Ammonia water storage equipment

Abstract

The utility model relates to ammonia water storage equipment which comprises an ammonia water storage tank, a safety gas supply device and a gas removal device, the safety gas supply device is communicated with the ammonia water storage tank and is used for conveying safety gas into the ammonia water storage tank, so that air is prevented from being in contact with ammonia gas, and the gas removal device is used for removing the ammonia gas from the ammonia water storage tank. The gas removal device is communicated with the upper gas space of the ammonia water storage tank and is constructed to be used for removing gas in the upper gas space of the ammonia water storage tank, and the ammonia water storage equipment further comprises a breather valve; the breather valve is configured to intervene when the safety gas cannot normally enter the ammonia water storage tank and / or the gas in the upper gas space of the ammonia water storage tank cannot be normally removed from the ammonia water storage tank. Therefore, the burden of the breather valve can be reduced, and the damage risk of the breather valve is reduced. Particularly, by arranging the safety gas supply device, safety gas can enter the ammonia water storage tank, air is prevented from making contact with ammonia gas, and the accident risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of environmental protection equipment, more particularly to a kind of ammonia water storage equipment. BACKGROUND

[0002] In ammonia desulfurization process, ammonia water is usually used as absorbent. Since ammonia water is extremely volatile, ammonia water is generally stored in ammonia water storage tank, and a large amount of ammonia gas is volatilized in the upper part of ammonia water storage tank. When ammonia water is injected into ammonia water storage tank, the upper space of tank body gradually decreases, and the pressure of ammonia gas in the upper part of tank body gradually increases. When the pressure increases to a certain extent, ammonia water cannot be continuously injected into the tank body, so that the space in the tank body cannot be fully utilized. When ammonia water is needed, the upper space in the tank body gradually increases as ammonia water is discharged from the tank body, and the pressure of ammonia gas in the upper part of tank body gradually decreases. When the pressure decreases to a certain extent, the ammonia water in the tank body cannot be completely discharged due to the large pressure difference between the inside and outside of the tank body. To solve the above problems, a breather valve is usually provided in the upper part of the tank body of the existing ammonia water storage tank. When the gas pressure in the tank body rises to a certain extent, the actuating mechanism of the breather valve can be opened, so that the gas in the tank body can overflow to the outside of the tank body, thereby fully utilizing the space in the tank body, and the ammonia gas overflowing to the outside of the tank body can be recycled by an external water tank. When the pressure of the gas in the tank body decreases, the actuating mechanism of the breather valve is opened by the air outside the tank body, and the air outside the tank body can enter the tank, so that the pressure in the tank body no longer decreases, to ensure the balance of the pressure inside and outside the tank body, so as to completely discharge the ammonia water in the tank body.

[0003] However, for ammonia water storage tank, since ammonia water is volatile, the explosion limit range of ammonia gas is generally 16-25% (by volume), and the air outside the tank can easily enter the tank, which can easily cause safety accidents. In addition, since continuous operation is required, the frequency of feeding and discharging is high, and feeding and discharging can cause the breather valve to act, so the risk of breather valve damage is high. In addition, the structure of the breather valve is complex, and the maintenance and repair workload is large, so the use and maintenance cost of the ammonia water storage tank is high. UTILITY MODEL CONTENTS

[0004] Therefore, the purpose of the utility model is to provide an ammonia water storage equipment which can eliminate ammonia gas accident hazards and reduce the burden and damage risk of the breather valve.

[0005] The object can be achieved by an ammonia water storage device, characterized in that the ammonia water storage device comprises an ammonia water storage tank, a safety gas supply device and a gas removal device, wherein the safety gas supply device is in communication with the ammonia water storage tank and is configured to deliver safety gas into the ammonia water storage tank and thereby prevent air from coming into contact with ammonia gas, the gas removal device is in communication with an upper gas space of the ammonia water storage tank and is configured to remove gas in the upper gas space of the ammonia water storage tank, and the ammonia water storage device further comprises a breather valve configured to intervene when safety gas cannot normally enter the ammonia water storage tank and / or gas in the upper gas space of the ammonia water storage tank cannot normally be removed from the ammonia water storage tank.

