CN113787581B

CN113787581B - Odorless deep carbonization process, wood containing active carbon intermediate and application thereof

Info

Publication number: CN113787581B
Application number: CN202111022605.7A
Authority: CN
Inventors: 陈旭明; 曾邵平
Original assignee: Hangzhou Hesheng Wood Technology Co ltd
Current assignee: Hangzhou Hesheng Wood Technology Co ltd
Priority date: 2021-08-20
Filing date: 2021-09-01
Publication date: 2023-10-27
Anticipated expiration: 2041-09-01
Also published as: CN113787581A

Abstract

The application discloses a odorless deep carbonization process, wood containing an activated carbon intermediate and application thereof, and relates to the technical field of wood carbonization, comprising the following steps: (1) selecting wood with the density of 50-90%; (2) Cutting wood, and then placing the wood into a soaking tank for degreasing soaking; (3) transferring the degreased wood board into a drying furnace for drying; (4) Transferring the dried wood into a carbonization furnace for deep carbonization; (5) carrying out steam backwater on the carbonized wood; and (6) drying the wood and returning the steam again. The prepared carbonized wood can produce an activated carbon intermediate, has stronger formaldehyde adsorption capacity, exceeds the formaldehyde adsorption capacity of bamboo charcoal, does not contain any harmful substances, is not mildewed, long-worm-resistant, not easy to deform and crack, can greatly increase the service life of the wood, has no scorching smell, can be used for a sun-exposed southern balcony, a basement or a bathroom with dark tide temperature, and can be applied to any wooden product indoors.

Description

Odorless deep carbonization process, wood containing active carbon intermediate and application thereof

Technical Field

The application relates to the technical field of wood carbonization, in particular to a odorless deep carbonization process, a wood containing an activated carbon intermediate and application thereof.

Background

In order to prolong the service life of wood products, slow down natural resource consumption and protect ecological environment, wood is artificially modified, the defects of durability, easy deformation and the like in the use of the wood products are overcome, the deep carbonization treatment of the wood is widely focused, the deep carbonization of the wood not only increases the shock resistance, bending resistance, deformation resistance, corrosion resistance, moth resistance and the like of the wood, but also can generate an activated carbon intermediate, and has an extraordinary effect on purifying indoor air (removing formaldehyde and benzene). However, the carbonized wood has heavy burnt smell and is not easy to volatilize, and after the carbonized wood is manufactured into products, the peculiar smell is obvious, the experience is affected, and the original deep carbonized wood is mostly used outdoors.

Disclosure of Invention

1. Technical problem to be solved by the application

Aiming at the technical problem that the scorched smell of the carbonized wood is heavy, the application provides a odorless deep carbonization process, the wood containing the activated carbon intermediate and the application thereof, and the method can effectively remove the scorched smell in the carbonized wood.

2. Technical proposal

In order to solve the problems, the technical scheme provided by the application is as follows: a process for deeply carbonizing wood without smell, which comprises the following steps:

(1) Selecting wood with the density of 50-90%;

(2) Cutting wood, and then placing the wood into a soaking tank for degreasing soaking;

(3) Transferring the degreased wood board into a drying furnace for drying;

(4) Transferring the dried wood into a carbonization furnace for deep carbonization;

(5) Steam backwater is carried out on the carbonized wood;

(6) Drying the wood, and returning water by steam again.

Optionally, the drying furnace in the step (3) is provided with a circulating ventilation system.

Optionally, the temperature range of the deep carbonization in the step (4) is 200-250 ℃.

Optionally, the degreasing agent in the soaking tank is an alkaline solution.

Optionally, the alkaline solution is sodium bicarbonate, washing powder or hydrogen peroxide.

The application also discloses a wood containing the activated carbon intermediate, which is prepared by using the odorless deep carbonization process of the wood.

Optionally, the surface of the wood containing the activated carbon intermediate is sprayed with a formaldehyde scavenger.

Optionally, the formaldehyde scavenger is a photocatalyst, a nano noble metal or an amino acid.

