CN219932290U - Ammonia gas treatment device and SCR system - Google Patents

Abstract

The utility model belongs to the technical field of ammonia recovery, and discloses an ammonia treatment device and an SCR system, wherein the ammonia treatment device comprises an ammonia collection system and an ammonia concentration adjusting system, the ammonia collection system comprises a collection vessel, an ammonia solution storage and a lightering component, the volatilized ammonia in an ammonia fuel supply system can be led into the collection vessel and is mutually dissolved with fresh water to form ammonia solution, the lightering component is suitable for lightering the ammonia solution in the collection vessel to the ammonia solution storage when the ammonia solution in the collection vessel reaches a certain concentration or liquid level, the ammonia concentration adjusting system comprises a mixing pipe, a liquid ammonia supplementing component and a fresh water supplementing component, the ammonia solution in the ammonia solution storage can be led into the mixing pipe, and the liquid ammonia supplementing component and the fresh water supplementing component are used for adjusting the concentration of the ammonia solution in the mixing pipe; the SCR system comprises the ammonia gas treatment device. The ammonia gas treatment device and the SCR system provided by the utility model can effectively treat and recycle the volatilized ammonia gas in the ammonia fuel supply system.

Description

Ammonia gas treatment device and SCR system

Technical Field

The utility model relates to the technical field of ammonia recovery, in particular to an ammonia treatment device and an SCR system.

Background

Future zero emission fuel shipping has seen ammonia as one of the potential routes to ocean decarbonization because such fuels theoretically produce only nitrogen and water after combustion, and no carbonaceous material. Currently, during operation of a marine host ammonia fuel supply system, a supply line supplies ammonia fuel from a fuel tank to a host by pressurizing it with a high pressure pump to a pressure of 80bar, the medium conveyed throughout the line being liquid ammonia. In the circulation system, if part of the ammonia is converted into gas due to the temperature rise, but ammonia is a toxic substance, it is highly toxic to both personnel and marine organisms, and this part of the ammonia cannot be released or leaked into the atmosphere or the ocean in a non-emergency situation. Accordingly, there is a need to develop a device capable of properly treating the volatilized ammonia gas in an ammonia fuel supply system to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide an ammonia gas treatment device and an SCR system, which can effectively treat and recycle the volatilized ammonia gas in an ammonia fuel supply system.

To achieve the purpose, the utility model adopts the following technical scheme:

an ammonia gas treating device for treating volatilized ammonia gas in an ammonia fuel supply system, the ammonia gas treating device comprising:

the ammonia gas collecting system comprises a collecting vessel, an ammonia solution storage and a lightering component, wherein a fresh water supplementing valve is arranged on the collecting vessel and used for introducing fresh water into the collecting vessel, the ammonia gas volatilized in the ammonia fuel supply system is led into the collecting vessel through a collecting pipeline and is mutually dissolved with the fresh water in the collecting vessel to form ammonia solution, and the lightering component is suitable for lightering the ammonia solution into the ammonia solution storage when the ammonia solution in the collecting vessel reaches a certain concentration or a certain liquid level;

the ammonia concentration adjusting system comprises a mixing pipe, a liquid ammonia supplementing component and a fresh water supplementing component, wherein the mixing pipe is communicated with the ammonia solution storage, the ammonia solution in the ammonia solution storage can be introduced into the mixing pipe, the liquid ammonia supplementing component is used for introducing liquid ammonia into the ammonia solution in the mixing pipe, and the fresh water supplementing component is used for introducing fresh water into the ammonia solution in the mixing pipe.

Optionally, a first concentration sensor is disposed in the collection vessel for measuring the concentration of the ammonia solution in the collection vessel.

Optionally, a liquid level sensor is arranged on the collecting vessel and is used for measuring the liquid level height of the ammonia solution in the collecting vessel.

Optionally, the transfer assembly includes a conduit and a transfer pump disposed on the conduit, and two ends of the conduit respectively extend into the collection vessel and the ammonia solution storage.

