Device for absorbing ammonia tail gas

Abstract

The utility model discloses a device for absorbing ammonia tail gas, which comprises an adsorption tank, the adsorption tank is provided with a gas inlet, a gas outlet and a gas outlet, and the gas inlet is respectively communicated with a tail gas pipeline and a nitrogen pipeline through a tee joint; a gas outlet valve is mounted at the gas outlet and is connected with a receiving tank through a condenser; an emptying valve is mounted at the exhaust port; a spiral pipeline is arranged in the adsorption tank, two ends of the spiral pipeline extend out of the adsorption tank and are communicated with an air blower through an air pipe, and a heater is arranged on the air pipe and is positioned at an air outlet of the air blower; the adsorption tank is filled with an adsorbent; and the adsorbent is positioned between the outer wall of the spiral pipeline and the inner wall of the adsorption tank. The spiral pipeline is arranged in the adsorption tank, and the spiral pipeline is connected with the air blower and the heater, so that an adsorbent in the adsorption tank can be heated, and in-situ desorption of ammonia gas is realized; an adsorbent in the adsorption tank can be cooled through the cooler, so that the adsorption efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a device for absorbing ammonia tail gas. Background Art

[0002] In the process of nucleotide biosynthesis, enzymatic deamination is often involved. This reaction process will generate a large amount of ammonia. Due to the limited amount of dissolved ammonia in the reaction system solution and the continuous stirring during the enzyme catalysis process, some ammonia will inevitably volatilize into the air. At the same time, in order to ensure that the pH of the reaction system does not rise sharply, the generated ammonia must be discharged as soon as possible. In order to prevent ammonia from being discharged into the surrounding environment, bringing irritating odors and causing harm to the human body, it is necessary to absorb and treat the ammonia tail gas. At present, the treatment methods of ammonia tail gas mostly use acid absorption or combustion treatment, which not only causes a large amount of ammonia waste, but also further brings new environmental problems.

[0003] Based on the above technical problems, the present application proposes a device for absorbing ammonia tail gas. Utility Model Content

[0004] The purpose of the utility model is to provide a device for absorbing ammonia tail gas to solve the technical problems mentioned in the background technology. The purpose of the utility model is achieved through the following technical solutions:

[0005] A device for absorbing ammonia tail gas comprises an adsorption tank, which is provided with an air inlet, an air outlet and an exhaust port, the air inlet is connected to an exhaust pipe and a nitrogen pipe respectively through a tee, the exhaust pipe is provided with a first air inlet valve, and the nitrogen pipe is provided with a second air inlet valve; an outlet valve is installed at the outlet, and the outlet valve is connected to a receiving tank through a condenser; an exhaust valve is installed at the exhaust port; a spiral pipe is provided in the adsorption tank, both ends of the spiral pipe extend out of the adsorption tank, both ends of the spiral pipe are connected to a blower through an air duct, a heater is provided on the air duct, and the heater is located at the air outlet of the blower; the adsorption tank is filled with an adsorbent, and the adsorbent is located between the outer wall of the spiral pipe and the inner wall of the adsorption tank.

[0006] Furthermore, a cooler is provided on the air duct, the cooler is connected in parallel with the heater, and the cooler and the heater are connected to the blower through a three-way valve.

[0007] Furthermore, the adsorbent is one of activated carbon, zeolite molecular sieve, and metal chloride.

[0008] Furthermore, the receiving tank is connected to a liquid ammonia storage tank via a booster pump.

[0009] Furthermore, a controller is included. A temperature sensor is arranged in the adsorption tank. The temperature sensor, the heater and the cooler are all electrically connected to the controller.

[0010] The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0011] 1. By arranging a spiral pipe in the adsorption tank and connecting the spiral pipe with a blower and a heater, the adsorbent in the adsorption tank can be heated to achieve in-situ desorption of ammonia;

[0012] 2. By connecting a cooler in parallel with the heater, the adsorbent in the adsorption tank can be cooled during the adsorption process to improve the efficiency of adsorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0015] Figure 2 This is a schematic diagram of the structure of the adsorption tank according to an embodiment of the present application.

[0016] Markings in the attached figure: 1. adsorption tank; 11. air inlet; 12. air outlet; 13. exhaust port; 14. adsorbent; 15. first air inlet valve; 16. second air inlet valve; 17. drain valve; 18. air outlet valve; 19. three-way valve; 2. blower; 3. heater; 4. cooler; 5. condenser; 6. receiving tank; 7. booster pump; 8. liquid ammonia storage tank; 9. spiral pipe. DETAILED DESCRIPTION

[0017] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the drawings and specific implementation methods of the specification. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] like Figure 1 , Figure 2The device for absorbing ammonia tail gas shown in the figure comprises an adsorption tank 1, a blower 2, a heater 3, a cooler 4, a condenser 5, a receiving tank 6, a booster pump 7 and a liquid ammonia storage tank 8. The adsorption tank 1 is a tank body made of carbon steel, and an air inlet 11 is provided at the bottom of the adsorption tank 1. The air inlet 11 is connected to the tail gas pipeline and the nitrogen pipeline respectively through a tee. A first air inlet valve 15 is installed on the tail gas pipeline, and a second air inlet valve 16 is installed on the nitrogen pipeline. Both the first air inlet valve 15 and the second air inlet valve 16 are solenoid valves.

