Device for preparing ammonia water by diluting liquid ammonia on line

Abstract

The utility model discloses a device for preparing ammonia water by diluting liquid ammonia on line, which comprises a liquid ammonia pressure stabilizing and adjusting module connected with a liquid ammonia pipe network and used for receiving liquid ammonia of the liquid ammonia pipe network; the demineralized water adjusting module is connected with the demineralized water pipe network and is used for receiving demineralized water of the demineralized water pipe network; the liquid ammonia primary absorber is connected with the outlets of the liquid ammonia pressure stabilizing and regulating module and the demineralized water regulating module and is used for receiving liquid ammonia and demineralized water; the liquid ammonia secondary absorber module is used for receiving a mixed medium at an outlet of the liquid ammonia primary absorber; the ammonia water storage tank module is connected with an outlet of the liquid ammonia secondary absorber module and an inlet of the dilution water jet pump; the ammonia gas absorber is used for receiving and storing supplemented water of the demineralized water pipe network and is used for absorbing ammonia gas discharged by an exhaust pipeline of the ammonia water storage tank; an inlet of the dosing skid is connected with a solution outlet of the ammonia water storage tank module. Efficient online dilution of liquid ammonia and preparation of ammonia water are achieved, the process is simple and easy to operate, the dosing process is continuous and reliable, the liquid ammonia dilution process is safe, and the risk of ammonia gas leakage is small.

Description

Technical Field

[0001] This utility model belongs to the fields of ammonia preparation technology and water treatment technology, and specifically relates to an online liquid ammonia dilution and preparation device for ammonia water. Background Technology

[0002] Ammonia water preparation and water treatment are widely used in petroleum, chemical, and environmental protection fields. Ammonia water is conventionally used as an industrial product in industrial water treatment, domestic water treatment, and other production processes. It is mainly used to adjust the pH value of aqueous solutions based on the alkaline properties of ammonia water to meet the water quality standards required for industrial production.

[0003] Conventional ammonia dosing uses finished ammonia solution or prepares ammonia solution from liquid ammonia. Considering the transportation and storage issues of liquid ammonia or high-concentration ammonia solution, many chemical production enterprises now directly use the liquid ammonia produced in their products to prepare a small amount of ammonia solution for production use. However, the preparation of ammonia solution often involves mixing liquid ammonia directly in a water tank, which has problems such as violent solution dilution, easy ammonia gas leakage, poor dilution effect of liquid ammonia, and large fluctuations in water quality after dosing, thus affecting the production process. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems by providing an online liquid ammonia dilution and ammonia water preparation device, which solves the technical problems of violent solution dilution, easy ammonia leakage, and poor liquid ammonia dilution effect in the existing production process.

[0005] To achieve the above objectives, this utility model provides an online liquid ammonia dilution and ammonia water preparation device, including a liquid ammonia pressure stabilization and regulation module connected to a liquid ammonia pipeline network for receiving liquid ammonia from the liquid ammonia pipeline network;

[0006] The demineralized water regulating module is connected to the demineralized water pipeline network and is used to receive demineralized water from the demineralized water pipeline network;

[0007] The liquid ammonia primary absorber is connected to the outlet of the liquid ammonia pressure stabilization and regulation module and the demineralized water regulation module, and is used to receive liquid ammonia and demineralized water.

[0008] The liquid ammonia secondary absorber module is connected to the outlet of the liquid ammonia primary absorber and is used to receive the mixed medium from the outlet of the liquid ammonia primary absorber.

[0009] The dilution water jet pump is used to draw and pressurize the solution in the ammonia storage tank module;

[0010] The ammonia storage tank module is connected to the outlet of the liquid ammonia secondary absorber module and the inlet of the dilution water jet pump.

[0011] The ammonia absorber receives makeup water from the demineralized water storage network and is used to absorb ammonia gas discharged from the exhaust pipe of the ammonia storage tank.

[0012] The dosing skid has its inlet connected to the ammonia storage tank module solution outlet, and its outlet connected to the dosing point.

