CN212414616U

CN212414616U - Dried bean production forming equipment under atmospheric steam condition

Info

Publication number: CN212414616U
Application number: CN202020851783.5U
Authority: CN
Inventors: 李小平; 赖永裕; 巫硕琦; 白承晖; 谢素莲; 李运程; 庞莲香
Original assignee: Guangxi Geka Environmental Protection Technology Co ltd
Current assignee: Guangxi Geka Environmental Protection Technology Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-01-29
Anticipated expiration: 2030-05-20

Abstract

A bean curd stick production and forming device under the condition of normal pressure steam comprises a counter-burning normal pressure superheated steam furnace and a bean curd stick forming device, wherein the counter-burning normal pressure superheated steam furnace provides steam for the bean curd stick forming device for heating and forming; the back-burning normal-pressure superheated steam furnace is used for continuously heating the generated saturated steam by utilizing the heat of flue gas, producing superheated steam under the normal-pressure state, and then using the superheated steam for forming the dried beancurd sticks, so that the forming efficiency is high, and simultaneously, the requirements of pulp boiling and drying heat supply in the production process of the dried beancurd sticks can be met; for the pressure-bearing steam boiler, the potential safety hazard is small, the technical requirements on design, manufacture and use are low, the use of a user is safer and more convenient, and the use and operation cost is low.

Description

Dried bean production forming equipment under atmospheric steam condition

Technical Field

The utility model relates to a dried bean processing equipment technical field specifically is a dried bean production former under the atmospheric pressure steam condition.

Background

The dried beancurd stick, also called beancurd sheet or beancurd sheet, is a thin film solidified on the surface of boiled soybean milk, can be eaten fresh or after being dried in the sun, has been used for over one thousand years since the Tang dynasty, is a traditional food which is very popular with Chinese people, and has the process of peeling, soaking, mixing, pulping, filtering to remove slag, boiling the pulp, peeling to extract the dried beancurd stick and drying to obtain the dried beancurd stick product. The dried beancurd stick is a high-quality bean product which is rich in nutrition and can provide balanced energy for human bodies, is widely called as 'meat in vegetable', but is balanced in energy ratio from the nutrition point of view, has higher nutrient density than that of the common bean product, is rich in nutrition, contains functional components such as VE, unsaturated fatty acid, isopropyl ketone, lecithin and the like, does not contain cholesterol, can improve cardiovascular function after being eaten frequently, supplements amino acid required by human bodies, and is a high-grade nutrient for patients with hypertension, arteriosclerosis and cardiovascular diseases. With the improvement of living standard of people, the requirements on the quality of the dried beancurd sticks are higher.

Researches show that the membrane selection by pulp boiling in the bean curd stick processing is a key link in bean curd stick manufacturing, and at present, the bean curd stick processing in large-scale production has three modes:

1. the traditional tunnel type fire way heating mode mainly comprises the following components in part by weight: the bean curd stick forming groove, the steam generating groove, the tunnel type flame path (built by bricks) and the chimney. The connection mode of the structure is as follows: the tunnel type flame path is arranged at the bottommost part, the steam generating groove falls above the flame path, and the dried bean forming groove is arranged right above the steam generating groove. The bottom of the steam generating groove is directly contacted with the flame of the flame path, water in the steam generating groove is heated to generate steam, and the steam heats the bottom of the dried bean forming groove. The heating mode has the following disadvantages:

1) the front end of the tunnel type flame path is provided with a combustion chamber, the tail end of the tunnel type flame path is connected with a chimney, flame generated by combustion and high-temperature flue gas penetrate through the bottom of the whole steam generation tank under the self-absorption effect of the chimney, a long flame tunnel causes uneven heating of a dried bean forming tank, the temperature difference of the dried bean forming tank is too large, and when the temperature is too high, the bottom of the forming tank generates the phenomena of sticking and scorching; when the temperature is too low, the soybean milk becomes beancurd jelly, and a film cannot be formed, so that the yield and the quality of the dried beancurd sticks are influenced.

2) The front end of the tunnel type flame path is large in flame, high in high-temperature flue gas temperature and high in partial heating of the front end of the steam generation groove, so that deformation is easily caused, and the service life is influenced.

3) The tunnel type flue fuel is not fully combusted, emits black smoke, is directly exhausted into the atmosphere through a towering chimney by self-absorption, and causes pollution to the environment; the fuel heat conversion efficiency is low, the fuel loss is large, and the use cost is high.

2. The pressure-bearing steam heating mode mainly comprises the following structures: a pressure-bearing steam boiler, a dried bean forming groove, a steam groove and a steam pipeline. The connection mode of the structure is that high-pressure steam generated by a steam boiler is conveyed into a cavity of a steam groove through a steam pipeline to heat the bottom of the bean curd stick forming groove. According to the regulation of the existing boiler safety technical supervision regulation in China, a steam boiler with the steam pressure of more than or equal to 0.1Mpa, namely a pressure-bearing steam boiler belongs to special equipment, the design, the processing, the manufacture, the installation and the use of the steam boiler are required to be supervised by a technical supervision department, and the steam boiler can be used only when a user obtains a boiler use certificate. The heating mode has the following disadvantages:

1) the pressure-bearing steam boiler generally adopts coal and biomass as fuels, adopts a direct combustion mode, has insufficient combustion, needs to be additionally provided with a smoke and dust removal processing device to process the discharged smoke, and particularly needs to process sulfides and the like in the coal-fired boiler. The flue gas treatment device matched with the pressure-bearing steam boiler has large investment and high operation cost.

2) The pressure-bearing steam boiler belongs to special equipment, and operators are qualified after special training and certified. The installation and use of the boiler need to be declared, audited and approved by relevant departments. During the use and operation, the system also needs to be supervised and checked by related departments.

3) Potential safety hazards are easily generated when the pressure-bearing steam boiler is used, and if the pressure-bearing steam boiler is not strictly operated according to regulations and used and equipment is not maintained in place, safety accidents are easily generated, and equipment damage and personal injury are caused.

3. The heating mode of the atmospheric steam generator mainly comprises the following components in part by weight: a normal pressure steam generator, a dried bean forming groove, a steam groove and a steam pipeline. The connection mode of the structure is that saturated steam generated by the normal-pressure steam generator is conveyed into the cavity of the steam groove through the steam pipeline to heat the bottom of the dried bean forming groove. The heating mode has the following disadvantages:

1) the normal pressure steam generator generally adopts coal burning, living beings as fuel, adopts the mode of burning of just burning, and this mode of burning is not abundant enough, need increase smoke abatement dust removal processing apparatus, handles discharged flue gas, and especially coal-fired steam generator still need handle sulphide etc.. The flue gas treatment device matched with the normal pressure steam generator has large investment and high operation cost.

2) Saturated steam generated by the atmospheric pressure steam generator enters the steam groove through the steam pipeline and is uniformly dispersed into the cavity to exchange heat with the bottom of the dried bean forming groove, after the saturated steam enters the steam groove, the steam space is enlarged, the pressure is reduced, after heat exchange is carried out, the steam temperature in the steam groove is reduced, the steam temperature in the groove is lower than the condensation temperature of the steam, condensed water is generated, the steam heat utilization efficiency is low, and the normal working temperature required by dried bean forming is difficult to meet; in order to meet the normal working temperature required by the bean curd stick forming, a large amount of saturated steam needs to be input for supplementary heating, so that the steam consumption is large, the energy consumption is high, and the production cost is high.

Disclosure of Invention

The utility model aims at providing a dried bean production former under ordinary pressure steam condition, this equipment is energy-concerving and environment-protective, and the dried bean shaping is efficient, and the quality is good, and all is in the ordinary pressure state in the atmospheric pressure steam stove working process of adoption, and the steam of production can satisfy boiling thick liquid and the shaping heat supply demand of dried bean simultaneously, realizes the many shifts continuity production of dried bean processing.

In order to realize the purpose of the utility model, the technical scheme who takes is:

the bean curd stick production and forming equipment under the atmospheric steam condition has various structures, and three structures are listed below.

The first bean curd stick production and forming equipment under the atmospheric steam condition comprises a counter-burning type atmospheric superheated steam furnace and a bean curd stick forming device, wherein the counter-burning type atmospheric superheated steam furnace provides steam for the bean curd stick forming device for heating and forming;

the bean curd stick forming device comprises a slurry containing groove and a support, wherein the slurry containing groove is in a rectangular shape with an opening at the upper part, a plurality of partition plates are arranged in the slurry containing groove through clamping grooves, the partition plates divide the interior of the slurry containing groove into a plurality of forming tanks, and the forming tanks can be arranged in two rows; the slurry containing groove is arranged on the bracket; a steam bin is arranged at the bottom of the slurry filling groove, a steam inlet pipe is installed in the steam bin, the steam inlet pipe extends into the middle of the steam bin from one end of the steam bin, two sides of the tail end of the steam inlet pipe are respectively connected with a steam distribution pipe extending to two ends of the steam bin, steam distribution holes are formed in two sides of the steam distribution pipe, steam is introduced into the steam distribution holes of the steam distribution pipe to provide steam for the slurry filling groove for heating forming, and a water and steam discharging opening is formed in the other end of the steam bin; the outer parts of the slurry filling tank and the steam bin are wrapped with heat insulation layers, so that energy dissipation is avoided or reduced;

the back-burning normal-pressure superheated steam furnace comprises a furnace base and a furnace body, wherein the furnace body is arranged on the furnace base; a hearth is arranged in the furnace body, and water-containing layers are arranged on the hearth walls on the two sides of the hearth; a steam generator is arranged at the upper part of the hearth, and a pressure release valve and a water replenishing port are arranged on the steam generator; a plurality of water heating pipes transversely penetrate through the steam generator; the lower part of the hearth is provided with a water-cooling grate through a grate mounting frame; the water-cooled grate is communicated with a water-holding layer, and the water-holding layer is communicated with the steam generator through a communicating pipe; the furnace body at the front part of the hearth is provided with an ash discharge port and a furnace door; two sides of the hearth are respectively provided with a secondary combustion chamber and a smoke introducing bin; the lower part of the secondary combustion chamber is communicated with a hearth through a fire hole, the hearth is provided with a primary oxygen inlet, and the secondary combustion chamber is provided with a secondary oxygen inlet; the upper part of the secondary combustion chamber is communicated with one end of a water heating pipe, and the other end of the water heating pipe is communicated with the upper part of a smoke ventilation bin; a heat exchanger is arranged on one side of the smoke passing bin; the bottom of the heat exchanger is provided with a smoke distribution chamber which is communicated with the lower part of the smoke through bin; a plurality of heat exchange tubes vertically penetrate through the heat exchanger; the bottom end of the heat exchange pipe is communicated with the smoke distribution chamber, the top end of the heat exchange pipe is communicated with a smoke outlet, and the smoke outlet is connected with a smoke pipe for discharging smoke; the smoke tube can be selectively connected with a smoke purifying and discharging device which is a traditional smoke purifying and discharging device and comprises a water film dust remover, a smoke induced draft fan and a chimney; a steam overheating cavity is arranged in the heat exchanger, and the lower part of the steam overheating cavity is communicated with the top of the steam generator through a steam guide pipe; the steam guide pipe is provided with a three-way valve for distributing and conveying steam, and the three-way valve can convey boiled pulp, molded and dried; the upper part of the steam overheating cavity is provided with a steam outlet; the steam outlet is connected with the steam inlet pipe through a steam pipe. The secondary combustion chamber is provided with a dust cleaning port, so that dust in the secondary combustion chamber can be cleaned conveniently. The smoke separating chamber is provided with a slag removing opening, so that dust in the smoke separating chamber can be conveniently removed.

