Desulfurized gypsum airflow drying and calcining device and working method thereof

Abstract

The invention discloses a flue gas desulfurization gypsum airflow drying and calcining device and a working method thereof, and relates to the technical field of flue gas desulfurization gypsum processing.The flue gas desulfurization gypsum airflow drying and calcining device comprises a supporting frame, an airflow drying mechanism is arranged on one side of the supporting frame, and a pretreatment mechanism is installed at the top of the supporting frame and comprises a first shell; one end of the first shell is fixedly connected to one side of the supporting frame, the first motor works to drive the smashing roller connected with the first motor to rotate, the other smashing roller rotates along with the first motor, materials are smashed, the smashed materials are filtered through the filter screen, the materials are pretreated, the size of the materials entering the second connecting pipe is controlled, and the materials are smashed. The problems that too large particles enter the airflow drying mechanism, the drying effect is poor, when small particles are dried in hot airflow, the large particles are still in an insufficient treatment state, and the drying and calcining efficiency is affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of desulfurized gypsum processing, in particular to a desulfurized gypsum airflow drying and calcining device and a working method thereof. Background Art

[0002] Desulfurization gypsum is also known as flue gas desulfurization gypsum, sulfur gypsum or FGD gypsum. Its main components are the same as natural gypsum. The preparation of desulfurization gypsum requires airflow drying and calcination processes.

[0003] For example, the "A desulfurized gypsum drying and calcining equipment and production process" with publication number: CN103274615A, includes a drying drum, a calcining drum and an induced draft fan. The air inlet of the induced draft fan is connected to the calcining drum, the air outlet of the induced draft fan is connected to the tail end of the drying drum, the front end of the drying drum is connected to the first feeder and the second conveyor, the first feeder is connected to the first conveyor, the second conveyor is connected to the second feeder, the second feeder is connected to the calcining drum, and the heat source supply furnace is connected to the calcining drum through a hot air pipe.

[0004] In the prior art, gypsum is dried in the hot air flow during airflow drying, and the particle size of the desulfurized gypsum raw material will affect the efficiency of drying and calcination. When the desulfurized gypsum raw material is not pretreated, small particles are already dried in the hot air flow, while large particles are still in an insufficiently processed state. At the same time, larger particles of gypsum raw material hit the inner wall of the container during airflow drying, which will increase damage to the container and affect its service life. Summary of the invention

[0005] The object of the present invention is to provide a desulfurized gypsum airflow drying and calcining device and its working method, so as to solve the problem proposed in the above background technology that the particle size of the desulfurized gypsum raw material will affect the efficiency of drying and calcining, and that larger particles of gypsum raw material will hit the inner wall of the container during the airflow drying process, which will affect the service life of the device.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a desulfurized gypsum airflow drying and calcining device, comprising a support frame, an airflow drying mechanism is arranged on one side of the support frame, a pretreatment mechanism is installed on the top of the support frame, the pretreatment mechanism comprises a first shell, one end of the first shell is fixedly connected to one side of the support frame, the other end of the first shell is rotatably connected to the second shell, two crushing rollers are rotatably connected inside the first shell, one end of the two crushing rollers passes through one side of the first shell, one end of the two crushing rollers are fixedly connected to gears, and the two gears are meshed, one end of one of the crushing rollers is installed with a first belt assembly, one end of the crushing roller is installed with a first motor through the first belt assembly, one side of the first motor is fixedly connected to one side of the support frame, one side of the first shell is fixedly connected to a filter screen, a first material discharge frame is arranged outside the filter screen, one end of the first material discharge frame is fixedly connected to one side of the first shell, a quantity control mechanism is installed on the other end of the first material discharge frame, one side of the second shell is rotatably connected to an electric push rod, and one end of the electric push rod is rotatably connected to one side of the support frame.

[0007] Preferably, a rotating baffle is rotatably connected to the feed portion of the second shell.

[0008] Preferably, a positioning buckle assembly is installed at one end of the second shell, and one side of the positioning buckle assembly is installed at one end of the first shell.

[0009] Preferably, the quantity control mechanism includes a second belt assembly and a quantitative frame, one end of the quantitative frame is fixedly connected to one end of the first feeding frame, the other end of the quantitative frame is fixedly connected to the second feeding frame, and the internal rotation of the quantitative frame is connected to a control plate.

[0010] Preferably, one end of the regulating plate passes through the quantitative frame and is fixedly connected to one end of the second belt assembly, one end of the regulating plate is connected to the second motor through the second belt assembly, and one side of the second motor is fixedly connected to the outside of the quantitative frame.

