CN210538593U - Full-automatic steam blanching equipment - Google Patents

Abstract

The utility model discloses a full-automatic steam floats boiling hot equipment belongs to agricultural product processing technology field. The automatic control system is used for controlling the steam generation system, the vacuum system, the drainage system and the material conveying device, and steam is used for continuously blanching materials, so that the equipment is simple in structure and reasonable in design, and can be conveniently fused with a processing production line; the waste heat recoverer is adopted to recover waste heat of steam subjected to material blanching treatment before the steam is pumped to the water ring vacuum pump, so that on one hand, the waste heat is utilized to heat water introduced into the steam generating system, and the processing energy consumption is obviously reduced; on the other hand, the heating rate of the water ring vacuum pump is reduced, and the working efficiency of the water ring vacuum pump is ensured. The semi-automatic vacuum pulsation blanching equipment overcomes the defects that the original vacuum pulsation blanching equipment is operated in a semi-automatic manual intermittent mode, can not meet the requirement of industrial continuous production, and solves the problems of large processing energy consumption, low production efficiency, easy secondary pollution and the like.

Description

Full-automatic steam blanching equipment

Technical Field

The utility model belongs to the technical field of the agricultural product processing, concretely relates to full-automatic steam floats boiling hot equipment.

Background

In the process of drying fruits and vegetables, because the fruits and vegetables contain peroxidase, polyphenol oxidase and the like, enzymatic browning of the fruits and vegetables is easy to occur, so that the color and the quality of the fruits and vegetables are deteriorated, and the commodity value of the dried products is seriously influenced. In order to retain the original color and quality of fruits and vegetables, a blanching method is usually adopted to inactivate enzymes in the fruits and vegetables or inhibit the activity of the enzymes, and blanching becomes one of the key technologies for drying and processing the fruits and vegetables. The traditional blanching process mainly adopts modes of hot water, normal pressure steam and the like. Wherein the problems of water-soluble and heat-sensitive nutrient component loss, material tissue ulceration and the like are easily caused by hot water blanching; the normal pressure steam blanching can effectively overcome the problem of the hot water blanching technology, but the problems of uneven material blanching, small thin layer processing loading capacity and the like caused by the fact that steam cannot rapidly transfer heat to materials due to the fact that air layer thermal resistance exists between the steam and the surfaces of the materials during the normal pressure steam blanching are solved.

Chinese patent 201410669783.2 discloses a vacuum pulsating steam blanching apparatus and a method for blanching using the same, which effectively eliminates air layer thermal resistance on the surface of a material after vacuum-steam-vacuum treatment of the material, so that high-temperature steam can be rapidly and directly contacted with the material, the temperature of the material at each position in a blanching chamber is uniformly and rapidly increased, and the blanching uniformity is improved. However, the apparatus and method have problems in that: (1) the blanching equipment and the blanching method are intermittent semi-automatic operation, each batch of material processing needs manual feeding, a pressure-bearing shell is screwed, vacuum pulsation-steam blanching is finished, the pressure-bearing shell is unscrewed, a hot material is taken out and is manually conveyed to a subsequent hot air drying link for re-distribution and processing after being cooled for a period of time, the automation degree and the production efficiency are low, the labor intensity is high, the batch continuous operation requirements cannot be met, and the problems of secondary pollution and material loss are easily caused; (2) the steam introduced into each blanching period is directly vacuumized and pumped to a vacuum system after the materials are blanched, and on one hand, the pumped steam also contains a large amount of waste heat, so that the energy waste is caused; on the other hand, these tend to cause a rapid rise in the temperature inside the vacuum pump, thereby affecting the working efficiency, working energy consumption and service life of the vacuum pump.

Disclosure of Invention

In order to solve the problem, the utility model aims to provide a full-automatic steam floats boiling hot equipment, structural design is reasonable, can be through the cooperation of each system, adopts steam to carry out continuous boiling hot to the material, and degree of automation is high.