[0006] In the present application, by providing the safety gas supply device, safety gas can enter the ammonia water storage tank to prevent air from coming into contact with ammonia gas, and the safety gas does not react with the ammonia gas, thus there is no risk of accidents.

[0007] Furthermore, in the present application, by providing the safety gas supply device and the gas removal device, safety gas can enter the ammonia water storage tank to prevent negative pressure from occurring in the ammonia water storage tank, and gas in the upper space of the ammonia water storage tank can be removed by the gas removal device to prevent positive pressure from occurring in the ammonia water storage tank, thus maintaining the normal pressure of the ammonia water storage tank. In addition, the breather valve can play a role in accident protection in emergency situations. Thus, compared with the prior art, the normal operation of the breather valve is replaced by the safety gas supply device and the gas removal device, and the breather valve only serves as a backup device to play a protective role in emergency situations, thus the workload of the breather valve can be reduced, the working burden of the breather valve is reduced, and the risk of damage to the breather valve is reduced.

[0008] In some embodiments, the safety gas supply device comprises a safety gas delivery pipeline that opens into the ammonia water storage tank and is configured to allow safety gas to enter the ammonia water storage tank.

[0009] In some embodiments, the gas removal device comprises an ammonia gas absorption device in which an ammonia gas absorption liquid for absorbing ammonia gas is provided.

[0010] In some embodiments, the gas removal device comprises a gas discharge pipeline leading from the ammonia water storage tank to the ammonia gas absorption device, a gas discharge pipeline outlet of the gas discharge pipeline being located below the liquid level of the ammonia gas absorption liquid.

[0011] In some embodiments, the ammonia water storage device comprises a reflux pipeline returning from the ammonia gas absorption device to the ammonia water storage tank.

[0012] In some embodiments, the reflux pipeline is configured as an overflow pipe having a bent overflow structure and configured for returning the ammonia absorption liquid into the ammonia water storage tank in case of reaching an overflow level.

[0013] In some embodiments, a vent hole is provided on the ammonia absorption device, which is in communication with the atmosphere and configured for maintaining normal pressure of the ammonia absorption device.

[0014] In some embodiments, the ammonia water storage apparatus includes a liquid supplement pipeline which opens into the ammonia absorption device and is configured for supplementing the ammonia absorption liquid into the ammonia absorption device.

[0015] In some embodiments, the ammonia water storage apparatus includes a pressure sensor which is in action connection with the upper gas space of the ammonia water storage tank and is configured for detecting the gas pressure in the upper gas space of the ammonia water storage tank.

[0016] In some embodiments, an adjusting valve is provided on the safety gas delivery pipeline, which is configured for adjusting the delivery flow of the safety gas.

[0017] In some embodiments, the adjusting valve is interlocked with the pressure sensor, so that the gas pressure of the ammonia water storage tank can be automatically controlled.

[0018] In some embodiments, the breathing valve is a double-acting breathing valve which can be opened in two directions, and is configured to be opened not only for air intake when the safety gas cannot normally enter the ammonia water storage tank, but also for air exhaust when the ammonia gas cannot be normally discharged from the ammonia water storage tank.

[0019] In some embodiments, the breathing valve is a single-acting breathing valve which can be opened in only one direction, and is configured for air intake when the safety gas cannot normally enter the ammonia water storage tank.

[0020] In some embodiments, the breathing valve has a pressure trigger structure which is in pressure communication with the ammonia water storage tank and is configured for opening the breathing valve when the pressure in the ammonia water storage tank reaches a corresponding pressure threshold.

[0021] In some embodiments, the safety gas is nitrogen.

[0022] In some embodiments, the ammonia absorption liquid is water. BRIEF DESCRIPTION OF DRAWINGS

[0023] The utility model will be further illustrated below by referring to the illustrative drawings and exemplary embodiments. Among them:

[0024] Figure 1 is a schematic structural view of an ammonia storage device according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] In the following, the ammonia storage device according to an embodiment of the present application is described with reference to the accompanying drawings. Figure 1 The ammonia storage device according to an embodiment of the present application is described.

