High-yield and high-efficiency activated carbon activation device and activation process

Abstract

The present invention discloses a high-yield and high-efficiency activated carbon activation device and activation process. The activation device includes a furnace body, a heat storage chamber and a steam boiler. The inner flue of the furnace body is divided into an upper near flue, an upper far flue, a lower near flue and a lower far flue by a cover brick. The upper near flue, the upper far flue, the lower near flue and the lower far flue are respectively provided with a second air distribution port, and the second air distribution port includes an upper air distribution port and a lower air distribution port. Air distribution control valves are respectively provided on the upper air distribution port and the lower air distribution port. The activation process is: adding carbonized material to a feeding tank, the carbonized material is activated in the activation tank from top to bottom through a feeding preheating section, a supplementary carbonization section, an activation section and a discharging cooling section, and the finally cooled activated material is output through a discharging bin. By optimizing the design of the activated carbon activation device, the activation process breaks through the traditional temperature limit, improves the activated carbon activation rate, improves the operating efficiency of the activation waste heat boiler, and achieves a balance between the steam consumed by the activation furnace and the steam produced by the waste heat of the tail gas.

Description

Technical Field

[0001] The invention relates to the technical field of coal-based activated carbon production, and in particular to a high-yield and high-efficiency activated carbon activation device and an activation process. Background Art

[0002] The Slep activation furnace is a brick-structured saddle-type activation furnace imported from abroad. It uses the activation method of water vapor and flue gas exchange, and is suitable for the production of various granular activated carbons. The activation process conditions are stable, the product quality is uniform, and the adsorption performance is good. It has a very unique advantage, especially in the production of high-quality activated carbon.

[0003] The steam power required for traditional activated carbon production is produced by using coal-fired steam boilers or gas-fired steam boilers. With the limited use of power energy and the continued rise in prices, especially the continuous improvement of environmental protection requirements and the strict restrictions on product energy consumption, the defects of high energy consumption, low efficiency and high pollution under traditional facilities are becoming increasingly prominent. Therefore, the recycling of waste heat from activated tail gas and carbonized tail gas has become the preferred approach for activated carbon production companies, that is, the activated (carbonized) tail gas is purified and burned through an incinerator and drives the activated (carbonized) waste heat boiler to generate steam for use in activated carbon production.

[0004] However, in actual production, due to the low output of the traditional activation process, the amount of steam produced by the activated tail gas driven by the waste heat boiler cannot meet the amount of steam consumed by the activation furnace. The insufficient steam can only be supplemented by the carbonization waste heat boiler or an external steam source, resulting in high activated carbon production costs and poor overall operating efficiency. One of the main reasons for the low gas output and poor operating effect of the activated waste heat boiler is that the activation rate of the activation furnace is affected by the activation temperature under traditional process conditions. Low temperature leads to low activation rate, which also leads to low output, and the amount of activated material added is also reduced. The amount of activated tail gas is limited to the output and the thermal enthalpy value of the tail gas, which ultimately affects the amount of steam generated, forming a cycle that cannot be self-sufficient. Therefore, in order to improve the operating efficiency of the activated waste heat boiler and achieve a balance between the steam consumed by the activation furnace and the steam produced by the tail gas waste heat, it is necessary to break the original traditional process and break through the limit of the traditional activation temperature of the activation furnace.

[0005] However, while increasing the temperature to improve the efficiency of the activation furnace, high temperature will increase the burden on the activation furnace. Local high temperature of the furnace core bricks can easily lead to product channel blockage, burning of furnace core bricks and other serious accidents of the furnace body. It is also easy to cause the problem of increased carbon loss rate. Therefore, the original structure and process control of the activation furnace are the main reasons that restrict the increase of the activation process temperature. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a high-yield and high-efficiency activated carbon activation device and activation process. By redesigning the structure of the activated carbon activation device, the activation process breaks through the temperature limit, increases the activated carbon activation rate, improves the operating efficiency of the activation waste heat boiler, and achieves a balance between the steam consumed by the activation furnace and the steam produced by the exhaust gas waste heat.

