Bulk urea storage and liquid preparation equipment

Abstract

The utility model discloses a bulk urea storage and liquid preparation device, which belongs to the technical field of urea liquid preparation, and specifically is a bulk urea storage and liquid preparation device, comprising a urea storage tank; wherein: the urea storage tank, the side wall of the urea storage tank arranged at a high position is provided with a urea discharge port, and the input end of the urea discharge port is provided with a pneumatic conveying pipeline. In the bulk urea storage and liquid preparation device, dry compressed air forms a dry micro-positive pressure environment in the urea storage tank and the discharge pipe, and the humid air in the air cannot enter, so as to avoid urea caking; secondly, an ejector is used to inhale urea for preliminary mixing and dissolution, and further heated and dissolved through a primary dissolution tank and a secondary dissolution tank, and cooperates with a built-in overflow plate to increase the dissolution time, so that the urea is fully dissolved, and the function of continuously preparing urea solution can be realized; finally, the dissolution tank is arranged at a high position, and except for the ejector water supply pump, there is no transfer water pump in the whole dissolution process, so the equipment failure rate is low and the maintenance is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of urea liquid preparation, in particular to bulk urea storage and liquid preparation equipment. Background Art

[0002] Urea is a neutral fertilizer that is suitable for all kinds of soils and plants. It is easy to store, convenient to use, and has little destructive effect on the soil. It is a chemical nitrogen fertilizer with a large usage volume and also the nitrogen fertilizer with the highest nitrogen content. Urea is synthesized industrially using ammonia and carbon dioxide under certain conditions.

[0003] Because urea is easy to transport and store and has little safety risk, denitrification systems are increasingly inclined to use urea as a reducing agent.

[0004] At present, traditional urea storage and dispensing equipment generally uses bagged urea. When dispensing, the bagged urea is hoisted to the dissolving platform, and the packaging bag is cut open manually to pour the urea into the dissolving tank. Leakage is inevitable during the operation. The working environment of the entire urea storage room and solution preparation room is poor, and long-term work has an adverse effect on the health of workers. Alternatively, bulk urea storage silos are used, but there are disadvantages such as urea hardening in the storage silo due to moisture and a complex system. These are actual problems that need to be solved urgently. Utility Model Content

[0005] The purpose of the utility model is to provide a bulk urea storage and dispensing equipment to solve the problem that the traditional urea storage and dispensing equipment mentioned in the above background technology generally adopts bagged urea. When dispensing, the bagged urea is hung on the dissolving platform, and the packaging bag is cut open manually to pour the urea into the dissolving tank. Leakage is inevitable during the operation, the working environment of the entire urea storage room and the solution preparation room is poor, and long-term work has an adverse effect on the health of workers. Alternatively, a bulk urea storage bin is used, but there are problems such as the urea in the storage bin being hardened due to moisture and the system being complicated.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising a urea storage tank;

[0007] in:

[0008] A urea storage tank, wherein a urea discharge port is disposed on the side wall of the high-positioned urea storage tank, a pneumatic conveying pipeline is disposed at the input end of the urea discharge port, and an exhaust port is disposed on the top of the urea storage tank;

[0009] A feed pipe is provided at the bottom of the urea storage tank, and a feed valve and dry compressed air inlets are provided on the circumferential outer wall of the feed pipe at the upper and lower sides of the feed valve;

[0010] A screw feeder is provided at the bottom of the feed pipe, an ejector is provided at the output end of the screw feeder, and an ejector pipe is provided at the output end of the ejector;

[0011] The output end of the injection pipe is connected to a dissolving assembly through a flange, and the dissolving assembly includes a primary dissolving tank and a secondary dissolving tank, an overflow plate 1 is arranged between the primary dissolving tank and the secondary dissolving tank, and an overflow plate 2 is arranged on the inner wall of the secondary dissolving tank;

[0012] The dissolving component further comprises a stirrer disposed on the top thereof and a steam heater disposed on the bottom thereof;

[0013] A urea solution storage tank is provided at the bottom output end of the overflow plate 2.

[0014] Preferably, a water inlet for the water sprinkler is provided on the side wall of the ejector, and an input end of the water inlet for the water sprinkler is connected to a water pipe via a flange.

