Ammonium sulfate preparation device
By setting up a single main circulation pipeline for the mother liquor in the ammonium sulfate preparation unit and using recycled hot water as a heat source, the problems of complex layout and blockage of the ammonium sulfate mother liquor pipeline were solved, achieving efficient heat transfer and energy saving.
Patent Information
- Application Number
- CN202423074297.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-12
AI Technical Summary
In existing ammonium sulfate preparation equipment, the pipeline layout of ammonium sulfate mother liquor is complex, insufficient power leads to slow flow rate, low heat transfer efficiency, and easy pipe blockage.
A single ammonium sulfate mother liquor main circulation pipeline is adopted, with the mother liquor circulation pump set before the mother liquor heater. The recovered hot water is used as a heat source, reducing branch pipelines and using wide-channel spiral plate or shell-and-tube heat exchangers to enhance heat transfer.
Simplify pipeline layout, increase flow rate, reduce blockage, lower energy consumption, save on construction material costs, and improve heat transfer efficiency.
Smart Images
Figure CN223587111U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of ammonium sulfate preparation technology, and specifically relates to an ammonium sulfate preparation apparatus. Background Technology
[0002] In existing technologies, ammonium sulfate is typically produced using sulfuric acid and ammonia from coke oven gas. The specific preparation process involves cooling the gas from the coke oven and then feeding it into an ammonium sulfate saturator. The ammonium sulfate saturator contains ammonium sulfate mother liquor containing sulfuric acid. Simultaneously, an unsaturated ammonium sulfate mother liquor is extracted from the middle section of the ammonium sulfate saturator using a mother liquor circulation pump and then circulated back to the ammonium sulfate saturator. This allows the ammonium sulfate mother liquor to circulate between the ammonium sulfate saturator and the mother liquor circulation pump, coming into contact with the ammonia in the gas to generate ammonium sulfate.
[0003] To maintain the system's reaction temperature, heat must be introduced into the system. A common method is to draw two streams of ammonium sulfate mother liquor from the ammonium sulfate saturator. One stream is heated by a mother liquor heater and then combined with the other unheated ammonium sulfate mother liquor. Finally, the combined stream is pumped back to the ammonium sulfate saturator via a mother liquor circulation pump. The mother liquor heater is a shell-and-tube type, using steam as the heat source.
[0004] However, ammonium sulfate mother liquor is highly corrosive, and the pipes, fittings, and valves flowing through it are mostly made of stainless steel. In the aforementioned traditional technical solution, a large amount of ammonium sulfate mother liquor from the main circulation pipeline flows out of the ammonium sulfate saturator in two streams. One stream is heated by the mother liquor heater and then merges with the other stream before entering the inlet of the mother liquor circulation pump. This results in numerous control points and a complex piping layout. The power required for the flow of ammonium sulfate mother liquor within the mother liquor heater relies entirely on the suction at the pump inlet. Insufficient power leads to slow flow rates, low heat transfer efficiency, and easy blockage of the internal pipes of the mother liquor heater.
[0005] Therefore, how to overcome the above-mentioned technical defects is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0006] The purpose of this invention is to provide an ammonium sulfate preparation device that simplifies pipeline layout and avoids pipeline blockage.
[0007] To solve the above-mentioned technical problems, this utility model provides an ammonium sulfate preparation device, including an ammonium sulfate saturator, a mother liquor circulation pump, and a mother liquor heater. The ammonium sulfate saturator has a gas inlet for introducing coal gas, an ammonium sulfate mother liquor outlet for discharging unsaturated ammonium sulfate mother liquor, and an ammonium sulfate mother liquor inlet for introducing heated ammonium sulfate mother liquor. The ammonium sulfate mother liquor outlet of the ammonium sulfate saturator is connected to the refrigerant inlet of the mother liquor heater through the mother liquor circulation pump. The refrigerant outlet of the mother liquor heater is connected to the ammonium sulfate mother liquor inlet of the ammonium sulfate saturator. The heat medium channel of the mother liquor heater is used to introduce recovered hot water.