[0007] A high-yield and high-efficiency activated carbon activation device comprises a furnace body, a heat storage chamber and a steam boiler, wherein:

[0008] The furnace body includes a furnace wall, a furnace chamber is formed inside the furnace wall, a side flue is arranged inside the furnace wall, and the furnace body is divided into a left half furnace a and a right half furnace b by a partition wall in the middle of the furnace chamber, and the lower parts of the left half furnace a and the right half furnace b are connected through a lower connecting flue and are provided with a first air distribution port, and a furnace core is respectively arranged in the left half furnace a and the right half furnace b; a plurality of mutually unconnected activation tanks are arranged in the furnace core, and a feeding tank is arranged at the top of each activation tank, and a discharge bin is arranged at the bottom of the activation tank; the side flue is divided into an upper near flue, an upper far flue, a lower near flue and a lower far flue by a cover brick, and the upper near flue, the upper far flue, the lower near flue and the lower far flue are respectively provided with a second air distribution port, and the second air distribution port includes an upper air distribution port and a lower air distribution port, and valves are respectively arranged on the upper air distribution port and the lower air distribution port;

[0009] The regenerator comprises a left regenerator and a right regenerator, the left regenerator is connected to the left half furnace a through an upper flue, and the right regenerator is connected to the right half furnace b through an upper flue;

[0010] The steam boiler comprises a combustion chamber and a steam chamber. The left heat storage chamber and the right heat storage chamber are connected to the combustion chamber through a flue gas pipe, respectively. The left heat storage chamber and the right heat storage chamber are connected to the steam chamber through a steam pipe, respectively. Solenoid valves are provided on the flue gas pipe and the steam pipe.

[0011] Preferably, the left half furnace a and the right half furnace b are evenly divided into four sections from top to bottom, namely, the charging preheating section, the supplementary carbonization section, the activation section and the discharge cooling section. The number of brick layers in the activation section is appropriately increased.

[0012] Preferably, the furnace wall comprises an outer wall and an inner wall, the outer wall is built with red bricks, the inner wall is built with refractory clay bricks, and the space between the inner wall and the outer wall is filled with aluminum silicate fiber felt for thermal insulation; the isolation wall is built with refractory clay bricks; and the furnace core is built with special-shaped refractory clay bricks.

[0013] Preferably, the heat storage chamber is built with refractory bricks, and a heat storage grid made of stacked refractory bricks is arranged in the heat storage chamber cavity, and an activator channel is provided.

[0014] Preferably, the left half furnace and the right half furnace are respectively provided with tail gas reinjection devices, the tail gas reinjection devices are arranged on the side where the activating agent is introduced, and the tail gas reinjection devices are connected to the lower flue.

[0015] A high-yield and high-efficiency activated carbon activation process, wherein the carbonized material is added to a feeding tank, and the carbonized material is activated in the activation tank from top to bottom through a feeding preheating section, a supplementary carbonization section, an activation section, and a discharge cooling section, and the finally cooled activated material is discharged through a discharge bin. The activation treatment steps are as follows:

[0016] (1) First, the left half furnace is used as the activation half furnace and the right half furnace is used as the heating half furnace. The steam pipe of the left regenerator, the smoke pipe of the right regenerator, the air distribution valve of the right half furnace and the inlet valve of the tail gas reinjection device of the left half furnace are opened. The smoke pipe of the left regenerator, the steam pipe of the right regenerator, the air distribution valve of the left half furnace and the inlet valve of the tail gas reinjection device of the right half furnace are closed. The preheated water vapor in the steam chamber or the sub-cylinder enters the left regenerator from the steam pipe. After the steam pressure entering the furnace is stable, the valve of the tail gas reinjection device on the left side can be opened according to the furnace pressure. Hot water vapor and part of the activated tail gas are heated in the left regenerator to form superheated mixed steam, and then the superheated mixed steam enters the left half furnace through the upper flue, and the superheated mixed steam reacts with the carbon material in the left half furnace to activate the activated gas through the bottom of the left half furnace into the lower flue, and then enters the right half furnace from the bottom, oxygen is introduced into the flue air distribution port of the right half furnace to assist combustion, and part of the flue gas is burned to heat the right half furnace, and the remaining activated gas medium enters the right regenerator from the upper flue, and then enters the combustion chamber for combustion, and is finally discharged from the chimney;