[0013] Furthermore, the liquid ammonia pressure stabilization and regulation module includes a first pipeline, on which a first pressure reducing valve, a first pressure gauge, a first ball valve, a first regulating valve, a second ball valve, and a first check valve are sequentially installed along the material flow direction. The first pipeline is connected between the liquid ammonia pipeline network and the inlet of the liquid ammonia primary absorber.

[0014] Furthermore, the demineralized water regulating module includes a second pipeline, on which a third ball valve, a second regulating valve, a fourth ball valve, and a second check valve are sequentially installed along the flow direction of the demineralized water. The second pipeline is connected between the demineralized water pipeline network and the inlet of the liquid ammonia primary absorber.

[0015] Furthermore, the liquid ammonia secondary absorber module includes at least two sets of liquid ammonia secondary absorbers. The ammonia inlet of each set of liquid ammonia secondary absorbers is connected to the outlet of the liquid ammonia primary absorber via a third pipeline, and a fifth ball valve is installed on the third pipeline. The dilution water inlet of each set of liquid ammonia secondary absorbers is connected to the outlet of the dilution water jet pump via a fourth pipeline, and a fourth check valve, a thirteenth ball valve, and a sixth ball valve are installed sequentially along the direction of medium flow on the fourth pipeline.

[0016] Furthermore, the ammonia storage tank module includes multiple ammonia storage tanks, the number of which is the same as the number of liquid ammonia secondary absorbers and they are arranged in a one-to-one correspondence and connected manner; the first outlet of each ammonia storage tank is connected to the inlet of the dilution water jet pump through a fifth pipeline, and a seventh ball valve, an eighth ball valve, and a first filter are installed sequentially along the medium flow direction on the fifth pipeline; the water inlet of each ammonia storage tank is connected to the demineralized water network through a sixth pipeline, and a pneumatic water inlet valve is installed on the sixth pipeline; the exhaust port of each ammonia storage tank is connected to the air inlet of the ammonia absorber through a seventh pipeline, and a ninth ball valve is installed on the seventh pipeline.

[0017] Furthermore, the inlet of the ammonia absorber is connected to the demineralized water pipeline network via a ninth pipe, which is equipped with a tenth ball valve; the exhaust port of the ammonia absorber is connected to the atmosphere via an eleventh pipe.

[0018] Furthermore, the dosing skid includes multiple metering pumps, the number of which is the same as the number of ammonia storage tanks and arranged in a one-to-one correspondence; each metering pump inlet is connected to the corresponding ammonia storage tank outlet via an eighth pipe, and the eighth pipe is sequentially equipped with an eleventh ball valve and a second filter along the direction of drug flow; each metering pump outlet is connected to the dosing point via a fourteenth pipe, and the fourteenth pipe is sequentially equipped with a first safety valve, a twelfth ball valve and a third check valve along the direction of drug flow; all eighth pipes are connected to the thirteenth pipe via a sixteenth ball valve.

[0019] Furthermore, the bottom of the ammonia storage tank is equipped with a drain outlet and a fourteenth ball valve, and the bottom of the ammonia absorber is equipped with a drain outlet and a fifteenth ball valve, for discharging wastewater from the ammonia storage tank and the ammonia absorber to the twelfth pipeline.

[0020] Furthermore, the ammonia absorber is provided with an overflow port on its side, which is used to discharge the overflow water in the ammonia absorber to the twelfth pipeline; the twelfth pipeline leads the wastewater to the sewage discharge point for unified collection and recycling treatment.

[0021] Furthermore, each of the ammonia storage tanks is also equipped with a first level gauge and a first concentration gauge.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model realizes efficient online dilution of liquid ammonia and preparation of ammonia water, and the process is simple and easy to operate, the dosing process is continuous and reliable, the liquid ammonia dilution process is safe, and the risk of ammonia leakage is small. It solves the technical problems of violent solution dilution process, easy leakage of ammonia and poor liquid ammonia dilution effect in the existing production process. Attached Figure Description

[0023] Figure 1 This is a structural block diagram of the online liquid ammonia dilution and ammonia water preparation device of this utility model;