The utility model discloses a realize through following technical scheme:

the utility model discloses a full-automatic steam blanching equipment, which comprises a blanching chamber and an automatic control system, wherein the outer part of the blanching chamber is provided with a pressure-bearing shell, the inner part of the blanching chamber is provided with a steam distributor and a material conveying device, and the steam distributor is connected with a steam generating system; the blanching chamber is connected with a vacuum system and a drainage system; the blanching chamber is provided with a material inlet and a material outlet; the automatic control system is connected with a power supply and distribution system and is respectively connected with the steam generation system, the vacuum system, the drainage system and the material conveying device;

the vacuum system comprises a water ring vacuum pump, the water ring vacuum pump is communicated with the blanching chamber through a vacuumizing pipeline, a vacuum sensor and a vacuumizing valve are arranged on the vacuumizing pipeline, and the water ring vacuum pump is connected with a vacuum pump water tank; the water ring vacuum pump, the vacuum sensor and the vacuum pumping valve are respectively connected with the automatic control system;

the vacuumizing pipeline is connected with a waste heat recoverer, the waste heat recoverer is connected with a water ring vacuum pump through a steam inlet pipeline, a vacuum check valve is installed on the steam inlet pipeline, and the waste heat recoverer and the vacuum check valve are respectively connected with an automatic control system;

during operation, materials from a higher production line enter the blanching chamber through the material inlet, are conveyed to a designated position through the material conveying device, are blanched by starting the steam generation system and the vacuum system according to processing parameters set by the automatic control system, are conveyed to the material outlet through the material conveying device, are output from the blanching chamber, enter a lower production line, and are discharged through the drainage system after being condensed by steam.

Preferably, the steam generating system comprises a steam generator, the steam generator is communicated with the steam distributor through a steam conveying pipeline, a steam inlet electromagnetic valve is arranged on the steam conveying pipeline, and a steam pressure sensor is arranged on the steam generator; the steam generator, the steam inlet electromagnetic valve and the steam pressure sensor are respectively connected with the automatic control system.

Further preferably, the steam distributor comprises a distributor main pipe and distributor branch pipes, the distributor branch pipes are symmetrically distributed along two sides of the distributor main pipe and communicated with the distributor main pipe, and a plurality of injection holes are linearly and equidistantly distributed on the distributor branch pipes along an axis.

Preferably, the pressure-bearing shell is of a double-layer structure, and a plurality of reinforcing ribs are arranged between the inner layer and the outer layer and filled with heat-insulating materials.

Preferably, the material conveying device comprises a conveying mechanism support, a photoelectric proximity switch and a plurality of conveying rollers are fixed on the conveying mechanism support, the conveying rollers are connected with a material conveying belt, and the conveying rollers provide power through a power source arranged outside the blanching chamber; the photoelectric proximity switch and the power source are connected with an automatic control system.

Further preferably, the conveying roller is connected with the power source through a permanent magnet coupling, and a bearing of the conveying roller is a ceramic bearing.

Further preferably, a steam reflecting plate is further fixed on the conveying mechanism support, is arranged at the bottom of the material conveying belt and can reflect steam penetrating through the material and the material conveying belt to the back of the material.

Preferably, a material inlet valve is arranged in the material inlet, a material outlet valve is arranged in the material outlet, and the material inlet valve and the material outlet valve are both knife-shaped vacuum gate valves.

Further preferably, the material outlet is connected with a material conveying protective cover, and a material output system is arranged in the material conveying protective cover; the material output system, the material inlet valve and the material outlet valve are respectively connected with the automatic control system.

Preferably, the automatic control system comprises a touch screen centralized controller, and the touch screen centralized controller is connected with a PLC.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses a full-automatic steam blanching equipment, which controls a steam generating system, a vacuum system, a drainage system and a material conveying device through an automatic control system, adopts steam to continuously blanch and scald materials, has simple structure and reasonable design, and can be conveniently fused with a processing production line; the vacuum system adopts a water ring vacuum pump, has simple and compact structure, convenient operation and maintenance, uniform air suction and stable and reliable work; the waste heat recoverer is adopted to recover waste heat of steam subjected to material blanching treatment before the steam is pumped to the water ring vacuum pump, so that on one hand, the waste heat is utilized to heat water introduced into the steam generating system, and the processing energy consumption is obviously reduced; on the other hand, the heating rate of the water ring vacuum pump is reduced, and the working efficiency of the water ring vacuum pump is ensured. The semi-automatic vacuum pulsation blanching equipment overcomes the defects that the original vacuum pulsation blanching equipment is operated in a semi-automatic manual intermittent mode, can not meet the requirement of industrial continuous production, and solves the problems of large processing energy consumption, low production efficiency, easy secondary pollution and the like.