[0017] (2) After 30 minutes, the activation furnace is switched, with the right half furnace as the activation half furnace and the left half furnace as the heating half furnace. The steam pipe of the right regenerator, the flue gas pipe of the left regenerator, the air distribution valve of the left half furnace and the inlet valve of the exhaust gas reinjection device of the right half furnace are opened. The flue gas pipe of the right regenerator, the steam pipe of the left regenerator, the air distribution valve of the right half furnace and the inlet valve of the exhaust gas reinjection device of the right half furnace are closed. The preheated steam in the steam chamber or the steam cylinder enters the right regenerator from the steam pipe. After the steam pressure entering the furnace is stable, the right exhaust gas can be opened according to the furnace pressure. Valve of the reinjection device; preheated water vapor and part of the activated tail gas are heated in the right regenerator to form superheated mixed steam, and then the superheated mixed steam enters the right half furnace through the upper flue, and the superheated mixed steam reacts with the carbonized material in the right half furnace for activation, and the activated gas enters the lower flue through the bottom of the right half furnace, and then enters the left half furnace from the bottom, at this time, oxygen is introduced into the air distribution port of the left half furnace to assist combustion, and part of the flue gas is burned to heat up the left half furnace, and the remaining activated gas medium enters the left regenerator from the upper flue, and then enters the combustion chamber for combustion, and finally discharged from the chimney;

[0018] The heat energy generated by combustion in the combustion chamber is used to produce steam through heat exchange in the steam waste heat boiler and then reused in production;

[0019] (3) After 30 minutes, the activation furnace is switched to another phase and the operations of steps (1) and (2) are repeated.

[0020] Preferably, the superheated steam temperature is 950-1100°C, and the steam pressure entering the furnace is 3.0-3.5 kg / cm 2 The furnace pressure of the activation half furnace is 100-120Pa, and the furnace pressure of the heating half furnace is 70-100Pa; the flue draft is -150Pa. When executing the above process parameters, in order to avoid furnace accidents, the air outlet valve on the flue of the heating half furnace should be closed.

[0021] Functions of each part of the activation device. Preheating section: The activation preheating section is used to slowly heat up the carbonized material put into the furnace to prevent the sudden increase in temperature from causing the volatile components and prestress in the carbonized material to be quickly released and causing the surface of the carbonized material to burst. Sufficient carbonized material should be loaded into the preheating section to prevent the flue gas in the furnace from moving upward; Supplementary carbonization section: It is used to analyze the excess volatile components in the carbonized material. At this time, the carbonized material is not in direct contact with the activator. The high-temperature airflow heats the special-shaped bricks and radiates the heat to the carbonized material to achieve the purpose of supplementary carbonization; Activation section: The carbonized material after supplementary carbonization falls to the activation section along the product channel and directly contacts the activator. The activator diffuses and penetrates into the carbon layer through the air channel, and a series of redox chemical reactions occur with the carbon to open up the original voids of the carbon. The carbon forms a developed pore structure and a huge specific surface area; Cooling section: The activated carbon material is no longer in contact with the furnace gas, and enters the stage of gradual cooling of the carbon material. Avoid the carbon material discharged from the furnace from continuing to react with oxygen in the air at high temperature or causing combustion, which will affect the quality of the carbon and the activation rate; Regenerator: The regenerator further heats and raises the temperature of the water vapor entering the furnace through its strong heat storage capacity. The regenerator can make full use of the thermal energy of the activation furnace for normal heat storage and heating. No external heat energy is required. It has two functions. One is to store heat energy. Since the combustible gas in the heating half furnace burns with the oxygen in the air and releases a large amount of heat, when the heat-carrying gas passes through the regenerator and exchanges heat with the refractory bricks therein, the refractory bricks obtain heat energy and play the role of storing heat energy; the second is to use the stored heat energy to heat the activator. The saturated steam is added from the bottom of the regenerator. When it reaches the top through the checker bricks for heat exchange from bottom to top, the temperature can reach 950-1100℃. This process is the process of steam (activator) further obtaining heat, and then the high-temperature activator is supplied to the activation half furnace to participate in the reaction.

