Dividing wall type phosphate ore mixture heating device

Abstract

The utility model relates to the technical field of yellow phosphorus production equipment, in particular to a dividing wall type phosphate ore mixture heating device, which comprises a furnace body, a feed port arranged at the top of the furnace body, a hot air jacket arranged on the inner wall of the furnace body, a discharge pipe arranged at the bottom of the furnace body, and a hot air pipe arranged in the furnace body. The bottom of the hot air pipe is communicated with the hot air jacket, the top of the hot air pipe is communicated with a hot air pipe annular communicating pipe, the hot air pipe annular communicating pipe is communicated with the outside through an air outlet pipe, the bottom of the hot air jacket is communicated with a hot air inlet pipe through a hot air pressure equalizing box, and a gate valve is arranged on a discharging pipe. According to the device, high-temperature hot flue gas generated by combustion of yellow phosphorus tail gas generated by yellow phosphorus production through an electric furnace method is used for preheating a phosphate ore mixture to 300-350 DEG C in the device, and then the phosphate ore mixture is added into the electric furnace through the blanking pipe, so that the energy required by yellow phosphorus smelting is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of yellow phosphorus production equipment, in particular to a partition-type phosphate ore mixture heating device. Background Art

[0002] Yellow phosphorus is an important basic industrial raw material, mainly used for the preparation of phosphoric acid, phosphides, phosphates, etc. It is widely used in fertilizers, pesticides, feed industry, food processing industry, medicine, electronics industry and many other fields.

[0003] At present, the main method for industrial production of yellow phosphorus is the electric furnace method, that is, phosphate ore, silica, and coke are placed in an electric furnace according to a certain proportion and particle size, and a reduction reaction occurs at a high temperature of 1400℃. The phosphorus vapor and furnace dust are cooled and washed to obtain yellow phosphorus products. The electric furnace method consumes a lot of electricity during the production process. It takes about 15,000 kWh of electricity to produce one ton of yellow phosphorus, and the electricity cost accounts for more than 50% of the total yellow phosphorus production cost.

[0004] Yellow phosphorus tail gas is a by-product of yellow phosphorus production. Its main component is CO (content 92%), and its calorific value is about 10MJ / m 3 , is a high-quality gas fuel. In the existing yellow phosphorus production process, the initially purified yellow phosphorus tail gas is mainly used as a heat source for drying and phosphorus evaporation in yellow phosphorus production, and only about 30% of the generated amount can be utilized. For yellow phosphorus manufacturers that do not have the ability to deeply purify and utilize yellow phosphorus tail gas, the yellow phosphorus tail gas is almost always burned and discharged, wasting resources.

[0005] In yellow phosphorus production, when the moisture content in the charge increases by one percentage point based on 1%, the electric furnace power consumption increases by 90-120KWh / t. Therefore, all yellow phosphorus manufacturers now need to dry the main raw materials, phosphate rock and coke (moisture content 10-15%), to a moisture content of 3-5%. However, after using yellow phosphorus tail gas as a heat source to raise the temperature of the raw materials to above 400°C, they must be cooled and piled in the silo for standby use, which causes heat waste when the moisture is dried. In yellow phosphorus smelting production, for every 1°C increase in the temperature of the phosphate rock mixture entering the furnace, 2.5-3KWh of electricity can be saved in producing 1 ton of yellow phosphorus.

[0006] Therefore, a phosphate rock mixture heating device with reasonable structural design, easy implementation and continuous heating operation is objectively needed, which can effectively reduce the power consumption of yellow phosphorus smelting, reduce the production cost of yellow phosphorus, and improve the utilization rate of yellow phosphorus tail gas. Utility Model Content

[0007] The utility model aims to provide a partition-type phosphate rock mixture heating device, which burns yellow phosphorus tail gas into hot air, heats the phosphate ore through the partition-type phosphate rock mixture heating device, and then indirectly introduces the phosphate ore mixture into the furnace to realize the reuse of the tail gas from the phosphorus furnace.

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a partition-type phosphate ore mixture heating device, including a furnace body, a feed port is provided at the top of the furnace body, a hot air jacket is provided on the inner wall of the furnace body, a discharge pipe is provided at the bottom of the furnace body, a hot air pipe is provided in the furnace body, the bottom of the hot air pipe is connected with the hot air jacket, and the top is connected with the hot air pipe annular connecting pipe, the hot air pipe annular connecting pipe is connected with the outside through the outlet pipe, the bottom of the hot air jacket is connected with the hot air inlet pipe through the hot air equalizing pressure box, and the discharge pipe is provided with a plug valve.