[0026] As Figure 1As shown in the figure, the ammonia storage device according to the utility model has an ammonia storage tank 1, which is provided with an ammonia inlet pipe 2 and an ammonia outlet pipe 3. The ammonia storage tank 1 can also be referred to as an ammonia tank. The following two situations can occur in the ammonia storage tank 1, situation one is overpressure, which is caused by the following: ammonia is stored in the ammonia storage tank 1, and the ammonia gas therein is easy to volatilize, which causes a large amount of volatilized ammonia gas to exist in the upper part of the ammonia storage tank 1, which can cause the ammonia gas pressure in the upper part of the ammonia storage tank 1 to increase. In addition, if ammonia is delivered into the ammonia storage tank 1 through the ammonia inlet pipe 2, this causes the liquid level in the ammonia storage tank 1 to rise and thereby compresses the gas space in the upper part of the ammonia storage tank 1, thereby further increasing the gas pressure in the upper part of the ammonia storage tank 1. If the gas pressure in the upper part of the ammonia storage tank 1 is too high or if overpressure occurs in the space in the upper part of the ammonia storage tank 1, it will cause ammonia to be unable to be delivered through the ammonia inlet pipe 2; situation two is negative pressure, which is caused by the following: if ammonia is to be discharged outward through the ammonia outlet pipe 3, it will cause the liquid level in the ammonia storage tank 1 to drop and cause the gas space in the upper part of the ammonia storage tank 1 or above the liquid level to become negative pressure, which in turn can cause ammonia to be unable to be discharged through the ammonia outlet pipe 3. In order to solve the above problems, in the utility model, the ammonia storage device further comprises a safety gas supply device, which communicates with the ammonia storage tank 1 and is configured to deliver safety gas into the ammonia storage tank 1 for delivering safety gas into the ammonia storage tank 1. This is designed for the negative pressure situation. By delivering safety gas into the ammonia storage tank 1 through the safety gas delivery pipeline 4, on the one hand, the safety gas entering the ammonia storage tank 1 can isolate the ammonia storage tank 1 from air, prevent the contact between ammonia gas and oxygen in the air, and thereby reduce the risk of explosion or even completely prevent explosion, on the other hand, the safety gas can enter the ammonia storage tank 1 when negative pressure may occur in the ammonia storage tank 1 to maintain the ammonia storage tank 1 at normal pressure. In the utility model, "safety gas" refers to a gas that does not react with oxygen and ammonia in the air. The safety gas is preferably nitrogen. When the safety gas is nitrogen, the isolation effect of nitrogen on the ammonia storage tank 1 can be referred to as "nitrogen sealing". In addition, the ammonia storage device further comprises a gas removal device, which communicates with the upper gas space of the ammonia storage tank 1 and is configured to remove the gas in the upper gas space of the ammonia storage tank 1. This is designed for the overpressure situation. Through the gas removal device, excess ammonia gas and safety gas that can cause overpressure in the upper gas space of the ammonia storage tank 1 can be removed from the upper gas space to maintain the ammonia storage tank 1 at normal pressure. In the utility model, the ammonia storage device further comprises a breather valve 7, which intervenes when safety gas cannot normally enter the ammonia storage tank 1 and / or ammonia cannot be normally discharged from the ammonia storage tank 1.That is, the breathing valve 7 intervenes to replace the corresponding safety gas supply device and / or gas removal device to work or act when the safety gas supply device and / or gas removal device cannot work normally.

[0027] For the safety gas supply device, in one embodiment, the gas supply device comprises a safety gas delivery line 4 which opens into the ammonia water storage tank 1 and is configured for the safety gas to enter the ammonia water storage tank 1. The safety gas delivery line 4 is connected at the top of the ammonia water storage tank 1.