Preferably: a hot air cavity is also arranged in the heat exchanger; the hot air cavity is arranged at the upper part of the steam overheating cavity, the lower part of the hot air cavity is provided with an air inlet, and the upper part of the hot air cavity is provided with a hot air outlet; the hot air output by the hot air outlet is conveyed to the bottom of the steam bin to heat and insulate the steam bin. The shell of the heat exchanger is cylindrical or elliptical, and the interior of the heat exchanger is divided into a steam overheating cavity and a hot air cavity up and down; the heat exchange pipe penetrates through the steam overheating cavity and the hot air cavity; the steam guide pipe, the steam outlet, the air inlet and the hot air outlet are communicated with the cylindrical surface of the heat exchanger in a normal tangent mode.

The bean curd stick production and forming equipment under the condition of normal pressure steam comprises a counter-burning normal pressure superheated steam furnace and a bean curd stick forming device, wherein the counter-burning normal pressure superheated steam furnace provides steam for the bean curd stick forming device for heating and forming; the bean curd stick forming device comprises a slurry containing groove and a support, wherein the slurry containing groove is in a rectangular shape with an opening at the upper part, a plurality of partition plates are arranged in the slurry containing groove through clamping grooves, the partition plates divide the interior of the slurry containing groove into a plurality of forming tanks, and the forming tanks are arranged in two rows; the slurry containing groove is arranged on the bracket; a steam bin is arranged at the bottom of the slurry filling groove, a steam inlet pipe is installed in the steam bin, the steam inlet pipe extends into the middle of the steam bin from one end of the steam bin, two sides of the tail end of the steam inlet pipe are respectively connected with a steam distribution pipe extending to two ends of the steam bin, steam distribution holes are formed in two sides of the steam distribution pipe, steam is introduced into the steam distribution holes of the steam distribution pipe to provide steam for the slurry filling groove for heating forming, and a water and steam discharging opening is formed in the other end of the steam bin; the outer parts of the slurry filling tank and the steam bin are wrapped with heat insulation layers, so that energy dissipation is avoided or reduced;

the back-burning normal-pressure superheated steam furnace comprises a furnace base and a furnace body, wherein the furnace body is arranged on the furnace base; a hearth is arranged in the furnace body, and water-containing layers are arranged on the hearth walls on the two sides of the hearth; a steam generator is arranged at the upper part of the hearth, and a pressure release valve and a water replenishing port are arranged on the steam generator; a partition plate which divides the upper part and the lower part of the steam generator into a steam overheating cavity and a steam generating cavity is transversely arranged in the steam generator; one end of the steam superheating cavity is communicated with the steam generating cavity through a steam passing port, and the top of the other end of the steam superheating cavity is provided with a steam guide pipe; a three-way valve is arranged on the steam conduit; the three-way valve distributes steam to boil and dry, and is also connected with a steam inlet pipe through a steam pipe to provide steam for the steam bin; a plurality of steam superheating pipes transversely penetrate through the steam superheating cavity; a plurality of water heating pipes transversely penetrate through the steam generating cavity; the steam superheating pipe and the water heating pipe are communicated with a smoke passing bin at the end close to the steam passing port; the end of the steam superheating pipe, which is far away from the steam passing port, is connected with a smoke collection bin, and the smoke collection bin is provided with a smoke conveying pipe; the lower part of the hearth is provided with a water-cooling grate through a grate mounting frame; the water-cooled grate is communicated with a water-clamping layer, and the water-clamping layer is communicated with a steam generating cavity of the steam generator through a communicating pipe; the furnace body at the front part of the hearth is provided with an ash discharge port and a furnace door; one side of the hearth is provided with a secondary combustion chamber; the lower part of the secondary combustion chamber is communicated with a hearth through a fire hole, the hearth is provided with a primary oxygen inlet, and the secondary combustion chamber is provided with a secondary oxygen inlet; the upper part of the secondary combustion chamber is communicated with the steam passing port end of the water heating pipe. The secondary combustion chamber is provided with a dust cleaning port, so that dust in the secondary combustion chamber can be cleaned conveniently. The smoke passing bin is provided with a slag removing port, so that dust passing through the smoke passing bin can be conveniently removed.

The bean curd stick production and forming equipment under the third atmospheric steam condition comprises a reverse combustion type atmospheric superheated steam furnace and a bean curd stick forming device, wherein the reverse combustion type atmospheric superheated steam furnace provides steam for the bean curd stick forming device for heating and forming;

the bean curd stick forming device comprises a slurry containing groove and a support, wherein the slurry containing groove is in a rectangular shape with an opening at the upper part, a plurality of partition plates are arranged in the slurry containing groove through clamping grooves, the partition plates divide the interior of the slurry containing groove into a plurality of forming tanks, and the forming tanks are arranged in two rows; the slurry containing groove is arranged on the bracket; a steam bin is arranged at the bottom of the slurry filling groove, a steam inlet pipe is installed in the steam bin, the steam inlet pipe extends into the middle of the steam bin from one end of the steam bin, two sides of the tail end of the steam inlet pipe are respectively connected with a steam distribution pipe extending to two ends of the steam bin, steam distribution holes are formed in two sides of the steam distribution pipe, steam is introduced into the steam distribution holes of the steam distribution pipe to provide steam for the slurry filling groove for heating forming, and a water and steam discharging opening is formed in the other end of the steam bin; the outer parts of the slurry filling tank and the steam bin are wrapped with heat insulation layers, so that energy dissipation is avoided or reduced;

the back-burning normal-pressure superheated steam furnace comprises a furnace base and a furnace body, wherein the furnace body is arranged on the furnace base; a hearth is arranged in the furnace body, and water-containing layers are arranged on the hearth walls on the two sides of the hearth; the lower part of the hearth is provided with a water-cooling grate through a grate mounting frame; the water-cooled grate is communicated with a water-clamping layer, and the water-clamping layer is communicated with a steam generating cavity of the steam generator through a communicating pipe; the furnace body at the front part of the hearth is provided with an ash discharge port and a furnace door; one side of the hearth is provided with a secondary combustion chamber; the lower part of the secondary combustion chamber is communicated with a hearth through a fire hole, the hearth is provided with a primary oxygen inlet, and the secondary combustion chamber is provided with a secondary oxygen inlet; a steam generator is arranged at the upper part of the hearth, and a pressure release valve and a water replenishing port are arranged on the steam generator; a partition plate which divides the upper part and the lower part of the steam generator into a steam overheating cavity and a steam generating cavity is transversely arranged in the steam generator; one end of the steam superheating cavity is communicated with the steam generating cavity through a steam passing port, and the top of the other end of the steam superheating cavity is provided with a steam guide pipe; a three-way valve for distributing and conveying steam is arranged on the steam guide pipe; the three-way valve distributes steam to boil and dry, and is also connected with a steam inlet pipe through a steam pipe to provide steam for the steam generating cavity; a plurality of steam superheating pipes transversely penetrate through the steam superheating cavity; a plurality of water heating pipes transversely penetrate through the steam generating cavity; one end of each of the steam superheater pipe and the water heating pipe is connected with a smoke collection bin, the smoke collection bin is provided with a smoke conveying pipe, and the other ends of the steam superheater pipe and the water heating pipe are communicated with a secondary combustion chamber. The secondary combustion chamber is provided with a dust cleaning port, so that dust in the secondary combustion chamber can be cleaned conveniently. The smoke collecting bin is provided with a slag removing port, so that dust in the smoke collecting bin can be conveniently removed.

Preferably: the smoke conveying pipe is connected with a heat exchanger, the bottom of the heat exchanger is provided with a smoke distribution chamber, and the smoke distribution chamber is communicated with the smoke conveying pipe; the heat exchanger is provided with a hot air cavity; a plurality of heat exchange tubes vertically penetrate through the hot air cavity; the bottom end of the heat exchange pipe is communicated with the smoke distributing chamber, the top end of the heat exchange pipe is communicated with a smoke outlet, the smoke outlet is connected with a smoke pipe for discharging smoke, and the smoke pipe can be selectively connected with a smoke purifying and discharging device; the lower part of the hot air cavity is provided with an air inlet, and the upper part of the hot air cavity is provided with a hot air outlet; the hot air output by the hot air outlet is conveyed to the bottom of the steam bin to heat and insulate the steam bin.

Preferably: the bottom of the steam bin is provided with a hot air bin, the hot air bin is arranged between the steam bin and a heat insulation layer at the bottom of the steam bin, one end of the hot air bin is provided with a hot air inlet, and the other end of the hot air bin is provided with an air return port; the hot air inlet is communicated with the hot air outlet through a hot air pipe; the air return port is communicated with the air inlet through an air return pipe and a draught fan, so that the circulating heating of hot air is realized; the hot air inlet of the hot air bin is filled with hot air to heat and preserve heat of steam in the steam bin, the steam in the steam bin is maintained in a certain temperature range, the temperature that the space temperature of the steam bin is lower than the dew point of the steam is avoided or reduced, the generation of condensed water is reduced, the heat utilization rate of the steam is improved, and the working temperature stability of the slurry filling tank is met. The heating device of the bean curd stick forming pool adopts a double-layer independent channel design, the upper layer is a steam channel to directly heat the bean curd stick forming pool, and the bean curd stick forming pool is characterized by being uniformly heated, stable and controllable in temperature and avoiding the phenomenon that soybean milk at the bottom of the bean curd stick forming pool is burnt due to overhigh temperature to influence the quality and the yield of bean curd sticks; the lower layer is a hot air channel, and the hot air channel is connected with a circulating fan and a steam hot air furnace heat exchanger through an air pipe to form closed-loop circulation, so that the hot air utilization rate is improved, and the energy consumption is reduced. The upper-layer steam is heated by hot air (the temperature is higher than 120 ℃), the space temperature of the upper-layer steam channel is kept between 100 ℃ and 110 ℃, the temperature that the space temperature of the upper-layer steam channel is lower than the dew point of the steam is avoided or reduced, the generation of condensed water is reduced, the heat utilization rate of the steam is improved, and the stable working temperature of the upper-layer space channel is met. The problem that when normal-pressure saturated steam is used in a conventional single-layer steam channel, the heating temperature of a bean curd stick forming pool is low, and the normal working temperature required by bean curd stick forming is difficult to meet is solved; or a large amount of saturated steam is needed to meet the normal working temperature required by the formation of the dried beancurd sticks, so that the problem of overlarge energy consumption is caused.

