CN212193628U - Evaporate and press sand air entrainment building block brick to evaporate and press cauldron tail gas processing apparatus - Google Patents
Evaporate and press sand air entrainment building block brick to evaporate and press cauldron tail gas processing apparatus Download PDFInfo
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- CN212193628U CN212193628U CN202020765960.8U CN202020765960U CN212193628U CN 212193628 U CN212193628 U CN 212193628U CN 202020765960 U CN202020765960 U CN 202020765960U CN 212193628 U CN212193628 U CN 212193628U
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Abstract
The utility model relates to an evaporate and press sand air entrainment building block brick to evaporate and press cauldron tail gas processing apparatus belongs to and evaporates and presses sand air entrainment building block brick production auxiliary assembly technical field. The tail gas treatment device for the autoclaved sand aerated block brick autoclave comprises a steam source box, a steam generator, a waste heat utilization mechanism, a tail gas purification mechanism, a steam inlet main pipe, a steam outlet main pipe and a plurality of autoclaves; the steam source box is communicated with the steam inlet main pipe through a steam source valve; the steam inlet main pipe is communicated with an inlet of the still kettle through a steam inlet branch pipe and a steam pressure regulating valve; a tail gas outlet of the still kettle is communicated with a steam outlet main pipe through a steam outlet branch pipe and a steam outlet valve; the steam outlet main pipe is communicated with a heating inlet of the steam generator through a switch valve A. The device for treating the tail gas of the still kettle solves the problems of low heat utilization rate, low working efficiency and high failure rate existing in the conventional method for treating the tail gas of the still kettle by using autoclaved sand aerated block bricks; the requirement of autoclaved sand aerated block brick production and use is met.
Description
Technical Field
The utility model relates to an evaporate and press sand air entrainment building block brick to evaporate and press cauldron tail gas processing apparatus belongs to and evaporates and presses sand air entrainment building block brick production auxiliary assembly technical field.
Background
The autoclaved aerated building block is prepared by adding an air-entraining agent into the ingredients of calcareous materials (cement, lime and the like) and siliceous materials (sand, fly ash and the like), adding water, stirring, pouring and forming, inflating by gas, pre-curing in a pre-curing chamber, performing static curing in a static stopping chamber, cutting, and then performing autoclaved curing in an autoclave.
In the process of carrying out autoclaved curing on the autoclaved sand aerated building block by the autoclave, the autoclave needs to carry out tail gas evacuation operation; the main components in the tail gas of the still kettle of the autoclaved sand aerated block brick are water vapor, a little dust generated in the curing process and the smell emitted by the autoclaved sand aerated block; in the traditional production process, enterprises always adopt a direct emptying mode for treatment, and the problem of environmental pollution exists. In addition, the direct emission of the tail gas of the autoclaved sand aerated block brick still has the problem of energy waste. Meanwhile, the pre-curing treatment in the pre-curing chamber and the static curing treatment in the static stopping chamber consume a large amount of energy to maintain the indoor temperature; there is a problem of large energy consumption.
In order to solve the above problems, there is a tail gas treatment device in the market at present, for example, a still kettle system disclosed in the patent with the publication number of CN105291257B, in which tail gas is introduced into a steam extraction pipe and introduced into other still kettles to be used as a preheating energy source, so as to complete tail gas recovery; although it achieves the purpose of recovering all the tail gas, it has the following problems:
1. the existing still kettle enters other still kettles through a steam extraction pipe in a natural pressure reduction mode during air exhaust, and the problem that the working efficiency of the still kettle is low due to the fact that the natural pressure reduction time of the still kettle is too long as the still kettle is in a sealed circulation mode exists.
2. After the pressure of the existing still kettle is naturally reduced, the residual tail gas needs to be introduced into an external heat source to heat the existing still kettle, and then the residual tail gas is introduced into other still kettles to be used as preheating energy. Because the residual tail gas is heated by adopting an external heat source, a heat exchange process exists, certain heat loss is certainly caused, the external heat source is not directly introduced into the autoclave for utilization, and the problem of low heat utilization rate exists.