[0015] Preferably, the agitator includes a stirring rod arranged at its output end, and a combination ring 1 and a combination ring 2 which are sleeved on the circumferential outer wall of the stirring rod, the circumferential outer wall of the combination ring 1 is provided with a stirring blade 1, and the circumferential outer wall of the combination ring 2 is provided with a stirring blade 2.

[0016] Preferably, a liquid level gauge is provided on the front side wall of the urea solution storage tank.

[0017] Preferably, the left side wall of the urea solution storage tank is connected with a urea solution outlet via a flange.

[0018] Preferably, the overflow plate 1 includes a panel 1, the side wall of the panel 1 is provided with an overflow groove 1, the side wall of the panel 1 is provided with a side panel, the top of the panel 1 is provided with a top plate, the bottom of the panel 1 is provided with a bottom plate 1, the side wall of the side panel, the top plate and the bottom plate 1 are provided with a panel 2, and the side wall of the panel 2 is provided with an overflow groove 2.

[0019] Preferably, a bottom plate 2 is provided at the bottom of the overflow plate 2, and an overflow trough 3 is provided at the bottom of the bottom plate 2.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] This bulk urea storage and dispensing equipment uses a combination of accessories. First, dry compressed air forms a dry, slightly positive pressure environment in the urea storage tank and the discharge pipe, and the humid air in the air cannot enter, avoiding urea compaction; secondly, an ejector is used to inhale urea for preliminary mixing and dissolution, and further heated and dissolved in the primary and secondary dissolution tanks. With the built-in overflow plate, the dissolution time is increased to fully dissolve the urea, and the function of continuous configuration of urea solution can be realized; finally, the dissolution tank is arranged at a high position. Except for the ejector water supply pump, there is no transfer water pump in the entire dissolution process, so the equipment has a low failure rate and simple maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a structural schematic diagram of an overflow plate of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the overflow plate 2 of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the agitator of the utility model.

[0027] In the figure: 1. urea storage tank; 2. urea discharge port; 3. exhaust port; 4. dry compressed air inlet; 5. unloading valve; 6. screw feeder; 7. ejector; 8. ejector water inlet; 9. agitator; 91. stirring rod; 92. combination ring one; 93. stirring blade one; 94. combination ring two; 95. stirring blade two; 10. steam heater; 11. liquid level gauge; 12. urea solution outlet; 13. urea solution storage tank; 14. primary dissolving tank; 15. secondary dissolving tank; 16 overflow plate one; 161. panel one; 162. overflow trough one; 163. side plate; 164. top plate; 165. bottom plate one; 166. panel two; 167. overflow trough two; 17. overflow plate two; 171. bottom plate two; 172. overflow trough three. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] The utility model provides a bulk urea storage and liquid preparation device. Dry compressed air forms a dry micro-positive pressure environment in the urea storage tank and the discharge pipe, and the moist air in the air cannot enter, so as to avoid urea caking. Secondly, an ejector is used to inhale urea for preliminary mixing and dissolution, and further heated and dissolved through a primary dissolution tank and a secondary dissolution tank. With the built-in overflow plate, the dissolution time is increased, so that the urea is fully dissolved, and the function of continuously preparing urea solution can be realized. Finally, the dissolution tank is arranged at a high position. Except for the ejector water supply pump, there is no transfer water pump in the whole dissolution process, so the equipment has a low failure rate and is simple to maintain.

[0032] See also Figure 1 to Figure 4 , comprising a urea storage tank 1, a urea discharge port 2 is arranged on the side wall of the high-positioned urea storage tank 1, the urea storage tank 1 is cylindrical, and the bottom is conical, a pneumatic conveying pipeline is arranged at the input end of the urea discharge port 2, urea enters from the urea discharge port 02 through the pneumatic conveying pipeline, and an exhaust port 3 is arranged on the top of the urea storage tank 1;

[0033] Secondly, a feed pipe is provided at the bottom of the urea storage tank 1, and a feed valve 5 and dry compressed air inlets 4 are provided on the circumferential outer wall of the feed pipe, and dry compressed air is respectively fed into the feed valve 05 from the upper and lower dry compressed air inlets 04;

