Potassium sulfate fertilizer production line
By using materials such as quartz tubes and polypropylene waterproof cloth in the potassium sulfate fertilizer production line, the corrosion problem was solved, the equipment life was extended, the maintenance workload and cost were reduced, and the production efficiency was improved.
Patent Information
- Application Number
- CN202423179655.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Parts in potassium sulfate fertilizer production lines are susceptible to corrosion from acidic liquids and gases, resulting in short service life. This leads to frequent replacements of the sulfuric acid pipes and acid gas scrubbing tower mounting brackets, increasing workload and costs.
Quartz tubes were used instead of iron pipes as the lower sulfuric acid pipes, and polypropylene waterproof cloth was attached to the mounting frame of the acid gas scrubbing tower. The outer wall of the reactor was constructed by combining high-temperature refractory bricks and heat-insulating bricks. Graphite coolers and falling film absorption towers were used to treat the waste gas, thus optimizing the production line structure.
It extends the service life of the lower sulfuric acid pipe to more than one year, reduces the frequency of painting and replacement, lowers maintenance costs, and improves the operating efficiency and safety of the production line.
Smart Images
Figure CN223615895U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sulfuric acid preparation facilities, and in particular to a potassium sulfate fertilizer production line. Background Technology
[0002] Potassium sulfate is a commonly used fertilizer in agriculture. As an acidic fertilizer, it reacts with water or soil to produce an acidic solution, thus affecting soil pH and increasing soil acidity. It is suitable for crops that require an acidic environment. However, during the production of potassium sulfate fertilizer, parts are easily corroded by acidic liquids and gases, reducing their lifespan and requiring frequent replacement. For example, the lower sulfuric acid pipe in the reactor is subject to prolonged sulfuric acid corrosion, resulting in a shorter lifespan and requiring replacement approximately every 20 days. Furthermore, the mounting bracket of the acid gas scrubbing tower, which treats acidic waste gases, is also more prone to corrosion and rust, requiring frequent painting. This results in a significant workload and high cost associated with replacing the lower sulfuric acid pipe and painting the mounting bracket. Utility Model Content
[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a potassium sulfate fertilizer production line that can reduce the frequency of painting and replacing the lower sulfuric acid pipe, thereby reducing workload and saving costs.
[0004] The technical solution adopted by this utility model to solve its technical problem is:
[0005] A potassium sulfate fertilizer production line, including
[0006] Reactor;
[0007] The feeding device includes a feed pipe and a sulfuric acid pipe installed at the top of the reactor. The feed pipe is used to add potassium chloride raw material, and the sulfuric acid pipe is used to add sulfuric acid. The sulfuric acid pipe is made of quartz tube.
[0008] The waste gas treatment device includes an outlet pipe disposed on the side of the reactor, an acid gas scrubbing tower connected to the outlet pipe, and a mounting frame for fixing the acid gas scrubbing tower, the mounting frame being covered with a waterproof cloth.
[0009] A discharge device is located below the reactor and is used to transport potassium sulfate fertilizer from the reactor.
[0010] According to an embodiment of this utility model, a potassium sulfate fertilizer production line has at least the following beneficial effects: During production, the feeding device adds potassium chloride raw material and sulfuric acid to the reactor through the feed pipe and the sulfuric acid pipe, respectively, and the reaction in the reactor produces potassium sulfate fertilizer. The waste gas device treats the hydrogen chloride gas generated in the reactor through an acid gas scrubbing tower, and the discharge device is used to transport the potassium sulfate fertilizer from the reactor. Because the material of the sulfuric acid pipe in the reactor is changed from iron to quartz, quartz is less prone to corrosion, increasing its service life from 20 days to more than one year. The mounting frame of the acid gas scrubbing tower is covered with waterproof cloth, thus preventing rusting without painting. Therefore, the frequency of painting the production line and replacing the sulfuric acid pipe can be reduced, reducing workload and saving costs.
[0011] According to some embodiments of this utility model, the waterproof fabric is a polypropylene waterproof fabric.
[0012] The advantage is that polypropylene waterproof fabric has excellent resistance to chemical corrosion, including sulfuric acid, thus ensuring long-term use after application.
[0013] According to some embodiments of this utility model, a high-level sulfuric acid tank is provided above the lower sulfuric acid pipe, and the upper end of the lower sulfuric acid pipe is connected to the high-level sulfuric acid tank.
