CN217209393U

CN217209393U - Device for preventing ammonia torch from spraying ammonia

Info

Publication number: CN217209393U
Application number: CN202220104293.8U
Authority: CN
Inventors: 于跃波; 周瑞; 章秀娟
Original assignee: Anhui Liuguo Chemical Industry Co Ltd
Current assignee: Anhui Liuguo Chemical Industry Co Ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-08-16
Anticipated expiration: 2032-01-14

Abstract

The utility model belongs to the technical field of chemical industry equipment, especially, prevent device of ammonia torch ammonia injection. The utility model comprises a system ammonia discharge pipeline, a blow-down tank, an ammonia torch pipeline which are connected in sequence, and also comprises a low-pressure nitrogen pipeline and a steam pipeline for heating the low-pressure nitrogen pipeline, wherein the low-pressure nitrogen pipeline is connected with the blow-down tank through a heat exchange device, and the steam pipeline is connected with the heat exchange device; a temperature detection device is arranged on the ammonia torch pipeline. The utility model discloses a temperature in the temperature sensor monitoring ammonia torch pipeline, control vapor heats low pressure nitrogen gas in the heat exchanger for the liquid ammonia air stripping has been accelerated after the low pressure nitrogen gas after the heating enters into the blowdown jar, effectively prevents that system's ammonia exhaust from bringing liquid ammonia into the torch to the torch combustion process in, causes the unable burning of torch, and the torch mouth spouts the condition of ammonia.

Description

Device for preventing ammonia torch from spraying ammonia

Technical Field

The utility model belongs to the technical field of chemical industry equipment, especially, relate to a prevent that ammonia torch from spouting device of ammonia.

Background

The existing blow-down tank device mainly discharges liquid ammonia into the blow-down tank, then uses low-pressure nitrogen and low-pressure steam to heat and strip the liquid ammonia discharged to the blow-down tank by the system, and then sends the stripped gas ammonia to an ammonia torch for combustion, thereby achieving the purpose of safe discharge.

Because during the maintenance, the cold ware of each ammonia discharges to blowdown jar the liquid ammonia volume great and low-pressure steam heat low pressure nitrogen gas in the blowdown jar after liquefaction stays in the blowdown jar for water, water and liquid ammonia mix the back in the blowdown jar, cause the liquid level in the blowdown jar too high easily to lead to part not gas-lifted liquid ammonia and water to be brought to the ammonia torch pipeline by gas ammonia in, cause the ammonia torch pipeline to freeze, the torch burner port easily spouts the ammonia, thereby causes the safety ring to protect accident.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides a device for preventing ammonia torch from spraying ammonia. The utility model discloses can avoid liquid ammonia to enter into ammonia torch pipeline.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a device for preventing ammonia torch from spraying ammonia comprises a system ammonia discharge pipeline, a blowdown tank, an ammonia torch pipeline, a low-pressure nitrogen pipeline and a steam pipeline for heating the low-pressure nitrogen pipeline, wherein the system ammonia discharge pipeline, the blowdown tank and the ammonia torch pipeline are sequentially connected; a temperature detection device is arranged on the ammonia torch pipeline.

Preferably, the low-pressure nitrogen pipeline is connected with the tube side of the heat exchange device, the steam pipeline is connected with the shell side of the heat exchange device, and the shell side of the heat exchange device is also provided with a water drainage pipeline.

Preferably, a steam control valve with the control pressure of 0.5MPa is arranged on the steam pipeline, and a steam drain valve with the control pressure of 0.5MPa is arranged on the drain pipeline; the steam control valve and the steam drain valve are in signal connection with the temperature detection device.

Preferably, the low-pressure nitrogen pipeline is provided with a low-pressure nitrogen valve.

Preferably, the heat exchange device is a heat exchanger, and the temperature detection device is a temperature sensor.

The utility model has the advantages of:

the utility model monitors the temperature in the ammonia torch pipeline through the temperature sensor, controls the vapor to heat the low-pressure nitrogen in the heat exchanger, accelerates the gas stripping of the liquid ammonia after the heated low-pressure nitrogen enters the blow-down tank, and effectively prevents the condition that the system discharges ammonia and brings the liquid ammonia into the torch in the torch combustion process, so that the torch can not be combusted, and the torch mouth sprays ammonia; meanwhile, the condition that liquid ammonia is easier to enter an ammonia torch pipeline due to the fact that traditional water vapor heats low-pressure nitrogen in a sewage discharge tank and the liquid level of the high sewage discharge tank is left in the sewage discharge tank after the water vapor is liquefied is avoided, and the condition that the gas lift is not in place and the discharged water contains ammonia due to the fact that gas lift is re-dissolved in the water after the water vapor is liquefied is avoided.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The notations in the figures have the following meanings:

1-system ammonia discharge pipeline, 2-blowdown tank, 3-ammonia flare pipeline, 4-low pressure nitrogen pipeline, 5-steam pipeline, 6-drainage pipeline, 7-heat exchange device and 8-temperature detection device.