[0024] 1. Liquid ammonia pipeline network; 101. First pipeline; 61. First pressure reducing valve; 65. First pressure gauge; 21. First ball valve; 41. First regulating valve; 22. Second ball valve; 51. First check valve; 102. Second pipeline; 23. Third ball valve; 42. Second regulating valve; 24. Fourth ball valve; 52. Second check valve; 3. Liquid ammonia primary absorber; 103. Third pipeline; 25. Fifth ball valve; 104. Fourth pipeline; 54. Fourth check valve; 33. Thirteenth ball valve; 26. Sixth ball valve; 4. Liquid ammonia secondary absorber; 5. Ammonia storage tank; 9. Pneumatic water supply valve; 62. First level gauge; 63. First concentration gauge; 105. Fifth pipeline; 27. Seventh Ball valve; 28, Eighth ball valve; 71, First filter; 6, Dilution water jet pump; 106, Sixth pipeline; 107, Seventh pipeline; 29, Ninth ball valve; 108, Eighth pipeline; 31, Eleventh ball valve; 72, Second filter; 7, Metering pump; 53, Third check valve; 32, Twelfth ball valve; 114, Fourteenth pipeline; 109, Ninth pipeline; 30, Tenth ball valve; 8, Ammonia absorber; 9, Pneumatic water supply valve; 10, Sewage discharge point; 11, Chemical dosing point; 110, Tenth pipeline; 111, Eleventh pipeline; 112, Twelfth pipeline; 33, Thirteenth ball valve; 34, Fourteenth ball valve; 35, Fifteenth ball valve; 36, Sixteenth ball valve. Detailed Implementation

[0025] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0026] In the description of this invention, unless otherwise specified, the terms "first," "second," etc., are used for the convenience of describing the objects referred to, and do not have any special significance in terms of importance or sequence.

[0027] The positional terms used in this invention, such as "upper," "lower," "outer," "inner," and "bottom," are generally for the convenience of those skilled in the art to understand intuitively based on the accompanying drawings, and are not intended to limit the orientation or structure of components, devices, etc., in the product of this invention. Any modifications or equivalent substitutions made within the spirit and principles of this invention are uniformly included within the protection scope of this invention.

[0028] like Figure 1 The online liquid ammonia dilution and ammonia water preparation device shown includes:

[0029] The liquid ammonia pressure stabilization and regulation module is connected to the liquid ammonia pipeline network and is used to receive liquid ammonia from the liquid ammonia pipeline network;

[0030] The demineralized water regulating module is connected to the demineralized water pipeline network and is used to receive demineralized water from the demineralized water pipeline network;

[0031] The liquid ammonia primary absorber is connected to the outlet of the liquid ammonia pressure stabilization and regulation module and the demineralized water regulation module, and is used to receive liquid ammonia and demineralized water.

[0032] The liquid ammonia secondary absorber module is connected to the outlet of the liquid ammonia primary absorber and is used to receive the mixed medium from the outlet of the liquid ammonia primary absorber.

[0033] The dilution water jet pump is used to draw and pressurize the solution in the ammonia storage tank module; the outlet of the dilution water jet pump is connected to the inlet of the liquid ammonia secondary absorber, and the outlet medium of the dilution water jet pump is used to draw the outlet medium of the liquid ammonia primary absorber.

[0034] The ammonia storage tank module is connected to the outlet of the liquid ammonia secondary absorber module and the inlet of the dilution water jet pump.

[0035] An ammonia absorber receives makeup water from the demineralized water storage network and is used to absorb ammonia gas emitted from the exhaust pipe of the ammonia storage tank. The ammonia absorber is equipped with a water inlet, an air inlet, an exhaust outlet, and an overflow outlet. The water inlet is connected to a water supply pipe, which is equipped with a water supply valve. The air inlet is connected to the exhaust pipe of the ammonia storage tank. The exhaust outlet is connected to an exhaust pipe, which is directly open to the atmosphere. The overflow outlet is connected to the drainage pipe of the ammonia storage tank.

[0036] The dosing skid has its inlet connected to the ammonia storage tank module solution outlet, and its outlet connected to the dosing point.

