A screening device before secondary crushing of wet corn

Abstract

The utility model discloses a kind of screening devices before wet corn secondary crushing, by primary mill lower pump, primary embryo cyclone, pressure curved screen, secondary mill upper tank, secondary mill upper tank liquid level meter, secondary unloading valve, secondary crushing mill, secondary mill lower tank, secondary mill lower tank water adding valve, secondary mill lower tank liquid level meter, secondary mill lower pump and control module composition, in wet corn crushing process, traditional process is as follows: corn dilute slurry that primary embryo cyclone underflow comes out directly enters secondary crushing mill, since corn dilute slurry concentration is low, secondary crushing mill load is big, processing efficiency is low;The utility model increases pressure curved screen screening on primary embryo cyclone underflow discharge pipeline, secondary mill upper tank buffering, additionally increases liquid level control automatic control module, solve the problem that secondary crushing mill load is big, processing efficiency is low, also reduce the labor intensity of operator simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of wet corn crushing technology in the corn starch production process, and directly relates to a screening device for wet corn before secondary crushing. Background Technology

[0002] Currently, in corn starch production, the traditional process involves primary crushing of wet corn, primary germ separation, secondary crushing, and secondary germ separation. During operation, the qualified material from primary crushing passes through a germ hydrocyclone before entering the secondary crushing mill, which has a high load. By adding a pressure curved screen before the secondary crushing mill and a tank on the secondary mill, the qualified slurry from primary crushing can be screened out and directly enter the next process, reducing the load on the secondary crushing mill. At the same time, adding a liquid level control module can improve the output efficiency of the secondary crushing mill and reduce the labor intensity of operators. Therefore, it is essential to research a screening device before secondary crushing of wet corn. Summary of the Invention

[0003] The purpose of this invention is to address the problem that, during the crushing of wet corn, some of the material that passes the primary crushing is then subjected to secondary crushing after germ separation. The invention researches a screening device for wet corn before secondary crushing, and its technical solution is as follows:

[0004] This utility model discloses a screening device for wet corn before secondary crushing, comprising a primary mill downpour pump 1, a primary germ hydrocyclone 2, a pressure curved screen 3, a secondary mill upper tank 4, a secondary mill upper tank level gauge 5, a secondary discharge valve 6, a secondary crushing mill 7, a secondary mill downpour tank 8, a secondary mill downpour tank water inlet valve 9, a secondary mill downpour tank level gauge 10, a secondary mill downpour pump 11, and a control module 12. The outlet of the primary mill downpour pump 1 is connected to the inlet of the primary germ hydrocyclone 2 via a pipe, and the underflow outlet of the primary germ hydrocyclone 2 is connected to the inlet of the pressure curved screen 3 via a pipe. The oversize outlet of the pressure curved screen 3 is connected to... The inlet of the upper tank 4 of the secondary mill is connected to the pipeline. The undersize material of the pressure curved screen 3 is connected to the inlet of the lower tank 8 of the secondary mill through the pipeline. The level gauge 5 of the upper tank 4 of the secondary mill is installed at the bottom. The bottom outlet of the upper tank 4 of the secondary mill is connected to the secondary crusher 7 through the pipeline and the secondary discharge valve 6. The outlet of the secondary crusher 7 is connected to the inlet of the lower tank 8 of the secondary mill through the pipeline. The level gauge 10 of the lower tank 8 of the secondary mill is installed at the bottom. The outlet of the lower tank 8 of the secondary mill is connected to the lower pump 11 of the secondary mill through the pipeline and the valve. The water inlet valve 9 and the water inlet pipeline of the lower tank 8 of the secondary mill are installed at the top.

[0005] Furthermore, the control module 12 is electrically connected to the primary mill pump 1, the secondary mill upper tank level gauge 5, the secondary discharge valve 6, the secondary crusher 7, the secondary mill lower tank level gauge 10, and the secondary mill pump 11.

[0006] Furthermore, the primary grinding pump 1 and the secondary crushing mill 7 are operated by adjustable frequency conversion motors.

[0007] Furthermore, the pressure curved screen 3 adopts a screen surface with a screen gap width of 50um.

[0008] The purpose of this utility model is achieved as follows: the material pumped from the first-stage mill enters the inlet of the first-stage germ hydrocyclone; the top flow after swirling in the first-stage germ hydrocyclone is sent to the germ screening; the bottom flow after swirling in the first-stage germ hydrocyclone enters the inlet of the pressure curved screen; through the screening of the pressure curved screen, the qualified slurry is screened out and directly enters the second-stage mill lower tank; the material on the screen enters the second-stage mill upper tank, and then enters the second-stage crushing mill through the second-stage discharge valve for further crushing; the material after crushing in the second-stage crushing mill enters the second-stage mill lower tank, and is then pumped to the next process by the second-stage mill lower pump.

[0009] Furthermore, the control module adopts liquid level interlock control. Based on the full-load operation of the secondary crusher (80-95% operating load), the liquid level of the upper and lower tanks of the secondary crusher is adjusted by adjusting the power of the lower pump of the primary mill and the lower pump of the secondary mill, thereby adjusting the full-load operation of the secondary crusher.

