Sodium sulfide production equipment with waste heat recovery function

Abstract

The utility model discloses sodium sulfide production equipment with a waste heat recovery function, which comprises an integrated shell, and the interior of the shell is divided into a heating area, a reaction area and a waste heat recovery area; the heating area is provided with a spiral heat conduction pipe set and fin-shaped heat conduction pieces, the reaction area is provided with a porous partition plate layered reaction cavity, the waste heat recovery area is provided with a multi-stage heat exchange module and a flow divider valve, and a phase change heat storage device is integrated at the bottom of the equipment. The heat energy utilization efficiency can be remarkably improved, graded recovery of heat energy of different temperature sections is achieved, meanwhile, the requirements of small and medium-sized production enterprises are met through compact design, and high economical efficiency and practicability are achieved.

Description

Technical Field

[0001] This utility model relates to a sodium sulfide production equipment with waste heat recovery function. Background Technology

[0002] In the field of modern chemical production, sodium sulfide production equipment, as an important industrial device, plays a crucial role in the sustainable development of enterprises due to its high efficiency and environmental friendliness. With the increasing demand for energy conservation and emission reduction, sodium sulfide production equipment with waste heat recovery capabilities has gradually become a research hotspot. However, existing sodium sulfide production equipment still has many shortcomings in practical applications, particularly in terms of waste heat recovery efficiency, system integration, and equipment applicability, making it difficult to fully meet the demands of modern chemical production for efficient, environmentally friendly, and intelligent equipment.

[0003] Chinese invention patent CN114408869B discloses a "Sodium Sulfide Production System and Process for Gas-Phase Fluidized Reduction of Sodium Sulfate." This system achieves tiered energy utilization through staged heating and waste heat recovery, offering advantages in energy consumption control and environmental emissions. However, this equipment is primarily designed for large-scale continuous industrial production, resulting in a complex structure and high investment costs, limiting its promotion and application in small and medium-sized production enterprises. Furthermore, the waste heat recovery section lacks a refined, staged recovery design for heat at different temperature ranges, leading to the ineffective utilization of some low-grade heat energy, and the overall waste heat recovery efficiency still has room for improvement. In addition, the system does not involve specific structural optimization at the equipment level, making it difficult to meet the actual needs of small and medium-sized production enterprises for compact and highly adaptable waste heat recovery devices.

[0004] In summary, while existing sodium sulfide production equipment has some foundation in waste heat recovery, it generally suffers from low recovery efficiency, complex structure, and poor adaptability. Therefore, there is an urgent need to develop a new type of sodium sulfide production equipment with waste heat recovery capabilities to improve waste heat utilization, simplify system structure, and enhance equipment applicability, thereby better meeting the actual needs of enterprises of different sizes for energy-saving and environmentally friendly production equipment. Utility Model Content

[0005] The purpose of this invention is to provide a sodium sulfide production equipment with waste heat recovery function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sodium sulfide production equipment with waste heat recovery function, comprising an integrated shell, wherein a heating zone, a reaction zone and a waste heat recovery zone are provided inside the shell, a spiral heat-conducting pipe assembly and finned heat-conducting fins are provided in the heating zone, a layered reaction chamber and a porous baffle are provided in the reaction zone, and a multi-stage heat exchange module and a diversion valve are provided in the waste heat recovery zone.

[0007] Preferably, the outer wall of the spiral heat pipe assembly has finned heat-conducting fins evenly distributed, and the finned heat-conducting fins are made of a material with high thermal conductivity.

[0008] Preferably, a porous partition is installed inside the layered reaction chamber, with micropores evenly distributed on the porous partition, the diameter of which ranges from 0.5 mm to 2 mm.

[0009] Preferably, the multi-stage heat exchange module consists of multiple heat exchange units connected in series, each heat exchange unit has a corrugated guide plate inside, and a temperature control sensor is installed at the outlet end of the heat exchange unit.