[0008] Optionally, in the above-mentioned ammonium sulfate preparation apparatus, the ammonium sulfate mother liquor outlet is located in the middle or lower part of the ammonium sulfate saturator.
[0009] Optionally, in the above-mentioned ammonium sulfate preparation apparatus, the ammonium sulfate mother liquor inlet is located at the upper part of the ammonium sulfate saturator, and a spraying device is provided at one end of the ammonium sulfate mother liquor inlet located inside the ammonium sulfate saturator.
[0010] Optionally, in the above-mentioned ammonium sulfate preparation apparatus, the mother liquor heater is a shell-and-tube heat exchanger.
[0011] Optionally, in the above-mentioned ammonium sulfate preparation apparatus, the installation height of the mother liquor heater is lower than the installation height of the ammonium sulfate saturator.
[0012] Optionally, in the above-mentioned ammonium sulfate preparation apparatus, the mother liquor heater is a wide-channel spiral plate heat exchanger.
[0013] Optionally, in the above-mentioned ammonium sulfate preparation apparatus, the direction of the ammonium sulfate mother liquor outflow from the refrigerant outlet of the mother liquor heater is consistent with the direction of the ammonium sulfate mother liquor inflow from the ammonium sulfate saturator.
[0014] Optionally, in the above-mentioned ammonium sulfate preparation apparatus, the mother liquor heater is arranged above the mother liquor circulation pump via a support mechanism.
[0015] Optionally, the above-mentioned ammonium sulfate preparation apparatus further includes a condensate recovery tank, which is used to recover and store steam condensate, and the outlet of the condensate recovery tank is connected to the heat medium inlet of the mother liquor heater.
[0016] Optionally, in the above-mentioned ammonium sulfate preparation apparatus, a hot water pump is connected between the outlet of the condensate recovery tank and the heat medium inlet of the mother liquor heater.
[0017] This invention provides an ammonium sulfate preparation apparatus, the advantages of which are:
[0018] Only one main circulation pipeline for ammonium sulfate mother liquor is installed. Unsaturated ammonium sulfate mother liquor, drawn from the ammonium sulfate saturator, first enters the mother liquor circulation pump to increase the flow rate, then is heated by the mother liquor heater before returning to the ammonium sulfate saturator. This design significantly reduces the use of large-diameter pipes, fittings, and valves by placing the mother liquor heater on the pipeline between the outlet of the mother liquor circulation pump and the ammonium sulfate saturator, and by connecting only the mother liquor circulation pump and the mother liquor heater in series on the main circulation pipeline, without branch lines before the mother liquor circulation pump. This reduces friction loss, lowers energy consumption, and saves on construction material costs. The high flow velocity of the ammonium sulfate mother liquor at the outlet of the mother liquor circulation pump enhances the heat transfer effect of the mother liquor heater while reducing pipeline blockage. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of an ammonium sulfate preparation apparatus provided in an embodiment of the present invention;
[0021] Figure 2 This is a schematic diagram of the main equipment of an ammonium sulfate preparation apparatus provided in a specific embodiment of the present invention;
[0022] Figure 3 A schematic diagram of the main equipment of the ammonium sulfate preparation apparatus provided in another specific embodiment of this utility model;
[0023] Figure 4 This is a schematic diagram of the structure of the ammonium sulfate saturator provided in an embodiment of the present invention;
[0024] Figure 5 A simplified diagram illustrating the use of a shell-and-tube heat exchanger in the mother liquor heater provided for this embodiment of the utility model;
[0025] Figure 6 A simplified diagram of a mother liquor heater using a wide-channel spiral plate heat exchanger, provided for an embodiment of this utility model.
