An improved device for urea production
By improving the urea production equipment and designing the first and second production systems and bag filter dust collectors using existing equipment, flexible production of ordinary large-particle urea and nitrogen-potassium compound fertilizer was achieved, solving the problem of market demand adjustment and improving enterprise efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MINGSHUI CHEM FERTILIZER PLANT
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-29
AI Technical Summary
Existing urea production facilities are unable to flexibly adjust product types according to market demand, resulting in limited profit margins for enterprises. Building new differentiated production lines involves large investments and carries high risks.
Design an improved urea production device, comprising first and second production systems and a shared bag filter dust collector, to achieve flexible production of ordinary large-particle urea and nitrogen-potassium compound fertilizer by valve switching, and to optimize and improve existing equipment.
This enables flexible production of various urea products based on existing equipment, maximizing the utilization of equipment potential, reducing investment costs, and improving enterprise efficiency.
Smart Images
Figure CN224299121U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of urea production technology, and in particular to an improved urea production device. Background Technology
[0002] Currently, the market price of urea fertilizer products fluctuates significantly, putting companies in a passive position regarding urea fertilizer production. Most companies currently produce ordinary small-particle and large-particle urea, but in recent years, the price of ordinary urea has been low, resulting in limited profit margins. To achieve higher profits, companies must develop diversified urea products. Building new differentiated urea production lines involves large investments, long payback periods, and if the market is unfavorable, the production line will be idle and wasteful.
[0003] To effectively solve the above problems, this utility model provides an improved urea production device, which improves the ordinary large-particle urea production device. The improved device can produce nitrogen and potassium compound fertilizer, while maintaining the existing production capacity of large-particle urea. It can be adjusted in a timely manner according to market conditions to produce different varieties of products, maximize the potential of the device and achieve maximum benefits. Utility Model Content
[0004] The purpose of this invention is to provide an improved urea production device to solve the problems existing in the prior art.
[0005] To achieve the above objectives, this utility model provides an improved urea production device, including a first production system, a second production system, and a bag filter dust collector. The bag filter dust collector is shared by the first production system and the second production system, and the first production system and the second production system are connected by a series pipe.
[0006] Preferably, the first production system includes, in sequence, a first ordinary molten urea solution inlet pipe, a first material forming machine, a first urea outlet pipe, a first cooler, a first cooler outlet pipe, and an ordinary large particle packaging room;
[0007] The first material feeder is equipped with a first hopper;
[0008] The first ordinary molten urea solution inlet pipe is connected to the first material forming machine, the first material forming machine is connected to the first cooler through the first urea outlet pipe, and the first cooler is connected to the ordinary large particle packaging room through the first cooler outlet pipe.
[0009] Preferably, valve I is provided on the first ordinary molten urea solution inlet pipe, and a first formaldehyde inlet pipe and a first compound fertilizer slurry inlet pipe are connected to the first ordinary molten urea solution inlet pipe. The connection point of the first formaldehyde inlet pipe is located after the connection point of the first compound fertilizer slurry inlet pipe, and the connection point of the first compound fertilizer slurry inlet pipe is located after valve I. Valve III is provided on the first compound fertilizer slurry inlet pipe.
[0010] A valve V is installed on the outlet pipe of the first cooler.
[0011] Preferably, the second production system includes, in sequence, a second ordinary molten urea liquid inlet pipe, a second material forming machine, a second urea outlet pipe, a second cooler, a second cooler outlet pipe, and a nitrogen-potassium compound fertilizer packaging room;
[0012] The second material feeder is equipped with a second hopper;
[0013] The second ordinary molten urea solution inlet pipe is connected to the second material forming machine, the second material forming machine is connected to the second cooler through the second urea outlet pipe, and the second cooler is connected to the nitrogen-potassium compound fertilizer packaging room through the second cooler outlet pipe.
[0014] Preferably, valve II is provided on the second ordinary molten urea solution inlet pipe, and a second formaldehyde inlet pipe and a second compound fertilizer slurry inlet pipe are connected to the second ordinary molten urea solution inlet pipe. The connection point of the second formaldehyde inlet pipe is located after the connection point of the second compound fertilizer slurry inlet pipe, and the connection point of the second compound fertilizer slurry inlet pipe is located after valve II. Valve IV is provided on the second compound fertilizer slurry inlet pipe.
[0015] Valve VI is installed on the outlet pipe of the second cooler.
[0016] Preferably, the bag filter dust collector includes, in sequence, a dust collector, an induced draft fan inlet pipe, an induced draft fan, and an induced draft fan outlet pipe;
[0017] The dust collector is connected to the induced draft fan via the induced draft fan inlet pipe, and the induced draft fan outlet pipe is connected to the induced draft fan;
[0018] The dust collector is provided with a discharge port at the bottom, and a collection trough is provided below the discharge port.