[0037] The control module includes a signal collector and a controller. The signal collector is connected to the first level gauge, the first concentration gauge, and the first pressure gauge, respectively. The controller is connected to the metering pump, the dilution water jet pump, the first pressure reducing valve, the first regulating valve, and the second regulating valve, respectively.

[0038] The liquid ammonia pressure stabilization and regulation module includes a first pipeline 101. A first pressure reducing valve 61, a first pressure gauge 65, a first ball valve 21, a first regulating valve 41, a second ball valve 22, and a first check valve 51 are installed sequentially on the first pipeline 101 along the material flow direction. The first pipeline 101 is connected between the liquid ammonia pipeline network 1 and the inlet of the liquid ammonia primary absorber 3.

[0039] The demineralized water regulating module includes a second pipe 102. A third ball valve 23, a second regulating valve 42, a fourth ball valve 24, and a second check valve 52 are installed sequentially on the second pipe 102 along the flow direction of the demineralized water. The second pipe 102 is connected between the demineralized water pipeline network 2 and the inlet of the liquid ammonia primary absorber 3.

[0040] The liquid ammonia secondary absorber module includes at least two sets of liquid ammonia secondary absorbers 4. The ammonia inlet of each set of liquid ammonia secondary absorbers 4 is connected to the outlet of the liquid ammonia primary absorber 3 via a third pipeline 103. A fifth ball valve 25 is installed on the third pipeline 103. The dilution water inlet of each set of liquid ammonia secondary absorbers 4 is connected to the outlet of the dilution water jet pump 6 via a fourth pipeline 104. A fourth check valve 54, a thirteenth ball valve 33, and a sixth ball valve 26 are installed sequentially along the direction of medium flow on the fourth pipeline 104.

[0041] The ammonia storage tank module includes multiple ammonia storage tanks 5, the number of which is the same as the number of liquid ammonia secondary absorbers and they are arranged in a one-to-one correspondence and connected manner. The first outlet of each ammonia storage tank 5 is connected to the inlet of the dilution water jet pump 6 via a fifth pipeline 105. The fifth pipeline 105 is equipped with a seventh ball valve 27, an eighth ball valve 28, and a first filter 71 in sequence along the direction of medium flow. The water inlet of each ammonia storage tank 5 is connected to the demineralized water network 2 via a sixth pipeline 106. The sixth pipeline 106 is equipped with a pneumatic water inlet valve 9. The exhaust port of each ammonia storage tank 5 is connected to the air inlet of the ammonia absorber 8 via a seventh pipeline 107. The seventh pipeline 107 is equipped with a ninth ball valve 29. Each ammonia storage tank 5 is also equipped with a first level gauge 62 and a first concentration gauge 63. The first level gauge is used to measure the liquid level of the solution in the ammonia storage tank. The first concentration gauge is used to measure the concentration of the solution in the ammonia storage tank.

[0042] The inlet of the ammonia absorber 8 is connected to the demineralized water network 2 via a ninth pipe 109, and a tenth ball valve 30 is installed on the ninth pipe 109; the exhaust port of the ammonia absorber 8 is connected to the atmosphere via an eleventh pipe 111.

[0043] The dosing skid includes multiple metering pumps 7, the number of which is the same as the number of ammonia storage tanks 5 and arranged in a one-to-one correspondence; the inlet of each metering pump 7 is connected to the outlet of the corresponding ammonia storage tank 5 via an eighth pipe 108, and the eighth pipe 108 is sequentially equipped with an eleventh ball valve 31 and a second filter 72 along the direction of drug flow; the outlet of each metering pump 7 is connected to the dosing point 11 via a fourteenth pipe 114, and the fourteenth pipe 114 is sequentially equipped with a first safety valve 81, a twelfth ball valve 32 and a third check valve 53 along the direction of drug flow; all eighth pipes 108 are connected to the thirteenth pipe 113 via a sixteenth ball valve 36.