Optionally, the liquid ammonia replenishing subassembly includes liquid ammonia replenishing pipe way and locates the first ooff valve on the liquid ammonia replenishing pipe way, liquid ammonia replenishing pipe way intercommunication the mixing tube is used for to let in the mixing tube liquid ammonia, first ooff valve is used for switching liquid ammonia replenishing pipe way.

Optionally, the liquid ammonia supplementing pipeline is further provided with a heating device for heating the liquid ammonia introduced into the liquid ammonia supplementing pipeline.

Optionally, the fresh water supplementing assembly comprises a fresh water supplementing pipeline and a second switch valve arranged on the fresh water supplementing pipeline, wherein the fresh water supplementing pipeline is communicated with the mixing pipe and is used for introducing fresh water into the mixing pipe, and the second switch valve is used for switching the fresh water supplementing pipeline.

Optionally, a second concentration sensor is disposed on the mixing tube, and is used for measuring the concentration of the ammonia solution in the mixing tube.

Optionally, a supply pipeline is arranged between the mixing pipe and the ammonia solution storage, and a third switch valve and a supply pump are arranged on the supply pipeline.

An SCR system comprising the ammonia gas treatment device according to any one of the above, the SCR system further comprising an SCR reactor in communication with the mixing tube, the ammonia solution in the mixing tube being introduced into the SCR reactor after being adjusted to a certain concentration.

The beneficial effects are that:

when the ammonia solution in the collection vessel reaches a certain concentration or a certain liquid level, the ammonia solution in the collection vessel is transferred to the ammonia solution storage through the transfer component for storage, and further can be used by an SCR system on a ship, on one hand, the part of volatilized ammonia gas is prevented from being directly released or leaked to the atmosphere or the ocean, and the part of ammonia gas can be fully used.

In addition, when the ammonia treatment device provided by the utility model is used in an SCR system, when the SCR system works and chemical reaction is required, ammonia solution in the ammonia solution storage is required to be used, at the moment, the ammonia solution in the ammonia solution storage can be introduced into the mixing pipe, the ammonia solution in the mixing pipe can be adjusted by the liquid ammonia supplementing component and the fresh water supplementing component, so that the ammonia solution can reach the concentration required by the subsequent participation in the SCR reaction, then the ammonia solution with the adjusted concentration is introduced into the SCR reactor for catalytic reduction reaction, and the ammonia gas collected before is used as a reaction substance for reducing NOx products, so that the emission of ship tail gas further meets the IMO requirement, urea is not required to be consumed, the consumption of redundant ammonia solution is reduced, and the reasonable allocation of resources is further ensured.

Drawings

FIG. 1 is a schematic diagram of an ammonia collection system according to the present utility model;

FIG. 2 is a schematic diagram of an ammonia concentration regulating system provided by the present utility model;

fig. 3 is a schematic structural diagram of an SCR system provided by the present utility model.

In the figure:

100. an ammonia collection system; 110. collecting a dish; 111. a fresh water replenishing valve; 112. a collecting pipeline; 113. a first concentration sensor; 114. a liquid level sensor; 120. an ammonia solution storage; 130. a lightering assembly; 131. a conduit; 132. a pump for transferring; 140. a supply line; 141. a third switching valve; 142. a supply pump;

200. an ammonia concentration adjustment system; 210. a mixing tube; 211. a second concentration sensor; 220. a liquid ammonia replenishing assembly; 221. a liquid ammonia replenishing pipeline; 222. a first switching valve; 223. a heating device; 230. a fresh water replenishing assembly; 231. fresh water supplementing pipeline; 232. a second switching valve; 240. a conveying channel;

300. an SCR reactor;

400. a dust removal device; 410. an air supply device; 420. a blowing device;

500. a blower;

