CN111569852A - An efficient heat transfer activated coke desulfurization, denitration and desorption device - Google Patents

Abstract

The invention relates to an activated coke desulfurization and denitration desorption device with high efficiency in heat transfer, comprising a conveying unit, a desorption unit, a cooling unit and a gas unit integrated in a device body; the conveying unit is composed of a feed air lock valve, a distributor, a bottom collector and a discharge air lock valve; the desorption unit is composed of a hot air inlet, a partition heater and a hot air outlet; the cooling unit is composed of a cold air inlet, a partition cooler and a cold air outlet; the gas unit is composed of a nitrogen inlet, an automatic valve, an emergency protection gas nozzle and a tail gas outlet; the device of the invention can realize high efficiency in heat transfer in activated coke desorption while ensuring the safety and stability of the desorption process, and the device has a compact structure and good safety.

Description

An efficient heat transfer activated coke desulfurization, denitration and desorption device

technical field

The invention relates to the technical field of activated coke flue gas purification, in particular to an activated coke desulfurization, denitration and desorption device with efficient heat transfer.

Background technique

Activated coke desulfurization and denitration flue gas purification technology has the advantages of high-efficiency desulfurization and simultaneous recovery of sulfur resources, low-temperature denitrification without heating, no secondary pollution such as waste solids and wastewater, etc. There is a certain range of promotion and application.

In the activated coke desulfurization and denitration flue gas purification technology, the desorption device heats the activated coke through high temperature flue gas to activate and regenerate it, and the sulfuric acid adsorbed by the activated coke will react with the activated coke to generate SO ₂ gas, and the reaction temperature can reach 400 ℃ in the process ℃, the temperature range of activated coke combustion has been reached, so the desorption process must be carried out under the condition of isolating oxygen. How to improve the heat transfer coefficient of activated coke desorption heating and cooling process under the premise of ensuring safety is the focus and difficulty of activated coke desorption. .

SUMMARY OF THE INVENTION

The invention provides an active coke desulfurization, denitrification and desorption device with high efficiency heat transfer, which can ensure the safety and stability of the desorption process while realizing the high efficiency heat transfer by the active coke desorption, and has a compact structure and good safety.

In order to achieve the above object, the present invention adopts the following technical solutions to realize:

An efficient heat transfer activated coke desulfurization, denitration and desorption device, comprising a conveying unit, a desorption unit, a cooling unit and a gas unit integrated in the device body; the conveying unit is composed of a feed air lock valve, a distributor, and a bottom collector. The desorption unit consists of a hot air inlet, a partition heater and a hot air outlet; the cooling unit consists of a cold air inlet, a partition cooler and a cold air outlet; the gas unit consists of a nitrogen inlet, an automatic valve , emergency protective gas nozzle and tail gas outlet; the top of the device body is provided with an active coke inlet, which is connected to the bottom end of the active coke input pipeline, the top of the active coke input pipeline is connected to the feed air lock valve, and the active coke inlet is below the active coke inlet. The device body is provided with a distributor; the discharge ports of the distributor are respectively connected with the top inlets of the plurality of heater heat exchange tubes in the partition heater, and the bottom outlets of the heater heat exchange tubes are connected with the middle buffer section of the device body; The bottom of the shell of the partition heater is provided with a hot air inlet, and the top of the shell of the partition heater is provided with a hot air outlet; the top inlets of the plurality of cooler heat exchange tubes in the partition cooler are connected to the middle buffer section of the device body, and the cooler heat exchange tubes are connected. The bottom outlet of the device is connected to the collector, the collector is connected to the active coke output pipeline, and the bottom end of the active coke output pipeline is connected to the discharge air lock valve; the middle buffer section of the device body is provided with an emergency protective gas nozzle, corresponding to The device body at the bottom of the cooling unit is provided with a nitrogen inlet, and the emergency protective gas nozzle and the nitrogen inlet are respectively connected to a nitrogen pipeline. The nitrogen pipeline connected with the emergency protective gas nozzle is provided with an automatic valve; the top of the device body is provided with a tail gas outlet.

The device body is equipped with a temperature detection device, and the temperature detection device is interlocked and controlled with an automatic valve through a control system.

The automatic valve is an electric quick-opening valve or a pneumatic quick-opening valve.

The outer surface of the device body is provided with a thermal insulation layer.

The feed air lock valve and the discharge air lock valve are sealed with inert gas and can adjust the discharge amount; the feed air lock valve and the discharge air lock valve are interlocked and controlled by the control system and the temperature detection device respectively.

The shell side of the partition heater is provided with fins and baffles, and the shell side of the partition cooler is provided with fins and baffles, and the baffles in different shell sides are along the height of the partition heater or partition cooler. To staggered settings.

There are multiple emergency protective gas nozzles, which are evenly arranged along the circumferential direction of the device body.