[0011] Preferably, the airflow drying mechanism includes a fan, one end of the fan is fixedly connected to a first connecting pipe, the other end of the fan is fixedly connected to a fourth connecting pipe, one end of the fourth connecting pipe is fixedly connected to a cyclone separator, and the top side of the cyclone separator is fixedly connected to a third connecting pipe.

[0012] Preferably, the bottom of the cyclone separator is fixedly connected to a collector, and the bottom of the collector is fixedly connected to a feed frame.

[0013] Preferably, a screw feeder is fixedly connected to one end of the feed frame.

[0014] Preferably, one end of the third connecting pipe is fixedly connected to a drying cylinder, one end of the drying cylinder is fixedly connected to a second connecting pipe, and the outside of the second connecting pipe is fixedly connected to one end of a second material discharge frame.

[0015] A working method of a desulfurized gypsum airflow drying and calcining device comprises the following steps:

[0016] S1. Feed the material from the inlet of the second housing into the interior of the second housing, and drive the two crushing rollers to rotate in sequence through the first motor to crush the falling large pieces of material. The material is filtered through the filter screen, and the qualified small particles pass through the first feeding frame and enter the interior of the quantitative frame;

[0017] S2, the second motor drives the control plate to rotate, controls the speed and flow rate of the material entering the second connecting pipe, one end of the second connecting pipe is connected to the hot air furnace, and the material entering the second connecting pipe is transported to the inside of the drying cylinder, and the material is dried through multiple drying cylinders;

[0018] S3, the dried material is separated when passing through the cyclone separator, the dried material enters the inside of the collector, the tail gas enters the inside of the fourth connecting pipe, and the fan drives the gas inside the fourth connecting pipe to be sent out through the first connecting pipe;

[0019] S4. The material inside the collector passes downward through the feed frame and enters the interior of the screw feeder. The screw feeder transports the material to the calcining furnace for calcining.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, the first motor drives the connected pulverizing roller to rotate, and the other pulverizing roller rotates accordingly to pulverize the material. The pulverized material is filtered through the filter screen. The material is pre-treated to control the size of the material entering the second connecting pipe, and to prevent oversized particles from entering the airflow drying mechanism, resulting in poor drying effect. When small particles are dried in the hot airflow, large particles are still in an inadequately processed state, affecting the efficiency of drying and calcining.

[0022] 4. In the present invention, a quantitative frame is installed at the bottom of the first material discharge frame, and the second motor drives the control plate to rotate. The rotation of the control plate can control the speed and flow rate of the material entering the second connecting pipe, and the material is sent into the second connecting pipe in a controlled amount to prevent too much or too little material from entering and affecting the drying effect of the hot air on the material;

[0023] 3. In the present invention, the material sent into the second connecting pipe is moved toward the interior of the drying cylinder by hot air, and the material and the hot air perform spiral motion inside the drying cylinder. By setting up multiple drying cylinders, the hot air is in full contact with the material, so that the heat is quickly transferred to the material, avoiding local overheating or insufficient drying, and improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a first three-dimensional structural schematic diagram of a desulfurized gypsum airflow drying and calcining device according to the present invention;

[0025] Figure 2 It is a second three-dimensional structural schematic diagram of a desulfurized gypsum airflow drying and calcining device of the present invention;

[0026] Figure 3 This is a schematic diagram of the first connection structure of a pretreatment mechanism of a desulfurized gypsum airflow drying and calcining device according to the present invention;

[0027] Figure 4 This is a schematic diagram of the second connection structure of the pretreatment mechanism of a desulfurized gypsum airflow drying and calcining device of the present invention;

[0028] Figure 5 It is a schematic diagram of the disassembled structure of a pretreatment mechanism of a desulfurized gypsum airflow drying and calcining device of the present invention;

[0029] Figure 6 It is a schematic diagram of the connection structure of the control mechanism of a desulfurized gypsum airflow drying and calcining device of the present invention;

[0030] Figure 7 The present invention is a schematic diagram of the connection structure of the airflow drying mechanism of the desulfurized gypsum airflow drying and calcining device.