600. and (5) discharging the cabin.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The present embodiment provides an ammonia gas treating device for treating volatilized ammonia gas in an ammonia fuel supply system. Referring to fig. 1 to 2, the ammonia treatment device includes an ammonia collection system 100 and an ammonia concentration adjustment system 200, wherein the ammonia collection system 100 includes a collection vessel 110, an ammonia solution storage 120 and a lightering component 130, a fresh water replenishing valve 111 is disposed on the collection vessel 110 for introducing fresh water into the collection vessel 110, the ammonia volatilized in the ammonia fuel supply system is introduced into the collection vessel 110 through a collection pipe 112 and is mutually dissolved with fresh water in the collection vessel 110 to form ammonia solution, the lightering component 130 is suitable for lightering the ammonia solution into the ammonia solution storage 120 when the ammonia solution in the collection vessel 110 reaches a certain concentration or reaches a certain liquid level, the ammonia concentration adjustment system 200 includes a mixing pipe 210, a liquid ammonia replenishing component 220 and a fresh water replenishing component 230, the mixing pipe 210 is communicated with the ammonia solution storage 120, the ammonia solution in the ammonia solution storage 120 can be introduced into the mixing pipe 210, the liquid ammonia replenishing component 220 is used for introducing liquid ammonia into the ammonia solution in the mixing pipe 210, and the fresh water replenishing component 230 is used for introducing fresh water into the ammonia solution in the mixing pipe 210.

Further, referring to fig. 3, the present embodiment further provides an SCR system, which includes the ammonia treatment device described above, and further includes an SCR reactor 300, where the SCR reactor 300 is communicated with the mixing pipe 210, and the ammonia solution in the mixing pipe 210 is introduced into the SCR reactor 300 after being adjusted to a certain concentration.

In this embodiment, when the ammonia fuel supply system on the ship works, the volatilized ammonia gas can be led into the collection vessel 110 through the collection pipeline 112 and is mutually dissolved with the fresh water in the collection vessel 110 to form ammonia solution, when the ammonia solution in the collection vessel 110 reaches a certain concentration or a certain liquid level, the ammonia solution in the collection vessel 110 is lightered into the ammonia solution storage 120 through the lightering component 130 for storage, so that the ammonia solution can be used by the SCR system on the ship, on one hand, the direct release or leakage of the volatilized ammonia gas into the atmosphere or the ocean can be avoided, and on the other hand, the ammonia gas can be fully used.

In addition, when the ammonia processing device provided in this embodiment is used in an SCR system, when the SCR system works and needs to perform a chemical reaction, the ammonia solution in the ammonia solution storage 120 needs to be used, at this time, the ammonia solution in the ammonia solution storage 120 may be introduced into the mixing pipe 210, the ammonia solution in the mixing pipe 210 may be adjusted by the liquid ammonia supplementing component 220 and the fresh water supplementing component 230, so that the ammonia solution may reach the concentration required for the SCR reaction, and then the ammonia solution after the concentration adjustment is introduced into the SCR reactor 300 for the catalytic reduction reaction, so that the ammonia gas collected previously is used as a reaction substance for reducing the NOx product, so that the exhaust emission of the ship further meets the IMO requirement, and urea consumption is not required, and the consumption of the redundant ammonia solution is reduced, so that the reasonable configuration of resources is further ensured.

In this embodiment, as shown in fig. 1 to 2, the ammonia volatilized in the ammonia fuel supply system is introduced into the collection vessel 110 through the collection pipe 112, and is mutually dissolved with the fresh water in the collection vessel 110 to form an ammonia solution, and the collection vessel 110 is provided with a first concentration sensor 113, and the first concentration sensor 113 is used for measuring the concentration of the ammonia solution in the collection vessel 110. Specifically, the first concentration sensor 113 detects the concentration of the ammonia solution in the collection vessel 110 in real time, and when the concentration of the ammonia solution in the collection vessel 110 reaches 40%, the transfer assembly 130 starts to operate and transfers the ammonia solution to the ammonia solution storage 120 for storage.

In this embodiment, the collecting vessel 110 is provided with a liquid level sensor 114, and the liquid level sensor 114 is used for measuring the liquid level of the ammonia solution in the collecting vessel 110. Specifically, the level sensor 114 detects the level of the ammonia solution in the collection vessel 110 in real time. When the level of the ammonia solution in the collection vessel 110 rises to 95% of the total height of the collection vessel 110, the transfer assembly 130 begins to operate and transfers the ammonia solution to the ammonia solution storage 120 for storage; when the level of the ammonia solution in the collection vessel 110 drops to 65% of the total height of the collection vessel 110, the transfer assembly stops the transfer of the ammonia solution.