Preferably: the furnace body corresponding to the hearth is provided with a burner connector, the burner connector is convenient to connect with a burner, and biological particles, natural gas or fuel oil can be used as fuel to burn to generate heat.

Preferably: the furnace body on be provided with and observe the access hole, conveniently observe the behavior in the furnace body, and conveniently get into the maintenance.

Preferably: the smoke pipe is provided with a smoke cooling water tank which is arranged between the smoke outlet and the smoke purifying and discharging device, the smoke cooling water tank is connected with a water inlet pipe and a hot water outlet pipe, and the hot water outlet pipe is respectively connected with the water replenishing port and the slurry loading groove; and hot water is provided for the water replenishing port and the slurry filling groove. Flue gas cooling water tank including taking heat preservation water tank shell, take heat preservation water tank shell parcel outside the tobacco pipe, take the space between heat preservation water tank shell and the tobacco pipe to be the water cavity, the tobacco pipe of water cavity runs through has many water pipes, the inlet tube setting is held in the end of being close to the smoke exhaust pipe of water cavity, goes out the hot water pipe setting and holds in the end of keeping away from the smoke exhaust pipe of water cavity. Utilize flue gas heat and water to carry out the heat exchange and produce hot water, the hot water of production passes through the water pump and supplies water for steam generator, through replenishing hot water, reduces the moisturizing difference in temperature, ensures that steam lasts stable emergence, reduces the fluctuation of steam pressure, ensures the steady operation of boiling thick liquid, shaping, stoving in the dried bean processing procedure. Meanwhile, the heat energy utilization rate is improved, and the fuel consumption is reduced. In the later forming stage of the dried beancurd sticks, the soybean milk in the dried beancurd stick forming pool is reduced, and when the soybean milk depth is less than 10mm, the dried beancurd sticks are difficult to form, so that water needs to be supplemented, the generated hot water can be used as a supplement, and the forming efficiency, yield and quality of the dried beancurd sticks can be improved.

Preferably: the water-cooled grate is composed of a plurality of transverse grate pipes and longitudinal grate pipes, the transverse grate pipes are arranged at the lower parts of the longitudinal grate pipes, two ends of the longitudinal grate pipes are respectively communicated with the water clamping layer through water collecting pipes, and two ends of the transverse grate pipes are respectively communicated with the water clamping layer. The water-cooled grate adopts the structure, so that the disassembly, the assembly and the maintenance are convenient.

Preferably: two steam inlet pipes are arranged in the steam bin, extend into the middle of the steam bin from one end of the steam bin and are symmetrically arranged along the central line of the steam bin, and two cloth steam pipes extending to two ends of the steam bin are respectively connected to two sides of the tail ends of the two steam inlet pipes; the distance between the steam distribution pipes on the two sides of the tail end of the steam inlet pipe is equal to the distance between the steam distribution pipe and the center line, and the distance between the steam distribution pipe and the side wall of the steam bin is also equal. When the steam distribution holes are arranged on the steam distribution pipes on the two sides of the steam inlet pipe, the steam distribution holes on the cross section of the steam distribution pipes cannot be arranged on the same straight line and need to be arranged in a staggered mode.

The bean curd stick production and forming equipment under the normal pressure steam condition has the advantages that:

1. the back-burning normal-pressure superheated steam furnace adopts a back-burning secondary combustion technology, so that the full combustion of fuel is realized, the heat conversion efficiency is improved, and black smoke is eliminated; the method comprises the following steps of taking water as a heating medium, utilizing heat generated by a primary combustion chamber and a secondary combustion chamber of a back-burning type normal-pressure superheated steam furnace to exchange heat with a heat pair jet to generate saturated steam, then introducing the saturated steam into a heat exchanger, utilizing the heat of high-temperature flue gas to continuously heat the saturated steam, generating superheated steam with the temperature of more than 135 ℃ under the condition that the pressure is less than 0.1Mpa, utilizing the superheated steam to convey the superheated steam to a pulp cooking device for cooking pulp, wherein the pulp cooking is realized by adopting steam heating with the temperature of more than 135 ℃, increasing the heating speed, shortening the pulp cooking time, and solving the problems of overlong pulp cooking time by utilizing normal-pressure saturated steam, low benefit, excessive condensate water generated due to overlong pulp cooking, and influence; the superheated steam is conveyed to a steam bin of the dried bean forming device to heat and form the dried bean forming pool, and the superheated steam with the temperature higher than 135 ℃ is adopted to heat the dried bean forming pool, so that the temperature of a space temperature of a steam channel lower than the dew point of the steam is avoided or reduced, the generation of condensed water is reduced, the heat utilization rate of the steam is improved, and the stable working temperature of the dried bean forming pool is met; superheated steam is conveyed to a steam radiator of the drying room to form hot air, dried beancurd sticks are dried, the generation of condensed water is reduced, the drying temperature rise speed is increased, and the heat utilization rate is increased; the structure of the back-burning normal-pressure superheated steam boiler can be manufactured according to the standard of a pressure-bearing steam boiler and can also be used as the pressure-bearing steam boiler. When the machine is used for producing the dried beancurd sticks, a counter-burning normal-pressure superheated steam furnace (with the evaporation capacity of 1 ton/hour) can simultaneously provide heat for more than 3 forming grooves with the length of 18 × 1.5 meters and matched pulp boiling pots and dried beancurd sticks rooms, and the multi-shift continuous production of the dried beancurd stick processing is realized.

2. The steam inlet pipe is installed in the steam bin of the dried bean forming device, the steam inlet pipe extends into the middle of the steam bin from one end of the steam bin, two sides of the tail end of the steam inlet pipe are respectively connected with the cloth steam pipes extending to two ends of the steam bin, two sides of each cloth steam pipe are provided with the cloth steam holes, and the cloth steam holes of the cloth steam pipes are filled with steam to provide steam for the soybean milk containing tank for heating forming; the other end of the steam bin is provided with a drainage steam outlet which can drain condensed water and steam, so that potential safety hazards and accidents caused by the formation of a pressure-bearing container in the steam bin are avoided.

3. The counter-burning type normal-pressure superheated steam furnace can generate superheated steam in a normal-pressure state, can meet the requirements of large-scale production (pulp boiling, forming and drying) of the dried beancurd sticks, can meet the heat energy supply of pulp boiling, forming and drying of the dried beancurd sticks, and has high thermal efficiency and low energy consumption compared with the normal-pressure steam furnace, and the normal-pressure steam furnace refers to a steam furnace with the steam outlet pressure of less than or equal to 0.1 Mpa; compared with a pressure-bearing steam boiler, the counter-burning normal-pressure superheated steam boiler has the advantages of smaller potential safety hazard, lower technical requirements on design, manufacture and use, safer and more convenient use for users and lower use and operation cost.

4. This equipment can also utilize flue gas heat and water to carry out the heat exchange and produce hot water, and the hot water of production passes through the water pump and supplies water for steam generator, through replenishing hot water, reduces the moisturizing difference in temperature, ensures that steam lasts stable emergence, reduces the fluctuation of steam pressure, ensures the steady operation of boiling thick liquid, shaping, stoving in the dried bean processing procedure. Meanwhile, the heat energy utilization rate is improved, and the fuel consumption is reduced. In the later forming stage of the dried beancurd sticks, the soybean milk in the dried beancurd stick forming pool is reduced, and when the soybean milk depth is less than 10mm, the dried beancurd sticks are difficult to form, so that water needs to be supplemented, the generated hot water can be used as a supplement, and the forming efficiency, yield and quality of the dried beancurd sticks can be improved.

5. The bean curd stick forming device can adopt a double-layer independent channel design, the upper layer is a steam bin to directly heat the bean curd stick forming pool, and the bean curd stick forming device is characterized by being uniformly heated, stable and controllable in temperature and avoiding the phenomenon that soybean milk at the bottom of the bean curd stick forming pool is burnt due to overhigh temperature to influence the quality and the yield of bean curd sticks; the lower layer is a hot air bin which is connected with a draught fan and a heat exchanger through a return air pipe to form closed-loop circulation, so that the utilization rate of hot air is improved, and the energy consumption is reduced. The upper-layer steam is heated and insulated by hot air (the temperature is higher than 120 ℃), the space temperature of the upper-layer steam channel is kept between 100 ℃ and 110 ℃, the space temperature of the upper-layer steam channel is prevented from being lower than the dew point temperature of the steam, the generation of condensed water is reduced, the heat utilization rate of the steam is improved, and the stable working temperature of the upper-layer space channel is met. The problem that when normal-pressure saturated steam is used in a conventional single-layer steam channel, the heating temperature of a bean curd stick forming pool is low, and the normal working temperature required by bean curd stick forming is difficult to meet is solved; or a large amount of saturated steam is needed to meet the normal working temperature required by the formation of the dried beancurd sticks, so that the problem of overlarge energy consumption is caused.