3. The steam-pressing sand aerated building block brick still kettle tail gas contains other impurities such as dust besides water vapor, and when the steam-pressing sand aerated building block brick still kettle tail gas is directly introduced into other still kettles to be used as preheating energy, the problem of high failure rate of the still kettle caused by the problems of easy scaling and the like exists.
Therefore, it is necessary to develop a device for treating the tail gas of the still kettle of the autoclaved sand aerated block brick aiming at the problems, so that the device can effectively utilize the waste heat of the tail gas of the still kettle and can achieve the purpose of optimizing the production environment.
Disclosure of Invention
The utility model aims to provide a: the tail gas treatment device for the autoclaved sand aerated building block kettle is simple in structure and convenient to use, and solves the problems that the existing autoclaved sand aerated building block brick kettle tail gas treatment mode is low in heat utilization rate, low in working efficiency and high in failure rate.
The technical scheme of the utility model is that:
a tail gas treatment device of a still kettle for autoclaved sand aerated building block bricks comprises a steam source box, a steam generator, a waste heat utilization mechanism, a tail gas purification mechanism, a steam inlet main pipe, a steam outlet main pipe and a plurality of still kettles; the steam source box is communicated with the steam inlet main pipe through a steam source valve; the steam inlet main pipe is communicated with an inlet of the still kettle through a steam inlet branch pipe and a steam pressure regulating valve; the method is characterized in that: a tail gas outlet of the still kettle is communicated with a steam outlet main pipe through a steam outlet branch pipe and a steam outlet valve; the steam outlet main pipe is communicated with a heating inlet of the steam generator through a switch valve A; a heating outlet of the steam generator is connected with a steam outlet main valve through a pipeline; the steam outlet main valve is communicated with the tail gas purification mechanism through a switch valve B; the steam outlet main valve is communicated with the waste heat utilization mechanism through a switch valve C; the steam outlet of the steam generator is communicated with the steam inlet main pipe through a steam supplementing valve; and the steam outlet main pipe is communicated with the tail gas purification mechanism through a discharge valve and a switch valve B.
The steam generator consists of a main cylinder body, a steam drum, a water replenishing valve, an end enclosure, a sealing partition plate and a heat exchange pipe; the upper end of the main cylinder body is communicated with a steam drum; the steam pocket is communicated with the steam inlet main pipe through a steam outlet and a steam supplementing valve of the steam pocket; the sealing partition plates are symmetrically and fixedly arranged in the main cylinder body; a plurality of heat exchange tubes are arranged between the sealing clapboards in a specification shape; a water replenishing valve is connected on the main cylinder body between the sealing partition plates; the water replenishing valve is communicated with an external water source; seal heads are respectively and fixedly arranged at two ends of the main cylinder body; the end socket at one end of the main cylinder body is communicated with the switch valve A through a heating inlet of the end socket; and the seal head at the other end of the main cylinder body is communicated with a main steam outlet valve through a heating outlet of the seal head.
The steam pocket is connected with a safety valve.
The tail gas purification mechanism consists of a sealed cooling tank, a heat dissipation water tank, a conveying fan, a purifier and a spray water pump; a sealed cooling pool is arranged on the bank side of one side of the heat dissipation water pool; a partition wall is arranged in the middle of the sealed cooling pool; the upper surface of the partition wall is hermetically connected with the top of the sealed cooling pool; the end heads at two ends of the partition wall are respectively provided with a certain gap with two ends of the sealed cooling pool; one end of the sealed cooling pool on one side of the partition wall is connected with an air inlet pipe; the air inlet pipe is communicated with the switch valve B; the sealed cooling pool on the other side of the partition wall is connected with a purifier on the sealed cooling pool through an exhaust pipe and a conveying fan; the purifier is communicated with the heat dissipation water tank through a pipeline and a spray water pump; the side of the sealed cooling pool is connected with an overflow pipe A, and the overflow pipe A is communicated with the heat dissipation water pool.