[0009] Furthermore: a heat-insulating layer is arranged on the outer wall of the furnace body.

[0010] Furthermore: a hot air pipe fixing frame is also provided inside the furnace body.

[0011] Further: an inspection hole is provided at the lower part of the furnace body.

[0012] Further: an observation hole at the bottom of the furnace body.

[0013] Further: a thermocouple 1 is provided in the middle of the furnace body.

[0014] Furthermore: a thermocouple II is provided on the hot air inlet pipe.

[0015] Furthermore: the outer wall of the furnace body is also provided with mounting ears.

[0016] Further: the hot air equalizing pressure box is arranged in a ring shape outside the hot air jacket at the lower part of the furnace body.

[0017] In the utility model, the furnace body, the hot air equalizing box and the hot air pipe are made of one material or a combination of materials such as Q235, Q345 and 310s, and are designed in an integrated manner.

[0018] The beneficial technical effects of the utility model are:

[0019] 1. The utility model adopts an integrated design, and utilizes the gravity of the heated material to fall and accumulate to form a stable material layer, and the discharge amount supplements the feed amount, realizing the integration of feeding, heating, and unloading. The phosphate ore mixture is continuously added into the furnace body from the feed port on the top of the furnace body, and falls into the conical discharge pipe through the gap of the hot air pipe. After the phosphate ore mixture is naturally accumulated and fills the warehouse, the high-temperature hot air is pressurized by the fan and enters the annular hot air equalizing box from the hot air inlet pipe at the bottom of the furnace body, and then is evenly heated by the furnace body hot air jacket and multiple bundles of vertical hot air pipes and the accumulated heated phosphate ore mixture. The hot air after heat exchange is discharged through the outlet pipe. According to the temperature requirements and discharge amount of the heated material, the temperature and air intake of the hot air are adjusted to control and maintain the dynamic balance of the heating material input and output. The lower part is continuously unloaded, and the upper material slowly moves downward by its own weight.

[0020] 2. The thermocouple data collected by the utility model in the furnace body is fed back to the controller according to the setting requirements to automatically adjust the fan motor speed and the high-temperature hot air volume. The thermocouple data collected by the air inlet pipe is fed back to the controller according to the setting requirements to automatically adjust the high-temperature hot air temperature.

[0021] 3. The utility model provides an inspection hole on the lower side of the furnace body to facilitate regular inspection and maintenance of the hot air pipe; the charging furnace is designed as an integrated unit, with a compact and reasonable structure, safe and reliable, capable of continuous feeding, heating and unloading, and has the advantages of high heating efficiency and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] In the figure, 1-furnace body, 2-feed port, 3-hot air jacket, 4-thermocouple Ι, 5-hot air pipe fixing frame, 6-inspection hole, 7-observation hole, 8-thermocouple Ⅱ, 9-hot air inlet pipe, 10-gate valve, 11-discharge pipe, 12-hot air equalizing pressure box, 13-hot air pipe, 14 insulation layer, 15-air outlet pipe, 17-installation ear.

[0025] Figure 2 yes Figure 1 Middle AA section;

[0026] In the figure, 3 is a hot air jacket, 13 is a hot air pipe, 14 is an insulation layer, 15 is an air outlet pipe, and 16 is a hot air pipe annular connecting pipe.

[0027] Figure 3 yes Figure 1 Middle BB section;

[0028] In the figure, 3-hot air jacket, 8-thermocouple II, 9-hot air inlet pipe, 11-discharge pipe, 12-hot air equalizing pressure box, 13-hot air pipe, 14 insulation layer. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] like Figure 1-3 As shown, a partition-type phosphate rock mixture heating device includes a furnace body 1, the upper part of the furnace body is cylindrical, the lower part is conical, a feed port 2 is provided at the top, a hot air jacket 3 is provided on the inner wall of the furnace body, and a discharge pipe 11 is provided at the bottom of the furnace body; a hot air pipe 13 is provided in the furnace body, the bottom of the hot air pipe is connected to the hot air jacket, and the top is connected to the hot air pipe annular connecting pipe 16, the hot air pipe annular connecting pipe is connected to the outside through the outlet pipe 15, the bottom of the hot air jacket is connected to the hot air inlet pipe 9 through the hot air equalizing box 12, and a gate valve 10 is provided on the discharge pipe. The vertical gap of the hot air pipe 13 is used as a material falling channel, and the hot air pipe and the furnace body are between the material heating chamber. In the embodiment, the material enters the furnace body from the feed port, is heated in the material heating chamber, and is transported into the electric heating furnace through the discharge pipe, so as to achieve the function of heating the raw materials by using the tail gas of the phosphorus furnace.