[0022] Principle of the present invention:

[0023] 1. The high-yield and high-efficiency activated carbon activation device of the present invention is a device that performs two special modifications on the original structure of the traditional Slep activation furnace. One is to appropriately increase the number of furnace core brick layers in the activation zone and extend the activation section. This modification is to increase the contact time between the material in the furnace and the activation medium, thereby achieving the purpose of improving the activation rate. The second is to build a tail gas reinjection device on the side where the activator channel enters the activation furnace. The device uses high-pressure steam to reinject part of the externally discharged activated exhaust gas into the activation furnace, which can not only reduce the amount of steam used in the activation furnace, but also change the composition of the activator in the furnace and increase the concentration of oxidants such as carbon dioxide in the furnace. It helps to improve the activation rate. In addition, the process operation of the activation furnace is also a key point that cannot be ignored. The upper near flue, upper far flue, lower near flue and lower far flue of the activation furnace are respectively provided with a second air distribution port, and the second air distribution port includes an upper air distribution port and a lower air distribution port, and valves are respectively provided on the upper air distribution port and the lower air distribution port. Under normal process conditions, you can choose to use the upper air outlet and the lower air outlet for air supply. When the temperature needs to be increased, the air supply valve of the upper air outlet must be closed and only the lower air outlet is used for air supply. Because the air entering the upper air outlet is easy to float above the side flue, and it is not easy to mix and burn with the flue gas, which increases the oxygen content entering the horizontal airway of the furnace core, resulting in an increase in the charcoal burnout rate. At the same time, the direct contact and combustion of excess oxygen and charcoal will produce local high temperatures in the furnace core bricks, increase the probability of product channel blockage, furnace core burnout and other malignant accidents, and endanger the safe operation of the activation furnace. The air entering the lower air outlet can better blend and burn with the flue gas, reduce the oxygen content in the flue gas, slow down the increase in the charcoal burnout rate, and inhibit the occurrence of product channel blockage, furnace core burnout and other malignant accidents.

[0024] 2. The high-yield and high-efficiency activated carbon activation process of the present invention increases the activation temperature from 900-950°C of the traditional process to 950-1100°C, and reduces the steam pressure from 2kg / cm 2 Increase to 3-3.5kg / cm 2 , the furnace pressure of the traditional activation half furnace is 80~100Pa, and the furnace pressure of the heating half furnace is 40~60Pa, which is increased to 100~120Pa for the activation half furnace and 70~100Pa for the heating half furnace; the flue draft is increased from -130Pa of the traditional process to -150Pa. Based on the setting of the activation device structure, the activation temperature is increased to 950~1100℃. After the temperature of the activation zone is increased, the reaction rate of carbon and water vapor is accelerated, which promotes the activation rate of carbon. However, the amount of steam entering the furnace should be increased under the temperature increase state, and the steam pressure should be controlled at 3~3.5kg / cm 2, the production increase effect is the best. Turn on the activated tail gas reinjection device, mix part of the activated tail gas with steam, which can increase the components of the activator, which is beneficial to the reaction between the activator and the carbon. Improve the activation rate of the carbon in the furnace. At the same time, it can also alleviate the problem of low furnace pressure caused by low steam pressure entering the furnace. It also saves the amount of steam used for activation. The furnace pressure needs to be controlled within a reasonable range, otherwise a large amount of combustible gas will be ejected and burned from the discharge port at the bottom of the furnace, aggravating the surface ablation of the activated carbon out of the furnace. Affect the material consumption and quality of the activated carbon. And damage the airtightness of the furnace, affecting its service life. The suction force of the activation furnace is to enable the flue gas generated in the furnace to circulate in the furnace, and discharge the excess tail gas in time, increase the gas circulation speed in the furnace, and create favorable conditions for increasing the activation rate.