[0010] Preferably, the bottom of the equipment integrates a compact thermal storage device, which is filled with phase change thermal storage material and wrapped with a vacuum insulation panel structure on the outside.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: First, by optimizing the functional division and structure of the heating zone, reaction zone, and waste heat recovery zone, the thermal energy utilization efficiency of the equipment is significantly improved; second, the design of the multi-stage heat exchange module enables the refined recovery of thermal energy at different temperature ranges, avoiding the waste of low-grade thermal energy; third, the application of the compact thermal storage device not only enhances the thermal energy regulation capability of the equipment but also significantly reduces the energy consumption level of the system; finally, the overall structure of the equipment is compact and occupies a small area, making it particularly suitable for use by small and medium-sized production enterprises, and it has high economic efficiency and practicality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a magnified view of a portion of the heating zone;

[0014] Figure 3 This is a schematic diagram of the layered reaction chamber structure in the reaction zone;

[0015] Figure 4 A structural diagram of a multi-stage heat exchange module in the waste heat recovery zone;

[0016] Figure 5 This is a cross-sectional view of a compact thermal storage device;

[0017] Figure 6 This is a flowchart illustrating the working principle of this utility model.

[0018] The attached figures are labeled as follows:

[0019] 1. Integrated shell; 2. Heating zone; 3. Reaction zone; 4. Waste heat recovery zone; 5. Spiral heat pipe assembly; 6. Finned heat conduction plate; 7. Layered reaction chamber; 8. Porous partition; 9. Micropores; 10. Multi-stage heat exchange module; 11. Heat exchange unit; 12. Corrugated baffle; 13. Temperature control sensor; 15. Compact thermal storage device; 16. Phase change thermal storage material; 17. Vacuum insulation panel structure. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides a sodium sulfide production equipment with waste heat recovery function, the specific implementation of which is combined with Figures 1 to 6 A detailed description is provided. The overall structure of the equipment is as follows: Figure 1 As shown, it includes an integrated housing 1, the interior of which is divided into three functional areas: a heating zone 2, a reaction zone 3, and a waste heat recovery zone 4. The design of each area has been optimized to achieve efficient thermal energy utilization and a compact structural layout, meeting the needs of small and medium-sized manufacturing enterprises.

[0022] The specific structure of heating zone 2 is as follows: Figure 2 As shown, its central component is a spiral heat pipe assembly 5, which is arranged axially along the shell and runs through the entire heating zone. Finned heat-conducting fins 6 are evenly distributed on the outer wall of the heat pipe assembly. These fins are made of materials with high thermal conductivity, such as aluminum alloy or copper alloy, which significantly improves heat transfer efficiency. During actual operation, the external heat source transfers heat to the finned heat-conducting fins through the heat pipe assembly, and then the fins evenly distribute the heat within the heating zone. This design not only ensures rapid heat transfer but also avoids localized overheating. Furthermore, the spiral heat pipe assembly design creates a vortex effect in the airflow within the heating zone, further enhancing the heat exchange effect.

[0023] The structure of reaction zone 3 is as follows Figure 3As shown, its core component is a layered reaction chamber 7, within which a porous baffle 8 is installed. Micropores 9 are evenly distributed on the porous baffle, with diameters ranging from 0.5 mm to 2 mm, the specific size adjusted according to the particle size of the material. The micropore design promotes sufficient contact between the airflow and the reactants, while reducing uneven heat transfer caused by material accumulation. In practical applications, the reactants enter from the top of the layered reaction chamber and, under gravity, pass through the porous baffle layer by layer, reacting chemically with the heat transferred from the heating zone to produce sodium sulfide. Due to the presence of the porous baffle, the residence time of the material in the reaction chamber is extended, thereby improving reaction efficiency and product purity.

[0024] The structure of waste heat recovery zone 4 is as follows: Figure 4 As shown, its core component is a multi-stage heat exchange module 10. This module consists of multiple heat exchange units 11 connected in series, each with a corrugated guide vane 12 inside. The corrugated guide vane design increases the heat exchange area and guides the airflow to form turbulence, thereby significantly improving heat exchange efficiency. A temperature control sensor 13 is installed at the outlet of the heat exchange unit to monitor the temperature of the recovered heat energy in real time. The temperature control sensor feeds the monitoring data back to the control system, which automatically adjusts the opening of the diversion valve based on the feedback data to achieve graded recovery and reuse of heat energy at different temperature ranges. For example, the high-temperature heat energy can be used to preheat the reaction materials, while the low-temperature heat energy can be used for equipment insulation or other auxiliary purposes. In this way, the waste heat recovery zone achieves refined management of heat energy, avoiding the waste of low-grade heat energy.