Furthermore, a steam pressure sensor in the steam generation system can monitor the pressure of steam in real time, and the steam pressure sensor is adjusted in real time through the steam generator and the steam inlet electromagnetic valve, so that the degree of automation is high.

Furthermore, the steam distributor can uniformly bleach and scald the materials through the spray holes uniformly distributed on the main pipe and the branch pipes, and the blanching effect is good.

Furthermore, the pressure-bearing shell adopts a double-layer structure, and reinforcing ribs are arranged between the double layers, so that the strength of the pressure-bearing shell can be improved, and the safety and the stability are improved; the filled heat insulation material can reduce heat dissipation and save energy consumption.

Furthermore, a photoelectric proximity switch is arranged in the conveying mechanism, so that a signal can be sent out when the materials approach, and automatic operation is realized.

Furthermore, the conveying roller is connected with the power source through the permanent magnet coupler, so that on one hand, a good sealing effect is realized while the conveying roller is driven, and on the other hand, the problems that in a conventional shaft sealing mode, under the environment of high-temperature steam, the service life of a sealing accessory is shortened, sealing liquid volatilizes to generate gas polluting food and the like are solved; the vacuum degree and the steam pressure required by the blanching processing are ensured, and the blanching processing effect of the material and the reliable operation of the equipment are ensured. The bearing of carrying the cylinder adopts ceramic bearing, can be applied to high temperature and high humidity's boiling hot environment and float in the environment, if select for use ordinary bearing, the high temperature and high humidity environment can make the grease inefficacy in the bearing on the one hand, causes volatilizing of grease on the one hand, to the pollution of blanching product, and ceramic bearing has advantages such as high temperature and high humidity resistant, self-lubricating, non-maintaining, can be applied to the occasion of high vacuum.

Furthermore, the steam reflecting plate reflects the steam passing through the material conveying belt and the material layer to the back of the material, so that the steam blanching is more thorough and uniform, and the steam blanching device is high in efficiency and good in effect.

Further, a knife-type vacuum gate valve is adopted to seal the material inlet and the material outlet, so that the valve is controlled to be opened and closed quickly and the required sealing performance is achieved; the vacuum degree and the steam pressure required by the blanching processing are ensured, and the blanching processing effect of the material and the reliable operation of the equipment are ensured.

Furthermore, the material conveying protective cover can prevent the materials from being polluted by pollutants in the process of conveying the materials to the subsequent processing procedures after the materials are blanched, mildewed and sterilized; the material output system sends the material to the next-level processing equipment in a pollution-free manner, and continuous processing of the blanching equipment is guaranteed.

Furthermore, the automatic control system is controlled by a PLC program, parameters such as steam pressure, steam temperature, vacuum degree, vacuum time, vacuum duration, blanching time, pulsation cycle frequency and the like are set through the touch screen integrated controller, and various valves, motors and pumps in the processing flow are controlled, so that automatic processing production of vacuum pulsation steam blanching is realized.

Drawings

FIG. 1 is a schematic front view of the overall structure of the present invention;

FIG. 2 is a schematic side view of the overall structure of the present invention;

FIG. 3 is a schematic cross-sectional view of the blanching chamber of the present invention;

fig. 4 is a schematic three-dimensional structure diagram of the steam distributor of the present invention.

In the figure: 1 frame, 2 rear-stage conveying belt, 3 blanking baffle, 4 material outlet valve, 5 motor, 6 steam reflecting plate, 7 conveying roller, 8 heat preservation layer, 9 material inlet valve, 10 feeding baffle, 11 vacuum sensor, 12 touch screen integrated controller, 13 front-stage conveying belt, 14 distribution box, 15 condensed water discharge valve, 16 condensed water discharge pipe, 17 vacuum pumping pipe, 18 air inlet pipe, 19 water inlet pipe, 20 exhaust pipe, 21 water discharge pipe, 22 water ring vacuum pump, 23 vacuum pump water tank, 24 discharge valve, 25 water tank bracket, 26 waste heat recoverer, 27 steam generator, 28 steam pressure sensor, 29 steam distributor, 30 steam inlet electromagnetic valve, 31 steam conveying pipe, 32 vacuum check valve, 33 outer skin, 34 pressure-bearing shell, 35 material conveying belt, 36 ceramic bearing, 37 conveying mechanism bracket, 38 vacuum pumping valve, 39 photoelectric proximity switch, 39 material outlet valve, 5 motor, 6 steam reflecting plate, 7 conveying roller, 8 heat preservation layer, 9 material inlet valve, 10 feeding, 40 permanent magnet couplings, 41 reducers, 42 blanching chambers, 43 material outlets, 44 material inlets, 45 sealing gaskets, 46 material conveying protective covers, 47 reinforcing ribs, 48 distributor main pipes, 49 distributor branch pipes and 50 spray holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, which are included to illustrate and not to limit the present invention:

as fig. 1, fig. 2, for the utility model discloses a full-automatic steam floats boiling hot equipment, as fig. 3, pressure-bearing casing 34 is fixed in frame 1, and overall structure is square cavity, and pressure-bearing casing 34 adopts bilayer structure, and the inlayer adopts thickness to make for 4 ~ 8 mm's stainless steel, and adopts strengthening rib 47 to strengthen to its structure, and strengthening rib 47 selects No. 6 channel-section steel, and the skin 33 of outer stainless steel that is fills thickness for 40 ~ 120 mm's insulation material in the middle of the inlayer, 34 inside cavity of pressure-bearing casing is blanching room 42, for the place that the pulsation blanched processing, installs at the comdenstion water discharge pipe 16 intercommunication comdenstion water discharge valve 15 and blanching room 42 of pressure-bearing casing bottom, and the comdenstion water discharge pipe 16 of following the bottom that will scald the in-process and float and produce gets rid.

The steam generating system comprises a steam generator 27, a steam conveying pipeline 31, a steam pressure sensor 28, a steam inlet electromagnetic valve 30 and a steam distributor 29, wherein the steam generator 27 is positioned outside a pressure-bearing shell 34 and behind the pressure-bearing shell 34 and is connected with the pressure-bearing shell 34 through the steam conveying pipeline 31, the steam inlet electromagnetic valve 30 is arranged on the steam conveying pipeline 31, the steam pressure sensor 28 is installed above the steam generator 27 and can monitor the pressure of steam in real time, and the steam distributor 29 is arranged in the pressure-bearing shell 34 and is connected with the steam conveying pipeline 31 and positioned above a material conveying belt 35.

As shown in fig. 4, the steam distributor 29 is a multi-pipe type air flow distributor, and is composed of a distributor main pipe 48 and a plurality of distributor branch pipes 49 with injection holes 50, wherein the distributor branch pipes 49 are symmetrically distributed along the distributor main pipe 48, and the total number of the distributor branch pipes 49 is 10-30. The steam pipe is made of 304 austenitic stainless steel with phi 15 multiplied by 1.5 through welding, 50-150 phi 3 circular jet holes are formed in the steam pipe in total, and the jet holes 50 are linearly and equidistantly distributed along the axis of the distributor branch pipe 48. Steam generated by the steam generator 27 firstly passes through the steam conveying pipeline 31, then enters the steam distributor 29, passes through the distributor main pipe 48, and is uniformly sprayed out from the spray holes 50 on the distributor branch pipe 49 to scald the materials. The steam conveying pipeline 31 is wrapped with an insulating layer.

The vacuum system comprises a water ring vacuum pump 22, a vacuum pumping valve 38, a waste heat recoverer 26, a vacuum check valve 32, a vacuum sensor 11, a vacuum pumping pipeline 17, a vacuum pump water tank 23 and a water tank support 25. The vacuum pump 22 is positioned below the pressure-bearing shell 34 and is connected with the pressure-bearing shell 34 through a vacuum-pumping pipeline 17, the vacuum-pumping pipeline 17 is provided with a vacuum sensor 11 and a vacuum-pumping valve 38, one end of a waste heat recoverer 26 is connected with the vacuum-pumping pipeline 17, the other end of the waste heat recoverer is connected with the water ring vacuum pump 22 through an air inlet pipeline 18, the air inlet pipeline 18 is provided with a vacuum check valve 32, the vacuum pump water tank 23 is connected with the water ring vacuum pump 22 and is fixed on a water tank support 25, the bottom of the vacuum pump water tank 23 is provided with a discharge valve 24, and the vacuum system is connected with the pressure; the vacuum-pumping pipeline 17 is wrapped with an insulating layer.