[0026] In the image above:
[0027] 1-Ammonium sulfate saturator; 2-Mother liquor circulation pump; 3-Mother liquor heater; 4-Hot water pump; 5-Condensate recovery tank;
[0028] A - Coal gas; B - Ammonium sulfate mother liquor; C - Recovered hot water;
[0029] a - Heat medium inlet of the mother liquor heater; b - Heat medium outlet of the mother liquor heater. Detailed Implementation
[0030] 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.
[0031] The core of this invention is to provide an ammonium sulfate preparation device that simplifies pipeline layout and avoids pipeline blockage.
[0032] To enable those skilled in the art to better understand the technical solutions provided by this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0033] For details, please refer to Figures 1-6 The present invention provides an ammonium sulfate preparation device, comprising an ammonium sulfate saturator 1, a mother liquor circulation pump 2, and a mother liquor heater 3.
[0034] The ammonium sulfate saturator 1 stores ammonium sulfate mother liquor inside. When the ammonium sulfate mother liquor comes into contact with ammonia in the coal gas, it can generate ammonium sulfate. The ammonium sulfate saturator 1 has a coal gas inlet for introducing coal gas A, an ammonium sulfate mother liquor outlet for discharging unsaturated ammonium sulfate mother liquor B, and an ammonium sulfate mother liquor inlet for introducing heated ammonium sulfate mother liquor B.
[0035] The ammonium sulfate mother liquor outlet of ammonium sulfate saturator 1 is connected to the refrigerant inlet of mother liquor heater 3 through mother liquor circulation pump 2. Mother liquor circulation pump 2 can extract unsaturated ammonium sulfate mother liquor from ammonium sulfate saturator 1 and then pressurize it to send it to mother liquor heater 3.
[0036] The mother liquor heater 3 is a heat exchange device with a refrigerant channel and a heat medium channel. The refrigerant inlet of the mother liquor heater 3 is connected to the ammonium sulfate mother liquor outlet of the ammonium sulfate saturator 1 through the mother liquor circulation pump 2. The refrigerant outlet of the mother liquor heater 3 is connected to the ammonium sulfate mother liquor inlet of the ammonium sulfate saturator 1. The heat medium channel of the mother liquor heater 3 is used to introduce the recovered hot water C.
[0037] It should be noted that if the mother liquor circulation pump 2 is located at the refrigerant outlet of the mother liquor heater 3, the power required for the flow of ammonium sulfate mother liquor within the mother liquor heater 3 relies entirely on the suction force at the inlet of the mother liquor circulation pump 2. This results in insufficient flow power of the ammonium sulfate mother liquor, leading to a slow flow rate, low heat transfer efficiency, and easy blockage of the internal pipes of the mother liquor heater 3. Based on the above findings, this invention places the mother liquor circulation pump 2 in front of the refrigerant inlet of the mother liquor heater 3 to overcome the aforementioned defects.
[0038] The ammonium sulfate preparation apparatus provided by this utility model has only one main circulation pipeline for ammonium sulfate mother liquor. Unsaturated ammonium sulfate mother liquor B is drawn from the ammonium sulfate saturator 1, first enters the mother liquor circulation pump 2 to increase the flow rate, then is heated by the mother liquor heater 3, and finally returns to the ammonium sulfate saturator 1. By placing the mother liquor heater 3 on the pipeline between the outlet of the mother liquor circulation pump 2 and the ammonium sulfate saturator 1, and by connecting only the mother liquor circulation pump 2 and the mother liquor heater 3 in series on the main circulation pipeline for the ammonium sulfate mother liquor, without branch pipelines before the mother liquor circulation pump 2, the use of large-diameter pipes, fittings, and valves is significantly reduced. This reduces friction loss, lowers energy consumption, and saves on construction material costs. The high flow rate of ammonium sulfate mother liquor B at the outlet of the mother liquor circulation pump 2 enhances the heat transfer effect of the mother liquor heater 3 and reduces pipeline blockage.