The inner parts of the sealed cooling pools on the two sides of the partition wall are respectively provided with a spray branch pipe; one end of the spraying branch pipe is connected with a spraying main pipe, and one end of the spraying main pipe penetrates out of the sealed cooling tank and is communicated with the heat dissipation water tank through a pipeline and a spraying water pump.
The air inlet direction of the air inlet pipe is consistent with the transverse direction of the partition wall; the vertical position of the air inlet pipe is higher than that of the overflow pipe A.
The air inlet pipe is provided with an emptying pipe through an emptying valve.
The purifier consists of an assembly box body, a bracket and a spray header; an assembly box body is fixedly arranged above the heat dissipation water pool through a bracket; the interior of the assembly box body is divided into an air storage chamber and an adsorption chamber by a partition plate; one side of the air storage chamber is communicated with an outlet of the conveying fan; the top of the adsorption chamber is provided with a spray head which is communicated with the heat dissipation water pool through a pipeline and a spray water pump; a plurality of activated carbon layers are arranged in the adsorption chamber below the spray header at intervals through a grid; the partition plate between the activated carbon layers is provided with a vent hole; a diatomite layer is arranged below the active carbon layer; the assembly box body below the diatomite layer is in an open state.
The waste heat utilization mechanism comprises a gas distribution cylinder, a heating coil A, a heating coil B, a pre-curing chamber, a static stop chamber, a water mixing tank, a pressure pump A and a pressure pump B: a heating coil A and a water mixing tank are arranged in the static stop chamber; a heating coil B is arranged in the pre-curing chamber; the water mixing tank is communicated with one end of the heating coil A through a pressure pump A; the water mixing tank is communicated with one end of the heating coil B through a pressure pump B; the other end of the heating coil A and the other end of the heating coil B are communicated with a water mixing tank; the water mixing tank is communicated with the switch valve C through a steam transmission pipe and a steam distributing cylinder.
The steam distributing cylinder consists of a steam distributing cylinder body and a drain valve; one side of the steam-distributing cylinder body is provided with a steam inlet, and the steam-distributing cylinder body is communicated with the switch valve C through the steam inlet; the upper end of the steam-distributing cylinder body is provided with a steam outlet which is communicated with the water mixing tank through a switch valve D and a steam conveying pipe; the lower end of the cylinder body is provided with a drain port which is connected with a drain valve.
And a steam stop plate is fixedly arranged in the steam distributing cylinder body at one side of the steam inlet in an inclined manner through a support plate.
The pre-curing chamber and the static stopping chamber are respectively provided with a temperature sensor; the temperature sensor in the pre-curing chamber is electrically connected with the pressure pump B; and the temperature sensor in the static stop chamber is electrically connected with the pressure pump A.
An overflow pipe B is arranged at the upper end of the water mixing tank.
The utility model has the advantages that:
the tail gas treatment device of the autoclaved sand aerated block brick autoclave has a compact structure and an ingenious design, can improve the waste heat utilization rate of the tail gas of the autoclave in a step-by-step utilization mode on the premise of ensuring the efficient operation of the autoclave, and can purify and recycle the tail gas, thereby solving the problems of low heat utilization rate, low working efficiency and high failure rate existing in the tail gas treatment mode of the autoclaved sand aerated block brick autoclave in the prior art; the requirement of autoclaved sand aerated block brick production and use is met.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the steam generator of the present invention;
FIG. 3 is a schematic structural view of the tail gas purifying mechanism of the present invention;
3 FIG. 34 3 is 3 a 3 schematic 3 view 3 of 3 the 3 structure 3 of 3 FIG. 33 3 in 3 the 3 direction 3 A 3- 3 A 3; 3
FIG. 5 is a schematic view of the structure in the direction B-B in FIG. 3;
FIG. 6 is an enlarged view of the structure at C in FIG. 4;
fig. 7 is a schematic structural view of the waste heat utilization mechanism of the present invention;
fig. 8 is a schematic structural view of the cylinder body of the present invention.