Drawings

FIG. 1 is a schematic view showing the structure of a back-fire atmospheric superheated steam furnace in example 2;

FIG. 2 is a top connection schematic of FIG. 1;

FIG. 3 is a schematic left side view of FIG. 1;

FIG. 4 is a schematic diagram of direction A-A of FIG. 2;

FIG. 5 is a schematic view of FIG. 1 taken along line B-B;

FIG. 6 is a schematic diagram showing the three-dimensional structure of a back-fire atmospheric superheated steam furnace;

FIG. 7 is a schematic view showing a connecting structure of a bean curd sheet production and molding apparatus under atmospheric steam conditions;

FIG. 8 is a schematic structural view of a bean curd sheet forming apparatus;

FIG. 9 is a schematic top view of FIG. 8;

FIG. 10 is a schematic view of the direction C-C in FIG. 9;

FIG. 11 is a schematic view showing the structure of a reverse-burning atmospheric superheated steam furnace in example 5;

FIG. 12 is a schematic left side view of FIG. 11;

FIG. 13 is a schematic view from D-D of FIG. 11;

FIG. 14 is a schematic view of the E-E connection of FIG. 12;

FIG. 15 is a schematic view showing the structure of a reverse-burning atmospheric superheated steam furnace in example 8;

FIG. 16 is a schematic left side view of FIG. 15;

FIG. 17 is a schematic view of FIG. 15 taken in the direction F-F;

FIG. 18 is a schematic view of the G-G connection of FIG. 16;

the part names of the sequence numbers in the figure are:

1. a furnace base, 2, an ash removing port, 3, a secondary combustion chamber, 4, an ash discharging port, 5, a primary oxygen inlet, 6, a furnace door, 7, a hearth, 8, a furnace body, 9, a steam generator, 10, a pressure release valve, 11, a steam conduit, 12, a three-way valve, 13, a smoke passing bin, 14, a smoke discharging port, 15, a hot air outlet, 16, an air inlet, 17, a steam outlet, 18, a heat exchanger, 19, a slag removing port, 20, a secondary oxygen inlet, 21, an observation and overhaul port, 22, a burner connecting port, 23, a water supplementing port, 24, a water heating pipe, 25, a grate mounting rack, 26, a water collecting pipe, 27, a longitudinal furnace exhaust pipe, 28, a transverse furnace exhaust pipe, 29, a fire passing port, 30, a communicating pipe, 31, a water clamping layer, 32, a smoke separating chamber, 33, a heat exchange pipe, 34, a steam overheating chamber, 35, a hot air chamber, 36, a smoke purifying and discharging device, 37, a smoke cooling water tank, 39. the device comprises an induced draft fan, 40, hot air pipes, 41, a steam pipe, 42, a hot air inlet, 43, a steam inlet pipe, 44, a hot air bin, 45, a steam bin, 46, a slurry containing groove, 47, a water and steam discharging port, 48, a return air port, 49, a return air pipe, 50, a water inlet pipe, 51, a support, 52, a partition plate, 53, a clamping groove, 54, a steam distributing pipe, 55, a steam distributing hole, 56, a heat insulating layer, 57, a water tank shell with a heat insulating layer, 58, a smoke pipe, 59, a water passing pipe, 60, a smoke collecting bin, 61, a steam generating cavity, 62, a partition plate, 63, a steam superheating pipe, 64 and a steam passing port.

Detailed Description

In order to make the technical scheme and advantages of the present application clearer, the following describes clearly and completely the technical scheme of the dried beancurd stick production and forming equipment under the atmospheric steam condition with reference to the embodiment and the accompanying drawings.

Example 1

A bean curd stick production and forming device under the condition of normal pressure steam comprises a counter-burning normal pressure superheated steam furnace and a bean curd stick forming device, wherein the counter-burning normal pressure superheated steam furnace provides steam for the bean curd stick forming device for heating and forming;

the bean curd stick forming device comprises a slurry containing groove 46 and a support 51, wherein the slurry containing groove 46 is in a rectangular shape with an opening at the upper part, a plurality of partition plates 52 are arranged in the slurry containing groove 46 through clamping grooves 53, the partition plates 52 divide the interior of the slurry containing groove 46 into a plurality of forming tanks, and the forming tanks are arranged in two rows; the slurry tank 46 is mounted on the bracket 51; a steam bin 45 is arranged at the bottom of the slurry containing groove 46, a steam inlet pipe 43 is installed in the steam bin 45, the steam inlet pipe 43 extends into the middle of the steam bin 45 from one end of the steam bin 45, two sides of the tail end of the steam inlet pipe 43 are respectively connected with a cloth steam pipe 54 extending to two ends of the steam bin 45, two sides of the cloth steam pipe 54 are provided with steam distribution holes 55, steam is introduced into the steam distribution holes 55 of the cloth steam pipe 54 to provide steam for the slurry containing groove 46 for heating forming, and the other end of the steam bin 45 is provided with a drainage steam outlet 47; the outside of the steam bin 45 is wrapped with an insulating layer 56; when the steam distribution holes 55 are formed in the steam distribution pipes 54 on the two sides of the steam inlet pipe 43, the steam distribution holes 55 in the cross section of the steam distribution pipes 54 cannot be formed on the same straight line and need to be formed in a staggered mode;

the back-burning normal-pressure superheated steam furnace comprises a furnace base 1 and a furnace body 8, wherein the furnace body 8 is arranged on the furnace base 1; a hearth 7 is arranged in the furnace body 8, and water-containing layers 31 are arranged on the hearth walls on the two sides of the hearth 7; a steam generator 9 is arranged at the upper part of the hearth 7, and a pressure release valve 10 and a water replenishing port 23 are arranged on the steam generator 9; a plurality of water heating pipes 24 are transversely arranged in the steam generator 9 in a penetrating manner; the lower part of the hearth 7 is provided with a water-cooling grate through a grate mounting frame 25; the water-cooled grate is communicated with a water-holding layer 31, and the water-holding layer 31 is communicated with the steam generator 9 through a communicating pipe 30; an ash discharge port 4 and a furnace door 6 are arranged on a furnace body 8 at the front part of the hearth 7; two sides of the hearth 7 are respectively provided with a secondary combustion chamber 3 and a smoke introducing bin 13; the lower part of the secondary combustion chamber 3 is communicated with a hearth 7 through a fire hole 29, the hearth 7 is provided with a primary oxygen inlet 5, and the secondary combustion chamber 3 is provided with a secondary oxygen inlet 20; the upper part of the secondary combustion chamber 3 is communicated with one end of a water heating pipe 24, and the other end of the water heating pipe 24 is communicated with the upper part of a smoke ventilation bin 13; a heat exchanger 18 is arranged on one side of the smoke passing bin 13; a smoke distribution chamber 32 is arranged at the bottom of the heat exchanger 18, and the smoke distribution chamber 32 is communicated with the lower part of the smoke ventilation bin 13; a plurality of heat exchange tubes 33 vertically penetrate through the heat exchanger 18; the bottom end of the heat exchange pipe 33 is communicated with the smoke distributing chamber 32, the top end of the heat exchange pipe 33 is communicated with the smoke outlet 14, and the smoke outlet 14 is connected with a smoke purifying and discharging device 36 through a smoke pipe; a steam overheating cavity 34 is arranged in the heat exchanger 18, and the lower part of the steam overheating cavity 34 is communicated with the top of the steam generator 9 through a steam conduit 11; a three-way valve 12 for distributing and conveying steam is arranged on the steam conduit 11; the upper part of the steam overheating cavity 34 is provided with a steam outlet 17; the steam outlet 17 is connected to a steam inlet pipe 43 through a steam pipe 41. The secondary combustion chamber 3 is provided with an ash cleaning port 2. The smoke separating chamber 32 is provided with a slag removing opening 19.

Example 2

the back-burning normal-pressure superheated steam furnace comprises a furnace base 1 and a furnace body 8, wherein the furnace body 8 is arranged on the furnace base 1; a hearth 7 is arranged in the furnace body 8, and water-containing layers 31 are arranged on the hearth walls on the two sides of the hearth 7; a steam generator 9 is arranged at the upper part of the hearth 7, and a pressure release valve 10 and a water replenishing port 23 are arranged on the steam generator 9; a plurality of water heating pipes 24 are transversely arranged in the steam generator 9 in a penetrating manner; the lower part of the hearth 7 is provided with a water-cooling grate through a grate mounting frame 25; the water-cooled grate is communicated with a water-holding layer 31, and the water-holding layer 31 is communicated with the steam generator 9 through a communicating pipe 30; an ash discharge port 4 and a furnace door 6 are arranged on a furnace body 8 at the front part of the hearth 7; two sides of the hearth 7 are respectively provided with a secondary combustion chamber 3 and a smoke introducing bin 13; the lower part of the secondary combustion chamber 3 is communicated with a hearth 7 through a fire hole 29, the hearth 7 is provided with a primary oxygen inlet 5, and the secondary combustion chamber 3 is provided with a secondary oxygen inlet 20; the upper part of the secondary combustion chamber 3 is communicated with one end of a water heating pipe 24, and the other end of the water heating pipe 24 is communicated with the upper part of a smoke ventilation bin 13; a heat exchanger 18 is arranged on one side of the smoke passing bin 13; a smoke distribution chamber 32 is arranged at the bottom of the heat exchanger 18, and the smoke distribution chamber 32 is communicated with the lower part of the smoke ventilation bin 13; a plurality of heat exchange tubes 33 vertically penetrate through the heat exchanger 18; the bottom end of the heat exchange pipe 33 is communicated with the smoke distributing chamber 32, the top end of the heat exchange pipe 33 is communicated with the smoke outlet 14, the smoke outlet 14 is connected with a smoke pipe for discharging smoke, and the smoke pipe can be selectively connected with a smoke purifying and discharging device 36; a steam overheating cavity 34 is arranged in the heat exchanger 18, and the lower part of the steam overheating cavity 34 is communicated with the top of the steam generator 9 through a steam conduit 11; a three-way valve 12 for distributing and conveying steam is arranged on the steam conduit 11; the upper part of the steam overheating cavity 34 is provided with a steam outlet 17; the steam outlet 17 is connected to a steam inlet pipe 43 through a steam pipe 41. The secondary combustion chamber 3 is provided with an ash cleaning port 2. The smoke separating chamber 32 is provided with a slag removing opening 19.

A hot air cavity 35 is also arranged in the heat exchanger 18; the hot air cavity 35 is arranged at the upper part of the steam overheating cavity 34, the lower part of the hot air cavity 35 is provided with an air inlet 16, and the upper part of the hot air cavity 35 is provided with a hot air outlet 15; the hot air output from the hot air outlet 15 is delivered to the bottom of the steam chamber 45 to heat and insulate the steam chamber 45. The shell of the heat exchanger 18 is cylindrical or elliptical, and the interior of the heat exchanger 18 is divided into a steam overheating cavity 34 and a hot air cavity 35 from top to bottom; the heat exchange pipe 33 passes through the steam overheating cavity 34 and the hot air cavity 35; the steam conduit 11, the steam outlet 17, the air inlet 16 and the hot air outlet 15 are all in tangential communication with the normal direction of the cylindrical surface of the heat exchanger 18. The bottom of the steam bin 45 is provided with a hot air bin 44, the hot air bin 44 is arranged between the steam bin 45 and the heat insulation layer at the bottom of the steam bin, one end of the hot air bin 44 is provided with a hot air inlet 42, and the other end of the hot air bin is provided with an air return opening 48; the hot air inlet 42 is communicated with the hot air outlet 15 through the hot air pipe 40; the air return port 48 is communicated with the air inlet 16 through an air return pipe 49 and a draught fan 39, so that the circulating heating of hot air is realized; hot air is introduced into a hot air inlet 42 of the hot air bin 44 to heat and insulate steam in the steam bin 45, the steam in the steam bin 45 is maintained at 100-110 ℃, the temperature that the space temperature of the steam bin 45 is lower than the dew point of the steam is avoided or reduced, the generation of condensed water is reduced, the heat utilization rate of the steam is improved, and the stable working temperature of the slurry containing tank 46 is met.