The waste heat recoverer 26 is a heat pipe type waste heat recoverer, the heat pipe is a heat transfer element with extremely high heat conductivity, the waste heat recovery efficiency can be greatly improved by taking the heat pipe as a heat transfer element, and a single heat pipe is easy to detach and replace, simple to maintain and low in maintenance cost. Heat pipe formula waste heat recoverer 26 installs on evacuation pipeline 17, can be with the steam waste heat recovery after blanching on the one hand, can be used to heat the water that lets in steam generator 27, and on the other hand has reduced by the inspiratory steam temperature of water ring vacuum pump 22, has reduced water ring vacuum pump 22's rate of rise, has guaranteed its work efficiency.

The material conveying system is divided into an inner part and an outer part; the external material conveying system consists of a front-stage conveying belt 13, a rear-stage conveying belt 2 and a material conveying protective cover 46, wherein the front-stage conveying belt 13 is positioned right above the feeding blocking opening 10, the rear-stage conveying belt 2 is positioned right below the discharging blocking opening 3, the material conveying protective cover 46 is arranged outside the rear-stage conveying belt, the material conveying protective cover 46 is formed by welding stainless steel plates, the whole structure is a hollow cuboid structure, a feeding hole with the same shape and size as the discharging blocking opening 3 is formed in the material conveying protective cover 46 corresponding to the position of the discharging blocking opening 3, and the feeding hole is in butt joint with the discharging blocking opening 3; the protective cover can prevent the materials from being stained with pollutants in the process of conveying the materials to the subsequent processing procedures after blanching, sterilization and sterilization; the whole material conveying system ensures the continuous processing of the blanching equipment;

the internal conveying system consists of a material conveying belt 35, a conveying roller 7, a conveying mechanism bracket 37, a motor 5, a speed reducer 41, a photoelectric proximity switch 39, a steam reflecting plate 6 and a ceramic bearing 36 with a stainless steel support, and the internal conveying system, except the motor 5 and the speed reducer 41, is arranged in a pressure-bearing shell 34; the material conveyer belt 35 is positioned below the steam distributor 29 and supported on the conveyer roller 7, and the conveyer roller 7 is fixed on a conveyer mechanism bracket 37 connected with the pressure-bearing shell 34; a steam reflection plate 6 is arranged below the material conveying belt 35, the steam reflection plate 6 is arranged on the conveying mechanism support 37 and can reflect steam which penetrates through the material conveying belt 35 and a material layer to the back of the material, so that the material can be blanched more uniformly and thoroughly, the photoelectric proximity switch 39 is arranged on the conveying mechanism support 37, the mounting position corresponds to the tail end of the material conveying belt 35 and is used for detecting the material condition on the material conveying belt 35, the shaft of the speed reducer 41 is connected with the shaft of the conveying roller 7 through the permanent magnet coupler 40, the speed reducer 41 is connected with the motor 5, is arranged right in front of the outer part of the pressure-bearing shell 34 and is fixed on the rack 1, and the motor 5 provides power for an internal conveying; the photoelectric proximity switch can be an M18 photoelectric proximity switch, and can normally work in a blanching processing environment with high temperature and high humidity. The material conveyer belt 35 is a special grid conveyer belt for Teflon food grade, the grid width is 500mm, and the meshes are square meshes.

The sealing system comprises a material inlet valve 9, a material outlet valve 4, a feeding baffle 10, a discharging baffle 3, a sealing gasket 45 and a permanent magnet coupler 40; a material feeding baffle 10 and a material discharging baffle 3 are arranged right above and right below the material inlet 44 and the material outlet 43, and the material inlet valve 9 and the material outlet valve 4 are fixedly connected with the material inlet 44, the material feeding baffle 10, the material outlet 43 and the material discharging baffle 3 through flanges respectively. The upper and lower parts of the pressure-bearing shell 34 are sealed by sealing gaskets 45, and the shaft of the inner conveying roller 7 and the shaft of the outer motor 5 are in transmission connection and sealing by a permanent magnet coupling 40. The permanent magnet coupling can adopt IPMC03, can bear higher pressure and can realize the non-contact fully-closed sealing function of required sealing components.