[0034] Next, a screw feeder 6 is provided at the bottom of the feed pipe, an ejector 7 is provided at the output end of the screw feeder 6, an ejector pipe is provided at the output end of the ejector 7, and the ejector 07 is used to preliminarily mix urea and water and transport them to the dissolving component;

[0035] The output end of the injection pipe is connected to a dissolving assembly through a flange, and the dissolving assembly includes a primary dissolving tank 14 and a secondary dissolving tank 15. An overflow plate 16 is provided between the primary dissolving tank 14 and the secondary dissolving tank 15, and an overflow plate 2 17 is provided on the inner wall of the secondary dissolving tank 15. The primary dissolving tank 14 and the secondary dissolving tank 15 are arranged above the urea solution storage tank 13, and the liquid in the primary dissolving tank 14 enters the secondary dissolving tank 15 through overflow;

[0036] The dissolving assembly further includes an agitator 9 disposed at the top thereof and a steam heater 10 disposed at the bottom thereof;

[0037] A urea solution storage tank 13 is provided at the bottom output end of the overflow plate 2 17, and the liquid in the secondary dissolution tank 15 enters the urea solution storage tank 13 through overflow;

[0038] In specific use, first, bulk urea is transported to the site by a transport vehicle, and then the on-board pneumatic conveying equipment delivers the bulk urea from the urea discharge port 2 into the urea storage tank 1, and the gas is discharged from the exhaust port 3; after the discharge is completed, dry compressed air enters from the dry compressed air inlet 4 to remove the moist air in the urea storage tank 1, and keep the inside of the urea storage tank 1, the unloading valve 5 and the screw feeder 6 dry to prevent urea from hardening; the unloading valve 5 has two opening and closing modes, manual and automatic. After the unloading valve 5 is opened, urea enters the screw feeder 6 under the action of gravity; the screw feeder 6 is driven by a variable frequency drive motor, and the feeding speed can be controlled to adjust the concentration of the urea solution; urea enters the screw feeder 06 through the screw feeder 06 The high-pressure water enters the injector 7 from the injector water inlet 8, and then generates negative pressure, so that the urea and water are mixed and begin to dissolve; the mixed liquid of urea and water enters the primary dissolution tank 14 by the injector pressure, and overflows after being stirred and heated, and enters the secondary dissolution tank 15 from the bottom; after being stirred and heated in the secondary dissolution tank 15, the urea is completely dissolved, and an overflow plate 16 and an overflow plate 2 17 are arranged between the primary dissolution tank 14 and the secondary dissolution tank 15, and the overflow groove 2 on the overflow plate 16 is arranged at a low position, so as to facilitate the liquid to be transferred to the secondary dissolution tank 15, and an overflow groove 3 172 is arranged on the bottom plate 2 171 at the bottom of the overflow plate 2 17, so as to facilitate the liquid to enter the urea solution storage tank 13 through overflow for standby use.

[0039] At the same time, in order to deliver the urea in the urea storage tank 01 to the feed port of the injector 07 by the screw feeder 06, the injector 07 is driven by high-pressure water, and the urea and water are preliminarily mixed by the injector 07 and then enter the primary dissolution tank 14 and the secondary dissolution tank 15 in turn. Specifically, a water injector water inlet 8 is provided on the side wall of the injector 7, and the input end of the water injector water inlet 8 is connected to a water pipe through a flange.

[0040] Subsequently, in order to ensure the stirring effect, the first-level dissolution tank 14 and the second-level dissolution tank 15 are both equipped with an agitator 09 and a steam heater 10. Specifically, the agitator 9 includes a stirring rod 91 arranged at its output end, a combination ring 1 92 and a combination ring 2 94 sleeved on the circumferential outer wall of the stirring rod 91, the circumferential outer wall of the combination ring 1 92 is provided with a stirring blade 1 93, and the circumferential outer wall of the combination ring 2 94 is provided with a stirring blade 2 95.

[0041] Next, in order to facilitate observation of the liquid level of the urea solution storage tank 13 and facilitate discharging, specifically, a liquid level gauge 11 is provided on the front side wall of the urea solution storage tank 13, and a urea solution outlet 12 is connected to the left side wall of the urea solution storage tank 13 via a flange.