[0010] The beneficial effects of this utility model are: by adding a screening device before secondary crushing, the qualified slurry from primary crushing is screened out and no longer enters the secondary crushing mill, which reduces the load on the secondary crushing mill and increases its output rate. At the same time, the automatic adjustment by the control module ensures that the secondary crushing mill operates at full load, reducing manual adjustment by personnel. Attached Figure Description

[0011] Appendix Figure 1 A schematic diagram of the structure of a screening device for secondary crushing of wet corn according to this utility model is shown.

[0012] Explanation of reference numerals in the attached figures:

[0013] 1. Primary mill under-pump; 2. Primary germ hydrocyclone; 3. Pressure curved screen; 4. Secondary mill upper tank; 5. Secondary mill upper tank level gauge; 6. Secondary discharge valve; 7. Secondary crushing mill; 8. Secondary mill lower tank; 9. Secondary mill lower tank water inlet valve; 10. Secondary mill lower tank level gauge; 11. Secondary mill under-pump; 12. Control module. Detailed Implementation

[0014] Now combined with the appendix Figure 1 The present invention provides a further description of a screening device for wet corn before secondary crushing.

[0015] This utility model discloses a screening device for wet corn before secondary crushing, comprising a primary mill downpour pump 1, a primary germ hydrocyclone 2, a pressure curved screen 3, a secondary mill upper tank 4, a secondary mill upper tank level gauge 5, a secondary discharge valve 6, a secondary crushing mill 7, a secondary mill downpour tank 8, a secondary mill downpour tank water inlet valve 9, a secondary mill downpour tank level gauge 10, a secondary mill downpour pump 11, and a control module 12. The outlet of the primary mill downpour pump 1 is connected to the inlet of the primary germ hydrocyclone 2 via a pipe, and the underflow outlet of the primary germ hydrocyclone 2 is connected to the inlet of the pressure curved screen 3 via a pipe. The oversize outlet of the pressure curved screen 3 is connected to... The inlet of the upper tank 4 of the secondary mill is connected to the pipeline. The undersize material of the pressure curved screen 3 is connected to the inlet of the lower tank 8 of the secondary mill through the pipeline. The level gauge 5 of the upper tank 4 of the secondary mill is installed at the bottom. The bottom outlet of the upper tank 4 of the secondary mill is connected to the secondary crusher 7 through the pipeline and the secondary discharge valve 6. The outlet of the secondary crusher 7 is connected to the inlet of the lower tank 8 of the secondary mill through the pipeline. The level gauge 10 of the lower tank 8 of the secondary mill is installed at the bottom. The outlet of the lower tank 8 of the secondary mill is connected to the lower pump 11 of the secondary mill through the pipeline and the valve. The water inlet valve 9 and the water inlet pipeline of the lower tank 8 of the secondary mill are installed at the top.

[0016] The working principle of this utility model is as follows: by adding a screening device before secondary crushing, the qualified slurry from primary crushing is screened out and no longer enters the secondary crushing mill, which reduces the load on the secondary crushing mill and increases its output rate. At the same time, the control module is used for automatic adjustment to ensure that the secondary crushing mill operates at full load and reduces manual adjustment by personnel.

Claims

1. A screening device for wet corn before secondary crushing, comprising a primary mill under-pump (1), a primary germ hydrocyclone (2), a pressure curved screen (3), a secondary mill upper tank (4), a secondary mill upper tank level gauge (5), a secondary discharge valve (6), a secondary crushing mill (7), a secondary mill lower tank (8), a secondary mill lower tank water inlet valve (9), a secondary mill lower tank level gauge (10), a secondary mill under-pump (11), and a control module (12), characterized in that: The outlet of the primary mill pump (1) is connected to the inlet of the primary germ hydrocyclone (2) through a pipe. The underflow port of the primary germ hydrocyclone (2) is connected to the inlet of the pressure curved screen (3) through a pipe. The oversize outlet of the pressure curved screen (3) is connected to the inlet of the secondary mill tank (4) through a pipe. The undersize of the pressure curved screen (3) is connected to the inlet of the secondary mill tank (8) through a pipe. A secondary mill tank level gauge (5) is installed at the bottom of the secondary mill tank (4). The bottom outlet of the secondary mill tank (4) is connected to the secondary crusher (7) through a pipe and a secondary discharge valve (6). The outlet of the secondary crusher (7) is connected to the inlet of the secondary mill tank (8) through a pipe. A secondary mill tank level gauge (10) is installed at the bottom of the secondary mill tank (8). The outlet of the secondary mill tank (8) is connected to the secondary mill pump (11) through a pipe and a valve. A secondary mill tank water inlet valve (9) and a water inlet pipe are installed at the top of the secondary mill tank (8).

2. The screening device for wet corn before secondary crushing according to claim 1, characterized in that: The pressure curved screen (3) uses a screen surface with a screen gap width of 50um.

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