Ammonium sulfate solid particle drying device

Abstract

The utility model discloses an ammonium sulfate solid particle drying device, which relates to the field of solid particle drying and comprises an outer sleeve shell, a hot air main pipe, a stock bin, a hot air recovery pipe and a fan, a drying box is mounted in an inner cavity of the outer sleeve shell, and a gap is reserved between the outer side face of the drying box and the inner wall of the outer sleeve shell to form a hot air circulation interlayer. Ammonium sulfate solid particles falling into the drying box through the feeding pipe are blown out of hot air through the multiple air blowing heads, the ammonium sulfate solid particles in the drying box are blown up and flow towards the discharging pipe, the ammonium sulfate solid particles are in continuous contact with the hot air in the flowing process, the temperature gradient is reduced, moisture is rapidly evaporated, and the drying effect is improved. The drying device is simple in structure and convenient to manufacture, maintain and use.

Description

Technical Field

[0001] The utility model belongs to the field of solid particle drying, and in particular relates to an ammonium sulfate solid particle drying device. Background Art

[0002] Desulfurization of ammonia nitrogen wastewater is an industrial chain. It is based on the absorption reaction of ammonia nitrogen wastewater and sulfur dioxide in flue gas. After oxidation and concentration, ammonium sulfate fertilizer is obtained. Ammonium sulfate fertilizer can be used in agricultural production, forming a circular economy industrial model that generates a usable resource from two wastes.

[0003] In the concentration section of the desulfurization tower, the heat of the high-temperature flue gas is used to concentrate the ammonium sulfate solution. The concentrated ammonium sulfate slurry is evaporated and then centrifuged. The ammonium sulfate solid particles separated by the centrifuge are discharged through the discharge port, and then the ammonium sulfate solid particles are dried and packaged.

[0004] The drying devices currently purchased have high purchase costs and subsequent use and maintenance costs, and are also unable to recycle heat energy.

[0005] Therefore, we developed an ammonium sulfate solid particle drying device to solve the above problems. Utility Model Content

[0006] In view of the problems that the currently purchased drying devices have high purchase cost and subsequent use and maintenance cost, and cannot perform secondary utilization of heat energy, the utility model provides an ammonium sulfate solid particle drying device.

[0007] The utility model solves the technical problem by adopting the following scheme: an ammonium sulfate solid particle drying device, comprising an outer shell, a hot air main pipe, a silo, a hot air recovery pipe and a fan, a drying box is installed in the inner cavity of the outer shell, and a gap exists between the outer side of the drying box and the inner wall of the outer shell to form a hot air circulation interlayer;

[0008] A feed pipe is installed on the top of the drying box, the upper end of which extends out of the outer shell, and a discharge pipe is installed on the side of the drying box, the outer end of which passes through the outer shell and is connected to the feed port of the silo;

[0009] The hot air main pipe is arranged at the bottom of the drying box, and its outer end extends out of the outer shell. N hot air branch pipes are installed on the side of the hot air main pipe, and M air blowing heads are installed on the top of the hot air branch pipes. The blowing end of the air blowing head extends upward to the back of the drying box and tilts downward to correspond to the inner bottom of the drying box.

[0010] The fan is installed on the top of the silo, and an exhaust pipe and an air inlet pipe are installed at the exhaust end and the air outlet end respectively. The bottom end of the exhaust pipe is connected to the exhaust port on the top of the silo, and the upper end of the air inlet pipe passes through the outer shell and is connected to the hot air circulation interlayer;

[0011] The hot air recovery pipe is installed on the outer shell, and the inner end of the hot air recovery pipe is communicated with the hot air circulation interlayer.

[0012] Preferably, the bottom of the drying box is inclined.

[0013] Preferably, a screw conveyor is also included, and a feed pipe of the screw conveyor is connected to the feed pipe.

[0014] Preferably, an outer sleeve is mounted on the outer side of the screw conveyor, a gap is formed between the inner wall of the outer sleeve and the outer wall of the screw conveyor to form a hot air circulation chamber, and a one-way air inlet valve and a one-way air outlet valve are respectively installed at both ends of the outer sleeve.

[0015] Preferably, an air intake pipe is installed at the bottom end of the one-way air intake valve, and the bottom end of the air intake pipe passes through the outer shell and extends to the hot air circulation interlayer.

[0016] Preferably, the bottom end of the one-way air outlet valve is connected to the hot gas recovery pipe.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The utility model drops ammonium sulfate solid particles into the drying box through a feed pipe, blows out hot air through multiple air blowing heads, blows up the ammonium sulfate solid particles in the drying box and flows toward the discharge pipe. The ammonium sulfate solid particles are constantly in contact with the hot air during the flow process, reducing the temperature gradient, allowing the water to evaporate quickly and being heated more evenly. The drying device has a simple structure, is easy to manufacture, maintain, and use.