[0044] The bottom of the ammonia storage tank 5 is equipped with a drain outlet and a fourteenth ball valve 34, and the bottom of the ammonia absorber 8 is equipped with a drain outlet and a fifteenth ball valve 35, which are used to discharge the wastewater in the ammonia storage tank 5 and the ammonia absorber 8 to the twelfth pipeline 112; the side of the ammonia absorber 8 is equipped with an overflow outlet, which is used to discharge the overflow water in the ammonia absorber 8 to the twelfth pipeline 112; the twelfth pipeline 112 leads the wastewater to the sewage discharge point 10 for unified collection and recycling treatment.

[0045] The dosing process of this new dosing device is as follows:

[0046] S1) Ammonia water storage tank replenishment: The pneumatic water replenishment valve is opened through the control module to replenish the ammonia water storage tank, and the liquid level of the ammonia water storage tank is measured through the first liquid level gauge of the ammonia water storage tank; when the liquid level of the ammonia water storage tank reaches the set liquid level, the pneumatic water replenishment valve is closed through the control module.

[0047] S2) Start the dilution water jet pump to inject water into the liquid ammonia secondary absorber and establish the dilution water suction circuit of the liquid ammonia secondary absorber.

[0048] S3) Liquid ammonia and demineralized water transportation: Open the second regulating valve to establish a demineralized water transportation channel and enter the liquid ammonia primary absorber; open the first pressure reducing valve and the first regulating valve to establish a liquid ammonia transportation channel and enter the liquid ammonia primary absorber; when the first concentration gauge detects that the liquid ammonia concentration in the ammonia storage tank has reached the concentration range required for dosing, close the first regulating valve, the first pressure reducing valve and the second regulating valve; when the first level gauge detects that the ammonia storage tank has reached a high level, close the second regulating valve.

[0049] S4) After the first regulating valve and the second regulating valve are closed, the dilution water injection pump is turned off, and the solution in the ammonia storage tank is transported to the dosing point through the dosing skid.

[0050] S5) When the first level gauge detects that the liquid level in the ammonia storage tank has dropped to a low level, repeat S1) to S4).

[0051] The examples given are for illustrative purposes only and are not intended to limit the scope of this invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of this invention are equally included within the protection scope of this invention.

Claims

1. An online liquid ammonia dilution and ammonia water preparation device, characterized in that: include The liquid ammonia pressure stabilization and regulation module is connected to the liquid ammonia pipeline network and is used to receive liquid ammonia from the liquid ammonia pipeline network; The demineralized water regulating module is connected to the demineralized water pipeline network and is used to receive demineralized water from the demineralized water pipeline network; The liquid ammonia primary absorber is connected to the outlet of the liquid ammonia pressure stabilization and regulation module and the demineralized water regulation module, and is used to receive liquid ammonia and demineralized water. The liquid ammonia secondary absorber module is connected to the outlet of the liquid ammonia primary absorber and is used to receive the mixed medium from the outlet of the liquid ammonia primary absorber. The dilution water jet pump is used to draw and pressurize the solution in the ammonia storage tank module; The ammonia storage tank module is connected to the outlet of the liquid ammonia secondary absorber module and the inlet of the dilution water jet pump. The ammonia absorber receives makeup water from the demineralized water storage network and is used to absorb ammonia gas discharged from the exhaust pipe of the ammonia storage tank. The dosing skid has its inlet connected to the ammonia storage tank module solution outlet, and its outlet connected to the dosing point.

2. The online liquid ammonia dilution and ammonia water preparation device according to claim 1, characterized in that: The liquid ammonia pressure stabilization and regulation module includes a first pipeline (101), on which a first pressure reducing valve (61), a first pressure gauge (65), a first ball valve (21), a first regulating valve (41), a second ball valve (22) and a first check valve (51) are installed in sequence along the material flow direction. The first pipeline (101) is connected between the liquid ammonia pipeline network (1) and the inlet of the liquid ammonia primary absorber (3).

3. The online liquid ammonia dilution and ammonia water preparation device according to claim 1, characterized in that: The demineralized water regulating module includes a second pipe (102), on which a third ball valve (23), a second regulating valve (42), a fourth ball valve (24) and a second check valve (52) are installed in sequence along the flow direction of the demineralized water. The second pipe (102) is connected between the demineralized water pipeline network (2) and the inlet of the liquid ammonia primary absorber (3).

