Slurry conveying structure with blockage prevention function

Abstract

The utility model discloses a slurry conveying structure with dredging and plugging functions belongs to pipeline conveying technical field. Including pipeline, pump, discharge port and dredging mechanism, be equipped with the discharge valve on the discharge port and it is close to the discharge port setting of pump, the dredging mechanism includes discharge pipe, plug, drill rod and electric drill, the discharge port horizontal setting and its from inside to outside are connection section, three -way pipe section and plug section in proper order, and the connection section is connected with the pipeline, and the discharge valve is located between the connection section and three -way pipe section, and the downside of three -way pipe section is equipped with the discharge pipe, and the plug section is detachably equipped with the plug, the plug closes the outer end of plug section and is equipped with the drill rod on it along the discharge port direction, the drill rod rotates and is equipped on the plug, and it can move along the discharge port direction, and it is sealedly connected with the plug, and the inner end is equipped with the drill bit and can pass through the discharge valve inward, and the outer end is equipped with the connector of detachable connection with electric drill, when the pipeline normal work, the plug is removed, and the discharge valve is closed, when dredging, the plug is installed, and the discharge valve is opened.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline transportation technology, and specifically relates to a slurry transportation structure with a blockage-clearing function. Background Technology

[0002] The "slurry method" process uses dilute phosphoric acid as raw material to produce monoammonium phosphate through neutralization, concentration, spraying, and drying. Currently, the process flow of the "slurry method" is as follows: 20-30 wt% phosphoric acid supplied from the phosphoric acid workshop enters a forced circulation ammoniation reactor, where it undergoes a neutralization reaction with gaseous ammonia from the ammonia station. The degree of neutralization is controlled between 0.98 and 1.03. Then, a double-effect concentrator is used for concentration. The concentration process using a double-effect concentrator generally involves: the first effect using atmospheric pressure and fresh steam, and the second effect using the evaporated steam (or secondary steam) from the first effect as a heater heat source, employing vacuum concentration. The concentrated ammonium phosphate slurry is pumped by a high-pressure pump to the nozzle of the drying tower. After atomization by the pump's 4-8 MPa high pressure, it is sprayed into the drying tower, where it undergoes countercurrent drying with 120-135°C hot air from a hot air furnace. The slurry overflows from the bottom of the drying tower and is conveyed by a belt conveyor to the bulk storage silo.

[0003] For example, patent application number CN201210151672.3 discloses a method for producing granular monoammonium phosphate. The residual acid obtained from the purification of phosphoric acid is used as filter residue and mother liquor in the process of producing crystalline ammonium phosphate. The mixture is prepared by mixing the acid, wherein the ratio of mother liquor: filter residue: dilute phosphoric acid is 10:15:100, and the mixture is prepared by slurry method. The density of the mixed raw materials fed into the ammoniation reactor is controlled at 1.28-1.33 g / L. The degree of neutralization of the slurry is controlled at 1.05-1.25 through the ammoniation reaction process. The density of the slurry prepared by the concentration process is controlled at 1.40-1.46 g / L. The monoammonium phosphate slurry is first produced, and then granulation, drying, screening, crushing and cooling processes are carried out to obtain granular monoammonium phosphate product.

[0004] For example, patent application number CN202022823315.X discloses an energy-saving production system for powdered MPA, including an acid mixing tank, an external circulation reactor, a distributor, a powder spraying tower, and a steam distributor. The external circulation reactor is connected to the acid mixing tank through pipe A, and a pump A is installed on pipe A. The external circulation reactor is equipped with a steam condensate pipe and multiple ammonia gas pipes. The distributor is connected to the external circulation reactor through pipe B, and a pump B is installed on pipe B. The powder spraying tower is connected to the distributor through pipe C, and a pump C is installed on pipe C. The steam distributor is connected to the external circulation reactor through pipe D.

[0005] In existing technology, the slurry is transported from the phosphoric acid concentration unit to the powder spraying unit via a pipeline equipped with a pump. This technology requires regular maintenance of the pipeline and pump. Before maintenance, the slurry in the pipeline needs to be drained. Therefore, existing technology typically sets a discharge port (for discharging the slurry) on the pipeline near the pump outlet, with the discharge port vertically downwards and equipped with a discharge valve. During maintenance, the discharge valve is opened, and the pipeline and discharge port are manually tapped (ammonium phosphate slurry has a high density, and ammonium phosphate itself easily crystallizes, usually clogging the discharge port, requiring tapping to clear it), allowing the slurry to drain from the discharge port. This solution has the following problems: it is labor-intensive, usually requiring two people to tap dozens of times; and it may even fail to clear the blockage. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides a slurry conveying structure with unblocking function. During unblocking, the workload is low, and the operation of a hand drill is simple and labor-saving. The technical solution is as follows:

[0007] This utility model embodiment provides a slurry conveying structure with unblocking function, including a pipe 1 and a pump and a discharge port arranged sequentially on it. The discharge port is equipped with a discharge valve 2 and is located near the discharge port of the pump. The slurry conveying structure also includes an unblocking mechanism, which includes a discharge pipe 6, a plug 7, a drill rod 8, and a hand drill. The discharge port is horizontally arranged and consists of a connecting section 3, a tee section 4, and a plug section 5 arranged sequentially from the inside to the outside. The connecting section 3 is connected to the pipe 1, and the discharge valve 2 is located between the connecting section 3 and the tee section 4. A discharge pipe 6 is provided on the lower side of the pipe section 4, and a plug 7 is detachably provided on the plug section 5; the plug 7 closes the outer end of the plug section 5 and a drill rod 8 is provided on it along the discharge port direction; the drill rod 8 is rotatably provided on the plug 7, and it can move along the discharge port direction. It is sealed to the plug 7, and its inner end is provided with a drill bit that can pass inward through the discharge valve 2. Its outer end is provided with a connector 9 that can be detachably connected to an electric drill; when the pipe 1 is working normally, the plug 7 is removed and the discharge valve 2 is closed; when unblocking, the plug 7 is installed and the discharge valve 2 is opened.

[0008] In this embodiment of the present invention, pipe 1 is a phosphate slurry conveying pipe, which is located between the phosphate concentration device and the powder spraying device, and is covered with an insulation layer; the pump is a plunger pump; and no insulation layer is provided at the discharge port.

[0009] Specifically, in this embodiment of the present invention, the discharge port is perpendicular to the corresponding part of the pipe 1.

[0010] In this embodiment of the utility model, the discharge pipe 6 is set vertically downwards, with its lower part horizontally reaching the drainage ditch, and its end is set in a direction away from the plug 7.

[0011] In this embodiment of the present invention, the inner diameter of the tee section 4 is larger than the inner diameter of the connecting section 3 and the inner diameter of the plug section 5. The connecting section 3, the tee section 4 and the plug section 5 are coaxially arranged. The outer end of the connecting section 3 is connected to the inner end of the discharge valve 2 through the flange 10. The inner and outer ends of the tee section 4 are respectively connected to the outer end of the discharge valve 2 and the plug section 5 through the flange 10.

[0012] In this embodiment of the invention, the plug 7 is coaxially arranged with the plug section 5 and is threadedly connected to the plug section 5. From the inside to the outside, the plug 7 consists of a tapered portion 71, an externally threaded portion 72, and a raised ring portion 73. The diameter of the tapered portion 71 gradually increases from the inside to the outside and is smaller than the inner diameter of the plug section 5. The externally threaded portion 72 mates with the plug section 5 and has an external thread. The diameter of the raised ring portion 73 is larger than the inner diameter of the plug section 5. The inner wall of the plug section 5 has an internal thread that mates with the external thread.

[0013] Furthermore, in this embodiment of the present invention, one or more rotating handles 74 are provided radially on the circumferential surface of the convex ring portion 73.

[0014] In this embodiment of the present invention, the drill rod 8 is a round rod, which is coaxially arranged with the plug 7, and a sealing packing gland is provided between the drill rod and the plug 7.

[0015] Specifically, in this embodiment of the utility model, the output shaft of the electric drill is a hexagonal shaft, and the connector 9 is coaxially arranged with the drill rod 8 and is an internal hexagonal sleeve that cooperates with the hexagonal shaft.

[0016] The beneficial effects of the technical solution provided by this utility model embodiment are: This utility model embodiment provides a slurry conveying structure with unblocking function. When unblocking, the work intensity is low, the electric drill is simple and labor-saving to operate, the unblocking speed is fast, the operation is safe, and usually only one operator is needed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the slurry conveying structure with unblocking function in this embodiment of the present invention during normal operation;

[0018] Figure 2 This is a schematic diagram of the slurry conveying structure with unblocking function in this embodiment of the utility model during unblocking.

[0019] Figure 3 This is a structural diagram of the plug and drill pipe assembly;

[0020] Figure 4 This is an outer view of the plug and drill pipe assembly.