[0019] Preferably, a first granulator dust pipe is provided on the top of the first granulator, a first cooler dust pipe is provided on the top of the first cooler, a second granulator dust pipe is provided on the top of the second granulator, and a second cooler dust pipe is provided on the top of the second cooler.
[0020] The first granulator dust pipe, the first cooler dust pipe, the second granulator dust pipe, and the second cooler dust pipe are all connected to the dust collector.
[0021] Preferably, one end of the series pipe is connected to the outlet pipe of the first cooler, and the connection point is located before the valve V;
[0022] The other end of the series pipe is connected to the outlet pipe of the second cooler, and the access point is located before the valve VI;
[0023] Valve VII is installed on the series pipe.
[0024] Therefore, the present invention, by employing the above-mentioned improved urea production apparatus, has the following beneficial effects:
[0025] (1) Optimize and improve ordinary large particle production equipment with low investment.
[0026] (2) The improved equipment can produce nitrogen and potassium compound fertilizer and maintain the existing production capacity of large granular urea. It can adjust the production of different varieties of products in a timely manner according to market conditions, so as to maximize the potential of the equipment and achieve maximum benefits.
[0027] (3) The device is easy to operate, and no additional investment in operators is required, saving labor costs.
[0028] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0029] Figure 1 This is a flowchart of an embodiment of an improved urea production apparatus according to the present invention;
[0030] Reference numerals: 1. First hopper; 2. Second hopper; 3. First granulator; 4. Second granulator; 5. First cooler; 6. Second cooler; 7. Ordinary large particle packaging room; 8. Nitrogen-potassium compound fertilizer packaging room; 9. Bag filter; 10. Exhaust fan; 11. First ordinary molten urea solution inlet pipe; 12. Second ordinary molten urea solution inlet pipe; 13. First compound fertilizer slurry inlet pipe; 14. Second compound fertilizer slurry inlet pipe; 15. First formaldehyde inlet pipe; 16. Second formaldehyde inlet pipe; 17. First urea... 18. Second urea discharge pipe; 19. First cooler outlet pipe; 20. Second cooler outlet pipe; 21. First granulator dust pipe; 22. Second granulator dust pipe; 23. First cooler dust pipe; 24. Second cooler dust pipe; 25. Exhaust fan inlet pipe; 26. Exhaust fan outlet pipe; 27. Series pipe; 28. Valve I; 29. Valve II; 30. Valve III; 31. Valve IV; 32. Valve V; 33. Valve VI; 34. Valve VII; 35. Discharge port; 36. Collection tank. Detailed Implementation
[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.
[0032] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0033] Example
[0034] Please see Figure 1 This utility model provides an improved urea production device, which includes two production lines: a first production system and a second production system.
[0035] The first production line: Ordinary small-particle urea, used as seed crystals for large-particle urea, enters the first granulator 3 through the first hopper 1. Ordinary molten urea solution enters the first granulator 3 through the first ordinary molten urea solution inlet pipe 11. In the first granulator 3, the ordinary molten urea solution and the small-particle seed crystals continuously contact and cool to crystallize, causing the granular urea to gradually grow into ordinary large-particle urea. The ordinary large-particle urea enters the first cooler 5 through the first urea outlet pipe 17 for cooling. After cooling, the ordinary large-particle urea enters the ordinary large-particle packaging room 7 through the first cooler outlet pipe 19 or enters the nitrogen-potassium compound fertilizer packaging room 8 through the series pipe 27 for packaging and sale.
[0036] The urea-containing dust-laden gas from the top of the first granulator 3 and the first cooler 5 enters the bag filter 9 for dust removal via the dust pipe 21 of the first granulator and the dust pipe 23 of the first cooler, respectively. After dust removal, the exhaust gas enters the induced draft fan 10 through the inlet pipe 25 and is then vented through the outlet pipe 26. The urea dust generated during the dust removal process is sent to the collection tank 36 through the discharge port 35 for recycling or sale at a low price.
[0037] The first compound fertilizer slurry inlet pipe 13 and the first formaldehyde inlet pipe 15 are connected to the first ordinary molten urea solution inlet pipe 11, and the connection point of the first formaldehyde inlet pipe 15 is after the connection point of the first compound fertilizer slurry inlet pipe 13. Formaldehyde is added to the ordinary molten urea solution or compound fertilizer slurry through the first formaldehyde inlet pipe 15. The addition of formaldehyde increases the hardness of the finished urea product. If ordinary large-particle urea is to be produced, the pipeline flow of the first ordinary molten urea solution inlet pipe 11 is opened to allow the ordinary molten urea solution to enter the first granulator 3; if nitrogen-potassium compound fertilizer urea is to be produced, the pipeline flow of the first compound fertilizer slurry inlet pipe 13 is opened to allow the compound fertilizer slurry to enter the second granulator 4.