[0025] The bottom of the device integrates a compact thermal storage unit 15, the cross-sectional structure of which is as follows: Figure 5 As shown, the thermal storage device is filled with a phase change thermal storage material 16, such as a mixture of paraffin or salts, which can store heat when there is sufficient high-temperature waste heat and release heat during system operation, thus balancing the supply and demand of thermal energy. The thermal storage device is externally wrapped with a vacuum insulation panel structure 17, which effectively reduces heat loss and further improves the overall energy-saving effect. In actual operation, when the waste heat generated by the system exceeds the current demand, the excess heat is stored in the phase change thermal storage material; when the system's heat energy supply is insufficient, the thermal storage device releases the stored heat to maintain the stable operation of the system.

[0026] The working principle and process of this utility model are as follows: Figure 6As shown, the flow path and recovery process of heat energy between the functional areas are as follows: First, the external heat source transfers heat to the reaction zone 3 through the spiral heat pipe assembly 5 and finned heat-conducting fins 6 in the heating zone 2. In the reaction zone 3, the reactants react chemically with the heat to generate sodium sulfide, while some of the heat enters the waste heat recovery zone 4 with the airflow. In the waste heat recovery zone 4, the multi-stage heat exchange module 10 performs graded recovery of the waste heat in the airflow. The high-temperature section of heat energy is used to preheat the reactants, and the low-temperature section of heat energy is used for equipment insulation. The waste heat that is not fully recovered is finally stored in the compact heat storage device 15 for subsequent use.

[0027] In practical applications, this invention is suitable for small and medium-sized sodium sulfide production enterprises. For example, in the actual production process of a chemical plant, the equipment processes approximately 5 tons of sulfur-containing raw materials daily. Through the aforementioned structural design and operating principle, the thermal energy utilization rate is increased by more than 30% compared to traditional equipment, while the equipment's footprint is reduced by 40%, significantly lowering production costs and space requirements. Furthermore, due to the equipment's automated heat recovery and regulation functions, operators only need to periodically check the working status of the temperature control sensor and the diversion valve, greatly simplifying the operation process.

[0028] In summary, this invention achieves the goals of efficient thermal energy utilization and simplified system structure by optimizing the functional division and structural design of the heating zone, reaction zone, and waste heat recovery zone, combined with the application of a compact thermal storage device. Its specific implementation fully demonstrates the technological innovation and practicality of the equipment, providing an economical and efficient solution for small and medium-sized sodium sulfide production enterprises.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sodium sulfide production equipment with waste heat recovery function, characterized in that, It includes an integrated shell (1), inside which are a heating zone (2), a reaction zone (3) and a waste heat recovery zone (4). The heating zone (2) is equipped with a spiral heat-conducting pipe assembly (5) and finned heat-conducting plates (6). The reaction zone (3) is equipped with a layered reaction chamber (7) and a porous partition (8). The waste heat recovery zone (4) is equipped with a multi-stage heat exchange module (10) and a diversion valve.

2. The sodium sulfide production equipment with waste heat recovery function according to claim 1, characterized in that, The outer wall of the spiral heat pipe assembly (5) is uniformly distributed with finned heat-conducting plates (6).

3. The sodium sulfide production equipment with waste heat recovery function according to claim 1, characterized in that, A porous partition (8) is installed inside the layered reaction chamber (7). Micropores (9) are evenly distributed on the porous partition (8). The diameter of the micropores (9) ranges from 0.5 mm to 2 mm.

4. The sodium sulfide production equipment with waste heat recovery function according to claim 1, characterized in that, The multi-stage heat exchange module (10) consists of multiple heat exchange units (11) connected in series. Each heat exchange unit (11) has a corrugated guide plate (12) inside and a temperature control sensor (13) is installed at the outlet end of the heat exchange unit (11).

5. A sodium sulfide production equipment with waste heat recovery function according to claim 1, characterized in that, The bottom of the equipment integrates a compact heat storage device (15), which is filled with phase change heat storage material (16) and wrapped with a vacuum insulation panel structure (17).

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