[0025] Beneficial effects of the present invention:

[0026] 1. Significantly improve the output of the activation furnace: Taking the 336-type Spree activation furnace as an example, the daily output of 4.0 / 60 carbon is 4 tons with the traditional operation process technology; with the new device and new process technology, the daily output of 4.0 / 60 carbon is 5.5-6.0 tons, and the output is increased by more than 37%;

[0027] 2. Significantly improve the activation depth of the carbon in the furnace: Taking the 336-type Spree activation furnace as an example, with the traditional operation process technology, activated carbon with CTC>70% or more generally needs to be activated twice; with the new device and new process technology, activated carbon with 70%<CTC<100% can be activated at one time, and the indicators are evenly controlled;

[0028] 3. The activated carbon is of good quality and the activation furnace operates stably: while ensuring that the volatile matter of the carbonized material is not higher than 8%, strictly monitoring whether the material level of the material bin at the top of the activation furnace drops evenly, weighing the material discharge amount of each feeder regularly (not less than once a week), and promptly dealing with problems such as bulky materials and product channel blockage, the activation furnace can be kept running stably for a long time;

[0029] 4. Improve the operating efficiency of the activation waste heat boiler, and achieve a balance between the steam consumed by the activation furnace and the steam produced by the waste heat of the tail gas: Taking the 336-type Spree activation furnace as an example, with the traditional operating process technology, the heat energy generated by the tail gas of two activation furnaces with the same product channel passing through the incinerator makes the steam produced by the waste heat boiler meet at most two-thirds of the steam used for activation of the two activation furnaces, and the insufficient steam has to be supplemented by the carbonization tail gas waste heat boiler; with the new activation operation process technology, the heat energy generated by the tail gas of two activation furnaces with the same product channel passing through the incinerator makes the steam produced by the waste heat boiler not only meet the steam needs of the two activation furnaces, but also provide heat energy for the steam used for carbonization production and domestic use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the high-yield and high-efficiency activated carbon activation device of the present invention.

[0031] In the figure: furnace body 1, furnace wall 11, side flue 12, upper near flue 121, upper far flue 122, lower near flue 123, lower far flue 124, isolation wall 13, left half furnace a, right half furnace b, lower connecting flue 14, first air distribution port 15, furnace core 16, feeding trough 17, discharge bin 18, covered brick 19, second air distribution port 10, upper air distribution port 101, lower air distribution port 102, regenerator 2, left regenerator 21, right regenerator 22, regenerator grid 23, steam boiler 3, combustion chamber 31, steam chamber 32, flue gas duct 33, steam duct 34, tail gas reinjection device 4. DETAILED DESCRIPTION

[0032] A high-yield and high-efficiency activated carbon activation device comprises a furnace body 1, a heat storage chamber 2 and a steam boiler 3, wherein:

[0033] The furnace body 1 includes a furnace wall 11, a furnace chamber is formed in the furnace wall 11, a side flue 12 is arranged on the inner side of the furnace wall 11, and the furnace body 1 is divided into a left half furnace a and a right half furnace b by a partition wall 13 in the middle of the furnace chamber. The lower parts of the left half furnace a and the right half furnace b are connected through a lower connecting flue 14 and are provided with a first air distribution port 15. The left half furnace a and the right half furnace b are respectively provided with a furnace core 16; a plurality of activation tanks which are not connected to each other are arranged in the furnace core 16, and a feeding tank 17 is arranged on the top of each activation tank. , a discharge bin 18 is provided at the bottom of the activation tank; the side flue 12 is divided into an upper near flue 121, an upper far flue 122, a lower near flue 123 and a lower far flue 124 by a cover brick 19, and the upper near flue 121, the upper far flue 122, the lower near flue 123 and the lower far flue 124 are respectively provided with a second air distribution port 10, and the second air distribution port 10 includes an upper air distribution port 101 and a lower air distribution port 102, and valves are respectively provided on the upper air distribution port 101 and the lower air distribution port 102;

[0034] The regenerator 2 includes a left regenerator 21 and a right regenerator 22. The left regenerator 21 is connected to the left half furnace a through an upper flue, and the right regenerator 22 is connected to the right half furnace b through an upper flue.