[0031] In the figure: 1. support frame; 2. pretreatment mechanism; 21. first shell; 22. positioning buckle assembly; 23. second shell; 24. rotating baffle; 25. first feed frame; 26. first motor; 27. first belt assembly; 28. electric push rod; 29. ​​filter; 210. crushing roller; 211. gear; 3. quantity control mechanism; 31. second belt assembly; 32. second feed frame; 33. quantitative frame; 34. control plate; 35. second motor; 4. airflow drying mechanism; 41. fan; 42. first connecting pipe; 43. collector; 44. cyclone separator; 45. drying cylinder; 46. second connecting pipe; 47. third connecting pipe; 48. feed frame; 49. fourth connecting pipe; 410. screw feeder. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Reference Figure 1 - Figure 7 As shown: a desulfurized gypsum airflow drying and calcining device, comprising a support frame 1, an airflow drying mechanism 4 is arranged on one side of the support frame 1, a pretreatment mechanism 2 is installed on the top of the support frame 1, the pretreatment mechanism 2 comprises a first shell 21, one end of the first shell 21 is fixedly connected to one side of the support frame 1, the other end of the first shell 21 is rotatably connected to a second shell 23, two crushing rollers 210 are rotatably connected inside the first shell 21, one end of the two crushing rollers 210 passes through one side of the first shell 21, one end of the two crushing rollers 210 are fixedly connected to a gear 211, the two gears 211 are meshed, one end of one of the crushing rollers 210 is installed with a first belt assembly 27, one end of the crushing roller 210 is installed with a first motor 26 through the first belt assembly 27, one side of the first motor 26 is fixedly connected to one side of the support frame 1, one side of the first shell 21 is fixedly connected to a filter screen 29, the outside of the filter screen 29 is provided with a first material discharge frame 25, the first material discharge frame One end of 25 is fixedly connected to one side of the first shell 21, and the other end of the first blanking frame 25 is equipped with a control mechanism 3, one side of the second shell 23 is rotatably connected to an electric push rod 28, and one end of the electric push rod 28 is rotatably connected to one side of the support frame 1; the feeding part of the second shell 23 is rotatably connected to a rotating baffle 24; one end of the second shell 23 is equipped with a positioning buckle assembly 22, and one side of the positioning buckle assembly 22 is installed at one end of the first shell 21; the control mechanism 3 includes a second belt assembly 31 and a quantitative frame 33, one end of the quantitative frame 33 is fixedly connected to one end of the first blanking frame 25, the other end of the quantitative frame 33 is fixedly connected to the second blanking frame 32, and the inside of the quantitative frame 33 is rotatably connected to a regulating plate 34; one end of the regulating plate 34 passes through the quantitative frame 33 and is fixedly connected to one end of the second belt assembly 31, one end of the regulating plate 34 is connected to a second motor 35 through the second belt assembly 31, and one side of the second motor 35 is fixedly connected to the outside of the quantitative frame 33.

[0034] The material is fed in from the entrance on one side of the second shell 23. A rotating baffle 24 is rotatably connected at the entrance of the second shell 23. The rotating baffle 24 can be opened inwardly to facilitate the rotation of the baffle 24 to close the entrance of the second shell 23 after feeding. When the material passes through the two sets of crushing rollers 210, the first belt assembly 27 is composed of two pulleys and a conveyor belt. The crushing roller 210 connected thereto is driven to rotate by the first motor 26. The two gears 211 are meshed to drive the other crushing roller 210 to rotate. A tooth piece is arranged on the inner side of the first shell 21. The two crushing rollers 210 and the tooth piece cooperate to crush the material. The crushed material is filtered through the filter screen 29. The qualified material passes through the first unloading frame 25 and enters the interior of the quantitative frame 33. By pre-treating the material, the material entering the second connecting pipe 46 is controlled. The size of the particles is determined by the size of the particles, and the drying effect is poor. When the small particles are dried in the hot air flow, the large particles are still in an insufficiently processed state, which affects the efficiency of drying and calcining. The second belt assembly 31 is composed of a fixed cover, two pulleys and a conveyor belt. The second motor 35 drives the regulating plate 34 to rotate. The rotation of the regulating plate 34 can control the speed and flow rate of the material entering the second connecting pipe 46, and the material is sent into the second connecting pipe 46 in a controlled amount to prevent too much or too little material from entering and affecting the drying effect of the hot air on the material. After the material processing is completed, the electric push rod 28 can drive one end of the second shell 23 to rotate on the rotating first shell 21, and the buckle of the positioning buckle assembly 22 is separated, and the second shell 23 is rotated to open, and the residual material in the first shell 21 is processed.