Compared with the prior art, the beneficial effects of the present invention are:

1) The device has a compact structure, is easy to operate, and saves materials and floor space;

2) The partition heater and partition cooler are equipped with baffles and fins, which have good heat exchange effect, strong desorption capacity and energy saving;

3) In the event of an accident, the device can be quickly filled with nitrogen to protect the device, which is safe and ensures the normal operation of the device.

Description of drawings

FIG. 1 is a schematic structural diagram of an efficient heat transfer activated coke desulfurization, denitration and desorption device according to the present invention.

In the figure: 1. Conveying unit 1-1. Feed air lock valve 1-2. Distributor 1-3. Collector 1-4. Discharge air lock valve 2. Desorption unit 2-1. Hot air inlet 2- 2. Baffle plate 2-3. Partition heater 2-4. Hot air outlet 3. Cooling unit 3-1. Cold air inlet 3-2. Baffle plate 3-3. Partition cooler 3-4. Cold air outlet 4. Gas unit 4-1. Nitrogen inlet 4-2. Automatic valve 4-3. Emergency protective gas nozzle 4-4. Exhaust gas outlet

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

As shown in FIG. 1, an efficient heat transfer activated coke desulfurization, denitration and desorption device according to the present invention includes a conveying unit 1, a desorption unit 2, a cooling unit 3 and a gas unit 4 integrated in the device body; the conveying unit 1 is composed of a feed air lock valve 1-1, a distributor 1-2, a bottom collector 1-3 and a discharge air lock valve 1-4; the desorption unit 2 is composed of a hot air inlet 2-1, a partition heater 2-3 and a hot air outlet 2-4; the cooling unit 3 is composed of a cold air inlet 3-1, a partition cooler 3-3 and a cold air outlet 3-4; the gas unit 4 is composed of a nitrogen inlet 4-1, an automatic The valve 4-2, the emergency protective gas nozzle 4-3 and the tail gas outlet 4-4 are composed; the top of the device body is provided with an active coke inlet, which is connected to the bottom end of the active coke input pipeline, and the top of the active coke input pipeline is connected to the inlet. Material lock air valve 1-1, a distributor 1-2 is installed in the device body below the active coke inlet; the discharge port of the distributor 1-2 is respectively connected with the plurality of heater heat exchange tubes in the partition heater 2-3 The top inlet of the heater heat exchange tube is connected to the middle buffer section of the device body; the bottom of the shell of the partition heater 2-3 is set with a hot air inlet 2-1, and the top of the shell of the partition heater 2-3 is set The hot air outlet 2-4; the top inlets of the plurality of cooler heat exchange tubes in the partition cooler 3-3 are connected to the middle buffer section of the device body, and the bottom outlet of the cooler heat exchange tubes is connected to the collector 1-3. The feeder 1-3 is connected with the active coke output pipeline, and the bottom end of the active coke output pipeline is connected with the discharge air lock valve 1-4; the middle buffer section of the device body is provided with an emergency protective gas nozzle 4-3, corresponding to cooling The device body at the bottom of unit 3 is provided with a nitrogen inlet 4-1, the emergency protective gas nozzle 4-3 and the nitrogen inlet 4-1 are respectively connected with nitrogen pipes, and the nitrogen pipe connected with the emergency protective gas nozzle is provided with an automatic valve 4- 2; The top of the device body is provided with an exhaust gas outlet 4-4.

The device body is equipped with a temperature detection device, and the temperature detection device is interlocked and controlled with the automatic valve 4-2 through the control system.

The automatic valve 4-2 is an electric quick-opening valve or a pneumatic quick-opening valve.

The outer surface of the device body is provided with a thermal insulation layer.

The feed air lock valve 1-1 and the discharge air lock valve 1-4 are sealed with inert gas and can adjust the discharge amount; the feed air lock valve 1-1 and the discharge air lock valve 1-4 are respectively The control system is interlocked with the temperature detection device.

The shell side of the partition heater 2-3 is provided with fins and a baffle plate 2-2, and the shell side of the partition cooler 3-3 is provided with fins and a baffle plate 3-2. The air plates 2-2 and 3-2 are arranged staggered along the height direction of the partition wall heater 2-3 or the partition wall cooler 3-3.

There are multiple emergency protective gas nozzles 4-3, which are evenly arranged along the circumferential direction of the device body.

