlet of the first preheater 1 and flows into the medium heater 4 through the medium conduit for heating, forming a medium heating cycle. After being preheated by the first preheater 1, the slurry flows into the second preheater 3.
[0013] Working principle of pressurized oxidation heat exchange system: The heat source is provided by the high-pressure reactor 7, the flash tank 8 provides steam, and it is pressed into the second preheater 3 through the steam conduit 9. At this time, the second preheater 3 heats the slurry in the internal flow pipe 10, and then the steam flows out from the outlet of the second preheater 3, and the steam returns to the condensation water tank 11. The slurry is preheated by the second preheater 3 and then flows out.
[0014] The working principle of the multi-pass multi-medium preheating system: more than one medium preheating system and more than one pressurized oxidation heat exchange system are connected in series, and each separate section is a circulating heat exchange of different media, and the circulation pipes 10 of the multi-section preheating system and the heat exchange system are connected internally, so that the raw materials to be preheated flow through the preheating system and the heat exchange system in sequence. The slurry is preheated by the preheater corresponding to the medium preheating system, and then flows out after heat exchange in the corresponding preheater of the pressurized oxidation heat exchange system and enters the slurry chamber 12. In this way, different heat sources can be used in parallel to achieve the effect of reducing energy consumption and multi-stage preheating, and reduce carbon emissions.
[0015] The above content is a further detailed description of the utility model in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, making several equivalent substitutions or obvious modifications without departing from the concept of the utility model, and having the same performance or use, should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.
Claims
1. A multi-pass multi-medium preheating system, characterized in that: It includes one or more medium preheating systems and one or more pressurized oxidation heat exchange systems connected in series; The medium preheating system comprises a first preheater (1), a medium heater (4), and a medium conduit (6); the inlet of the medium heater (4) is connected to the outlet of the first preheater (1) via the medium conduit (6); and the outlet of the medium heater (4) is connected to the inlet of the first preheater (1) via the medium conduit (6); The pressurized oxidation heat exchange system comprises a high-pressure reactor (7), a flash tank (8), a second preheater (3), a steam conduit (9), and a condensate tank (11), wherein the high-pressure reactor (7) is connected to the inlet of the flash tank (8), the outlet of the flash tank (8) is connected to the inlet of the second preheater (3) via the steam conduit (9), and the outlet of the second preheater (3) is connected to the condensate tank (11); A circulation pipe (10) is provided in the first preheater (1) and the second preheater (3), and slurry to be preheated is contained in the circulation pipe (10). A partition (2) is provided at a boundary between the first preheater (1) and the second preheater (3), a medium flows in the medium conduit (6), and steam flows in the steam conduit (9).
2. A multi-pass multi-medium preheating system according to claim 1, characterized in that: The inlet of the circulation pipe (10) is connected to a high-pressure water pump (5).
3. A multi-pass multi-medium preheating system according to claim 1 or 2, characterized in that: It also includes a PLC controller and a differential pressure sensor connected to the PLC controller, wherein the differential pressure sensor is installed at the inlet and outlet of the flow pipe (10) in the preheater corresponding to each preheating system.