It should be noted that when the liquid level in the collection vessel 110 drops to 30% of the total height of the collection vessel 110, the fresh water replenishment valve 111 is opened to replenish fresh water again into the collection vessel 110.

Further, the transfer assembly 130 includes a conduit 131 and a transfer pump 132 disposed on the conduit 131, and both ends of the conduit 131 extend into the collection vessel 110 and the ammonia solution storage 120, respectively. Specifically, when the transfer module 130 operates, the transfer pump 132 is started, and the ammonia solution in the collection vessel 110 is transferred to the ammonia solution storage 120 through the conduit 131 by the transfer pump 132.

In the present embodiment, a supply pipe 140 is disposed between the mixing pipe 210 and the ammonia solution storage 120, for allowing the ammonia solution in the ammonia solution storage 120 to flow into the mixing pipe 210, a third switch valve 141 and a supply pump 142 are disposed on the supply pipe 140, the third switch valve 141 is used for opening and closing the supply pipe 140, and the supply pump 142 is used for pumping the ammonia solution into the supply pipe 140. When the SCR system is operated and the chemical reaction is required, the ammonia solution in the ammonia solution tank 120 is used, and at this time, the third switching valve 141 is opened and the supply pump 142 is operated so that the ammonia solution in the ammonia solution tank 120 can be introduced into the mixing pipe 210 through the supply line 140.

Specifically, during the long-term storage and transportation of the ammonia solution in the ammonia solution storage 120, a small amount of evaporation may occur, so that the ammonia concentration in the ammonia solution may change, and therefore, the ammonia solution needs to be adjusted again after being introduced into the mixing tube 210 from the ammonia solution storage 120, so that the concentration of the ammonia solution in the mixing tube 210 is kept at 40%, and the ammonia solution can meet the standard of the subsequent catalytic reduction reaction.

In this embodiment, the mixing tube 210 is provided with a second concentration sensor 211 for measuring the concentration of the ammonia solution in the mixing tube 210 in real time. When the second concentration sensor 211 detects that the concentration of the ammonia solution in the mixing tube is lower than 40%, the liquid ammonia replenishment module 220 operates and supplies liquid ammonia to the ammonia solution in the mixing tube 210.

Specifically, the liquid ammonia replenishing assembly 220 includes a liquid ammonia replenishing pipe 221 and a first switching valve 222 provided on the liquid ammonia replenishing pipe 221, the liquid ammonia replenishing pipe 221 communicates with the mixing pipe 210 and is used for introducing liquid ammonia into the mixing pipe 210, and the first switching valve 222 is used for switching the liquid ammonia replenishing pipe 221. When the ammonia solution concentration is lower than 40%, the first switching valve 222 is opened, and external liquid ammonia can be introduced into the mixing tube 210 through the liquid ammonia replenishment line 221 to be mixed with the ammonia solution to increase the concentration of the ammonia solution.

Preferably, the liquid ammonia replenishing pipe 221 is further provided with a heating device 223 for heating the liquid ammonia introduced into the liquid ammonia replenishing pipe 221.

When the second concentration sensor 211 detects that the concentration of the ammonia solution in the mixing pipe is higher than 40%, the fresh water replenishment module 230 operates and supplies fresh water to the ammonia solution in the mixing pipe 210. Specifically, the fresh water replenishing assembly 230 includes a fresh water replenishing pipe 231 and a second switching valve 232 provided on the fresh water replenishing pipe 231, the fresh water replenishing pipe 231 communicates with the mixing pipe 210 and is used for introducing fresh water into the mixing pipe 210, and the second switching valve 232 is used for switching the fresh water replenishing pipe 231. When the ammonia solution concentration is higher than 40%, the second switching valve 232 is opened, and external fresh water can be introduced into the mixing pipe 210 through the fresh water supplementing pipe 231 to be mixed with the ammonia solution, so as to reduce the ammonia solution concentration.

In this embodiment, as shown in fig. 3, a delivery channel 240 is provided in communication between the SCR reactor 300 and the mixing pipe 210, and the delivery channel 240 is used to deliver the ammonia solution in the mixing pipe 210 into the SCR reactor 300.