[0031] In the utility model, a heat-insulating layer 14 is arranged on the outer wall of the furnace body, the purpose of which is to reduce the heat loss of the heating chamber.

[0032] In the present invention, in order to ensure the stability of the hot air pipe in the heating chamber, a hot air pipe fixing frame 5 is further provided inside the furnace body.

[0033] In the utility model, an inspection hole 6 is provided at the lower part of the furnace body to facilitate the internal inspection of the equipment.

[0034] In the utility model, the observation hole 7 at the lower part of the furnace body is convenient for the personnel on duty to check the material status in the furnace.

[0035] In the utility model, a thermocouple 14 is provided in the middle of the furnace body for detecting the temperature in the heating chamber.

[0036] In the utility model, a thermocouple II 8 is provided on the hot air inlet pipe, and its purpose is to detect the real-time temperature of the air inlet pipe.

[0037] In the utility model, a mounting lug 17 is further provided on the outer wall of the furnace body.

[0038] In the utility model, the hot air equalizing pressure box is arranged in a ring shape outside the hot air jacket at the lower part of the furnace body. In this embodiment, the hot air equalizing pressure box is of a ring design, and it is obvious that a square design, for example, can also be adopted.

[0039] The phosphate rock mixture is continuously added into the furnace from the top feed port of the furnace body, and falls into the conical discharge pipe through the gap of the hot air pipe. After the phosphate rock mixture is naturally piled up and filled up, the high-temperature hot air is pressurized by the fan and enters the annular hot air equalizing box from the hot air inlet pipe at the bottom of the furnace body, and then is evenly heated by the furnace body hot air jacket and multiple bundles of vertical hot air pipes and the accumulated heated phosphate rock mixture. The hot air after heat exchange is discharged through the outlet pipe. According to the temperature requirements and discharge amount of the heated material, the temperature and air intake of the hot air are adjusted to control and maintain the dynamic balance of the inflow and outflow of the heated material. The lower part is continuously unloaded, and the upper material slowly moves down by its own weight.

[0040] Thermocouple data collected at the furnace body is fed back to the controller according to the setting requirements to automatically adjust the fan motor speed and the high-temperature hot air volume. Thermocouple data collected at the air inlet pipe is fed back to the controller according to the setting requirements to automatically adjust the high-temperature hot air temperature.

[0041] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as those generally understood by ordinary technicians in the field to which the utility model belongs. It should also be understood that those terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0042] Those skilled in the art can understand that the components in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be changed accordingly and located in one or more devices different from the embodiment. The components in the above embodiment can be combined into one component, or can be further divided into multiple sub-components.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A partition-type phosphate rock mixture heating device, characterized in that: The invention comprises a furnace body (1), wherein a feed port (2) is provided at the top of the furnace body, a hot air jacket (3) is provided on the inner wall of the furnace body, a discharge pipe (11) is provided at the bottom of the furnace body, a hot air pipe (13) is provided in the furnace body, the bottom of the hot air pipe is connected to the hot air jacket, and the top is connected to a hot air pipe annular connecting pipe (16), the hot air pipe annular connecting pipe is connected to the outside through an air outlet pipe (15), the bottom of the hot air jacket is connected to a hot air inlet pipe (9) through a hot air equalizing pressure box (12), and a gate valve (10) is provided on the discharge pipe.

2. The partition-type phosphate rock mixture heating device according to claim 1 is characterized in that: A heat-insulating layer (14) is provided on the outer wall of the furnace body.

3. The partition-type phosphate rock mixture heating device according to claim 1 is characterized in that: A hot air pipe fixing frame (5) is also provided inside the furnace body.

4. The partition-type phosphate rock mixture heating device according to claim 1 is characterized in that: An inspection hole (6) is provided at the lower part of the furnace body.

5. The partition-type phosphate rock mixture heating device according to claim 1 is characterized in that: The furnace body has an observation hole (7) at the bottom.

6. The partition-type phosphate rock mixture heating device according to claim 1, characterized in that: A thermocouple 1 (4) is provided in the middle of the furnace body.

7. The partition-type phosphate rock mixture heating device according to claim 1 is characterized in that: The hot air inlet pipe is provided with a thermocouple II (8).

8. The partition-type phosphate rock mixture heating device according to claim 1 is characterized in that: The outer wall of the furnace body is also provided with a mounting lug (17).

9. The partition-type phosphate rock mixture heating device according to claim 1, characterized in that: The hot air equalizing pressure box is arranged in a ring shape outside the hot air jacket at the lower part of the furnace body.

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