4. The online liquid ammonia dilution and ammonia water preparation device according to claim 1, characterized in that: The liquid ammonia secondary absorber module includes at least two sets of liquid ammonia secondary absorbers (4). The ammonia inlet of each set of liquid ammonia secondary absorbers (4) is connected to the outlet of the liquid ammonia primary absorber (3) through a third pipeline (103). A fifth ball valve (25) is installed on the third pipeline (103). The dilution water inlet of each set of liquid ammonia secondary absorbers (4) is connected to the outlet of the dilution water jet pump (6) through a fourth pipeline (104). A fourth check valve (54), a thirteenth ball valve (33), and a sixth ball valve (26) are installed on the fourth pipeline (104) in sequence along the direction of medium flow.

5. The online liquid ammonia dilution and ammonia water preparation device according to claim 4, characterized in that: The ammonia storage tank module includes multiple ammonia storage tanks (5), the number of which is the same as the number of liquid ammonia secondary absorbers (4) and they are arranged in a one-to-one correspondence; the first outlet of each ammonia storage tank (5) is connected to the inlet of the dilution water jet pump (6) through a fifth pipeline (105), and the fifth pipeline (105) is equipped with a seventh ball valve (27), an eighth ball valve (28) and a first filter (71) in sequence along the medium flow direction; the water inlet of each ammonia storage tank (5) is connected to the demineralized water network (2) through a sixth pipeline (106), and the sixth pipeline (106) is equipped with a pneumatic water inlet valve (9); the exhaust port of each ammonia storage tank (5) is connected to the air inlet of the ammonia absorber (8) through a seventh pipeline (107), and the seventh pipeline (107) is equipped with a ninth ball valve (29).

6. The online liquid ammonia dilution and ammonia water preparation device according to claim 1, characterized in that: The inlet of the ammonia absorber (8) is connected to the demineralized water network (2) via a ninth pipe (109), and a tenth ball valve (30) is installed on the ninth pipe (109); the exhaust port of the ammonia absorber (8) is connected to the atmosphere via an eleventh pipe (111).

7. The online liquid ammonia dilution and ammonia water preparation device according to claim 5, characterized in that: The dosing skid includes multiple metering pumps (7), the number of which is the same as the number of ammonia storage tanks (5) and they are arranged in a one-to-one correspondence; the inlet of each metering pump (7) is connected to the outlet of the corresponding ammonia storage tank (5) through an eighth pipe (108), and the eighth pipe (108) is sequentially equipped with an eleventh ball valve (31) and a second filter (72) along the direction of drug flow; the outlet of each metering pump (7) is connected to the dosing point (11) through a fourteenth pipe (114), and the fourteenth pipe (114) is sequentially equipped with a first safety valve (81), a twelfth ball valve (32) and a third check valve (53) along the direction of drug flow; all the eighth pipes (108) are connected to the thirteenth pipe (113) through a sixteenth ball valve (36).

8. The online liquid ammonia dilution and ammonia water preparation device according to claim 5, characterized in that: The ammonia storage tank (5) is equipped with a drain outlet and a fourteenth ball valve (34) at the bottom, and the ammonia absorber (8) is equipped with a drain outlet and a fifteenth ball valve (35) at the bottom, for discharging the wastewater in the ammonia storage tank (5) and the ammonia absorber (8) to the twelfth pipeline (112).

9. The online liquid ammonia dilution and ammonia water preparation device according to claim 1, characterized in that: The ammonia absorber (8) is provided with an overflow port on its side, which is used to discharge the overflow water in the ammonia absorber (8) to the twelfth pipeline (112); the twelfth pipeline (112) leads the wastewater to the sewage discharge point (10) for unified collection and recycling treatment.

10. The online liquid ammonia dilution and ammonia water preparation device according to claim 5, characterized in that: Each of the ammonia storage tanks (5) is also equipped with a first level gauge (62) and a first concentration gauge (63).

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