[0019] 2. The utility model extracts the hot air in the silo through the fan and enters the hot air circulation interlayer through the air inlet pipe. The hot air circulates in the hot air circulation interlayer, which minimizes the heat energy loss, improves the utilization efficiency of heat energy, and reduces energy consumption.

[0020] 3. The utility model arranges an air inlet pipe and an outer sleeve so that hot exhaust gas can circulate in the hot air circulation chamber, thereby utilizing the hot exhaust gas. The screw conveyor pre-dries the ammonium sulfate solid particles during the conveying process of the ammonium sulfate solid particles, thereby better controlling the humidity of the ammonium sulfate solid particles, improving the drying efficiency, and improving the quality of the ammonium sulfate solid particles after drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0022] Figure 2 This is a front view cross-sectional structural diagram of the outer shell and the drying box of the utility model.

[0023] In the figure: 1 outer shell, 2 screw conveyor, 21 feeding pipe, 3 silo, 41 fan, 42 exhaust pipe, 43 air inlet pipe, 51 outer sleeve, 52 one-way air outlet valve, 53 one-way air inlet valve, 54 air inlet pipe, 61 hot air main pipe, 62 hot air branch pipe, 63 air blowing head, 7 drying box, 71 feeding pipe, 72 feeding pipe, 8 hot air recovery pipe. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] See also Figure 1-2 The utility model provides a technical solution for an ammonium sulfate solid particle drying device:

[0026] Embodiment 1:

[0027] according to Figure 1 and Figure 2 As shown, it includes an outer shell 1, a hot air main pipe 61, a silo 3, a hot air recovery pipe 8 and a fan 41. A drying box 7 is installed in the inner cavity of the outer shell 1. There is a gap between the outer side surface of the drying box 7 and the inner wall of the outer shell 1 to form a hot air circulation interlayer. The bottom of the drying box 7 is inclined to facilitate the flow of ammonium sulfate solid particles in the drying box 7 to the discharge pipe 71.

[0028] A feed pipe 72 is installed on the top of the drying box 7, and the upper end of the feed pipe 72 extends out of the outer shell 1. A discharge pipe 71 is installed on the side of the drying box 7. The outer end of the discharge pipe 71 passes through the outer shell 1 and is connected to the feed port of the silo 3, so that the dried ammonium sulfate solid particles enter the silo 3 for storage, so as to facilitate subsequent packaging and processing.

[0029] A hot air main pipe 61 is arranged at the bottom of the drying box 7, and its outer end extends out of the outer shell 1. N hot air branch pipes 62 are installed on the side of the hot air main pipe 61, and M air blowing heads 63 are installed on the top of the hot air branch pipe 62. The blowing end of the air blowing head 63 extends upward to the back of the drying box 7 and is tilted downward and folded to correspond to the inner bottom of the drying box 7. The blowing end is tilted downward so that the solid ammonium sulfate particles will not enter the air blowing head 63, avoiding the problem of clogging of the air blowing head 63. In addition, multiple air blowing heads 63 blow out hot air to blow up the solid ammonium sulfate particles in the drying box 7 and flow them in the direction of the discharge pipe 71. The solid ammonium sulfate particles are constantly in contact with the hot air during the flow process, reducing the temperature gradient, causing the water to evaporate rapidly, and the heating is more uniform.

[0030] The fan 41 is installed on the top of the silo 3, and an exhaust pipe 42 and an air inlet pipe 43 are respectively installed at the exhaust end and the air outlet end thereof. The bottom end of the exhaust pipe 42 is connected to the exhaust port on the top of the silo 3, and the upper end of the air inlet pipe 43 passes through the outer shell 1 and is connected to the hot air circulation interlayer. The hot air in the silo 3 is extracted by the fan 41 and enters the hot air circulation interlayer through the air inlet pipe 43. The hot air circulates in the hot air circulation interlayer, thereby minimizing the heat energy loss, improving the utilization efficiency of heat energy, and reducing energy consumption.

[0031] The heat recovery pipe 8 is installed on the outer shell 1, and its inner end is connected to the hot air circulation interlayer, so that the utilized hot exhaust gas enters the heat recovery pipe 8, so as to facilitate the subsequent filtering and purification of the hot exhaust gas.