[0038] The second production line: Ordinary small-particle urea, used as seed crystals for large-particle urea, enters the second granulator 4 through the second hopper 2. Ordinary molten urea solution enters the second granulator 4 through the second ordinary molten urea solution inlet pipe 12. In the second granulator 4, the ordinary molten urea solution and the small-particle seed crystals continuously contact and cool to crystallize, causing the granular urea to gradually grow into ordinary large-particle urea. The ordinary large-particle urea enters the second cooler 6 through the second urea outlet pipe 18 for cooling. After cooling, the ordinary large-particle urea enters the nitrogen-potassium compound fertilizer packaging room 8 through the second cooler outlet pipe 20, or enters the ordinary large-particle packaging room 7 through the series pipe 27 for packaging and sale.
[0039] The urea-containing dust gas from the top of the second granulator 4 and the second cooler 6 enters the bag filter 9 for dust removal through the dust pipe 22 of the second granulator and the dust pipe 24 of the second cooler, respectively. The dust removal steps are the same as those of the first system.
[0040] The second compound fertilizer slurry inlet pipe 14 and the second formaldehyde inlet pipe 16 are connected to the second ordinary molten urea solution inlet pipe 12, and the connection point of the second formaldehyde inlet pipe 16 is after the connection point of the second compound fertilizer slurry inlet pipe 14. Formaldehyde is added to the ordinary molten urea solution or compound fertilizer slurry through the second formaldehyde inlet pipe 16. The addition of formaldehyde increases the hardness of the finished urea product. If ordinary large-particle urea is being produced, the pipeline flow of the second ordinary molten urea solution inlet pipe 12 is opened to allow the ordinary molten urea solution to enter the second granulator 4; if nitrogen-potassium compound fertilizer urea is being produced, the pipeline flow of the second compound fertilizer slurry inlet pipe 14 is opened to allow the compound fertilizer slurry to enter the first granulator 3.
[0041] Furthermore, valve I 28 is installed on the first ordinary molten urea solution inlet pipe 11, valve II 29 is installed on the second ordinary molten urea solution inlet pipe 12, valve III 30 is installed on the first compound fertilizer slurry inlet pipe 13, valve IV 31 is installed on the second compound fertilizer slurry inlet pipe 14, valve V 32 is installed on the first cooler outlet pipe 19, valve VI 33 is installed on the second cooler outlet pipe 20, and valve VII 34 is installed on the series pipe 27. By switching the valves, the production of nitrogen-potassium compound fertilizer or ordinary large-particle urea can be freely switched. If the market for ordinary large-particle urea is good, valves I28, II29, V32, and VII34 need to be opened, while valves III30, IV31, and VI33 need to be closed. Ordinary molten urea solution enters the first granulator 3 and the second granulator 4 through the first ordinary molten urea solution inlet pipe 11 and the second ordinary molten urea solution inlet pipe 12. Both production lines produce ordinary large-particle urea. The product then enters the ordinary large-particle packaging room 7 for packaging and sale through the first cooler outlet pipe 19 and the series pipe 27. If the market for nitrogen-potassium compound fertilizer is good, valves I28, II29, and V32 need to be closed, while valves III30, IV31, VI33, and VII34 need to be opened. The compound fertilizer slurry enters the first granulator 3 and the second granulator 4 through the first compound fertilizer slurry inlet pipe 13 and the second compound fertilizer slurry inlet pipe 14. Both production lines produce nitrogen-potassium compound fertilizer. The product enters the nitrogen-potassium compound fertilizer packaging room 8 through the series pipe 27 and the second cooler outlet pipe 20 for packaging and sale. If there is market demand, and it is necessary to produce both ordinary granulated urea and nitrogen-potassium compound fertilizer simultaneously, then valves I28, IV31, V32, and VI3 need to be opened, and valves II29, III30, and VII34 need to be closed. Ordinary molten urea solution enters the first granulator 3 through the first ordinary molten urea solution inlet pipe 11, and the produced ordinary granulated product enters the ordinary granulated packaging room 7 through the first cooler outlet pipe 19 for packaging and sale. Compound fertilizer slurry enters the second granulator 4 through the second compound fertilizer slurry inlet pipe 14, and the produced nitrogen-potassium compound fertilizer enters the nitrogen-potassium compound fertilizer packaging room 8 through the second cooler outlet pipe 20 for packaging and sale.