[0039] In a specific embodiment, the ammonium sulfate mother liquor outlet is located in the middle or lower part of the ammonium sulfate saturator 1, so as to better utilize the mother liquor circulation pump 2 to extract the ammonium sulfate mother liquor B.
[0040] The ammonium sulfate mother liquor inlet is located at the top of the ammonium sulfate saturator 1. A spraying device is installed at one end of the ammonium sulfate mother liquor inlet inside the ammonium sulfate saturator 1. The ammonium sulfate mother liquor B is sprayed through the spray head to increase the spraying area, so that the ammonium sulfate mother liquor B can fully contact the coal gas A.
[0041] In one specific embodiment, such as Figure 2 and Figure 3 As shown, the mother liquor heater 3 is a wide-channel spiral plate heat exchanger, or a shell-and-tube heat exchanger.
[0042] like Figure 2 and Figure 6 As shown, when the mother liquor heater 3 is a wide-channel spiral plate heat exchanger, the outflow direction of the ammonium sulfate mother liquor from the refrigerant outlet of the mother liquor heater 3 is consistent with the inflow direction of the ammonium sulfate mother liquor from the ammonium sulfate saturator 1. That is, during installation, the installation height of the mother liquor heater 3 can be kept consistent with the installation height of the ammonium sulfate saturator 1. The heat medium inlet a and heat medium outlet b of the mother liquor heater are respectively located on the side of the mother liquor heater 3 away from the ammonium sulfate saturator 1 and at the top. The refrigerant inlet and refrigerant outlet of the mother liquor heater are respectively located at the bottom of the mother liquor heater 3 and on the side closer to the ammonium sulfate saturator 1.
[0043] like Figure 3 and Figure 5 As shown, when the mother liquor heater 3 is a shell-and-tube heat exchanger, its installation height can be set lower than that of the ammonium sulfate saturator 1. The heat medium inlet a and outlet b of the mother liquor heater can be located on the side of the mother liquor heater 3. The refrigerant inlet and outlet of the mother liquor heater are located at the bottom and top of the mother liquor heater 3, respectively.
[0044] Compared with the wide-channel spiral plate heat exchanger, the installation height of the mother liquor heater 3 needs to be adjusted so that the outflow direction of the heated mother liquor is consistent with the inlet direction of the ammonium sulfate mother liquor of the ammonium sulfate saturator 1.
[0045] Compared to existing mother liquor heaters that use saturated steam as a heat source, this method consumes a large amount of steam. In traditional processes, conventional processes such as ammonium sulfate drying consume steam, generating a large amount of steam condensate, the low-grade heat of which cannot be utilized.
[0046] Based on the above reasons, the researchers thought of using the recycled hot water C as the heat medium / heat source of the mother liquor heater 3 to heat the refrigerant of the ammonium sulfate mother liquor B.
[0047] This solution also includes a condensate recovery tank 5, which is used to recover and store steam condensate. The outlet of the condensate recovery tank 5 is connected to the heat medium inlet of the mother liquor heater 3.
[0048] When conventional processes such as ammonium sulfate drying consume steam and generate a large amount of steam condensate, it can be collected in the condensate recovery tank 5 and used as a heat source for the mother liquor heater 3.
[0049] To further improve the circulation effect, a hot water pump 4 is connected between the outlet of the condensate recovery tank 5 and the heat medium inlet of the mother liquor heater 3. After collecting steam condensate, the condensate recovery tank 5 is circulated into the mother liquor heater 3 by the hot water pump 4 to heat the ammonium sulfate mother liquor B.