[0021] In the diagram: 1. Pipeline, 2. Discharge valve, 3. Connecting section, 4. Tee section, 5. Plug section, 6. Discharge pipe, 7. Plug, 8. Drill rod, 9. Connector, 10. Flange;

[0022] 71 Tapered part, 72 External threaded part, 73 Raised ring part, 74 Rotary handle. Detailed Implementation

[0023] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0024] Example 1

[0025] See Figure 1-4 This embodiment 1 provides a slurry conveying structure with unblocking function, including a pipeline 1, a pump, a discharge port, an unblocking mechanism, and a shut-off valve. The pump and discharge port are sequentially arranged on the pipeline 1 along the slurry conveying direction, and a shut-off valve is located at the inlet end. The discharge port is located near the pump outlet and is equipped with a discharge valve 2.

[0026] The unblocking mechanism includes a discharge pipe 6, a plug 7, a drill rod 8, and a hand drill. The discharge port is horizontally positioned and perpendicular to the corresponding part of pipe 1. From the inside out (in this embodiment, the end closer to pipe 1 is defined as the inside, and the end farther from pipe 1 as the outside), it consists of a connecting section 3, a tee section 4, and a plug section 5. The connecting section 3 connects to pipe 1 and is perpendicular to the corresponding part of pipe 1. Its inner diameter is approximately the same as that of pipe 1. A discharge valve 2 is located between the connecting section 3 and the tee section 4. The discharge pipe 6 is located on the lower side of the tee section 4. The discharge pipe 6 is vertically downward, with its lower part horizontally bent to a drainage ditch or other slurry discharge structure (such as a trough). Its end is oriented away from the plug 7 to prevent slurry from flowing towards the operator. The plug 7 is detachably mounted on the plug section 5; specifically, the plug 7 is threadedly connected to the plug section 5. The plug 7 closes the outer end of the plug section 5, and a drill rod 8 is mounted on it along the direction of the discharge port. The drill rod 8 is a round rod, which is coaxially arranged with the plug 7. A sealing stuffing box is provided between the drill rod 8 and the plug 7 (to ensure that the drill rod 8 can rotate and move axially). It is rotatably mounted on the plug 7 and can move along the discharge port direction. It is sealed to the plug 7. The inner end of the drill rod is equipped with a drill bit (which can be a conventional rotary drill bit) and can pass through the discharge valve 2. The outer end of the drill rod is equipped with a connector 9 that can be detachably connected to the electric drill. The length of the connector 9 should ensure that the inner end of the drill rod can pass through the discharge valve 2 but cannot pass through the pipe 1.

[0027] Among them, see Figure 1 When pipe 1 is operating normally, plug 7 is removed, discharge valve 2 is closed, stop valve is open, and the electric drill is not used. (See also...) Figure 2 During unblocking, the plug 7 is installed, the discharge valve 2 is opened, the stop valve is closed, and the electric drill is connected to the connector 9.

[0028] In this embodiment of the invention, the inner diameter of the tee section 4 is larger than the inner diameter of the connecting section 3 and the inner diameter of the plug section 5, while the inner diameter of the plug section 5 is smaller than the inner diameter of the connecting section 3. The connecting section 3, the tee section 4, and the plug section 5 are coaxially arranged. The outer end of the connecting section 3 is connected to the inner end of the discharge valve 2 via a flange 10. The inner and outer ends of the tee section 4 are respectively connected to the outer end of the discharge valve 2 and the plug section 5 via flanges 10. Specifically, flange bolts pass through the flanges of the connecting section 3, the discharge valve 2, and the tee section 4 to fix the connecting section 3, the discharge valve 2, and the tee section 4 together.

[0029] Specifically, in this embodiment of the utility model, the output shaft of the electric drill is a hexagonal shaft, and the connector 9 is coaxially arranged with the drill rod 8 and is an internal hexagonal sleeve that cooperates with the hexagonal shaft. The hexagonal shaft is inserted into the internal hexagonal sleeve to achieve a detachable connection.

[0030] Example 2

[0031] Example 2 provides a slurry conveying structure with a blockage-clearing function. Its structure is basically the same as that of Example 1, except that: in this example, pipe 1 is a phosphate slurry conveying pipe, located between the phosphoric acid concentration unit and the powder spraying unit, and is covered with an insulation layer. The pump is a plunger pump. No insulation layer is installed at the discharge port.