When the granular activated coke is desorbed, the activated coke is first transported into the device body by the feed air lock valve 1-1 at the top of the device, and then evenly enters the desorption unit 2 through the distributor 1-2, and the activated coke is in the partition heater. 2-3 In the inner tube, it exchanges heat with the hot air in the shell, and the temperature rises to above 400 °C. Because the baffle plate 2-2 and the fins are arranged in the shell side of the partition wall heater 2-3, the hot air flows back and forth in the shell side of the partition wall heater 2-3, with strong turbulence and good heat exchange effect; The sulfuric _acid adsorbed by the activated coke will react with the activated coke to generate SO2 gas. During normal operation, the automatic valve 4-2 in the gas unit 4 is closed, and the carrier gas entered from the nitrogen inlet 4-1 first flows upward through the cooling unit 3, and the desorption process including SO ₂ , CO and CO ₂ etc. The tail gas is carried by the tail gas outlet 4-4 through the desorption unit 2 and discharged for further processing; after the activated coke is desorbed and desorbed by high temperature, it enters the buffer section in the middle of the device, and then enters the lower cooling unit 3. The active coke travels through the tube side in the partition cooler 3-3, and exchanges heat with the cold air on the shell side, and the temperature drops to about 120 °C. The rib, the cold air flows back and forth in the shell side of the partition cooler 3-3, the turbulence is strong, and the heat exchange effect is good; the cooled active coke enters the accumulator 1-3 of the conveying unit, and then passes through the discharge lock. Gas valves 1-4 are discharged out of the device and put into the flue gas purification system.

When the temperature sensor installed in the device body detects that the internal temperature of the device continues to rise and exceeds the alarm temperature, the feed air lock valve 1-1 is closed, the discharge air lock valve 1-4 is discharged at full speed, and the automatic The valve 4-2 is opened, and a large amount of nitrogen enters the middle buffer section through the emergency protective gas nozzle 4-3, and the device is quickly filled with nitrogen for protection.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (7)

1. an active coke desulfurization, denitration and desorption device for efficient heat transfer, is characterized in that, comprising conveying unit, desorption unit, cooling unit and gas unit integrated in the device body; The desorption unit is composed of a hot air inlet, a partition heater and a hot air outlet; the cooling unit is composed of a cold air inlet, a partition cooler and a cold air outlet; the gas unit It is composed of a nitrogen inlet, an automatic valve, an emergency protective gas nozzle and an exhaust gas outlet; the top of the device body is provided with an active coke inlet, which is connected to the bottom end of the active coke input pipeline, and the top of the active coke input pipeline is connected to the feed lock valve. , the device body below the active coke inlet is equipped with a distributor; the discharge ports of the distributor are respectively connected with the top inlets of the plurality of heater heat exchange tubes in the partition heater, and the bottom outlet of the heater heat exchange tubes is connected to the device body. The middle buffer section of the partition heater is connected; the bottom of the shell of the partition heater is provided with a hot air inlet, and the top of the shell of the partition heater is provided with a hot air outlet; the top inlets of the heat exchange tubes of the multiple coolers in the partition cooler are connected to the middle buffer section of the device body , the bottom outlet of the heat exchange tube of the cooler is connected to the collector, the collector is connected to the active coke output pipeline, and the bottom end of the active coke output pipeline is connected to the discharge air lock valve; the middle buffer section of the device body is provided with an emergency The protective gas nozzle corresponds to a nitrogen inlet on the device body at the bottom of the cooling unit. The emergency protective gas nozzle and the nitrogen inlet are respectively connected to the nitrogen pipeline, and the nitrogen pipeline connected with the emergency protective gas nozzle is provided with an automatic valve; the top of the device body Set up exhaust outlet. 2 . The high-efficiency heat-transfer activated coke desulfurization, denitration and desorption device according to claim 1 , wherein a temperature detection device is installed in the device body, and the temperature detection device is interlocked with an automatic valve through a control system. 3 . 3. A kind of high-efficiency heat transfer activated coke desulfurization, denitration and desorption device according to claim 1 or 2, wherein the automatic valve is an electric quick-opening valve or a pneumatic quick-opening valve. 4. A high-efficiency heat-transfer activated coke desulfurization, denitration and desorption device according to claim 1 or 2, characterized in that, a thermal insulation layer is provided on the outer surface of the device body. 5. The active coke desulfurization, denitration and desorption device of a kind of efficient heat transfer according to claim 1, characterized in that, the feed air lock valve and the discharge air lock valve are all sealed with inert gas, and can adjust the discharge The feed air lock valve and the discharge air lock valve are interlocked and controlled by the control system and the temperature detection device respectively. 6. A kind of active coke desulfurization, denitration and desorption device for efficient heat transfer according to claim 1, characterized in that, fins and baffles are arranged in the shell side of the partition wall heater, and in the shell side of the partition wall cooler Ribs and baffles are provided, and the baffles in different shells are staggered along the height of the partition heater or partition cooler. 7 . The high-efficiency heat transfer activated coke desulfurization, denitration and desorption device according to claim 1 , wherein the emergency protective gas nozzles are multiple, and are evenly arranged along the circumferential direction of the device body. 8 .

Images