[0028] For the gas removal device, in one embodiment, the gas removal device comprises an ammonia gas absorption device 9 in which an ammonia gas absorption liquid for absorbing ammonia gas is arranged. The ammonia gas absorption device 9 is particularly configured as a sealed tank. The ammonia gas absorption liquid is preferably water. In order to introduce the gas from the ammonia water storage tank 1 into the ammonia gas absorption device 9, the gas removal device comprises a gas discharge line 8 which leads from the ammonia water storage tank 1 to the ammonia gas absorption device 9. The gas discharge line 8 outlet of the gas discharge line 8 is located below the liquid level of the ammonia gas absorption liquid to increase the absorption efficiency of the ammonia gas absorption liquid. The connection point of the gas discharge line 8 with the ammonia water storage tank 1 can be located at the top tip of the ammonia water storage tank 1. In addition, the ammonia water storage device also comprises a backflow line which returns from the ammonia gas absorption device 9 to the ammonia water storage tank 1. The backflow line can be configured as an overflow pipe 12 which has a bent overflow structure and is configured for the ammonia gas absorption liquid to return to the ammonia water storage tank 1 if the overflow liquid level is reached. The overflow pipe 12 outlet in the ammonia water storage tank 1 is inserted below the liquid level of the ammonia water storage tank 1. In order to maintain the normal pressure state of the ammonia gas absorption device 9, a vent hole 11 is arranged on the ammonia gas absorption device 9 which communicates with the atmosphere. In addition, the ammonia water storage device also comprises a liquid supplement line 10 which opens into the ammonia gas absorption device 9 and is configured for the ammonia gas absorption liquid to be supplemented into the ammonia gas absorption device 9. When the ammonia gas absorption liquid is water, the liquid supplement line 10 can also be referred to as a water supplement line.

[0029] In order to realize automatic pressure regulation, the ammonia water storage device comprises a pressure sensor 6 which is in action connection with the upper gas space of the ammonia water storage tank 1 and is configured for detecting the gas pressure in the upper gas space of the ammonia water storage tank 1. The pressure sensor 6 can be configured as a pressure transmitter. In addition, an adjusting valve 5 for adjusting the delivery flow of the safety gas is arranged on the safety gas delivery line 4. The adjusting valve 5 is interlocked with the pressure sensor 6, so that the gas pressure of the ammonia water storage tank 1 can be automatically controlled.

[0030] The construction of the breather valve 7 will be described next. In one embodiment, the breather valve 7 can be a double-acting breather valve which can open in both directions, i.e. not only to admit air in case the safety gas cannot enter the ammonia water tank 1 normally and thereby maintain the normal pressure in the ammonia water tank 1, but also to discharge air in case the ammonia gas cannot be discharged from the ammonia water tank 1 normally and thereby maintain the normal pressure in the ammonia water tank 1 as well. That is, in this embodiment, the double-acting breather valve can both "breathe out" and "breathe in". In another embodiment, the breather valve 7 is a single-acting breather valve which can open in only one direction, i.e. to admit air in case the safety gas cannot enter the ammonia water tank 1 normally and thereby maintain the normal pressure in the ammonia water tank 1. Here, "the safety gas cannot enter the ammonia water tank 1 normally" can be due to a failure of the safety gas supply, e.g. a blockage of the safety gas supply line, or due to a failure of the regulating valve 5, and "the ammonia gas cannot be discharged from the ammonia water tank 1 normally" can be due to a failure of the gas removal device, e.g. a blockage of the gas discharge line 8. However, in general, the probability of a blockage of the gas discharge line 8 is low, and therefore, if the breather valve 7 is a single-acting breather valve, the single-acting breather valve is preferably designed for the unlikely event of a failure of the safety gas supply. For the breather valve 7, a certain trigger pressure can be set. To this end, the breather valve 7 can have a pressure trigger structure which is in pressure communication with the ammonia water tank 1 and is configured to open the breather valve 7 when the pressure in the ammonia water tank 1 reaches a corresponding pressure threshold.

[0031] It is to be noted that the terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. In the description of the figures, like numbers refer to like elements throughout.

[0032] The thicknesses of the elements in the figures can be exaggerated for clarity. It will be understood that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.).

[0033] The terms "top," "bottom," "front," "back," "over," "under," and the like in the description and the claims, if any, are used for relative position only and do not deem to refer to an absolute position of an item described.

[0034] It is to be understood that the terms "first," "second," and the like, used herein do not connote any hierarchy, quantity, or order but are used to distinguish one element from another. Thus, a first element could be termed a second element without departing from the teachings of the present disclosure.