[0032] When used specifically, the utility model provides a drying device for ammonium sulfate solid particles. First, the outlet end of the high-temperature blower 41 is connected to the outer end of the hot air main pipe 61, the hot air recovery pipe 8 is connected to the air inlet end of the waste gas treatment equipment, and then the ammonium sulfate solid particles are continuously added into the drying box 7 through the feed pipe 72;

[0033] The high-pressure hot air generated by the high-temperature blower 41 flows into the multiple hot air branch pipes 62 through the hot air main pipe 61, and is blown out through the multiple air blowing heads 63. The air blowing heads 63 blow out the hot air, blowing up the ammonium sulfate solid particles in the drying box 7 and flowing toward the discharge pipe 71. The ammonium sulfate solid particles are constantly in contact with the hot air during the flow process, reducing the temperature gradient, causing the water to evaporate quickly, and the heating is more uniform;

[0034] Finally, the dried ammonium sulfate solid particles are discharged into the silo 3 through the discharge pipe 71. At the same time, the fan 41 extracts the hot air in the silo 3 and enters the hot air circulation interlayer through the air inlet pipe 43. The hot air circulates in the hot air circulation interlayer and is finally discharged through the hot air recovery pipe 8.

[0035] Embodiment 2:

[0036] On the basis of the first embodiment, Figure 1 As shown, a screw conveyor 2 is also included, and a feed pipe 21 of the screw conveyor 2 is connected to the feed pipe 72, and the ammonium sulfate solid particles are transported by the screw conveyor 2.

[0037] An outer sleeve 51 is mounted on the outer side of the screw conveyor 2. A gap is formed between the inner wall of the outer sleeve 51 and the outer wall of the screw conveyor 2 to form a hot air circulation chamber, so that the hot exhaust gas can flow in the hot air circulation chamber and be utilized.

[0038] A one-way air inlet valve 53 and a one-way air outlet valve 52 are respectively installed at both ends of the outer sleeve 51. An air inlet pipe 54 is installed at the bottom end of the one-way air inlet valve 53. The bottom end of the air inlet pipe 54 passes through the outer sleeve 1 and extends to the hot air circulation interlayer. The bottom end of the one-way air outlet valve 52 is connected to the hot air recovery pipe 8.

[0039] The screw conveyor 2 pre-dries the ammonium sulfate solid particles during the conveying process of the ammonium sulfate solid particles, which can better control the humidity of the ammonium sulfate solid particles, improve the drying efficiency, and improve the quality of the ammonium sulfate solid particles after drying.

Claims

1. An ammonium sulfate solid particle drying device, comprising an outer shell, a hot air main pipe, a silo, a hot air recovery pipe and a fan, characterized in that: A drying box is installed in the inner cavity of the outer shell, and there is a gap between the outer side of the drying box and the inner wall of the outer shell to form a hot air circulation interlayer; A feed pipe is installed on the top of the drying box, the upper end of which extends out of the outer shell, and a discharge pipe is installed on the side of the drying box, the outer end of which passes through the outer shell and is connected to the feed port of the silo; The hot air main pipe is arranged at the bottom of the drying box, and its outer end extends out of the outer shell. N hot air branch pipes are installed on the side of the hot air main pipe, and M air blowing heads are installed on the top of the hot air branch pipes. The blowing end of the air blowing head extends upward to the back of the drying box and tilts downward to correspond to the inner bottom of the drying box. The fan is installed on the top of the silo, and an exhaust pipe and an air inlet pipe are installed at the exhaust end and the air outlet end respectively. The bottom end of the exhaust pipe is connected to the exhaust port on the top of the silo, and the upper end of the air inlet pipe passes through the outer shell and is connected to the hot air circulation interlayer; The hot air recovery pipe is installed on the outer shell, and the inner end of the hot air recovery pipe is communicated with the hot air circulation interlayer.

2. The ammonium sulfate solid particle drying device according to claim 1, characterized in that: The bottom of the drying box is arranged inclined.

3. The ammonium sulfate solid particle drying device according to claim 1, characterized in that: It also includes a screw conveyor, and a feed pipe of the screw conveyor is connected with the feed pipe.

4. The ammonium sulfate solid particle drying device according to claim 3, characterized in that: An outer sleeve is mounted on the outer side of the screw conveyor, a gap exists between the inner wall of the outer sleeve and the outer wall of the screw conveyor to form a hot air circulation chamber, and a one-way air inlet valve and a one-way air outlet valve are respectively installed at both ends of the outer sleeve.

5. The ammonium sulfate solid particle drying device according to claim 4, characterized in that: An air intake pipe is installed at the bottom end of the one-way air intake valve, and the bottom end of the air intake pipe passes through the outer shell and extends to the hot air circulation interlayer.

6. The ammonium sulfate solid particle drying device according to claim 5, characterized in that: The bottom end of the one-way air outlet valve is communicated with the hot air recovery pipe.

Images