[0019] The top of the adsorption tank 1 is provided with an air outlet 12 and an exhaust port 13. An exhaust valve 17 is installed at the exhaust port 13. An outlet valve 18 is installed at the air outlet 12, and the receiving tank 6 is connected to the outlet valve 18 through the condenser 5, and the liquid ammonia storage tank 8 is connected to the receiving tank 6 through the booster pump 7.

[0020] like Figure 1 , Figure 2 As shown, a spiral pipe 9 is vertically installed in the adsorption tank 1, and the two ends of the spiral pipe 9 extend from the upper and lower ends of the adsorption tank 1. The upper end of the spiral pipe 9 is connected to the air inlet of the blower 2 through the air duct, and the air outlet of the blower 2 is respectively connected to the heater 3 and the cooler 4 through the three-way valve 19. The heater 3 and the cooler 4 are connected to the lower end of the spiral pipe 9 through a three-way valve. By switching the three-way valve 19, the heater 3 or the cooler 4 can be connected to the spiral pipe 9 respectively.

[0021] like Figure 2 As shown, the adsorption tank 1 is filled with an adsorbent 14, which is one of activated carbon, zeolite molecular sieve, and metal chloride, and the adsorbent 14 is filled between the outer wall of the spiral pipe 9 and the inner wall of the adsorption tank 1. Preferably, the spiral diameter of the spiral pipe 9 is half the diameter of the adsorption tank 1 to improve the heat transfer efficiency between the spiral pipe 9 and the adsorbent 14.

[0022] As a preferred embodiment of the present application, the ammonia tail gas absorption device of the present application also includes a controller (not shown), and a temperature sensor (not shown) is also installed in the adsorption tank 1. The temperature sensor, heater 3, cooler 4, first air intake valve 15, second air intake valve 16, outlet valve 17, drain valve 18 and three-way valve 19 are all electrically connected to the controller, so that the controller is used to realize automatic switching of the above-mentioned components.

[0023] The working principle of the embodiment of the present application is as follows:

[0024] In the adsorption stage: the first air inlet valve 15 and the exhaust valve 17 are in the open state, the tail gas enters the adsorption tank 1 from the air inlet, the ammonia in the tail gas is adsorbed by the adsorbent 14 in the adsorption tank 1, and the remaining gas is discharged from the exhaust valve 17. At the same time, the three-way valve 19 is switched to connect the cooler 4 with the spiral pipe 9, and the blower 2 is used to send cold air into the spiral pipe 9 to achieve cooling inside the adsorption tank 1 and improve the adsorption efficiency of the adsorbent 14.

[0025] In the desorption stage: the second air inlet valve 16 and the air outlet valve 18 are in the open state, the three-way valve 19 is switched to connect the heater 3 with the spiral pipe 9, and the blower 2 is used to send hot air into the spiral pipe 9 to increase the temperature inside the adsorption tank 1, so that the ammonia is desorbed from the adsorbent 14. At the same time, nitrogen enters the adsorption tank 1 from the air inlet, blows the desorbed ammonia out of the adsorption tank 1, and is cooled by the condenser 5 as liquid ammonia and flows into the receiving tank 6, and finally pumped into the liquid ammonia storage tank 8 by the booster pump 7 for storage, so as to realize the recovery and utilization of ammonia.

[0026] The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0027] 1. By arranging a spiral pipe in the adsorption tank and connecting the spiral pipe with a blower and a heater, the adsorbent in the adsorption tank can be heated to achieve in-situ desorption of ammonia;

[0028] 2. By connecting a cooler in parallel with the heater, the adsorbent in the adsorption tank can be cooled during the adsorption process to improve the efficiency of adsorption.

[0029] It should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0030] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for absorbing ammonia tail gas, characterized in that: It includes an adsorption tank, which is provided with an air inlet, an air outlet and an exhaust port, the air inlet is connected with the tail gas pipeline and the nitrogen pipeline respectively through a tee, the tail gas pipeline is provided with a first air inlet valve, and the nitrogen pipeline is provided with a second air inlet valve; an outlet valve is installed at the outlet, and the outlet valve is connected with a receiving tank through a condenser; an emptying valve is installed at the exhaust port; a spiral pipe is provided in the adsorption tank, and both ends of the spiral pipe extend out of the adsorption tank, and both ends of the spiral pipe are connected with a blower through an air duct, and a heater is provided on the air duct, and the heater is located at the air outlet of the blower; the adsorption tank is filled with an adsorbent, and the adsorbent is located between the outer wall of the spiral pipe and the inner wall of the adsorption tank.

2. The device for absorbing ammonia tail gas according to claim 1, characterized in that: A cooler is arranged on the air duct, the cooler is connected in parallel with the heater, and the cooler and the heater are connected with the blower through a three-way valve.

3. The device for absorbing ammonia tail gas according to claim 1, characterized in that: The adsorbent is one of activated carbon, zeolite molecular sieve and metal chloride.

4. The device for absorbing ammonia tail gas according to claim 1, characterized in that: The receiving tank is connected to a liquid ammonia storage tank via a booster pump.

5. The device for absorbing ammonia tail gas according to claim 2, characterized in that: The system further comprises a controller. A temperature sensor is arranged in the adsorption tank. The temperature sensor, the heater and the cooler are all electrically connected to the controller.

Images