[0042] Furthermore, in order to increase the total flow of liquid movement and improve the dissolution time so that urea is fully dissolved, specifically, the overflow plate 16 includes a panel 161, the side wall of the panel 161 is reserved with an overflow groove 162, the side wall of the panel 161 is provided with a side plate 163, the top of the panel 161 is provided with a top plate 164, the bottom of the panel 161 is provided with a bottom plate 165, the side walls of the side plates 163, the top plate 164 and the bottom plate 165 are provided with a panel 2 166, and the side wall of the panel 2 166 is reserved with an overflow groove 2 167.

[0043] Finally, in order to facilitate the overflow plate 2 17 to produce a different transfer direction from the overflow plate 1 16, the overflow plate 2 17 will finally overflow the fully dissolved urea solution to the urea solution storage tank 13 for standby use. Specifically, a bottom plate 2 171 is provided at the bottom of the overflow plate 2 17, and an overflow trough 3 172 is provided at the bottom of the bottom plate 2 171.

[0044] In addition, the conventional accessories and conventional structures involved in the utility model are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the utility model does not involve improvements to internal structures and methods.

[0045] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A bulk urea storage and liquid preparation equipment, characterized in that: comprising a urea storage tank (1); in: A urea storage tank (1), wherein a urea discharge port (2) is provided on a side wall of the high-positioned urea storage tank (1), a pneumatic conveying pipeline is provided at the input end of the urea discharge port (2), and an exhaust port (3) is provided at the top of the urea storage tank (1); A discharge pipe is provided at the bottom of the urea storage tank (1), and a discharge valve (5) and dry compressed air inlets (4) are provided on the circumferential outer wall of the discharge pipe at the upper and lower sides of the discharge valve (5); A screw feeder (6) is provided at the bottom of the feed pipe, an ejector (7) is provided at the output end of the screw feeder (6), and an ejector pipe is provided at the output end of the ejector (7); The output end of the injection pipe is connected to a dissolving assembly via a flange, the dissolving assembly comprising a primary dissolving tank (14) and a secondary dissolving tank (15), an overflow plate 1 (16) is arranged between the primary dissolving tank (14) and the secondary dissolving tank (15), and an overflow plate 2 (17) is arranged on the inner wall of the secondary dissolving tank (15); The dissolving component further comprises a stirrer (9) arranged at the top thereof and a steam heater (10) arranged at the bottom thereof; A urea solution storage tank (13) is provided at the bottom output end of the second overflow plate (17).

2. The bulk urea storage and liquid preparation equipment according to claim 1, characterized in that: A water sprayer water inlet (8) is provided on the side wall of the ejector (7), and an input end of the water sprayer water inlet (8) is connected to a water pipe via a flange.

3. The bulk urea storage and liquid preparation equipment according to claim 2, characterized in that: The stirrer (9) comprises a stirring rod (91) arranged at its output end, a combination ring 1 (92) and a combination ring 2 (94) sleeved on the circumferential outer wall of the stirring rod (91), the circumferential outer wall of the combination ring 1 (92) being provided with a stirring blade 1 (93), and the circumferential outer wall of the combination ring 2 (94) being provided with a stirring blade 2 (95).

4. The bulk urea storage and liquid preparation equipment according to claim 3, characterized in that: A liquid level meter (11) is provided on the front side wall of the urea solution storage tank (13).

5. The bulk urea storage and liquid preparation equipment according to claim 4, characterized in that: The left side wall of the urea solution storage tank (13) is connected to a urea solution outlet (12) via a flange.

6. The bulk urea storage and liquid preparation equipment according to claim 5, characterized in that: The overflow plate 1 (16) comprises a panel 1 (161), the side wall of the panel 1 (161) is provided with an overflow groove 1 (162), the side wall of the panel 1 (161) is provided with a side plate (163), the top of the panel 1 (161) is provided with a top plate (164), the bottom of the panel 1 (161) is provided with a bottom plate 1 (165), the side walls of the side plate (163), the top plate (164) and the bottom plate 1 (165) are provided with a panel 2 (166), and the side wall of the panel 2 (166) is provided with an overflow groove 2 (167).

7. The bulk urea storage and liquid preparation equipment according to claim 6, characterized in that: A second bottom plate (171) is provided at the bottom of the second overflow plate (17), and a third overflow groove (172) is provided at the bottom of the second bottom plate (171).

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