[0035] The steam boiler 3 includes a combustion chamber 31 and a steam chamber 32. The left heat storage chamber 21 and the right heat storage chamber 22 are connected to the combustion chamber 31 through a flue gas duct 33, respectively. The left heat storage chamber 21 and the right heat storage chamber 22 are connected to the steam chamber 32 through a steam duct 34, respectively. Solenoid valves 35 are provided on the flue gas duct 33 and the steam duct 34, respectively.

[0036] The left half furnace a and the right half furnace b are divided into four sections from top to bottom, namely, the charging preheating section, the supplementary carbonization section, the activation section and the discharging cooling section.

[0037] The furnace wall 11 includes an outer wall and an inner wall, the outer wall is built with red bricks, the inner wall is built with refractory clay bricks, and the space between the inner wall and the outer wall is filled with aluminum silicate fiber felt for heat insulation; the isolation wall 13 is built with refractory clay bricks; and the furnace core 16 is built with special-shaped refractory clay bricks.

[0038] The regenerator chamber 2 is built of refractory bricks, and a regenerator grid 23 made of stacked refractory bricks is arranged in the cavity of the regenerator chamber 2, and an activator channel is provided.

[0039] The left half furnace a and the right half furnace b are respectively provided with tail gas reinjection devices 4 , which are arranged on the side where the activating agent is introduced, and are communicated with the lower flue 14 .

[0040] A high-yield, high-efficiency activated carbon activation process is a new activation operation technology that is innovated after improving some facilities of the original Slep furnace activation furnace and matches it. The production process of the activation furnace is briefly described as follows: the carbonized material is added to the feeding trough at the top of the activation furnace, and the carbonized material is activated in the activation trough along the product channel from top to bottom through the feeding preheating section, supplementary carbonization section, activation section and discharge cooling section. Finally, the cooled activated material is output through the discharge bin. The steps of the activation treatment are as follows:

[0041] (1) First, the left half furnace is used as the activation half furnace and the right half furnace is used as the heating half furnace. The steam pipe of the left regenerator, the smoke pipe of the right regenerator, the air distribution valve of the right half furnace and the inlet valve of the tail gas reinjection device of the left half furnace are opened. The smoke pipe of the left regenerator, the steam pipe of the right regenerator, the air distribution valve of the left half furnace and the inlet valve of the tail gas reinjection device of the right half furnace are closed. The preheated water vapor in the steam chamber or the sub-cylinder enters the left regenerator from the steam pipe. After the steam pressure entering the furnace is stable, the valve of the tail gas reinjection device on the left side can be opened according to the furnace pressure. Hot water vapor and part of the activated tail gas are heated in the left regenerator to form superheated mixed steam, and then the superheated mixed steam enters the left half furnace through the upper flue, and the superheated mixed steam reacts with the carbon material in the left half furnace to activate the activated gas through the bottom of the left half furnace into the lower flue, and then enters the right half furnace from the bottom, oxygen is introduced into the flue air distribution port of the right half furnace to assist combustion, and part of the flue gas is burned to heat the right half furnace, and the remaining activated gas medium enters the right regenerator from the upper flue, and then enters the combustion chamber for combustion, and is finally discharged from the chimney;

[0042] (2) After 30 minutes, the activation furnace is switched, with the right half furnace as the activation half furnace and the left half furnace as the heating half furnace. The steam pipe of the right regenerator, the flue gas pipe of the left regenerator, the air distribution valve of the left half furnace and the inlet valve of the exhaust gas reinjection device of the right half furnace are opened. The flue gas pipe of the right regenerator, the steam pipe of the left regenerator, the air distribution valve of the right half furnace and the inlet valve of the exhaust gas reinjection device of the right half furnace are closed. The preheated steam in the steam chamber or the steam cylinder enters the right regenerator from the steam pipe. After the steam pressure entering the furnace is stable, the right exhaust gas can be opened according to the furnace pressure. Valve of the reinjection device; preheated water vapor and part of the activated tail gas are heated in the right regenerator to form superheated mixed steam, and then the superheated mixed steam enters the right half furnace through the upper flue, and the superheated mixed steam reacts with the carbonized material in the right half furnace for activation, and the activated gas enters the lower flue through the bottom of the right half furnace, and then enters the left half furnace from the bottom, at this time, oxygen is introduced into the air distribution port of the left half furnace to assist combustion, and part of the flue gas is burned to heat up the left half furnace, and the remaining activated gas medium enters the left regenerator from the upper flue, and then enters the combustion chamber for combustion, and finally discharged from the chimney;