The automatic control system comprises a PLC and a touch screen integrated controller 12, wherein the touch screen integrated controller 12 is connected with a steam pressure sensor 28, a steam inlet valve 30, a steam generator 27, a vacuum pump 22, a vacuumizing valve 38, a vacuum check valve 32, a vacuum sensor 11, a motor 5, a photoelectric proximity switch 39, a front-stage conveying belt 13 and a rear-stage conveying belt 2 on the steam generator 27. The touch screen integrated controller 12 can display and control data in the blanching process, so that continuous production of vacuum pulsation steam blanching is realized. And a PLC program is selected for control, and the touch screen integrated controller 12 controls each valve, motor and pump in the process flow through the set values or measured values of steam pressure, steam temperature, vacuum degree, vacuum time, vacuum duration, blanching time and pulsation cycle number, so that the automatic processing production of vacuum pulsation steam blanching is realized.

The automatic control system and the remaining systems and components are powered through a power distribution box 14.

The utility model discloses a concrete working process:

setting parameters, namely setting steam pressure value, steam temperature value, vacuum degree, vacuum duration, blanching time, pulse cycle number and the like required in the process flow on the touch screen integrated controller 12, and starting a system to operate the system;

starting the front-stage conveyer belt 13 and the internal conveyer belt 35, opening the material inlet valve 9, the front-stage conveyer belt 13 and the internal conveyer belt 35 to slowly move at the speed of 0.1m/s, conveying the blanched material to the position above the material inlet valve 9 from the front-stage conveyer belt 13, allowing the material to fall onto the material conveyer belt 35 in the blanching chamber 42 through the feeding blocking opening 10 and the material inlet valve 9, when the photoelectric proximity switch 39 at the tail end of the material conveyer belt 35 detects that the material is conveyed to the position, indicating that the material is conveyed to the designated position, stopping the front-stage conveyer belt 13 and the rear-stage conveyer belt 2 at the moment, and closing the material inlet valve 9;

vacuumizing, namely, the system automatically opens a vacuumizing valve 38, starts a water ring vacuum pump 22, when the vacuum degree value detected by a vacuum sensor 11 reaches a set value, the touch screen integrated controller 12 continues vacuumizing for a period of time according to the set vacuum duration, the vacuum duration is 30-60 s, then closes the vacuumizing valve 38, stops the vacuum pump 22, and finishes vacuumizing operation at the moment, namely, air layer thermal resistance between materials and in the materials is completely eliminated;

opening the steam inlet electromagnetic valve 30, introducing steam according to the set blanching time, wherein the blanching time is 30-120 s, the steam is uniformly distributed by a steam distributor 29 and then is directly sprayed on the surface of the material, the surface of the material is rapidly heated to the enzyme and sterilization temperature, so that the blanching, enzyme and sterilization effects are achieved, when the blanching time reaches the set value, closing the steam inlet electromagnetic valve 30, and finishing the primary steam blanching process;

the third step, the fourth step, a vacuum pulse steam blanching period, and the subsequent step, the system automatically circulates the vacuum pulse steam blanching period according to the set pulse circulation times, wherein the pulse circulation times are 1-3 times;

sixthly, conveying the blanched materials, namely automatically opening a material outlet valve 4, enabling a material conveying belt 35 and a rear-stage conveying belt 2 to run simultaneously, enabling the materials to fall from the material conveying belt 35, enabling the materials to reach the rear-stage conveying belt 2 provided with a material conveying protective cover 46 through the material outlet valve 4 and a blanking blocking opening 3, conveying the materials to the next processing process, meanwhile, automatically opening a condensed water discharge valve 15, discharging condensed water generated in the blanching process, stopping running of the material conveying belt 35 when a photoelectric proximity switch 39 at the tail end of the material conveying belt 35 detects that no materials exist on the material conveying belt 35, closing the material outlet valve 4, starting blanching cycle processing of the next batch of materials when the complete blanching processing process is finished, and in the pulsating blanching process, steam and waste gas which are blanched enter a waste heat recoverer 26 through a vacuum pumping pipeline 17 each time when vacuum is pumped, enabling the steam and waste heat to enter a vacuum pump 22 and a water tank 23 after the steam and the waste heat energy is recovered by the vacuum pump 27 to be used for heating or supplying the water of a steam generator 27 to other processing processes, so that the temperature rise is reduced.

The utility model discloses a conveyer belt type vacuum pulsation steam blanching equipment is applicable in blanching process of agricultural products such as most of vegetables and fruits, Chinese herbal medicine class.