The furnace body 8 corresponding to the hearth 7 is provided with a burner connector 22, the burner connector 22 is convenient to connect with a burner, and biological particles, natural gas or fuel oil can be used as fuel to burn to generate heat.

The furnace body 8 is also provided with an observation access hole 21, which is convenient for observing the working condition in the furnace body 8 and entering the maintenance.

The smoke pipe is provided with a smoke cooling water tank 37, the smoke cooling water tank 37 is arranged between the smoke outlet 14 and the smoke purifying and discharging device 36, the smoke cooling water tank 37 is connected with a water inlet pipe 50 and a hot water outlet pipe 38, and the hot water outlet pipe 38 is respectively connected with the water replenishing port 23 and the slurry containing groove 46; and provides hot water for the water replenishing port 23 and the slurry filling groove 46. The flue gas cooling water tank 37 comprises a water tank shell 57 with a heat-insulating layer, the water tank shell 57 with the heat-insulating layer is wrapped outside the smoke pipe 58, the space between the water tank shell 57 with the heat-insulating layer and the smoke pipe 58 is a water cavity, a plurality of water passing pipes 59 penetrate through the smoke pipe 58 in the water cavity, the water inlet pipe 50 is arranged at the end, close to the smoke exhaust port 14, of the water cavity, and the hot water outlet pipe 38 is arranged at the end, far away from the smoke exhaust port 14, of the water cavity.

The water-cooled grate is composed of a plurality of transverse grate pipes 28 and longitudinal grate pipes 27, the transverse grate pipes 28 are arranged at the lower parts of the longitudinal grate pipes 27, two ends of the longitudinal grate pipes 27 are respectively communicated with a water-clamping layer 31 through water collecting pipes 26, and two ends of the transverse grate pipes 28 are respectively communicated with the water-clamping layer 31.

Example 3

the bean curd stick forming device comprises a slurry containing groove 46 and a support 51, wherein the slurry containing groove 46 is in a rectangular shape with an opening at the upper part, a plurality of partition plates 52 are arranged in the slurry containing groove 46 through clamping grooves 53, the partition plates 52 divide the interior of the slurry containing groove 46 into a plurality of forming tanks, and the forming tanks are arranged in two rows; the slurry tank 46 is mounted on the bracket 51; the bottom of the slurry containing groove 46 is provided with a steam bin 45;

two steam inlet pipes 43 are arranged in the steam bin 45, the two steam inlet pipes 43 extend into the middle of the steam bin 45 from one end of the steam bin 45 and are symmetrically arranged by the central line of the steam bin 45, and two steam distribution pipes 54 extending to two ends of the steam bin 45 are respectively connected to two sides of the tail ends of the two steam inlet pipes 43; the distance a between the steam distribution pipes 54 on both sides of the end of the steam inlet pipe 43 is equal to the distance a between the steam distribution pipe 54 and the center line, and is equal to the distance a between the steam distribution pipe 54 and the side wall of the steam bin 45; both sides of the steam distribution pipe 54 are provided with steam distribution holes 55, steam is introduced into the steam distribution holes 55 of the steam distribution pipe 54 to provide steam for the slurry filling groove 46 for heating forming, and the other end of the steam bin 45 is provided with a water and steam discharge port 47; the outside of the steam bin 45 is wrapped with an insulating layer 56; when the steam distribution holes 55 are formed in the steam distribution pipes 54 on the two sides of the steam inlet pipe 43, the steam distribution holes 55 in the cross section of the steam distribution pipes 54 cannot be formed on the same straight line and need to be formed in a staggered mode;

the back-burning normal-pressure superheated steam furnace comprises a furnace base 1 and a furnace body 8, wherein the furnace body 8 is arranged on the furnace base 1; a hearth 7 is arranged in the furnace body 8, and water-containing layers 31 are arranged on the hearth walls on the two sides of the hearth 7; a steam generator 9 is arranged at the upper part of the hearth 7, and a pressure release valve 10 and a water replenishing port 23 are arranged on the steam generator 9; a plurality of water heating pipes 24 are transversely arranged in the steam generator 9 in a penetrating manner; the lower part of the hearth 7 is provided with a water-cooling grate through a grate mounting frame 25; the water-cooled grate is communicated with a water-holding layer 31, and the water-holding layer 31 is communicated with the steam generator 9 through a communicating pipe 30; an ash discharge port 4 and a furnace door 6 are arranged on a furnace body 8 at the front part of the hearth 7; two sides of the hearth 7 are respectively provided with a secondary combustion chamber 3 and a smoke introducing bin 13; the lower part of the secondary combustion chamber 3 is communicated with a hearth 7 through a fire hole 29, the hearth 7 is provided with a primary oxygen inlet 5, and the secondary combustion chamber 3 is provided with a secondary oxygen inlet 20; the upper part of the secondary combustion chamber 3 is communicated with one end of a water heating pipe 24, and the other end of the water heating pipe 24 is communicated with the upper part of a smoke ventilation bin 13; a heat exchanger 18 is arranged on one side of the smoke passing bin 13; a smoke distribution chamber 32 is arranged at the bottom of the heat exchanger 18, and the smoke distribution chamber 32 is communicated with the lower part of the smoke ventilation bin 13; a plurality of heat exchange tubes 33 vertically penetrate through the heat exchanger 18; the bottom end of the heat exchange pipe 33 is communicated with the smoke distribution chamber 32, the top end of the heat exchange pipe 33 is communicated with the smoke outlet 14, and the smoke outlet 14 is connected with a smoke pipe for discharging smoke; a steam overheating cavity 34 is arranged in the heat exchanger 18, and the lower part of the steam overheating cavity 34 is communicated with the top of the steam generator 9 through a steam conduit 11; a three-way valve 12 for distributing and conveying steam is arranged on the steam conduit 11; the upper part of the steam overheating cavity 34 is provided with a steam outlet 17; the steam outlet 17 is connected to a steam inlet pipe 43 through a steam pipe 41. The secondary combustion chamber 3 is provided with an ash cleaning port 2. The smoke separating chamber 32 is provided with a slag removing opening 19.

Example 4

A bean curd stick production and forming device under the condition of normal pressure steam comprises a counter-burning normal pressure superheated steam furnace and a bean curd stick forming device, wherein the counter-burning normal pressure superheated steam furnace provides steam for the bean curd stick forming device for heating and forming; the bean curd stick forming device comprises a slurry containing groove 46 and a support 51, wherein the slurry containing groove 46 is in a rectangular shape with an opening at the upper part, a plurality of partition plates 52 are arranged in the slurry containing groove 46 through clamping grooves 53, the partition plates 52 divide the interior of the slurry containing groove 46 into a plurality of forming tanks, and the forming tanks are arranged in two rows; the slurry tank 46 is mounted on the bracket 51; a steam bin 45 is arranged at the bottom of the slurry containing groove 46, a steam inlet pipe 43 is installed in the steam bin 45, the steam inlet pipe 43 extends into the middle of the steam bin 45 from one end of the steam bin 45, two sides of the tail end of the steam inlet pipe 43 are respectively connected with a cloth steam pipe 54 extending to two ends of the steam bin 45, two sides of the cloth steam pipe 54 are provided with steam distribution holes 55, steam is introduced into the steam distribution holes 55 of the cloth steam pipe 54 to provide steam for the slurry containing groove 46 for heating forming, and the other end of the steam bin 45 is provided with a drainage steam outlet 47; the outside of the steam bin 45 is wrapped with an insulating layer 56;

the back-burning normal-pressure superheated steam furnace comprises a furnace base 1 and a furnace body 8, wherein the furnace body 8 is arranged on the furnace base 1; a hearth 7 is arranged in the furnace body 8, and water-containing layers 31 are arranged on the hearth walls on the two sides of the hearth 7; a steam generator 9 is arranged at the upper part of the hearth 7, and a pressure release valve 10 and a water replenishing port 23 are arranged on the steam generator 9; a partition plate 62 which divides the upper part and the lower part of the steam generator 9 into a steam overheating cavity 34 and a steam generating cavity 61 is transversely arranged in the steam generator 9; one end of the steam overheating cavity 34 is communicated with the steam generating cavity 61 through a steam passing port 64, and the top of the other end of the steam overheating cavity 34 is provided with a steam guide pipe 11; a three-way valve 12 is arranged on the steam conduit 11; the three-way valve 12 distributes steam to boil and dry, and the three-way valve 12 is also connected with a steam inlet pipe 43 through a steam pipe 41 to provide steam for a steam bin 45; a plurality of steam superheating pipes 63 transversely penetrate through the steam superheating cavity 34; a plurality of water heating pipes 24 transversely penetrate through the steam generating cavity 61; the steam superheating pipe 63 and the water heating pipe 24 are communicated with a smoke passing bin 13 at the end close to the steam passing port 64; the end of the steam superheater 63 far away from the steam vent 64 is connected with a smoke collection bin 60, and the smoke collection bin 60 is provided with a smoke conveying pipe; the lower part of the hearth 7 is provided with a water-cooling grate through a grate mounting frame 25; the water-cooled grate is communicated with the water-containing layer 31, and the water-containing layer 31 is communicated with the steam generating cavity 61 of the steam generator 9 through a communicating pipe 30; an ash discharge port 4 and a furnace door 6 are arranged on a furnace body 8 at the front part of the hearth 7; one side of the hearth 7 is provided with a secondary combustion chamber 3; the lower part of the secondary combustion chamber 3 is communicated with a hearth 7 through a fire hole 29, the hearth 7 is provided with a primary oxygen inlet 5, and the secondary combustion chamber 3 is provided with a secondary oxygen inlet 20; the upper part of the secondary combustion chamber 3 is communicated with the end of the water heating pipe 24 far away from the steam passing port 64. The secondary combustion chamber 3 is provided with an ash cleaning port 2. The smoke ventilation bin 13 is provided with a slag removal port 19.

