CN212051153U

CN212051153U - Utilize agitating unit of wet process phosphoric acid sludge production compound fertilizer

Info

Publication number: CN212051153U
Application number: CN202020567029.9U
Authority: CN
Inventors: 彭亮
Original assignee: Yichang Ezhong Ecological Engineering Co ltd
Current assignee: Yichang Ezhong Ecological Engineering Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-12-01
Anticipated expiration: 2030-04-16

Abstract

A stirring device for producing a compound fertilizer by using wet-process phosphoric acid sludge comprises a tank body, wherein one side of the tank body is provided with a magnesium oxide feeding mechanism and a gaseous ammonia feeding connecting port, and the other side of the tank body is provided with a phosphoric acid sludge feeding port; the internal (mixing) shaft that is equipped with of jar, the (mixing) shaft is through first motor drive, install planetary gear mechanism on the (mixing) shaft, every planet wheel coaxial arrangement of planetary gear mechanism has first pivot, installs the scraper blade in the first pivot, and the material of jar internal is mixed stirring and is scraped to the spiral blade combination on scraper blade and the (mixing) shaft. The utility model provides a pair of utilize agitating unit of wet process phosphoric acid sludge production compound fertilizer can improve the utilization ratio of purifying the sludge.

Description

Utilize agitating unit of wet process phosphoric acid sludge production compound fertilizer

Technical Field

The utility model belongs to the technical field of chemical fertilizer production and specifically relates to an utilize agitating unit of wet process phosphoric acid sludge production compound fertilizer.

Background

The wet process phosphoric acid production process adopted by the existing company is a dihydrate process, in the production process, neutralized slurry is naturally settled in a settling tank, the upper layer is ammonium phosphate clear liquid with low solid content, and the bottom is ammonium phosphate neutralized slag with high solid content. The ammonium phosphate neutralization slag is used for producing agricultural compound fertilizer after being filtered. For wet-process phosphoric acid sludge, the phosphoric acid is generally recovered abroad by a filter pressing method. And large-scale wet-process phosphoric acid production enterprises generate tens of thousands of tons to more than ten thousands of tons of phosphoric acid sludge every year, and the filter pressing and re-cleaning treatment has high requirements on filter pressing equipment, frequent filter cloth washing, large washing water consumption and large operation difficulty. It is common in China to add wet-process phosphoric acid into phosphoric acid sludge to prepare mixed wet-process phosphoric acid with a solid content of about 18-27%, and then neutralize the mixed wet-process phosphoric acid with ammonia to produce monoammonium phosphate with various nutrients. At present, monoammonium phosphate products with total nutrient content lower than 60 percent are seriously supplied and demanded, and the marketing difficulty is high. Or the use of phosphoric acid sludge for the production of superphosphate or calcium-rich, not only is there no technical economic advantage, but the new superphosphate standards require that the sulfur content be noted, but the superphosphate produced from phosphoric acid sludge is low in sulfur content.

Disclosure of Invention

The utility model aims to solve the technical problem that an utilize agitating unit of wet process phosphoric acid sludge production compound fertilizer is provided, utilizing phosphoric acid sludge production ammonium magnesium phosphate fertilizer in-process, can play fine mixing stirring effect and automatic scraper effect, avoid the sizing.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a stirring device for producing a compound fertilizer by using wet-process phosphoric acid sludge comprises a tank body, wherein one side of the tank body is provided with a magnesium oxide feeding mechanism and a gaseous ammonia feeding connecting port, and the other side of the tank body is provided with a phosphoric acid sludge feeding port; the internal (mixing) shaft that is equipped with of jar, the (mixing) shaft is through first motor drive, install planetary gear mechanism on the (mixing) shaft, every planet wheel coaxial arrangement of planetary gear mechanism has first pivot, installs the scraper blade in the first pivot, and the material of jar internal is mixed stirring and is scraped to the spiral blade combination on scraper blade and the (mixing) shaft.