[0050] like Figure 1 The flow process of ammonium sulfate mother liquor B in the ammonium sulfate preparation apparatus shown is as follows:
[0051] Step 1: The ammonium sulfate mother liquor B containing sulfuric acid enters the ammonium sulfate saturator 1, where it comes into contact with ammonia in the coal gas to generate ammonium sulfate;
[0052] Step 2: Unsaturated ammonium sulfate mother liquor B is drawn out from the middle section of ammonium sulfate saturator 1 and transported from bottom to top to mother liquor heater 3 by circulating pump 2;
[0053] Step 3: The heated ammonium sulfate mother liquor B is returned to the upper section of ammonium sulfate saturator 1 to continue contacting with ammonia in the coal gas to generate ammonium sulfate;
[0054] Step 4: Conventional processes such as ammonium sulfate drying consume steam and generate a large amount of steam condensate, which is the recovered hot water C. After collection, it is stored in the condensate recovery tank 5.
[0055] Step 5: Use hot water pump 4 to transport the hot water C in the condensate recovery tank 5 to the mother liquor heater 3 as a heat source. A large amount of the returned water is returned to the condensate recovery tank 5, and a small amount is sent out of the boundary area.
[0056] In summary, the ammonium sulfate preparation apparatus provided by this utility model protects the mother liquor heating process and equipment layout in the production process of producing ammonium sulfate using sulfuric acid and ammonia in coke oven gas.
[0057] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.
[0058] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.
[0059] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0061] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. An ammonium sulfate preparation apparatus, characterized in that, The system includes an ammonium sulfate saturator (1), a mother liquor circulation pump (2), and a mother liquor heater (3). The ammonium sulfate saturator (1) has a gas inlet for introducing coal gas (A), an ammonium sulfate mother liquor outlet for discharging unsaturated ammonium sulfate mother liquor (B), and an ammonium sulfate mother liquor inlet for introducing heated ammonium sulfate mother liquor (B). The ammonium sulfate mother liquor outlet of the ammonium sulfate saturator (1) is connected to the refrigerant inlet of the mother liquor heater (3) through the mother liquor circulation pump (2). The refrigerant outlet of the mother liquor heater (3) is connected to the ammonium sulfate mother liquor inlet of the ammonium sulfate saturator (1). The heat medium channel of the mother liquor heater (3) is used to introduce recycled hot water (C).
2. The ammonium sulfate preparation apparatus according to claim 1, characterized in that, The ammonium sulfate mother liquor outlet is located in the middle or lower part of the ammonium sulfate saturator (1).
3. The ammonium sulfate preparation apparatus according to claim 1, characterized in that, The ammonium sulfate mother liquor inlet is located at the upper part of the ammonium sulfate saturator (1), and a spraying device is provided at one end of the ammonium sulfate mother liquor inlet inside the ammonium sulfate saturator (1).
4. The ammonium sulfate preparation apparatus according to claim 1, characterized in that, The mother liquor heater (3) is a shell-and-tube heat exchanger.
5. The ammonium sulfate preparation apparatus according to claim 4, characterized in that, The installation height of the mother liquor heater (3) is lower than the installation height of the ammonium sulfate saturator (1).
6. The ammonium sulfate preparation apparatus according to claim 1, characterized in that, The mother liquor heater (3) is a wide-channel spiral plate heat exchanger.
7. The ammonium sulfate preparation apparatus according to claim 6, characterized in that, The direction of ammonium sulfate mother liquor outflow from the refrigerant outlet of the mother liquor heater (3) is consistent with the direction of ammonium sulfate mother liquor inflow from the ammonium sulfate saturator (1).
8. The ammonium sulfate preparation apparatus according to claim 1, characterized in that, The mother liquor heater (3) is suspended above the mother liquor circulation pump (2) by a support mechanism.
9. The ammonium sulfate preparation apparatus according to any one of claims 1-8, characterized in that, It also includes a condensate recovery tank (5), which is used to recover and store steam condensate. The outlet of the condensate recovery tank (5) is connected to the heat medium inlet of the mother liquor heater (3).
10. The ammonium sulfate preparation apparatus according to claim 9, characterized in that, A hot water pump (4) is connected between the outlet of the condensate recovery tank (5) and the heat medium inlet of the mother liquor heater (3).