Example 5

The smoke conveying pipe is connected with a heat exchanger 18, the bottom of the heat exchanger 18 is provided with a smoke distribution chamber 32, and the smoke distribution chamber 32 is communicated with the smoke conveying pipe; the heat exchanger 18 is provided with a hot air chamber 35; a plurality of heat exchange tubes 33 vertically penetrate through the hot air cavity 35; the bottom end of the heat exchange pipe 33 is communicated with the smoke distributing chamber 32, the top end of the heat exchange pipe 33 is communicated with the smoke outlet 14, and the smoke outlet 14 is connected with a smoke purifying and discharging device 36 through a smoke pipe; the lower part of the hot air cavity 35 is provided with an air inlet 16, and the upper part of the hot air cavity 35 is provided with a hot air outlet 15; the hot air output from the hot air outlet 15 is delivered to the bottom of the steam chamber 45 to heat and insulate the steam chamber 45. The bottom of the steam bin 45 is provided with a hot air bin 44, the hot air bin 44 is arranged between the steam bin 45 and the heat insulation layer at the bottom of the steam bin, one end of the hot air bin 44 is provided with a hot air inlet 42, and the other end of the hot air bin is provided with an air return opening 48; the hot air inlet 42 is communicated with the hot air outlet 15 through the hot air pipe 40; the air return port 48 is communicated with the air inlet 16 through an air return pipe 49 and a draught fan 39, so that the circulating heating of hot air is realized; hot air is introduced into a hot air inlet 42 of the hot air bin 44 to heat and insulate steam in the steam bin 45, the steam in the steam bin 45 is maintained at 100-110 ℃, the temperature that the space temperature of the steam bin 45 is lower than the dew point of the steam is avoided or reduced, the generation of condensed water is reduced, the heat utilization rate of the steam is improved, and the stable working temperature of the slurry containing tank 46 is met.

Example 6

A bean curd stick production and forming device under the condition of normal pressure steam comprises a counter-burning normal pressure superheated steam furnace and a bean curd stick forming device, wherein the counter-burning normal pressure superheated steam furnace provides steam for the bean curd stick forming device for heating and forming; the bean curd stick forming device comprises a slurry containing groove 46 and a support 51, wherein the slurry containing groove 46 is in a rectangular shape with an opening at the upper part, a plurality of partition plates 52 are arranged in the slurry containing groove 46 through clamping grooves 53, the partition plates 52 divide the interior of the slurry containing groove 46 into a plurality of forming tanks, and the forming tanks are arranged in two rows; the slurry tank 46 is mounted on the bracket 51; the bottom of the slurry containing groove 46 is provided with a steam bin 45;

two steam inlet pipes 43 are arranged in the steam bin 45, the two steam inlet pipes 43 extend into the middle of the steam bin 45 from one end of the steam bin 45 and are symmetrically arranged by the central line of the steam bin 45, and two steam distribution pipes 54 extending to two ends of the steam bin 45 are respectively connected to two sides of the tail ends of the two steam inlet pipes 43; the distance a between the steam distribution pipes 54 on both sides of the end of the steam inlet pipe 43 is equal to the distance a between the steam distribution pipe 54 and the center line, and is equal to the distance a between the steam distribution pipe 54 and the side wall of the steam bin 45; the two sides of the steam distribution pipe 54 are provided with steam distribution holes 55, steam is introduced into the steam distribution holes 55 of the steam distribution pipe 54 to provide steam for the slurry filling groove 46 for heating forming, when the steam distribution pipe 54 is provided with the steam distribution holes 55, the steam distribution holes 55 on the cross section of the steam distribution pipe 54 cannot be arranged on the same straight line and need to be arranged in a staggered mode, and the other end of the steam bin 45 is provided with a water and steam drainage port 47; the outside of the steam bin 45 is wrapped with an insulating layer 56;

Example 7

the bean curd stick forming device comprises a slurry containing groove 46 and a support 51, wherein the slurry containing groove 46 is in a rectangular shape with an opening at the upper part, a plurality of partition plates 52 are arranged in the slurry containing groove 46 through clamping grooves 53, the partition plates 52 divide the interior of the slurry containing groove 46 into a plurality of forming tanks, and the forming tanks are arranged in two rows; the slurry tank 46 is mounted on the bracket 51; a steam bin 45 is arranged at the bottom of the slurry containing groove 46, a steam inlet pipe 43 is installed in the steam bin 45, the steam inlet pipe 43 extends into the middle of the steam bin 45 from one end of the steam bin 45, two sides of the tail end of the steam inlet pipe 43 are respectively connected with a cloth steam pipe 54 extending to two ends of the steam bin 45, two sides of the cloth steam pipe 54 are provided with steam distribution holes 55, steam is introduced into the steam distribution holes 55 of the cloth steam pipe 54 to provide steam for the slurry containing groove 46 for heating forming, and the other end of the steam bin 45 is provided with a drainage steam outlet 47; the outside of the steam bin 45 is wrapped with an insulating layer 56;

the back-burning normal-pressure superheated steam furnace comprises a furnace base 1 and a furnace body 8, wherein the furnace body 8 is arranged on the furnace base 1; a hearth 7 is arranged in the furnace body 8, and water-containing layers 31 are arranged on the hearth walls on the two sides of the hearth 7; the lower part of the hearth 7 is provided with a water-cooling grate through a grate mounting frame 25; the water-cooled grate is communicated with the water-containing layer 31, and the water-containing layer 31 is communicated with the steam generating cavity 61 of the steam generator 9 through a communicating pipe 30; an ash discharge port 4 and a furnace door 6 are arranged on a furnace body 8 at the front part of the hearth 7; one side of the hearth 7 is provided with a secondary combustion chamber 3; the lower part of the secondary combustion chamber 3 is communicated with a hearth 7 through a fire hole 29, the hearth 7 is provided with a primary oxygen inlet 5, and the secondary combustion chamber 3 is provided with a secondary oxygen inlet 20; a steam generator 9 is arranged at the upper part of the hearth 7, and a pressure release valve 10 and a water replenishing port 23 are arranged on the steam generator 9; a partition plate 62 which divides the upper part and the lower part of the steam generator 9 into a steam overheating cavity 34 and a steam generating cavity 61 is transversely arranged in the steam generator 9; one end of the steam overheating cavity 34 is communicated with the steam generating cavity 61 through a steam passing port 64, and the top of the other end of the steam overheating cavity 34 is provided with a steam guide pipe 11; a three-way valve 12 is arranged on the steam conduit 11; the three-way valve 12 distributes steam to boil and dry, and the three-way valve 12 is also connected with a steam inlet pipe 43 through a steam pipe 41 to provide steam for a steam bin 45; a plurality of steam superheating pipes 63 transversely penetrate through the steam superheating cavity 34; a plurality of water heating pipes 24 transversely penetrate through the steam generating cavity 61; one ends of the steam superheater 63 and the water heating pipe 24 are both connected with the smoke collection bin 60, the smoke collection bin 60 is provided with a smoke conveying pipe, and the other ends of the steam superheater 63 and the water heating pipe 24 are communicated with the secondary combustion chamber 3. The secondary combustion chamber 3 is provided with an ash cleaning port 2. The smoke collection bin 60 is provided with a slag removal port 19.

Example 8

Example 9

the bean curd stick forming device comprises a slurry containing groove 46 and a support 51, wherein the slurry containing groove 46 is in a rectangular shape with an opening at the upper part, a plurality of partition plates 52 are arranged in the slurry containing groove 46 through clamping grooves 53, the partition plates 52 divide the interior of the slurry containing groove 46 into a plurality of forming tanks, and the forming tanks are arranged in two rows; the slurry tank 46 is mounted on the bracket 51; the bottom of the slurry containing groove 46 is provided with a steam bin 45; two steam inlet pipes 43 are arranged in the steam bin 45, the two steam inlet pipes 43 extend into the middle of the steam bin 45 from one end of the steam bin 45 and are symmetrically arranged by the central line of the steam bin 45, and two steam distribution pipes 54 extending to two ends of the steam bin 45 are respectively connected to two sides of the tail ends of the two steam inlet pipes 43; the distance a between the steam distribution pipes 54 on both sides of the end of the steam inlet pipe 43 is equal to the distance a between the steam distribution pipe 54 and the center line, and is equal to the distance a between the steam distribution pipe 54 and the side wall of the steam bin 45; both sides of the steam distribution pipe 54 are provided with steam distribution holes 55, when the steam distribution pipe 54 is provided with the steam distribution holes 55, the steam distribution holes 55 on the cross section of the steam distribution pipe 54 cannot be arranged on the same straight line and need to be arranged in a staggered manner, steam is introduced into the steam distribution holes 55 of the steam distribution pipe 54 to provide steam for the slurry filling groove 46 for heating forming, and the other end of the steam bin 45 is provided with a water and steam discharge opening 47; the outside of the steam bin 45 is wrapped with an insulating layer 56;

In example 2, the working flow of the dried bean production and forming equipment under the atmospheric steam condition is as follows: water is introduced into the steam generator 9, the water also enters the water-cooling grate and the water-clamping layer 31, biomass fuel, coal, fuel oil and/or natural gas are combusted in the hearth 7 to generate radiant heat, the water in the steam generator 9, the water-cooling grate and the water-clamping layer 31 is subjected to heat exchange, under the action of a flue gas induced draft fan, flue gas generated by combustion in the hearth 7 enters the secondary combustion chamber 3 to be combusted again, the water in the communicating pipe 30 is heated, the flue gas passes through the water heating pipe 24 in the steam generator 9 and is subjected to heat exchange with the water in the steam generator 9 continuously, the flue gas passes through the heat exchange pipes 32 of the flue gas passing bin 13, the smoke distribution chamber 31 and the heat exchange bin shell 17 in sequence, and is subjected to heat exchange with condensate water through the flue gas cooling water tank 37 and then is discharged by the flue gas purification and discharge; the steam generated in the steam generator 9 is introduced into the steam overheating cavity 33 through the steam guide pipe 11 to continuously perform heat exchange with the flue gas in the heat exchange pipe 32 to generate overheated steam, the overheated steam is output from the steam outlet 16 and is introduced into the steam bin 44 through the steam pipe 41 and the cloth steam pipe 42 to heat and form the soybean milk containing tank 46, soybean milk boiled in the soybean milk containing tank 46 needs to be heated, after a proper amount of soybean milk is added, the soybean milk containing tank 46 is filled with the partition plates 52, and the soybean milk containing tank 46 is divided into a plurality of forming pools; the hot air entering from the air inlet 15 of the hot air cavity 35 exchanges heat with the flue gas in the heat exchange tube 32 to form hot air, the hot air is discharged from the hot air outlet 15, enters the hot air bin 43 through the hot air tube 39 and the hot air inlet 41, heats the steam in the steam bin 44 by utilizing the hot air, ensures that the space temperature of the upper steam channel is kept between 100 ℃ and 110 ℃, then the air is discharged from the air return port 47, and is returned to the hot air cavity 35 through the air return pipe 48 and the induced draft fan 38 for circular heating; flue gas cooling water tank 37 carries out the heat exchange with the flue gas heat and produces hot water, and the hot water of production passes through the water pump and supplies water for steam generator, through replenishing hot water, reduces the moisturizing difference in temperature, ensures that steam lasts stable the emergence, reduces the fluctuation of steam pressure, can be for dress dressing trough 46 supply hot water simultaneously to can improve dried bean forming efficiency, output and quality.