[0035] Embodiment 2: Figure 1 , Figure 2 and Figure 7 As shown, the airflow drying mechanism 4 includes a fan 41, one end of the fan 41 is fixedly connected to a first connecting pipe 42, the other end of the fan 41 is fixedly connected to a fourth connecting pipe 49, one end of the fourth connecting pipe 49 is fixedly connected to a cyclone separator 44, and the top side of the cyclone separator 44 is fixedly connected to a third connecting pipe 47; the bottom of the cyclone separator 44 is fixedly connected to a collector 43, and the bottom of the collector 43 is fixedly connected to a feed frame 48; one end of the feed frame 48 is fixedly connected to a spiral feeder 410; one end of the third connecting pipe 47 is fixedly connected to a drying cylinder 45, one end of the drying cylinder 45 is fixedly connected to a second connecting pipe 46, and the outside of the second connecting pipe 46 is fixedly connected to one end of the second unloading frame 32.

[0036] A hot air furnace is connected to one end of the second connecting pipe 46 to deliver hot air to the inside of the second connecting pipe 46. The processed material enters the second connecting pipe 46 and is carried by the hot air to the inside of the drying cylinder 45. The material and the hot air perform a spiral motion in the drying cylinder 45. By providing a plurality of drying cylinders 45, the drying effect of the material can be improved. The dried material enters the inside of the cyclone separator 44 through the third connecting pipe 47. The cyclone separator 44 separates the material from the gas by operation. The fan 41 drives the gas to be discharged from the first connecting pipe 42 through the fourth connecting pipe 49. The material passes downward through the collector 43 and the feed frame 48 into the inside of the screw feeder 410. The screw feeder 410 drives the material from the outlet into the calcining furnace for calcination.

[0037] Embodiment 3: A working method of a desulfurized gypsum airflow drying and calcining device, comprising the following steps:

[0038] Step 1: Feed the material into the interior of the second housing 23 from the entrance of the second housing 23, and drive the two crushing rollers 210 to rotate in turn through the first motor 26 to crush the falling large pieces of material. The material is filtered through the filter screen 29, and the qualified small particle material passes through the first feeding frame 25 and enters the interior of the quantitative frame 33.

[0039] Step 2: The second motor 35 drives the control plate 34 to rotate, and controls the speed and flow rate of the material entering the second connecting pipe 46. One end of the second connecting pipe 46 is connected to the hot air furnace, and the material entering the second connecting pipe 46 is transported to the drying cylinder 45, and the material is dried through multiple drying cylinders 45;

[0040] Step 3: The dried material is separated when passing through the cyclone separator 44, and the dried material enters the interior of the collector 43, and the tail gas enters the interior of the fourth connecting pipe 49. The fan 41 drives the gas inside the fourth connecting pipe 49 to be sent out through the first connecting pipe 42;

[0041] Step 4: The material inside the collector 43 passes downward through the feed frame 48 and enters the interior of the screw feeder 410 . The screw feeder 410 is operated to transport the material to the calcining furnace for calcining.

[0042] The working principle and use method of the device are as follows: the material is fed in from the entrance on one side of the second shell 23, and the first motor 26 drives the connected crushing roller 210 to rotate, and the other crushing roller 210 rotates accordingly to crush the material, and the crushed material is filtered through the filter screen 29, and the qualified material passes through the first unloading frame 25 and enters the interior of the quantitative frame 33 to pre-treat the material, and the second motor 35 drives the control plate 34 to rotate to control the speed and flow rate of the material entering the second connecting pipe 46, and a hot air furnace is connected to one end of the second connecting pipe 46 to send hot air to the interior of the second connecting pipe 46, and the material enters the interior of the second connecting pipe 46 and is entrained by the hot air to the drying cylinder 4 5, the material and the hot air move in a spiral shape inside the drying cylinder 45 to dry the material, and the dried material enters the inside of the cyclone separator 44 through the third connecting pipe 47. The cyclone separator 44 works to separate the material from the gas, and the fan 41 drives the gas to be discharged from the first connecting pipe 42 through the fourth connecting pipe 49. The material passes downward through the collector 43 and the feed frame 48 and enters the inside of the screw feeder 410. The screw feeder 410 drives the material from the outlet to enter the calcining furnace for calcining processing. The electric push rod 28 drives one end of the second shell 23 to rotate, and the second shell 23 is opened, so that the residual material in the first shell 21 can be processed.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A desulfurized gypsum airflow drying and calcining device, comprising a support frame (1), characterized in that: An airflow drying mechanism (4) is provided on one side of the support frame (1); a pretreatment mechanism (2) is installed on the top of the support frame (1); the pretreatment mechanism (2) comprises a first shell (21); one end of the first shell (21) is fixedly connected to one side of the support frame (1); the other end of the first shell (21) is rotatably connected to a second shell (23); two crushing rollers (210) are rotatably connected inside the first shell (21); one end of the two crushing rollers (210) passes through one side of the first shell (21); one end of the two crushing rollers (210) is fixedly connected to a gear (211); the two gears (211) are meshed with each other; one end of one of the crushing rollers (210) is connected to the second shell (23); A first belt assembly (27) is installed at one end of the crushing roller (210), a first motor (26) is installed at one end of the crushing roller (210) through the first belt assembly (27), one side of the first motor (26) is fixedly connected to one side of the support frame (1), one side of the first shell (21) is fixedly connected to a filter screen (29), a first material discharge frame (25) is arranged outside the filter screen (29), one end of the first material discharge frame (25) is fixedly connected to one side of the first shell (21), a quantity control mechanism (3) is installed at the other end of the first material discharge frame (25), one side of the second shell (23) is rotatably connected to an electric push rod (28), one end of the electric push rod (28) is rotatably connected to one side of the support frame (1).