The planetary gear mechanism comprises a sun gear arranged on the stirring shaft and a gear ring arranged on the inner wall of the tank body, a plurality of planet gears are meshed between the sun gear and the gear ring, the centers of the corresponding planet carriers are arranged on the stirring shaft through bearings, and the edges of the corresponding planet carriers are arranged on the first rotating shaft through bearings.

The length of the scrapers on the first rotating shaft is half of that of the first rotating shaft, and the scrapers on the first rotating shafts are alternately distributed up and down.

The bottom of the tank body is provided with a cover plate, and two sides of the cover plate are hinged with the cylinder.

The cover plate is provided with a communicating pipe which is connected with a sampling container, one end of the sampling container is provided with a pH detection probe, one end of the pH detection probe extends into the sampling container, and the other end of the pH detection probe is connected with a pH detector.

The utility model relates to an utilize agitating unit of wet process phosphoric acid sludge production compound fertilizer has following technological effect:

1) through setting up helical mixing blade to first pivot, the scraper blade that cooperation planetary gear mechanism drove utilizes the helical mixing blade at center to drive the material and carry by lower up and break up, stirs by outside scraper blade circumference rotation, turnover again, can improve the degree of consistency of stirring like this.

2) The cover plate opened by the cylinder in a direct driving mode is arranged, so that the discharging of materials can be facilitated, and the blockage caused by adhesion is avoided.

3) Set up pH detection mechanism on the apron through the device bottom, can conveniently carry out the pH value to this combined material fast and detect and change the sample, be favorable to obtaining the product that accords with the production requirement fast like this.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is an internal schematic view of the present invention.

Fig. 2 is a top view of the planetary gear mechanism of the present invention.

Fig. 3 is a partially enlarged schematic view of a portion a of fig. 1.

Fig. 4 is a schematic view of the magnesium oxide feeding mechanism of the present invention.

Fig. 5 is an enlarged schematic view of B in fig. 4.

In the figure: the device comprises a tank body 1, a gaseous ammonia feeding connecting port 2, a magnesium oxide feeding mechanism 3, a phosphoric acid sludge feeding port 4, a stirring shaft 5, a first motor 6, a planetary gear mechanism 7, a planetary gear 8, a first rotating shaft 9, a scraping plate 10, a spiral blade 11, a sun gear 12, a gear ring 13, a planetary carrier 14, a cover plate 15, a cylinder 16, a communicating pipe 17, a sampling container 18, a pH detection probe 19, a pH detector 20, a storage tank 3-1, a first discharger 3-2, a quantifying tank 3-3, a second discharger 3-4, a discharge pipe 3-5, an air blower 3-6, a level gauge 3-7, a shell 3-8, a rotating shaft 3-9 and a partition plate 3-10.

Detailed Description

As shown in fig. 1, a stirring device for producing a compound fertilizer by using wet-process phosphoric acid sludge comprises a tank body 1, wherein one side of the tank body 1 is provided with a gaseous ammonia feeding connecting port 2 and a magnesium oxide feeding mechanism 3, and the other side of the tank body 1 is provided with a phosphoric acid sludge feeding port 4; the gaseous ammonia feeding connector 2 is used for being connected with an ammonia pipeline and directly introducing gaseous ammonia; the magnesium oxide feeding mechanism 3 is used for quantitatively feeding magnesium oxide powder. And the phosphoric acid sludge feed port 4 is in a horn shape, so that weighed sludge is conveniently conveyed by a screw conveyor.

Jar internal (mixing) shaft 5 that is equipped with of body, (mixing) shaft 5 is through the drive of first motor 6, and 5 lower extremes of (mixing) shaft are equipped with helical blade 11, and helical blade 11 can carry out the upset stirring from top to bottom to the material. And because the sludge has certain viscosity, in order to avoid the material sticking on the side wall of the tank body 1, a planetary gear mechanism 7 is arranged at the upper part of the tank body 1, the planetary gear mechanism 7 comprises a sun gear 12 fixedly arranged on the stirring shaft 5 and a gear ring 13 fixedly arranged on the inner wall of the tank body 1, four planetary gears 8 are meshed between the sun gear 12 and the gear ring 13, and a first rotating shaft 9 is coaxially and fixedly arranged at the center of each planetary gear 8. The corresponding planet carrier 14 is mounted centrally on the mixer shaft 5 by means of bearings and peripherally on the first shaft 9 by means of bearings.