While the foregoing is directed to embodiments of the present invention, other and further modifications and embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims (10)

1. The full-automatic steam blanching equipment is characterized by comprising a blanching chamber (42) and an automatic control system, wherein a pressure bearing shell (34) is arranged outside the blanching chamber (42), a steam distributor (29) and a material conveying device are arranged inside the blanching chamber (42), and the steam distributor (29) is connected with a steam generating system; the blanching chamber (42) is connected with a vacuum system and a drainage system; a material inlet (44) and a material outlet (43) are arranged on the blanching chamber (42); the automatic control system is connected with a power supply and distribution system and is respectively connected with the steam generation system, the vacuum system, the drainage system and the material conveying device;

the vacuum system comprises a water ring vacuum pump (22), the water ring vacuum pump (22) is communicated with the blanching chamber (42) through a vacuum-pumping pipeline (17), a vacuum sensor (11) and a vacuum-pumping valve (38) are arranged on the vacuum-pumping pipeline (17), and the water ring vacuum pump (22) is connected with a vacuum pump water tank (23); the water ring vacuum pump (22), the vacuum sensor (11) and the vacuum pumping valve (38) are respectively connected with an automatic control system;

the vacuumizing pipeline (17) is connected with a waste heat recoverer (26), the waste heat recoverer (26) is connected with a water ring vacuum pump (22) through a steam inlet pipeline (18), a vacuum check valve (32) is installed on the steam inlet pipeline (18), and the waste heat recoverer (26) and the vacuum check valve (32) are respectively connected with an automatic control system.

2. The full-automatic steam blanching equipment according to claim 1, wherein the steam generating system comprises a steam generator (27), the steam generator (27) is communicated with a steam distributor (29) through a steam conveying pipeline (31), a steam inlet electromagnetic valve (30) is arranged on the steam conveying pipeline (31), and a steam pressure sensor (28) is arranged on the steam generator (27); the steam generator (27), the steam inlet solenoid valve (30) and the steam pressure sensor (28) are respectively connected with an automatic control system.

3. The full-automatic steam blanching apparatus according to claim 2, wherein the steam distributor (29) comprises a distributor main pipe (48) and distributor branch pipes (49), a plurality of distributor branch pipes (49) are symmetrically distributed along both sides of the distributor main pipe (48) and communicated with the distributor main pipe (48), and a plurality of injection holes (50) are linearly and equidistantly distributed on the distributor branch pipes (49) along an axis.

4. The full automatic steam blanching apparatus according to claim 1, wherein the pressure bearing housing (34) is a double layer structure, a plurality of reinforcing ribs (47) are arranged between the inner layer and the outer layer and filled with thermal insulation material.

5. The full-automatic steam blanching equipment according to claim 1, wherein the material conveying device comprises a conveying mechanism bracket (37), a photoelectric proximity switch (39) and a plurality of conveying rollers (7) are fixed on the conveying mechanism bracket (37), the conveying rollers (7) are connected with a material conveying belt (35), and the conveying rollers (7) are powered by a power source arranged outside the blanching chamber (42); the photoelectric proximity switch (39) and the power source are connected with an automatic control system.

6. The full-automatic steam blanching apparatus according to claim 5, wherein the transport drum (7) is connected with a power source through a permanent magnet coupling (40), and the bearings of the transport drum (7) are ceramic bearings (36).

7. The full-automatic steam blanching equipment according to claim 5, wherein a steam reflecting plate (6) is further fixed on the conveying mechanism bracket (37), and the steam reflecting plate (6) is arranged at the bottom of the material conveying belt (35) and can reflect steam which passes through the material and the material conveying belt (35) to the back of the material.

8. The full-automatic steam blanching equipment according to claim 1, wherein a material inlet valve (9) is arranged in the material inlet (44), a material outlet valve (4) is arranged in the material outlet (43), and both the material inlet valve (9) and the material outlet valve (4) adopt knife-type vacuum gate valves.

9. The full-automatic steam blanching equipment according to claim 8, wherein the material outlet (43) is connected with a material conveying protective cover (46), and a material output system is arranged inside the material conveying protective cover (46); the material output system, the material inlet valve (9) and the material outlet valve (4) are respectively connected with the automatic control system.

10. The full-automatic steam blanching device according to claim 1, wherein the automatic control system comprises a touch screen centralized controller (12), and the touch screen centralized controller (12) is connected with a PLC.

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