The application also discloses application of the wood containing the activated carbon intermediate in daily necessities, wherein the daily necessities comprise products with environmental protection and purification functions such as floors, wooden doors, wallboards, cabinet bodies, cabinet doors, stairs, blind curtains, solid wood lamps or ornaments.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the application has the following beneficial effects:

(1) The wood containing the activated carbon intermediate provided by the embodiment of the application can generate a large amount of activated carbon intermediate in the deep carbonization process, and has a strong formaldehyde adsorption effect. Then spraying a photocatalyst, nano noble metal, amino acid and other formaldehyde scavenger on the surface of the product to ensure that the product has the function of adsorbing formaldehyde, decomposing the formaldehyde into water by the photocatalyst, releasing the water into the air, and balancing indoor humidity.

(2) The wood smell-less deep carbonization process provided by the embodiment of the application has the advantages that the prepared carbonized wood is not mildewed, is not long, is not easy to deform and crack, can greatly increase the service life of the wood, has no burnt smell, and can be used for a sun-exposed southern balcony and a basement or a bathroom with dark tide temperature. The heat-insulating material can be used for not only heating up or heating up northern dry climates, but also wet and braised southern areas, can be applied to any wooden product indoors, such as boards, floors, movable furniture, wooden doors, wallboards, cabinet bodies, cabinet doors, stairs, outdoor floors, outdoor furniture, blind curtains, solid wood lamps and ornaments and the like, has environment-friendly purification function, and can also be used for interior decoration materials of vehicles and ships to increase user experience.

Detailed Description

For a further understanding of the present application, the present application will be described in detail with reference to examples.

The present application will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. In addition, the first, second, etc. words in the present application are provided for convenience in describing the technical solution of the present application, and are not specifically limited, but are used for general meaning, and do not constitute a limitation to the technical solution of the present application. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. In the description of the present application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate an orientation or a positional relationship, and are merely for convenience of description and simplification of the description, but do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art. The technical schemes in the same embodiment and the technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is within the scope of the application.

Examples

The odorless deep carbonization process for wood of the embodiment comprises the following steps:

(1) Selecting 50% -90% of wood, such as oak, white wood, fraxinus mandshurica, rubber wood, cherry wood, black walnut and the like, wherein if the density of the wood is lower than 50%, the oil is too much, the wood is easy to catch fire in the process of preparing a product, and if the density of the wood is higher than 90%, the cost of the wood is higher, pores of the wood are too small, and the effect of odorless deep carbonization purification is poor;

(2) After the wood is cut, the wood is placed in a soaking tank, degreasing agents in the soaking tank are alkaline solutions, such as sodium bicarbonate, washing powder, hydrogen peroxide and the like, resin in the wood can be removed, and the wood is deeply carbonized later, so that only a small amount of degreasing agents are needed to soak, and the degreasing agents are decomposed at a high temperature;

(3) Drying the timber in a drying furnace at the temperature of 100 ℃, circularly exhausting water through a circulating ventilation system of the drying furnace, removing peculiar smell, accelerating drying speed, simultaneously evaporating a great amount of degreasing solvent, and reducing the water content in the timber;

(4) The dried wood is transferred into a carbonization furnace for stepwise carbonization, the wood is firstly subjected to mild carbonization at the temperature of 120 ℃, the rest of the dried wood contains water, ventilation is performed to accelerate drainage, tar smell of the wood is removed, a small amount of grease is discharged and recycled, the ignition point of the wood is reduced, the effects of moderate sterilization and difficult mildew and worm generation are achieved, wood fibers are slightly damaged, and the wood is difficult to stretch and deform; then, the wood is subjected to moderate carbonization at the temperature of 150 ℃, the rest water is continuously dried, the tar smell of the wood is removed, the medium amount of fat is discharged and recovered, the ignition point of the wood is reduced, the effects of deep sterilization and difficult mildew and worm generation are achieved, wood fibers are damaged moderately, and the wood is difficult to stretch and deform; finally, deep carbonization is carried out on wood at the temperature of 200-250 ℃ (if the temperature is lower than 200 ℃, the wood cannot reach the effect of deep carbonization, the formaldehyde removal rate is influenced, if the temperature is higher than 250 ℃, the wood carbonization degree is too high, the toughness of the wood is influenced, the wood furniture is not easy to manufacture), wood fibers are highly destroyed, an activated carbon intermediate is generated by the wood, the formaldehyde adsorption capability exceeds that of bamboo charcoal (the formaldehyde removal rate of the deep carbonized wood can reach 83.4%, the formaldehyde removal rate of the bamboo charcoal is more than 90%, the area of a bamboo charcoal bag is smaller, the deep carbonized wood can be directly manufactured into floors, wallboards and door products, formaldehyde decomposition agents are added before coating, the formaldehyde removal effect is multiple times that of the bamboo charcoal bag), the deep carbonized wood does not contain any harmful substances, the wood furniture is a real green environment-friendly product, meanwhile, tar smell of the wood is removed by ventilation, a large amount of grease removal is reduced, the combustion point of the wood is reduced, the effect of deep sterilization and the wood is not easy to mould and grow insects is further increased, the wood is easy to polish. Step carbonization enables wood to be carbonized more thoroughly;