[0014] The advantages are that the primary function of the elevated sulfuric acid tank is to store and transport sulfuric acid, ensuring the safe operation of the system. It uses a sulfuric acid booster pump to draw sulfuric acid from the storage tank into the elevated tank, and then the sulfuric acid flows into the reactor by gravity through a lower sulfuric acid pipe. The elevated tank's design allows the sulfuric acid level to be observed through a transparent level gauge; once the level reaches the set position, the sulfuric acid booster pump automatically shuts off. Furthermore, the elevated tank is equipped with an overflow port; when the level exceeds the set position, excess sulfuric acid can flow back into the storage tank through the overflow port, thus preventing spillage and ensuring safety.
[0015] According to some embodiments of the present invention, the reactor includes a combustion chamber and a reaction chamber located below the combustion chamber. Burners are provided on both sides of the combustion chamber. A stirrer is provided in the reaction chamber. The feed pipe and the sulfuric acid feed pipe are connected to the reaction chamber. The reaction chamber is provided with a discharge port. The discharge device is connected to the discharge port.
[0016] The advantages are: sulfuric acid and potassium chloride raw materials are evenly added to the reaction chamber through the sulfuric acid pipe and the feed pipe, respectively. The combustion chamber provides a large amount of heat energy for the materials reacting in the reaction chamber. Under the continuous stirring of the stirrer, the reactants sulfuric acid and potassium chloride absorb a large amount of heat and then produce potassium sulfate and hydrogen chloride gas.
[0017] According to some embodiments of the present invention, the outer wall of the reactor is constructed of high-temperature refractory bricks and insulating bricks, and is laid with water glass and acid-resistant mortar.
[0018] The advantage is that this design provides excellent sealing and insulation, preventing sulfuric acid leakage from corroding the machine.
[0019] According to some embodiments of the present invention, the top of the reactor is provided with asbestos.
[0020] The advantage is that the asbestos at the top can act as insulation, preventing heat from escaping from the top of the reactor.
[0021] According to some embodiments of the present invention, the discharge port is located on both sides of the reaction chamber, and the stirrer is horizontally arranged towards the discharge ports on both sides.
[0022] The advantage is that the potassium sulfate produced in this reaction chamber is pushed out to the discharge ports on both sides by the agitator, which is beneficial for the discharge.
[0023] According to some embodiments of the present invention, the discharge device includes a screw conveyor connected to the discharge port and a scraper conveyor located below the screw conveyor.
[0024] The advantage is that the screw conveyor and scraper conveyor play a role in transporting potassium sulfate fertilizer, ensuring that the reaction in the reaction chamber continues.
[0025] According to some embodiments of this utility model, the exhaust pipe is equipped with a graphite cooler.
[0026] The advantages are: a graphite cooler is a heat exchange device made of graphite material. Under extreme conditions such as high temperature, corrosion, and high pressure, the graphite cooler exhibits excellent performance, making it suitable for cooling acidic gases and beneficial for subsequent treatment in acid gas scrubbing towers.
[0027] According to some embodiments of the present invention, the waste gas treatment device further includes a falling film absorption tower, which is connected to the acid gas scrubbing tower.
[0028] The advantage is that falling film absorption towers are a commonly used gas absorption device. Their working principle is based on the interaction between gas and solution. Through contact and mass transfer processes on the packing layer, the content of pollutants in the gas is reduced. Therefore, the gas treated by acid gas scrubbing towers can be purified to meet emission standards.
[0029] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a schematic diagram of an embodiment of the present utility model;
[0032] Figure 2 for Figure 1 Internal schematic diagram of the intermediate reactor;
[0033] Figure 3 for Figure 1 A schematic diagram of the mounting bracket.
[0034] Reference numerals: Reactor 100, Feed pipe 110, Sulfuric acid feed pipe 120, Gas outlet pipe 130, Acid gas scrubbing tower 140, Mounting frame 150, Waterproof cloth 160, High-level sulfuric acid tank 170, Combustion chamber 180, Reaction chamber 190, Burner 200, Agitator 210, Discharge port 220, Asbestos 230, Screw conveyor 240, Scraper conveyor 250, Graphite cooler 260, Falling film absorption tower 270. Detailed Implementation
[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0036] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0037] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.
[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0039] The following is for reference. Figures 1-3 A potassium sulfate fertilizer production line is described in detail with reference to a specific embodiment. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.