[0032] Example 3

[0033] See Figure 3-4 Example 3 provides a slurry conveying structure with a blockage-clearing function. Its structure is basically the same as that of Example 1, except that the plug 7 and plug section 5 are coaxially arranged in this embodiment. From the inside out, the plug 7 consists of a tapered portion 71, an externally threaded portion 72, and a raised ring portion 73. The tapered portion 71 has a diameter that gradually increases from the inside out and is smaller than the inner diameter of the plug section 5. Specifically, it is a frustum cone structure, and the diameter of its outer end is less than or equal to the diameter of the externally threaded portion 72. It is inserted into the plug section 5. The externally threaded portion 72 mates with the plug section 5 and has an external thread, connecting it threadedly. The diameter of the raised ring portion 73 is larger than the inner diameter of the plug section 5, and one or more rotating handles 74 are provided radially on its circumference to facilitate the installation of the plug 7. It is located outside the plug section 5. The inner wall of the plug section 5 has an internal thread that mates with the external thread. Specifically, a rotating handle 74 is provided on the circumference of the convex ring portion 73.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A slurry conveying structure with a blockage-clearing function, comprising a pipe (1) and a pump and a discharge port arranged sequentially thereon, wherein a discharge valve (2) is provided on the discharge port and is located near the discharge port of the pump; characterized in that, The slurry conveying structure also includes a dredging mechanism, which includes a discharge pipe (6), a plug (7), a drill rod (8), and a hand drill; the discharge port is horizontally arranged and consists of a connecting section (3), a tee section (4), and a plug section (5) from the inside out; the connecting section (3) is connected to the pipeline (1); the discharge valve (2) is located between the connecting section (3) and the tee section (4); the lower side of the tee section (4) is provided with a discharge pipe (6); and the plug section (5) is detachably provided with a plug (7); The plug (7) closes the outer end of the plug section (5) and has a drill rod (8) on it along the discharge port direction; the drill rod (8) is rotatably mounted on the plug (7) and can move along the discharge port direction. It is sealed to the plug (7), and its inner end is provided with a drill bit that can pass through the discharge valve (2). Its outer end is provided with a connector (9) that can be detachably connected to a hand drill; when the pipeline (1) is working normally, the plug (7) is removed and the discharge valve (2) is closed; when unblocking, the plug (7) is installed and the discharge valve (2) is opened.

2. The slurry conveying structure with anti-clogging function according to claim 1, characterized in that, The pipeline (1) is a phosphate slurry conveying pipeline, which is located between the phosphate concentration device and the powder spraying device, and is covered with an insulation layer; the pump is a plunger pump; no insulation layer is provided at the discharge port.

3. The slurry conveying structure with anti-clogging function according to claim 1, characterized in that, The discharge port is perpendicular to the corresponding part of the pipe (1).

4. The slurry conveying structure with anti-clogging function according to claim 1, characterized in that, The discharge pipe (6) is set vertically downwards, with its lower part horizontal to the drainage ditch, and its end is set away from the plug (7).

5. The slurry conveying structure with anti-clogging function according to claim 1, characterized in that, The inner diameter of the tee section (4) is larger than the inner diameter of the connecting section (3) and the inner diameter of the plug section (5). The connecting section (3), the tee section (4) and the plug section (5) are coaxially arranged. The outer end of the connecting section (3) is connected to the inner end of the discharge valve (2) through a flange (10). The inner and outer ends of the tee section (4) are connected to the outer end of the discharge valve (2) and the plug section (5) through flanges (10) respectively.

6. The slurry conveying structure with anti-clogging function according to claim 1, characterized in that, The plug (7) is coaxially arranged with the plug section (5) and is threadedly connected to the plug section (5). From the inside to the outside, the plug (7) consists of a tapered part (71), an external threaded part (72), and a convex ring part (73). The diameter of the tapered part (71) gradually increases from the inside to the outside and is smaller than the inner diameter of the plug section (5). The external threaded part (72) is fitted with the plug section (5) and has an external thread. The diameter of the convex ring part (73) is larger than the inner diameter of the plug section (5). The inner wall of the plug section (5) has an internal thread that fits with the external thread.

7. The slurry conveying structure with anti-clogging function according to claim 6, characterized in that, One or more rotating handles (74) are provided on the radial side of the circumference of the convex ring (73).

8. The slurry conveying structure with anti-clogging function according to claim 1, characterized in that, The drill rod (8) is a round rod, which is coaxially arranged with the plug (7), and a sealing packing gland is provided between the drill rod and the plug (7).

9. The slurry conveying structure with anti-clogging function according to claim 1, characterized in that, The output shaft of the electric drill is a hexagonal shaft, and the connector (9) is coaxially arranged with the drill rod (8) and is an internal hexagonal sleeve that cooperates with the hexagonal shaft.

Images