2. A desulfurized gypsum airflow drying and calcining device according to claim 1, characterized in that: A rotating baffle (24) is rotatably connected to the feed portion of the second housing (23).

3. A desulfurized gypsum airflow drying and calcining device according to claim 2, characterized in that: A positioning buckle assembly (22) is installed at one end of the second housing (23), and one side of the positioning buckle assembly (22) is installed at one end of the first housing (21).

4. A desulfurized gypsum airflow drying and calcining device according to claim 3, characterized in that: The quantity control mechanism (3) comprises a second belt assembly (31) and a quantitative frame (33), one end of the quantitative frame (33) is fixedly connected to one end of the first unloading frame (25), the other end of the quantitative frame (33) is fixedly connected to the second unloading frame (32), and the interior of the quantitative frame (33) is rotatably connected to a regulating plate (34).

5. A desulfurized gypsum airflow drying and calcining device according to claim 4, characterized in that: One end of the regulating plate (34) passes through the quantitative frame (33) and is fixedly connected to one end of the second belt assembly (31); one end of the regulating plate (34) is connected to a second motor (35) through the second belt assembly (31); one side of the second motor (35) is fixedly connected to the outside of the quantitative frame (33).

6. A desulfurized gypsum airflow drying and calcining device according to claim 5, characterized in that: The airflow drying mechanism (4) comprises a fan (41), one end of the fan (41) is fixedly connected to a first connecting pipe (42), the other end of the fan (41) is fixedly connected to a fourth connecting pipe (49), one end of the fourth connecting pipe (49) is fixedly connected to a cyclone separator (44), and the top side of the cyclone separator (44) is fixedly connected to a third connecting pipe (47).

7. A desulfurized gypsum airflow drying and calcining device according to claim 6, characterized in that: The bottom of the cyclone separator (44) is fixedly connected to a collector (43), and the bottom of the collector (43) is fixedly connected to a feed frame (48).

8. A desulfurized gypsum airflow drying and calcining device according to claim 7, characterized in that: One end of the feed frame (48) is fixedly connected to a screw feeder (410).

9. A desulfurized gypsum airflow drying and calcining device according to claim 8, characterized in that: One end of the third connecting pipe (47) is fixedly connected to the drying cylinder (45), one end of the drying cylinder (45) is fixedly connected to the second connecting pipe (46), and the outside of the second connecting pipe (46) is fixedly connected to one end of the second material discharge frame (32).

10. A working method of a desulfurized gypsum airflow drying and calcining device, characterized in that: A desulfurized gypsum airflow drying and calcining device according to any one of claims 1 to 9 is used, comprising the following steps: S1, feeding the material into the interior of the second housing (23) from the inlet of the second housing (23), and driving the two crushing rollers (210) to rotate in sequence through the operation of the first motor (26), crushing the falling large pieces of material, filtering the material through the filter screen (29), and the qualified small particles of material pass through the first feeding frame (25) and enter the interior of the quantitative frame (33); S2, the second motor (35) drives the control plate (34) to rotate, and controls the speed and flow rate of the material entering the second connecting pipe (46). One end of the second connecting pipe (46) is connected to the hot air furnace, and the material entering the second connecting pipe (46) is transported to the drying cylinder (45) of the material box, and the material is dried through multiple drying cylinders (45); S3, the dried material is separated when passing through the cyclone separator (44), the dried material enters the interior of the collector (43), the tail gas enters the interior of the fourth connecting pipe (49), and the fan (41) drives the gas inside the fourth connecting pipe (49) to be sent out through the first connecting pipe (42); S4. The material inside the collector (43) passes downward through the feed frame (48) and enters the interior of the screw feeder (410). The screw feeder (410) is operated to transport the material to the calcining furnace for calcining.

Images