In example 5, the working flow of the dried bean production and molding equipment under the atmospheric steam condition is as follows: water is introduced into the steam generator 9, the water also enters the water-cooling grate and the water-clamping layer 31, biomass fuel, coal, fuel oil and/or natural gas are combusted in the hearth 7 to generate radiant heat, the water in the steam generator 9, the water-cooling grate and the water-clamping layer 31 is subjected to heat exchange, under the action of a flue gas induced draft fan, flue gas generated by combustion in the hearth 7 enters the secondary combustion chamber 3 to be combusted again, water in the communicating pipe 30 is heated, the flue gas passes through the water heating pipe 24 in the steam generating cavity 61 of the steam generator 9 and is subjected to heat exchange with the water in the steam generating cavity 61 continuously, the flue gas enters the smoke passing cabin 13 from the water heating pipe 24 and then enters the steam superheating pipe 63 of the steam superheating cavity 34 in the steam generator 9, the water in the steam generating cavity 61 is heated to form steam, and rises to the steam superheating cavity 34 through the steam passing port 64, continuously performing heat exchange with smoke in a steam overheating pipe 63 to form overheated steam, discharging the overheated steam from a steam guide pipe 11, distributing the steam by a three-way valve 12 to boil the soybean milk, introducing the steam into a steam bin 45 through a steam pipe 41, a steam inlet pipe 43 and a cloth steam pipe 54 to heat a soybean milk containing groove 46 so as to enable the soybean milk in a forming pool to be formed into dried beancurd sticks, heating the soybean milk subjected to soybean milk boiling in the soybean milk containing groove 46, adding a proper amount of the soybean milk, then filling a partition plate 52 into the soybean milk containing groove 46, and dividing the soybean milk containing groove 46 into a plurality of forming pools; the flue gas is introduced into the smoke collection bin 60 from the steam superheater tube 63, enters the heat exchange tube 33 of the heat exchanger 18 from the smoke separation chamber 32 through the smoke conveying tube, exchanges heat with the condensate water through the flue gas cooling water tank 37, and is discharged by the flue gas purification and discharge device 36; the hot air entering from the air inlet 16 of the hot air cavity 35 exchanges heat with the flue gas in the heat exchange tube 33 to form hot air, the hot air is discharged from the hot air outlet 15, enters the hot air bin 44 through the hot air tube 40 and the hot air inlet 42, heats the steam in the steam bin 45 by utilizing the hot air, ensures that the space temperature of the upper steam channel is kept between 100 ℃ and 110 ℃, then the air is discharged from the air return opening 48, and is returned to the hot air cavity 35 through the air return pipe 49 and the induced draft fan 39 for circular heating; the flue gas cooling water tank 37 exchanges heat with the heat of the flue gas to generate hot water, the generated hot water supplies water for the steam generator through the water pump, the water supply temperature difference is reduced by supplying hot water, continuous and stable generation of steam is ensured, fluctuation of steam pressure is reduced, and meanwhile, the hot water can be supplied to the slurry containing groove 46, so that the forming efficiency, yield and quality of the dried beancurd sticks can be improved; the hot air discharged from the hot air outlet 15 can also convey a part of the hot air to dry the formed dried beancurd sticks.

In example 8, the working procedure of the dried bean production and molding apparatus under the atmospheric steam condition is as follows: water is introduced into the steam generator 9, the water also enters the water-cooling grate and the water-clamping layer 31, biomass fuel, coal, fuel oil and/or natural gas are combusted in the hearth 7 to generate radiant heat, the water in the steam generator 9, the water-cooling grate and the water-clamping layer 31 is subjected to heat exchange, flue gas generated by combustion in the hearth 7 enters the secondary combustion chamber 3 to be combusted again under the action of a flue gas induced draft fan, the water in the communicating pipe 30 is heated, the flue gas passes through the water heating pipe 24 in the steam generation chamber 61 of the steam generator 9 and the steam superheating pipe 63 of the steam superheating chamber 34 in the steam generator 9, the flue gas in the water heating pipe 24 is subjected to heat exchange with the water in the steam generation chamber 61, the water in the steam generation chamber 61 is heated to form steam, the steam rises to the steam superheating chamber 34 through the steam passing port 64, and the steam and the flue gas in the steam superheating pipe 63 are subjected to heat exchange to form superheated steam, discharging superheated steam from the steam conduit 11, distributing the steam by a three-way valve 12 to boil the soybean milk, introducing the steam into a steam bin 45 through a steam pipe 41, a steam inlet pipe 43 and a steam distribution pipe 54 to heat the soybean milk in the forming tank to form dried beancurd sticks, heating the soybean milk boiled in the soybean milk containing tank 46, adding a proper amount of the soybean milk, then filling partition plates 52 into the soybean milk containing tank 46, and dividing the soybean milk containing tank 46 into a plurality of forming tanks; the flue gas in the water heating pipe 24 and the steam superheater 63 enters the smoke collecting bin 60, then enters the heat exchange pipe 33 of the heat exchanger 18 from the smoke distributing chamber 32 through the smoke conveying pipe, and is discharged by the flue gas purification and discharge device 36 after heat exchange with condensed water through the flue gas cooling water tank 37; the hot air entering from the air inlet 16 of the hot air cavity 35 exchanges heat with the flue gas in the heat exchange tube 33 to form hot air, the hot air is discharged from the hot air outlet 15, enters the hot air bin 44 through the hot air tube 40 and the hot air inlet 42, heats the steam in the steam bin 45 by utilizing the hot air, ensures that the space temperature of the upper steam channel is kept between 100 ℃ and 110 ℃, then the air is discharged from the air return opening 48, and is returned to the hot air cavity 35 through the air return pipe 49 and the induced draft fan 39 for circular heating; the flue gas cooling water tank 37 exchanges heat with the heat of the flue gas to generate hot water, the generated hot water supplies water for the steam generator through the water pump, the water supply temperature difference is reduced by supplying hot water, continuous and stable generation of steam is ensured, fluctuation of steam pressure is reduced, and meanwhile, the hot water can be supplied to the slurry containing groove 46, so that the forming efficiency, yield and quality of the dried beancurd sticks can be improved; the hot air discharged from the hot air outlet 15 can also convey a part of the hot air to dry the formed dried beancurd sticks.

Application examples

1. Some company in Guangxi originally uses a steam oven (the pressure is less than 0.1 Mpa) with the traditional evaporation capacity of 1 ton/hour to produce the dried beancurd sticks, and 1 atmospheric steam oven can only provide steam for two dried beancurd stick forming devices (a hot air bin is not arranged, the length is 18 meters, and the width is 1.5 meters), and the multi-shift continuous production of the dried beancurd stick processing is difficult to realize; later, the soybean milk cooking equipment in embodiment 6 is used, a counter-burning type normal-pressure superheated steam furnace (with the pressure less than 0.1 Mpa) is used for producing the dried beancurd sticks, 1 counter-burning type normal-pressure superheated steam furnace (with the evaporation capacity of 1 ton/h) can provide steam for three dried beancurd stick forming devices (provided with hot air bins, the length of 18 meters and the width of 1.5 meters), and can also provide heat sources for a soybean milk cooking pot to provide steam and dried beancurd sticks to be dried, so that the soybean milk supply requirements of the three dried beancurd stick forming devices are met, the multi-shift continuous production of dried beancurd sticks processing is realized, through incomplete statistics, the production efficiency of the dried beancurd sticks is improved by more than 30%, and the fuel cost for producing the dried beancurd sticks with the same weight is saved by.

The above description is not intended to limit the present application, and the present application is not limited to the above examples, and those skilled in the art should understand that they can make various changes, modifications, additions or substitutions within the spirit and scope of the present application.

Claims

1. A bean curd stick production and forming device under the condition of normal pressure steam comprises a counter-burning normal pressure superheated steam furnace and a bean curd stick forming device, wherein the counter-burning normal pressure superheated steam furnace provides steam for the bean curd stick forming device for heating and forming; the method is characterized in that:

the bean curd stick forming device comprises a slurry containing groove (46) and a support (51), wherein the slurry containing groove (46) is in a rectangular shape with an opening at the upper part, a plurality of partition plates (52) are arranged in the slurry containing groove (46) through clamping grooves (53), and the partition plates (52) divide the slurry containing groove (46) into a plurality of forming pools; the slurry containing groove (46) is arranged on the bracket (51); a steam bin (45) is arranged at the bottom of the slurry containing groove (46), a steam inlet pipe (43) is installed in the steam bin (45), the steam inlet pipe (43) extends into the middle of the steam bin (45) from one end of the steam bin (45), two sides of the tail end of the steam inlet pipe (43) are respectively connected with a steam distribution pipe (54) extending to two ends of the steam bin (45), steam distribution holes (55) are formed in two sides of the steam distribution pipe (54), steam is introduced into the steam distribution holes (55) of the steam distribution pipe (54) to provide steam for the slurry containing groove (46) for heating forming, and a water and steam discharge opening (47) is formed in the other end of the steam bin (45); the outside of the steam bin (45) is wrapped with an insulating layer (56);

the back-burning normal-pressure superheated steam furnace comprises a furnace base (1) and a furnace body (8), wherein the furnace body (8) is arranged on the furnace base (1); a hearth (7) is arranged in the furnace body (8), and water-clamping layers (31) are arranged on the hearth walls on the two sides of the hearth (7); a steam generator (9) is arranged at the upper part of the hearth (7), and a pressure release valve (10) and a water replenishing port (23) are arranged on the steam generator (9); a plurality of water heating pipes (24) are transversely arranged in the steam generator (9) in a penetrating way; the lower part of the hearth (7) is provided with a water-cooling grate through a grate mounting frame (25); the water-cooled grate is communicated with a water-holding layer (31), and the water-holding layer (31) is communicated with the steam generator (9) through a communicating pipe (30); an ash discharge port (4) and a furnace door (6) are arranged on a furnace body (8) at the front part of the hearth (7); two sides of the hearth (7) are respectively provided with a secondary combustion chamber (3) and a smoke introducing bin (13); the lower part of the secondary combustion chamber (3) is communicated with a hearth (7) through a fire hole (29), the hearth (7) is provided with a primary oxygen inlet (5), and the secondary combustion chamber (3) is provided with a secondary oxygen inlet (20); the upper part of the secondary combustion chamber (3) is communicated with one end of a water heating pipe (24), and the other end of the water heating pipe (24) is communicated with the upper part of a smoke ventilation bin (13); a heat exchanger (18) is arranged on one side of the smoke passing bin (13); a smoke distribution chamber (32) is arranged at the bottom of the heat exchanger (18), and the smoke distribution chamber (32) is communicated with the lower part of the smoke ventilation bin (13); a plurality of heat exchange tubes (33) vertically penetrate through the heat exchanger (18); the bottom end of the heat exchange pipe (33) is communicated with the smoke distribution chamber (32), the top end of the heat exchange pipe (33) is communicated with a smoke outlet (14), and the smoke outlet (14) is connected with a smoke pipe for discharging smoke; a steam overheating cavity (34) is arranged in the heat exchanger (18), and the lower part of the steam overheating cavity (34) is communicated with the top of the steam generator (9) through a steam conduit (11); a three-way valve (12) for distributing and conveying steam is arranged on the steam conduit (11); the upper part of the steam overheating cavity (34) is provided with a steam outlet (17); the steam outlet (17) is connected to a steam inlet pipe (43) through a steam pipe (41).