[0042] Furthermore, this device is equipped with a first formaldehyde feed pipe 15 and a second formaldehyde feed pipe 16. By adding formaldehyde, the hardness of the urea product is increased, thereby improving the product quality.
[0043] Furthermore, the formaldehyde feed pipe is connected after the compound fertilizer slurry feed pipe. With this configuration, the formaldehyde feed pipe can meet the production requirements of the device, whether it is producing ordinary large-particle urea or nitrogen-potassium compound fertilizer.
[0044] Therefore, this utility model adopts the above-mentioned improved urea production device, which optimizes and improves ordinary large-particle production device with low investment; the improved device can produce nitrogen and potassium compound fertilizer and maintain the existing production capacity of large-particle urea. It can adjust the production of different varieties of products in a timely manner according to market conditions, maximize the potential of the device and achieve maximum benefits; the device is easy to operate, does not require additional investment in operators, and saves labor costs.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.
Claims
1. An improved urea production apparatus, characterized in that: It includes a first production system, a second production system, and a bag filter dust collector. The bag filter dust collector is shared by the first production system and the second production system, and the first production system and the second production system are connected by a series pipe.
2. The improved urea production apparatus according to claim 1, characterized in that: The first production system includes, in sequence, a first ordinary molten urea solution inlet pipe, a first granulator, a first urea discharge pipe, a first cooler, a first cooler outlet pipe, and an ordinary large particle packaging room; The first granulator is equipped with a first hopper; The first ordinary molten urea solution inlet pipe is connected to the first granulator, the first granulator is connected to the first cooler through the first urea outlet pipe, and the first cooler is connected to the ordinary large particle packaging room through the first cooler outlet pipe.
3. The improved urea production apparatus according to claim 2, characterized in that: A valve I is installed on the first ordinary molten urea solution inlet pipe. A first formaldehyde inlet pipe and a first compound fertilizer slurry inlet pipe are connected to the first ordinary molten urea solution inlet pipe. The connection point of the first formaldehyde inlet pipe is located after the connection point of the first compound fertilizer slurry inlet pipe. The connection point of the first compound fertilizer slurry inlet pipe is located after the valve I. A valve III is installed on the first compound fertilizer slurry inlet pipe. A valve V is installed on the outlet pipe of the first cooler.
4. The improved urea production apparatus according to claim 3, characterized in that: The second production system includes, in sequence, a second ordinary molten urea solution inlet pipe, a second granulator, a second urea outlet pipe, a second cooler, a second cooler outlet pipe, and a nitrogen-potassium compound fertilizer packaging room; The second granulator is equipped with a second hopper; The second ordinary molten urea solution inlet pipe is connected to the second granulator, the second granulator is connected to the second cooler through the second urea outlet pipe, and the second cooler is connected to the nitrogen-potassium compound fertilizer packaging room through the second cooler outlet pipe.
5. The improved urea production apparatus according to claim 4, characterized in that: A valve II is installed on the second ordinary molten urea liquid inlet pipe. A second formaldehyde inlet pipe and a second compound fertilizer slurry inlet pipe are connected to the second ordinary molten urea liquid inlet pipe. The connection point of the second formaldehyde inlet pipe is located after the connection point of the second compound fertilizer slurry inlet pipe. The connection point of the second compound fertilizer slurry inlet pipe is located after the valve II. A valve IV is installed on the second compound fertilizer slurry inlet pipe. Valve VI is installed on the outlet pipe of the second cooler.
6. The improved urea production apparatus according to claim 5, characterized in that: The bag filter dust collector includes, in sequence, a dust collector, an induced draft fan inlet pipe, an induced draft fan, and an induced draft fan outlet pipe; The dust collector is connected to the induced draft fan via the induced draft fan inlet pipe, and the induced draft fan outlet pipe is connected to the induced draft fan; The dust collector is provided with a discharge port at the bottom, and a collection trough is provided below the discharge port.
7. The improved urea production apparatus according to claim 6, characterized in that: The first granulator is provided with a first granulator dust pipe at the top, the first cooler is provided with a first cooler dust pipe at the top, the second granulator is provided with a second granulator dust pipe at the top, and the second cooler is provided with a second cooler dust pipe at the top. The first granulator dust pipe, the first cooler dust pipe, the second granulator dust pipe, and the second cooler dust pipe are all connected to the dust collector.
8. The improved urea production apparatus according to claim 7, characterized in that: One end of the series pipe is connected to the outlet pipe of the first cooler, and the access point is located before the valve V; The other end of the series pipe is connected to the outlet pipe of the second cooler, and the access point is located before the valve VI; Valve VII is installed on the series pipe.