(5) The carbonized wood is subjected to water vapor backwater, the water vapor has higher temperature, and the temperature is close to that of the carbonized wood, so that pores of the wood are expanded, the wood is further cleaned, and the scorched smell is removed more thoroughly;

(6) And drying the wood after the water vapor backwater, and backwatering the wood again by the vapor so that the backwater amount reaches 10% of the water content standard of the log of the wood, and preventing the phenomena of cracking, deformation and the like of the wood caused by overdry.

The prepared timber containing the activated carbon intermediate has excellent performance in purifying indoor air (see report of national inspection center), does not go moldy, does not grow worm, is not easy to deform and crack, can greatly increase the service life of the timber, has no burnt smell, and can be used for a southern balcony exposed to the sun and a basement or a bathroom with dark tide temperature. The heat-insulating material can be used for not only heating up or heating up northern dry climates, but also wet and braised southern areas, can be applied to any wooden product indoors, such as plates, floors, movable furniture, wooden doors, wallboards, cabinet bodies, cabinet doors, stairs, outdoor floors, outdoor furniture, blind curtains, solid wood lamps and lanterns, decorations and the like, can also be used for interior decoration materials of vehicles and vessels, has strong formaldehyde adsorption capability, has no peculiar smell, and increases user experience.

After wood containing the activated carbon intermediate is processed into a product, formaldehyde scavengers such as a photocatalyst, nano noble metal, amino acid and the like are sprayed on the surface of the product, so that the formaldehyde adsorption capacity of the product is further improved, the photocatalyst decomposes formaldehyde into water to be released in the air, and the indoor humidity is balanced.

The application and its embodiments have been described above by way of illustration and not limitation, and the actual construction is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present application.

Claims

1. A process for deeply carbonizing wood without smell, which is characterized by comprising the following steps:

(1) Selecting wood with the density of 50-90%;

(2) Placing the wood in a soaking tank after cutting, wherein a degreasing agent in the soaking tank is alkaline solution;

(3) Moving the timber into a drying furnace to be dried at the temperature of 100 ℃, and circularly discharging water through a circulating ventilation system of the drying furnace;

(4) Transferring the dried wood into a carbonization furnace for stepwise carbonization, firstly lightly carbonizing the wood at 120 ℃, drying the rest of the wood to contain water, and simultaneously ventilating to accelerate drainage; then, the timber is carbonized at the temperature of 150 ℃ for continuous drying and the rest water content; finally, deeply carbonizing the wood at the temperature of 200-250 ℃ and increasing ventilation;

(5) Carrying out steam backwater on carbonized wood;

(6) And drying the wood after the water vapor backwater, and backwatering the wood again by the vapor so that the backwater amount reaches 10% of the water content standard of the log of the wood.

2. The process of claim 1, wherein the degreasing agent in the soaking tank is an alkaline solution.

3. The process for the odorless deep carbonization of wood according to claim 2, wherein the alkaline solution is sodium bicarbonate, washing powder or hydrogen peroxide.

4. A wood containing an activated carbon intermediate, characterized by being produced by the wood odorless deep carbonization process according to any one of claims 1 to 3.

5. The activated carbon intermediate-containing wood of claim 4 wherein the activated carbon intermediate-containing wood surface is sprayed with formaldehyde scavenger.

6. The activated carbon intermediate-containing wood of claim 5, wherein the formaldehyde scavenger is a photocatalyst, a nano noble metal, or an amino acid.

7. Use of the activated carbon intermediate-containing wood according to any one of claims 4 to 6 in daily necessities for life, including floors, wooden doors, wallboards, cabinets, cabinet doors, stairs, blinds, solid wood lamps or decorations.