[0043] The heat energy generated by combustion in the combustion chamber is used to produce steam through heat exchange in the steam waste heat boiler and then reused in production;

[0044] (3) After 30 minutes, the activation furnace is switched to another phase and the operations of steps (1) and (2) are repeated.

[0045] The superheated steam temperature is 950-1100°C, and the steam pressure entering the furnace is 3.0-3.5 kg / cm 2 The furnace pressure of the activation half furnace is 100-120Pa, and the furnace pressure of the heating half furnace is 70-100Pa; the flue suction is -150Pa. When executing the above process parameters, in order to avoid furnace accidents, the air inlet valve on the flue of the heating half furnace must be closed.

[0046] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementations of the present invention, and the embodiments are only exemplary, and their role is only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that can be thought of by ordinary technicians in this field without creative work, and other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. A high-yield and high-efficiency activated carbon activation device, characterized in that: It comprises a furnace body (1), a heat storage chamber (2) and a steam boiler (3), wherein: The furnace body (1) comprises a furnace wall (11), a furnace chamber is formed in the furnace wall (11), a side flue (12) is provided on the inner side of the furnace wall (11), the furnace body (1) is divided into a left half furnace (a) and a right half furnace (b) by a partition wall (13) in the middle of the furnace chamber, the lower parts of the left half furnace (a) and the right half furnace (b) are connected through a lower connecting flue (14) and are provided with a first air distribution port (15), and the left half furnace (a) and the right half furnace (b) are respectively provided with a furnace core (16); a plurality of activation tanks which are not connected to each other are provided in the furnace core (16), and each activation tank has a feeding tank (17) at the top. ), a discharge bin (18) is provided at the bottom of the activation tank; the side flue (12) is divided into an upper near flue (121), an upper far flue (122), a lower near flue (123) and a lower far flue (124) by a cover brick (19); the upper near flue (121), the upper far flue (122), the lower near flue (123) and the lower far flue (124) are respectively provided with a second air distribution port (10); the second air distribution port (10) comprises an upper air distribution port (101) and a lower air distribution port (102); valves are respectively provided on the upper air distribution port (101) and the lower air distribution port (102); The regenerator (2) comprises a left regenerator (21) and a right regenerator (22), the left regenerator (21) being connected to the left half furnace (a) through an upper flue, and the right regenerator (22) being connected to the right half furnace (b) through an upper flue; The steam boiler (3) comprises a combustion chamber (31) and a steam chamber (32); the left heat storage chamber (21) and the right heat storage chamber (22) are respectively connected to the combustion chamber (31) via a flue gas duct (33); the left heat storage chamber (21) and the right heat storage chamber (22) are respectively connected to the steam chamber (32) via a steam duct (34); and solenoid valves (35) are respectively provided on the flue gas duct (33) and the steam duct (34); The left half furnace (a) and the right half furnace (b) are respectively provided with tail gas reinjection devices (4), the tail gas reinjection devices (4) are arranged on the side where the activating agent is introduced, and the tail gas reinjection devices (4) are connected to the lower flue (14); The heat storage chamber (2) is built with refractory bricks, and a heat storage grid (23) made of stacked refractory bricks is provided in the cavity of the heat storage chamber (2), and an activator channel is provided.

2. The high-yield and high-efficiency activated carbon activation device according to claim 1 is characterized in that: The left half furnace (a) and the right half furnace (b) are divided into four sections from top to bottom, namely the charging preheating section, the supplementary carbonization section, the activation section and the discharge cooling section.