The SCR system further includes a dust removing device 400, and the dust removing device 400 is connected to the SCR reactor 300 and serves to remove dust and foreign substances within the SCR reactor 300. The dust removing device 400 specifically includes an air supply device 410 and a blowing device 420, which are both of the prior art, and are not described herein in detail.

It should be noted that, in addition to the above components, the SCR system provided in this embodiment further includes components such as a fan 500 and a discharge cabin 600, which are all in the prior art, and are not described herein in detail.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. An ammonia gas treating device for treating volatilized ammonia gas in an ammonia fuel supply system, the ammonia gas treating device comprising:

the ammonia gas collecting system (100) comprises a collecting vessel (110), an ammonia solution storage (120) and a lightering component (130), wherein a fresh water supplementing valve (111) is arranged on the collecting vessel (110) and is used for introducing fresh water into the collecting vessel (110), the ammonia gas volatilized in the ammonia fuel supply system is led into the collecting vessel (110) through a collecting pipeline (112) and is mutually dissolved with the fresh water in the collecting vessel (110) to form ammonia solution, and the lightering component (130) is suitable for lightering the ammonia solution into the ammonia solution storage (120) when the ammonia solution in the collecting vessel (110) reaches a certain concentration or reaches a certain liquid level;

ammonia concentration governing system (200), including hybrid tube (210), liquid ammonia replenishment subassembly (220) and fresh water replenishment subassembly (230), hybrid tube (210) with ammonia solution memory (120) intercommunication, ammonia solution in ammonia solution memory (120) can be let in hybrid tube (210), liquid ammonia replenishment subassembly (220) are used for to in hybrid tube (210) ammonia solution lets in liquid ammonia, fresh water replenishment subassembly (230) are used for to in hybrid tube (210) ammonia solution lets in fresh water.

2. An ammonia gas treating device according to claim 1, wherein a first concentration sensor (113) is provided in the collecting vessel (110) for measuring the concentration of the ammonia solution in the collecting vessel (110).

3. Ammonia treatment device according to claim 1, characterized in that the collection dish (110) is provided with a level sensor (114) for measuring the level of the ammonia solution in the collection dish (110).

4. Ammonia gas processing device according to claim 1, wherein the transfer assembly (130) comprises a conduit (131) and a transfer pump (132) arranged on the conduit (131), both ends of the conduit (131) respectively extending into the collection dish (110) and the ammonia solution reservoir (120).

5. An ammonia gas processing device according to claim 1, wherein the liquid ammonia replenishing assembly (220) comprises a liquid ammonia replenishing pipe (221) and a first switching valve (222) provided on the liquid ammonia replenishing pipe (221), the liquid ammonia replenishing pipe (221) is communicated with the mixing pipe (210) and is used for introducing the liquid ammonia into the mixing pipe (210), and the first switching valve (222) is used for switching the liquid ammonia replenishing pipe (221).

6. An ammonia gas processing device according to claim 5, wherein said liquid ammonia replenishing line (221) is further provided with a heating means (223) for heating said liquid ammonia introduced into said liquid ammonia replenishing line (221).

7. Ammonia treatment device according to claim 1, wherein the fresh water replenishing assembly (230) comprises a fresh water replenishing pipe (231) and a second switching valve (232) provided on the fresh water replenishing pipe (231), the fresh water replenishing pipe (231) being in communication with the mixing pipe (210) and being adapted to feed the fresh water into the mixing pipe (210), the second switching valve (232) being adapted to open and close the fresh water replenishing pipe (231).

8. An ammonia gas treating device according to claim 1, wherein the mixing tube (210) is provided with a second concentration sensor (211) for measuring the concentration of the ammonia solution in the mixing tube (210).

9. Ammonia treatment device according to claim 1, characterized in that a supply line (140) is arranged between the mixing pipe (210) and the ammonia solution reservoir (120), and that a third on-off valve (141) and a supply pump (142) are arranged on the supply line (140).

10. An SCR system comprising an ammonia treatment device according to any one of claims 1-9, the SCR system further comprising an SCR reactor (300) in communication with the mixing tube (210), the ammonia solution in the mixing tube (210) being adjusted to a concentration and being introduced into the SCR reactor (300).