Detailed Description

As shown in fig. 1, a device for preventing ammonia flare from spraying ammonia comprises a system ammonia discharge pipeline 1, a blow-down tank 2, an ammonia flare pipeline 3, a low-pressure nitrogen pipeline 4 and a steam pipeline 5 for heating the low-pressure nitrogen pipeline 4, wherein the low-pressure nitrogen pipeline 4 is connected with the blow-down tank 2 through a heat exchange device 7, and the steam pipeline 5 is connected with the heat exchange device 7; the ammonia flare line 3 is provided with a temperature detection device 8.

The low-pressure nitrogen pipeline 4 is connected with the tube side of the heat exchange device 7, the steam pipeline 5 is connected with the shell side of the heat exchange device 7, and a water drainage pipeline 6 is further arranged on the shell side of the heat exchange device 7. A steam control valve with the control pressure of 0.5MPa is arranged on the steam pipeline 5, and a steam drain valve with the control pressure of 0.5MPa is arranged on the drain pipeline 6; the steam control valve and the steam drain valve are in signal connection with the temperature detection device 8. The low-pressure nitrogen pipeline 4 is provided with a low-pressure nitrogen valve.

Specifically, the heat exchange device 7 is a heat exchanger, the temperature detection device 8 is a temperature sensor, and the temperature sensor is connected with the central control room.

The operation of the device is described in detail below with reference to the drawings in the examples.

During operation, liquid ammonia from the system ammonia discharge pipeline 1 enters the blowdown tank 2, meanwhile, nitrogen in the low-pressure nitrogen pipeline 4 enters the blowdown tank 2 through the tube pass of the heat exchange device 7 by opening a low-pressure nitrogen valve on the low-pressure nitrogen pipeline 4, and the liquid ammonia entering the blowdown tank 2 is subjected to gas stripping (gas stripping is a physical process and adopts a gas medium to destroy the original gas-liquid two-phase balance to establish a new gas-liquid balance state, so that a certain component in the solution is desorbed due to reduced partial pressure, and the purpose of separating substances is achieved, namely, the low-pressure nitrogen added into the blowdown tank 2 in the scheme can carry out gas stripping on the liquid ammonia so that the liquid ammonia is subjected to gas stripping, and the gas ammonia enters a flare through the ammonia flare pipeline 3 to be combusted. And too high in blowdown jar 2 liquid level, when resulting in liquid ammonia to get into ammonia torch pipeline 3 in, temperature sensor detects 3 temperature reductions of ammonia torch pipeline, temperature sensor passes through signal interlock control steam control valve and steam drain valve and opens, make the shell side that vapor in the steam pipeline 5 entered into the heat exchanger heat the nitrogen gas in the low pressure nitrogen pipeline 4, nitrogen gas after the heating enters into blowdown jar 2 can accelerate the air stripping speed, the condition of remaining the liquid level that increases blowdown jar 2 in blowdown jar 2 and dissolved gas ammonia after having avoided traditional vapor condensation simultaneously, prevent that liquid ammonia from continuously getting into torch ammonia pipeline 3, avoid ammonia torch mouth to spout the ammonia, discharge from drain pipe 6 after the vapor liquefaction.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. The device for preventing ammonia spraying of the ammonia torch comprises a system ammonia exhaust pipeline (1), a blowdown tank (2) and an ammonia torch pipeline (3) which are sequentially connected, and is characterized by further comprising a low-pressure nitrogen pipeline (4) and a steam pipeline (5) for heating the low-pressure nitrogen pipeline (4), wherein the low-pressure nitrogen pipeline (4) is connected with the blowdown tank (2) through a heat exchange device (7), and the steam pipeline (5) is connected with the heat exchange device (7); and a temperature detection device (8) is arranged on the ammonia flare pipeline (3).

2. The device for preventing ammonia flare from spraying ammonia according to claim 1, which is characterized in that: the low-pressure nitrogen pipeline (4) is connected with the tube side of the heat exchange device (7), the steam pipeline (5) is connected with the shell side of the heat exchange device (7), and a drainage pipeline (6) is further arranged on the shell side of the heat exchange device (7).

3. The device for preventing ammonia flare from spraying ammonia according to claim 2, wherein: a steam control valve with the control pressure of 0.5MPa is arranged on the steam pipeline (5), and a steam drain valve with the control pressure of 0.5MPa is arranged on the drain pipeline (6); the steam control valve and the steam drain valve are in signal connection with the temperature detection device (8).

4. The device for preventing ammonia flare from spraying ammonia according to claim 1, which is characterized in that: and a low-pressure nitrogen valve is arranged on the low-pressure nitrogen pipeline (4).

5. The device for preventing ammonia flare from spraying ammonia according to claim 1, which is characterized in that: the heat exchange device (7) is a heat exchanger, and the temperature detection device (8) is a temperature sensor.