3. The high-yield and high-efficiency activated carbon activation device according to claim 1 is characterized in that: The furnace wall (11) comprises an outer wall and an inner wall, the outer wall is built with red bricks, the inner wall is built with refractory clay bricks, and the space between the inner wall and the outer wall is filled with aluminum silicate fiber felt for heat insulation; the isolation wall (13) is built with refractory clay bricks; and the furnace core (16) is built with special-shaped refractory clay bricks.

4. A high-yield and high-efficiency activated carbon activation process, characterized in that: The activation process is completed by using the high-yield and high-efficiency activated carbon activation device as claimed in claim 1, comprising the following steps: adding the carbonized material to the feeding tank, the carbonized material is activated in the activation tank from top to bottom through the feeding preheating section, the supplementary carbonization section, the activation section and the discharge cooling section, and the finally cooled activated material is output through the discharge bin. The activation treatment steps are: (1) First, use the left half furnace as the activation half furnace and the right half furnace as the heating half furnace. Open the left regenerator steam pipe, the right regenerator smoke pipe, the air distribution valve of the right half furnace and the inlet valve of the tail gas reinjection device of the left half furnace. Close the left regenerator smoke pipe, the right regenerator steam pipe, the air distribution valve of the left half furnace and the inlet valve of the tail gas reinjection device of the right half furnace. The preheated water vapor in the steam chamber or the steam cylinder enters the left regenerator from the steam pipe. After the steam pressure entering the furnace is stable, the valve of the tail gas reinjection device on the left side can be opened according to the furnace pressure. Hot water vapor and part of the activated tail gas are heated in the left regenerator to form superheated mixed steam, and then the superheated mixed steam enters the left half furnace through the upper flue, and the superheated mixed steam reacts with the carbon material in the left half furnace to activate the activated gas through the bottom of the left half furnace into the lower flue, and then enters the right half furnace from the bottom, oxygen is introduced into the flue air distribution port of the right half furnace to assist combustion, and part of the flue gas is burned to heat the right half furnace, and the remaining activated gas medium enters the right regenerator from the upper flue, and then enters the combustion chamber for combustion, and is finally discharged from the chimney; (2) After 30 minutes, the activation furnace is switched, with the right half furnace as the activation half furnace and the left half furnace as the heating half furnace. The steam pipe of the right regenerator, the flue gas pipe of the left regenerator, the air distribution valve of the left half furnace and the inlet valve of the exhaust gas reinjection device of the right half furnace are opened. The flue gas pipe of the right regenerator, the steam pipe of the left regenerator, the air distribution valve of the right half furnace and the inlet valve of the exhaust gas reinjection device of the right half furnace are closed. The preheated water vapor in the steam chamber or the steam cylinder enters the right regenerator from the steam pipe. After the steam pressure entering the furnace is stable, the right exhaust gas can be opened according to the furnace pressure. Valve of the reinjection device; preheated water vapor and part of the activated tail gas are heated in the right regenerator to form superheated mixed steam, and then the superheated mixed steam enters the right half furnace through the upper flue, and the superheated mixed steam reacts with the carbonized material in the right half furnace for activation, and the activated gas enters the lower flue through the bottom of the right half furnace, and then enters the left half furnace from the bottom, at this time, oxygen is introduced into the air distribution port of the left half furnace to assist combustion, and part of the flue gas is burned to heat up the left half furnace, and the remaining activated gas medium enters the left regenerator from the upper flue, and then enters the combustion chamber for combustion, and finally discharged from the chimney; The heat energy generated by combustion in the combustion chamber is used to produce steam through heat exchange in the steam waste heat boiler and then reused in production; (3) After 30 minutes, the activation furnace is switched to another phase, and steps (1) and (2) are repeated; The temperature of the superheated mixed steam is 950~1100 ℃, and the steam pressure entering the furnace is 3.0~3.5kg / cm2; the furnace pressure of the activation half furnace is 100~120Pa, and the furnace pressure of the heating half furnace is 70~100Pa; the flue suction is -150Pa. When executing the above process parameters, the air inlet valve on the flue of the heating half furnace must be closed.

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