2. The dried beancurd stick production and forming equipment under the atmospheric steam condition as claimed in claim 1, wherein: a hot air cavity (35) is also arranged in the heat exchanger (18); the hot air cavity (35) is arranged at the upper part of the steam overheating cavity (34), the lower part of the hot air cavity (35) is provided with an air inlet (16), and the upper part of the hot air cavity (35) is provided with a hot air outlet (15); the hot air output by the hot air outlet (15) is conveyed to the bottom of the steam bin (45) to heat and insulate the steam bin (45).

3. A bean curd stick production and forming device under the condition of normal pressure steam comprises a counter-burning normal pressure superheated steam furnace and a bean curd stick forming device, wherein the counter-burning normal pressure superheated steam furnace provides steam for the bean curd stick forming device for heating and forming; the method is characterized in that:

the back-burning normal-pressure superheated steam furnace comprises a furnace base (1) and a furnace body (8), wherein the furnace body (8) is arranged on the furnace base (1); a hearth (7) is arranged in the furnace body (8), and water-clamping layers (31) are arranged on the hearth walls on the two sides of the hearth (7); a steam generator (9) is arranged at the upper part of the hearth (7), and a pressure release valve (10) and a water replenishing port (23) are arranged on the steam generator (9); a partition plate (62) which divides the upper part and the lower part of the steam generator (9) into a steam overheating cavity (34) and a steam generating cavity (61) is transversely arranged in the steam generator (9); one end of the steam overheating cavity (34) is communicated with the steam generating cavity (61) through a steam passing port (64), and the top of the other end of the steam overheating cavity (34) is provided with a steam guide pipe (11); a three-way valve (12) is arranged on the steam conduit (11); the three-way valve (12) distributes steam to boil and dry the pulp, and the three-way valve (12) is also connected with a steam inlet pipe (43) through a steam pipe (41) to provide steam for a steam bin (45); a plurality of steam superheating pipes (63) transversely penetrate through the steam superheating cavity (34); a plurality of water heating pipes (24) are transversely arranged in the steam generating cavity (61) in a penetrating way; the steam superheating pipe (63) and the water heating pipe (24) are communicated with a smoke passing bin (13) at the end close to the steam passing port (64); the end of the steam overheating pipe (63) far away from the steam passing port (64) is connected with a smoke collection bin (60), and the smoke collection bin (60) is provided with a smoke conveying pipe; the lower part of a hearth (7) is provided with a water-cooled grate through a grate mounting frame (25), the water-cooled grate is communicated with a water-clamping layer (31), the water-clamping layer (31) is communicated with a steam generation cavity (61) of a steam generator (9) through a communicating pipe (30), a furnace body (8) at the front part of the hearth (7) is provided with an ash discharge port (4) and a furnace door (6), one side of the hearth (7) is provided with a secondary combustion chamber (3), the lower part of the secondary combustion chamber (3) is communicated with the hearth (7) through a fire passing port (29), the hearth (7) is provided with a primary oxygen inlet (5), the secondary combustion chamber (3) is provided with a secondary oxygen inlet (20), and the upper part of the secondary combustion chamber (3) is communicated with the end, far away from a steam passing port (64.

4. A bean curd stick production and forming device under the condition of normal pressure steam comprises a counter-burning normal pressure superheated steam furnace and a bean curd stick forming device, wherein the counter-burning normal pressure superheated steam furnace provides steam for the bean curd stick forming device for heating and forming; the method is characterized in that:

the back-burning normal-pressure superheated steam furnace comprises a furnace base (1) and a furnace body (8), wherein the furnace body (8) is arranged on the furnace base (1); a hearth (7) is arranged in the furnace body (8), and water-clamping layers (31) are arranged on the hearth walls on the two sides of the hearth (7); the lower part of a hearth (7) is provided with a water-cooled grate through a grate mounting frame (25), the water-cooled grate is communicated with a water-containing layer (31), the water-containing layer (31) is communicated with a steam generation cavity (61) of a steam generator (9) through a communicating pipe (30), a furnace body (8) at the front part of the hearth (7) is provided with an ash discharge port (4) and a furnace door (6), one side of the hearth (7) is provided with a secondary combustion chamber (3), the lower part of the secondary combustion chamber (3) is communicated with the hearth (7) through a fire passing port (29), the hearth (7) is provided with a primary oxygen inlet (5), the secondary combustion chamber (3) is provided with a secondary oxygen inlet (20), the upper part of the hearth (7) is provided with the steam generator (9), the steam generator (9) is provided with a pressure release valve (10) and a water filling port (23), and a partition plate (62) which divides the upper part and the lower part of the steam generator (9) into a steam ) (ii) a One end of the steam overheating cavity (34) is communicated with the steam generating cavity (61) through a steam passing port (64), and the top of the other end of the steam overheating cavity (34) is provided with a steam guide pipe (11); a three-way valve (12) is arranged on the steam conduit (11); the three-way valve (12) distributes steam to boil and dry the pulp, and the three-way valve (12) is also connected with a steam inlet pipe (43) through a steam pipe (41) to provide steam for a steam bin (45); a plurality of steam superheating pipes (63) transversely penetrate through the steam superheating cavity (34); a plurality of water heating pipes (24) are transversely arranged in the steam generating cavity (61) in a penetrating way; one ends of the steam superheater tube (63) and the water heating tube (24) are connected with the smoke collection bin (60), the smoke collection bin (60) is provided with a smoke conveying tube, and the other ends of the steam superheater tube (63) and the water heating tube (24) are communicated with the secondary combustion chamber (3).

5. A dried bean production forming device under the atmospheric steam condition as claimed in claim 3 or 4, characterized in that: the smoke conveying pipe is connected with a heat exchanger (18), a smoke distribution chamber (32) is arranged at the bottom of the heat exchanger (18), and the smoke distribution chamber (32) is communicated with the smoke conveying pipe; the heat exchanger (18) is provided with a hot air cavity (35); a plurality of heat exchange tubes (33) vertically penetrate through the hot air cavity (35); the bottom end of the heat exchange pipe (33) is communicated with the smoke distribution chamber (32), the top end of the heat exchange pipe (33) is communicated with a smoke outlet (14), and the smoke outlet (14) is connected with a smoke pipe for discharging smoke; an air inlet (16) is arranged at the lower part of the hot air cavity (35), and a hot air outlet (15) is arranged at the upper part of the hot air cavity (35); the hot air output by the hot air outlet (15) is conveyed to the bottom of the steam bin (45) to heat and insulate the steam bin (45).

6. The dried beancurd stick production and forming equipment under the atmospheric steam condition as claimed in claim 5, wherein: the smoke pipe is provided with a smoke cooling water tank (37) and a smoke purifying and discharging device (36), the smoke cooling water tank (37) is arranged between the smoke outlet (14) and the smoke purifying and discharging device (36), the smoke cooling water tank (37) is connected with a water inlet pipe (50) and a hot water outlet pipe (38), and the hot water outlet pipe (38) is respectively connected with the water replenishing port (23) and the slurry containing groove (46); and provides hot water for the water replenishing port (23) and the slurry filling groove (46).

7. The dried beancurd stick production and forming equipment under the atmospheric steam condition as claimed in any one of claims 1 to 4, wherein: the bottom of the steam bin (45) is provided with a hot air bin (44), the hot air bin (44) is arranged between the steam bin (45) and the heat insulation layer at the bottom of the steam bin, one end of the hot air bin (44) is provided with a hot air inlet (42), and the other end of the hot air bin is provided with an air return opening (48); the hot air inlet (42) is communicated with the hot air outlet (15) through a hot air pipe (40); the air return opening (48) is communicated with the air inlet (16) through an air return pipe (49) and a draught fan (39) to realize the circulating heating of hot air; hot air is introduced into a hot air inlet (42) of the hot air bin (44) to heat and preserve heat of steam in the steam bin (45), the steam in the steam bin (45) is maintained in a certain temperature range, the temperature that the space temperature of the steam bin (45) is lower than the dew point of the steam is avoided or reduced, the generation of condensed water is reduced, the heat utilization rate of the steam is improved, and the working temperature stability of the slurry containing tank (46) is met.

8. A dried bean production forming device under the atmospheric steam condition as claimed in claim 1, 3 or 4, characterized in that: the furnace body (8) that furnace (7) correspond on be provided with combustor connector (22), the setting of combustor connector (22) is convenient for be connected with the combustor, can adopt biological particle, natural gas or fuel as the fuel burning and produce the heat.

9. A dried bean production forming device under the atmospheric steam condition as claimed in claim 1, 3 or 4, characterized in that: two steam inlet pipes (43) are arranged in the steam bin (45), the two steam inlet pipes (43) extend into the middle of the steam bin (45) from one end of the steam bin (45) and are symmetrically arranged with the central line of the steam bin (45), and two sides of the tail ends of the two steam inlet pipes (43) are respectively connected with a steam distribution pipe (54) extending to two ends of the steam bin (45); the distance between the steam distribution pipes (54) at the two sides of the tail end of the steam inlet pipe (43) is equal to the distance between the steam distribution pipes (54) and the center line, and the distance between the steam distribution pipes (54) and the side wall of the steam bin (45).

10. A dried bean production forming device under the atmospheric steam condition as claimed in claim 1, 3 or 4, characterized in that: the water-cooled grate is composed of a plurality of transverse grate pipes (28) and longitudinal grate pipes (27), the transverse grate pipes (28) are arranged at the lower parts of the longitudinal grate pipes (27), two ends of the longitudinal grate pipes (27) are respectively communicated with the water-clamping layer (31) through water collecting pipes (26), and two ends of the transverse grate pipes (28) are respectively communicated with the water-clamping layer (31).