When the stirring shaft 5 rotates, the four planet wheels 8 rotate by themselves and run circumferentially around the axis of the stirring shaft 5. Scrapers 10 are mounted on the four first rotating shafts 9, and one scraper 10 is mounted on each first rotating shaft 9. The scrapers 10 are half the length of the first rotating shaft 9, two scrapers 10 are located at the upper end of the first rotating shaft 9, and the other two scrapers 10 are located at the lower end of the first rotating shaft 9. When the stirring shaft 5 rotates, the scraping plates are combined pairwise to respectively stir the tank body 1 close to the tank wall and scrape the tank wall. Thereby avoiding the waste caused by the adhesion of excessive raw materials on the inner wall of the tank body.

The bottom of the tank body 1 is provided with a cover plate 15, and two sides of the cover plate 15 are hinged with a cylinder 16. Therefore, the bottom can be conveniently and rapidly opened for direct discharging.

As shown in fig. 3, a communication pipe 17 is installed on the cover plate 15, an opening and closing valve is arranged on the communication pipe 17, the other end of the communication pipe 17 is connected with a sampling container 18, and a detachable plug is arranged at the lower end of the sampling container 18. A pH detection probe 19 extending into the sampling container 18 is arranged at one side in the sampling container 18, and the other end of the pH detection probe 19 is connected with a pH detector 20. The opening and closing valve on the communicating pipe 17 is opened, so that the sample can conveniently enter the container 18, the detection is convenient, and the plug at the lower part of the sampling container 18 is opened, so that the sample can be conveniently discharged and cleaned, and the next sampling is convenient. When the sample needs to be replaced, the opening and closing valve is closed, the plugging plug is opened, and after the sample is discharged, the plugging plug is covered. When the second sampling is needed, the open-close valve can be opened.

As shown in fig. 4-5, the magnesium oxide feeding mechanism 3 includes a storage tank 3-1, a high level indicator and a low level indicator are installed in the storage tank 3-1, and the level of the magnesium oxide powder in the storage tank 3-1 is monitored by the two level indicators 3-7.

The bottom of the material storage tank 3-1 is connected with the quantitative tank 3-3 through a first discharger 3-2. A high-level material level meter is arranged in the quantitative tank 3-3, and the discharged material amount is controlled in a quantitative mode through the material level meter. The bottom of the quantitative tank 3-3 is connected with a discharge pipe 3-5 through a second discharger 3-4, and the other end of the discharge pipe 3-5 is communicated with an air blower 3-6. The materials are blown out by the air blowers 3-6, so that scattering and mixing are facilitated, and the reaction efficiency is improved.

As shown in fig. 5, each of the first discharger 3-2 and the second discharger 3-4 includes a housing 3-8, a rotating shaft 3-9 is provided in the housing 3-8, the rotating shaft 3-9 is driven by a rotating motor, a plurality of partition plates 3-10 are circumferentially arranged on the rotating shaft 3-9, and outer edges of the partition plates 3-10 are attached to arc-shaped inner walls of two sides of the housing 3-8. As can be seen in the figure, the two partitions 3-10 on the left side or the two partitions 3-10 on the right side can form a closed space with the left or right side walls. In the process of rotating the rotating shaft 3-9, the materials falling from the upper part are blocked by the partition plates 3-9 and gradually fall. The discharger not only can play the role of active discharging, but also can avoid the blockage of the bottoms of the storage tank and the quantitative tank; in addition, the discharger can also play a role in closing the valve.

When magnesium oxide needs to be quantitatively added, the first discharger 3-2 is opened, materials fall into the quantitative tank 3-3, when a preset value is reached, the level indicator 3-7 detects a signal, the controller controls the first discharger 3-2 to stop moving, the second discharger 3-4 moves, the materials gradually enter the discharge pipe 3-5, the blower 3-6 is started, and the magnesium oxide is blown into the tank body 1 through the blower.