[0040] like Figures 1-3 As shown, a potassium sulfate fertilizer production line includes a reactor 100, a feeding device, a waste gas treatment device, and a discharging device.
[0041] The feeding device includes a feed pipe 110 and a sulfuric acid pipe 120 located at the top of the reactor 100. The feed pipe 110 is used to add potassium chloride raw material, and the sulfuric acid pipe 120 is used to add sulfuric acid. The sulfuric acid pipe 120 is made of quartz tube. The waste gas treatment device includes an outlet pipe 130 located on the side of the reactor 100, an acid gas scrubbing tower 140 connected to the outlet pipe 130, and a mounting frame 150 for fixing the acid gas scrubbing tower 140. The mounting frame 150 is covered with a waterproof cloth 160. The discharge device is located below the reactor 100 and is used to transport potassium sulfate fertilizer from the reactor 100. It should be noted that the reactor 100, the feeding device, and the waste gas treatment device should also be installed on infrastructure or supports (not shown in the figure). During reactor production, the feeding device adds potassium chloride and sulfuric acid to reactor 100 through feed pipe 110 and sulfuric acid pipe 120, respectively. The reaction in reactor 100 produces potassium sulfate fertilizer. The waste gas treatment device uses acid gas scrubbing tower 140 to treat the hydrogen chloride gas generated in reactor 100. The discharge device transports the potassium sulfate fertilizer from reactor 100. Because the material of the sulfuric acid pipe 120 in reactor 100 has been changed from iron to quartz, which is less prone to corrosion, its service life has increased from 20 days to over one year. The mounting bracket 150 of the acid gas scrubbing tower 140 is covered with waterproof cloth 160, eliminating the need for painting and preventing rust. Therefore, the frequency of painting and replacing the sulfuric acid pipe 120 on the production line is reduced, decreasing workload and saving costs.
[0042] like Figure 3 As shown, the waterproof fabric 160 is made of polypropylene. Polypropylene waterproof fabric 160 has excellent resistance to chemical corrosion, including sulfuric acid, thus ensuring long-term use after application.
[0043] like Figure 1 and Figure 2 As shown, a high-level sulfuric acid tank 170 is located above the lower sulfuric acid pipe 120, and the upper end of the lower sulfuric acid pipe 120 is connected to the high-level sulfuric acid tank 170. The main function of the high-level sulfuric acid tank 170 is to store and transport sulfuric acid, ensuring the safe operation of the system. It uses a sulfuric acid booster pump to draw sulfuric acid from the storage tank into the high-level tank, and then the sulfuric acid flows into the reactor 100 by gravity through the lower sulfuric acid pipe 120. The design of the high-level tank allows the sulfuric acid level to be observed through a transparent level gauge. Once the level reaches the set position, the sulfuric acid booster pump automatically shuts off. In addition, the high-level tank is equipped with an overflow port. When the level exceeds the set position, excess sulfuric acid can flow back into the storage tank through the overflow port, thereby preventing overflow and ensuring safety. Furthermore, the reactor 100 includes a combustion chamber 180 and a reaction chamber 190 located below the combustion chamber 180. Burners 200 are installed on both sides of the combustion chamber 180, and an agitator 210 is installed inside the reaction chamber 190. A feed pipe 110 and a sulfuric acid feed pipe 120 enter the reaction chamber 190, and the reaction chamber 190 has a discharge port 220, which is connected to a discharge device. Sulfuric acid and potassium chloride raw materials are uniformly added to the reaction chamber 190 through the sulfuric acid feed pipe 120 and the feed pipe 110, respectively. The combustion chamber 180 provides a large amount of heat energy for the materials reacting in the reaction chamber 190. Under the continuous stirring of the agitator 210, the reactants sulfuric acid and potassium chloride absorb a large amount of heat to produce potassium sulfate and hydrogen chloride gas. Moreover, the outer wall of the reactor 100 is constructed of high-temperature refractory bricks and insulating bricks (not shown in the figure) and is reinforced with water glass and acid-resistant mortar. This design provides excellent sealing and insulation, preventing sulfuric acid leakage from corroding the machine. Furthermore, asbestos 230 is installed on the top of the reactor 100. The asbestos 230 at the top provides insulation, preventing heat loss from the top of the reactor 100.