[0035] It is also to be understood that all the example embodiments disclosed herein can be combined with each other, as long as they are not mutually exclusive. In addition, all the individual technical features in the present application can be combined with each other, as long as the technical features to be combined are not mutually exclusive. All technically feasible combinations are part of the technical content of the present application.

[0036] Finally, it is to be pointed out that the above-described embodiments are merely used for understanding the present disclosure, and do not constitute a limitation on the protection scope of the present disclosure. Modifications can be made by those skilled in the art on the basis of the above-described embodiments, and these modifications do not depart from the protection scope of the present disclosure.

Claims

1. An ammonia water storage device characterized by comprising: The ammonia water storage device comprises an ammonia water storage tank, a safety gas supply device and a gas removal device, wherein the safety gas supply device is in communication with the ammonia water storage tank and is configured to deliver safety gas into the ammonia water storage tank and thereby prevent ammonia gas from contacting air, the gas removal device is in communication with an upper gas space of the ammonia water storage tank and is configured to remove gas in the upper gas space of the ammonia water storage tank, and the ammonia water storage device further comprises a breathing valve configured to intervene when safety gas cannot normally enter the ammonia water storage tank and / or gas in the upper gas space of the ammonia water storage tank cannot normally be removed from the ammonia water storage tank.

2. The ammonia water storage apparatus according to claim 1, characterized by The safety gas supply device comprises a safety gas delivery pipeline which opens into the ammonia water storage tank and is configured to allow safety gas to enter the ammonia water storage tank.

3. The ammonia water storage apparatus according to claim 1, characterized by, The gas removal device comprises an ammonia gas absorption device in which an ammonia gas absorption liquid for absorbing ammonia gas is provided.

4. The ammonia water storage apparatus according to claim 3, characterized by The gas removal device comprises a gas discharge pipeline which leads from the ammonia water storage tank to the ammonia gas absorption device, and a gas discharge pipeline outlet of the gas discharge pipeline is located below a liquid level of the ammonia gas absorption liquid.

5. The ammonia water storage apparatus according to claim 3, characterized by The ammonia water storage device comprises a reflux pipeline which returns from the ammonia gas absorption device to the ammonia water storage tank.

6. The ammonia water storage apparatus according to claim 5, characterized by The reflux pipeline is configured as an overflow pipeline which has a bent overflow structure and is configured to return the ammonia gas absorption liquid to the ammonia water storage tank if an overflow liquid level is reached.

7. The ammonia water storage apparatus according to claim 3, characterized by A vent hole is provided on the ammonia gas absorption device, the vent hole is in communication with the atmosphere and is configured to maintain normal pressure of the ammonia gas absorption device; and / or the ammonia water storage device comprises a liquid supplement pipeline which opens into the ammonia gas absorption device and is configured to supplement the ammonia gas absorption liquid into the ammonia gas absorption device.

8. The ammonia water storage apparatus according to claim 2, characterized by The ammonia water storage device comprises a pressure sensor which is in action connection with the upper gas space of the ammonia water storage tank and is configured to detect gas pressure in the upper gas space of the ammonia water storage tank; and / or an adjusting valve is provided on the safety gas delivery pipeline, the adjusting valve is configured to adjust the delivery flow of safety gas; and / or the adjusting valve is interlocked with the pressure sensor, so that the gas pressure of the ammonia water storage tank can be automatically controlled.

9. The ammonia water storage apparatus according to claim 1, characterized by The breathing valve is a bidirectional breathing valve which can be opened in two directions, the bidirectional breathing valve is configured to be opened not only for air intake when safety gas cannot normally enter the ammonia water storage tank, but also for air exhaust when ammonia gas cannot be normally discharged from the ammonia water storage tank; and / or the breathing valve is a unidirectional breathing valve which can be opened in only one direction, the unidirectional breathing valve is configured to be opened for air intake when safety gas cannot normally enter the ammonia water storage tank; and / or the breathing valve has a pressure trigger structure which is in pressure communication with the ammonia water storage tank and is configured to open the breathing valve when the pressure in the ammonia water storage tank reaches a corresponding pressure threshold; And / or the safety gas is nitrogen.

10. The ammonia water storage apparatus according to claim 3, characterized by The ammonia gas absorption liquid is water.

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