Here, set up in addition on work platform at jar body 1 one side and install the control cabinet, control the cabinet and mainly constitute by the cabinet body and electrical components and parts. The cabinet body is internally provided with a PLC, an alternating current contactor, a circuit breaker, a thermal relay, an intermediate relay, a fuse and the like.

Reference is made to the patent application No. 201410440019.8 "a process for producing magnesium ammonium phosphate fertilizer using wet phosphoric acid sludge", example 1.

In operation, a quantitative phosphoric acid sludge feed port 4 is first added through the phosphoric acid sludge feed port 4, and the stoichiometric molar ratio of the mixed materials is NH 4: mg: PO4 is 0.9 to 1.0: 0.7 to 1.0: 1.0, adding gaseous ammonia through a gaseous ammonia feeding connecting port 2 at normal temperature and normal pressure, stirring and neutralizing. After a period of time, after the pH value of the neutralized material is 3.5-4.5 displayed on the pH detector 20, magnesium oxide is quantitatively added through the magnesium oxide feeding mechanism 3, and the mixing time is controlled to be 15-60 minutes (in the process, sample cleaning is carried out, and secondary detection of the pH value is facilitated). After the stirring time is fixed, the pH value of the mixed material is detected again until the pH value is controlled between 6 and 8. After the mixed color is uniform, the cylinder 16 at one end extends out, so that the cover plate 15 is in an inclined state, and the materials are discharged downstream. And granulating at the later stage, and drying to obtain the magnesium ammonium phosphate fertilizer. The iron-based composite material contains 5.7% of ammonium nitrogen, 8.9% of water-soluble phosphorus pentoxide, 28.7% of effective phosphorus pentoxide, 7.4% of magnesium and 3.6% of iron.

Claims

1. The utility model provides an utilize agitating unit of wet process phosphoric acid sludge production compound fertilizer which characterized in that: comprises a tank body (1), wherein one side of the tank body (1) is provided with a gaseous ammonia feeding connecting port (2) and a magnesium oxide feeding mechanism (3), and the other side of the tank body (1) is provided with a phosphoric acid sludge feeding port (4); the stirring tank is characterized in that a stirring shaft (5) is arranged in the tank body (1), the stirring shaft (5) is driven by a first motor (6), a planetary gear mechanism (7) is installed on the stirring shaft (5), a first rotating shaft (9) is coaxially installed on each planetary gear (8) of the planetary gear mechanism (7), a scraper (10) is installed on the first rotating shaft (9), and the scraper (10) and a helical blade (11) on the stirring shaft (5) are combined to mix, stir and scrape materials in the tank body (1).

2. The stirring apparatus for producing a compound fertilizer using wet-process phosphoric acid sludge according to claim 1, wherein: the planetary gear mechanism (7) comprises a sun gear (12) arranged on the stirring shaft (5) and a gear ring (13) arranged on the inner wall of the tank body (1), a plurality of planet gears (8) are meshed between the sun gear (12) and the gear ring (13), the centers of corresponding planet carriers (14) are arranged on the stirring shaft (5) through bearings, and the edges of the corresponding planet carriers are arranged on the first rotating shaft (9) through bearings.

3. The stirring apparatus for producing a compound fertilizer using wet-process phosphoric acid sludge according to claim 1, wherein: the length of the scrapers (10) on the first rotating shaft (9) is half of that of the first rotating shaft (9), and the scrapers (10) on the first rotating shafts (9) are alternately distributed up and down.

4. The stirring apparatus for producing a compound fertilizer using wet-process phosphoric acid sludge according to claim 1, wherein: the tank body (1) is provided with a cover plate (15) at the bottom, and two sides of the cover plate (15) are hinged with the cylinder (16).

5. The stirring apparatus for producing a compound fertilizer using wet-process phosphoric acid sludge according to claim 4, wherein: the pH detection device is characterized in that a communicating pipe (17) is installed on the cover plate (15), the communicating pipe (17) is connected with a sampling container (18), a pH detection probe (19) with one end extending into the sampling container (18) is arranged on the sampling container (18), and the other end of the pH detection probe (19) is connected with a pH detector (20).