[0044] In some specific embodiments of this utility model, such as Figure 2 As shown, the discharge ports 220 are located on both sides of the reaction chamber 190, and the stirrer 210 is horizontally positioned towards the discharge ports 220 on both sides. In this way, the potassium sulfate produced in the reaction chamber 190 is pushed out towards the discharge ports 220 on both sides by the stirrer 210, thus facilitating discharge. Figure 1 As shown, the discharge device includes a screw conveyor 240 connected to the discharge port 220 and a scraper conveyor 250 located below the screw conveyor 240. The screw conveyor 240 and the scraper conveyor 250 serve to transport potassium sulfate fertilizer, ensuring that the reaction in the reaction chamber 190 continues.
[0045] It should be noted that, as Figure 1As shown, the outlet pipe 130 is equipped with a graphite cooler 260. The graphite cooler 260 is a heat exchange device made of graphite material. Under extreme conditions such as high temperature, corrosion, and high pressure, the graphite cooler 260 exhibits excellent performance, and is therefore suitable for cooling acidic gases, which is beneficial for subsequent treatment in the acid gas scrubbing tower 140.
[0046] It is worth mentioning that, such as Figure 1 As shown, the waste gas treatment device also includes a falling film absorption tower 270, which is connected to the acid gas scrubbing tower 140. The falling film absorption tower 270 is a commonly used gas absorption device. Its working principle is based on the interaction between gas and solution. Through contact and mass transfer processes on the packing layer, it reduces the pollutant content in the gas, thus purifying the gas treated by the acid gas scrubbing tower 140 to meet emission standards. To achieve better treatment results, multiple acid gas scrubbing towers 140 and falling film absorption towers 270 can be installed.
[0047] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0048] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A potassium sulfate fertilizer production line, characterized in that, include: Reactor (100); The feeding device includes a feed pipe (110) and a sulfuric acid pipe (120) disposed on the top of the reactor (100). The feed pipe (110) is used to add potassium chloride raw material, and the sulfuric acid pipe (120) is used to add sulfuric acid. The sulfuric acid pipe (120) is made of quartz tube. The waste gas treatment device includes an outlet pipe (130) disposed on the side of the reactor (100), an acid gas scrubbing tower (140) connected to the outlet pipe (130), and a mounting frame (150) for fixing the acid gas scrubbing tower (140), the mounting frame (150) being covered with a waterproof cloth (160). A discharge device is located below the reactor (100) for conveying potassium sulfate fertilizer from the reactor (100).
2. The potassium sulfate fertilizer production line according to claim 1, characterized in that, The waterproof fabric (160) is a polypropylene waterproof fabric (160).
3. A potassium sulfate fertilizer production line according to claim 1, characterized in that, A high-level sulfuric acid tank (170) is provided above the lower sulfuric acid pipe (120), and the upper end of the lower sulfuric acid pipe (120) is connected to the high-level sulfuric acid tank (170).
4. A potassium sulfate fertilizer production line according to claim 1, characterized in that, The reactor (100) includes a combustion chamber (180) and a reaction chamber (190) located below the combustion chamber (180). Burners (200) are provided on both sides of the combustion chamber (180). A stirrer (210) is provided inside the reaction chamber (190). The feed pipe (110) and the sulfuric acid pipe (120) are connected to the reaction chamber (190). The reaction chamber (190) is provided with a discharge port (220). The discharge device is connected to the discharge port (220).
5. A potassium sulfate fertilizer production line according to claim 4, characterized in that, The outer wall of the reactor (100) is constructed of high-temperature refractory bricks and insulating bricks, and is made of water glass and acid-resistant mortar.
6. A potassium sulfate fertilizer production line according to claim 5, characterized in that, The top of the reactor (100) is provided with asbestos (230).
7. A potassium sulfate fertilizer production line according to claim 4, characterized in that, The discharge port (220) is located on both sides of the reaction chamber (190), and the stirrer (210) is horizontally arranged towards the discharge ports (220) on both sides.
8. A potassium sulfate fertilizer production line according to claim 7, characterized in that, The discharge device includes a screw conveyor (240) connected to the discharge port (220) and a scraper conveyor (250) located below the screw conveyor (240).
9. A potassium sulfate fertilizer production line according to claim 1, characterized in that, The exhaust pipe (130) is equipped with a graphite cooler (260).
10. A potassium sulfate fertilizer production line according to claim 1, characterized in that, The waste gas treatment device also includes a falling film absorption tower (270), which is connected to the acid gas scrubbing tower (140).