In the figure: 1. a steam source box, 2, a steam generator, 3, a waste heat utilization mechanism, 4, a tail gas purification mechanism, 5, a steam inlet main pipe, 6, a steam outlet main pipe, 7, an autoclave, 8, a steam source valve, 9, a steam pressure regulating valve, 10, a steam inlet branch pipe, 11, a steam outlet branch pipe, 12, a steam outlet valve, 13, a switch valve A, 14, a steam outlet main valve, 15, a switch valve B, 16, a switch valve C, 17, a discharge valve, 18, a steam supplementing valve, 19, a main cylinder body, 20, a steam pocket, 21, a water supplementing valve, 22, a seal head, 23, a seal partition plate, 24, a safety valve, 25, a heat exchange pipe, 26, a seal cooling pool, 27, a heat dissipation water pool, 28, a conveying fan, 29, a purifier, 30, a spray water pump, 31, a partition wall, 32, an air inlet pipe, 33, an exhaust pipe, 34, an overflow pipe, 35, a spray branch pipe, 36, a spray main pipe, 37, an exhaust valve, 38, an exhaust pipe, 40. the device comprises a bracket 41, a spray header 42, a partition plate 43, an air storage chamber 44, an adsorption chamber 45, an activated carbon layer 46, a vent hole 47, a diatomite layer 48, heating coils A and 49, heating coils B and 50, a pre-curing chamber 51, a static stop chamber 52, a water mixing tank 53, a pressure pump A and 54, a pressure pump B and 55, a steam delivery pipe 56, a steam distributing cylinder body 57, a steam inlet 58, a steam outlet 59, a switch valve D and 60, a drain port 61, a drain valve 62, a support plate 63, a steam stop plate 64, a temperature sensor 65 and an overflow pipe B.
Detailed Description
The tail gas treatment device for the still kettle of the autoclaved sand aerated building block brick comprises a steam source box 1, a steam generator 2, a waste heat utilization mechanism 3, a tail gas purification mechanism 4, a steam inlet main pipe 5, a steam outlet main pipe 6 and a plurality of still kettles 7 (see the attached drawing 1 in the specification).
The steam source box 1 is communicated with the steam inlet main pipe 5 through a steam source valve 8; the steam inlet main pipe 5 is communicated with an inlet of the still kettle 7 through a steam inlet branch pipe 10 and a steam pressure regulating valve 9 (see the attached figure 1 in the specification). The steam pressure regulating valve 9 is a conventional device, and has a function of regulating the flow rate of a medium by controlling the opening degree of an opening/closing member in a valve body to reduce the pressure of the medium, regulating the opening degree of the opening/closing member by the action of the post-valve pressure to maintain the post-valve pressure within a certain range, and maintaining the outlet pressure within a set range when the inlet pressure is constantly changed.
The tail gas outlet of the still kettle 7 is communicated with a steam outlet main pipe 6 through a steam outlet branch pipe 11 and a steam outlet valve 12 (see the attached figure 1 in the specification); when the still kettle 7 works, the discharge of the still kettle can be controlled by the steam outlet valve 12.
The steam outlet manifold 6 is communicated with a heating inlet of the steam generator 2 through a switch valve A13 (see the attached figure 1 in the specification); the tail gas generated by the operation of the still kettle 7 can enter the steam generator 2 through the steam outlet valve 12, the steam outlet header pipe 6 and the switch valve A13.
The steam generator 2 is composed of a main cylinder 19, a steam drum 20, a water replenishing valve 21, a seal head 22, a sealing partition plate 23 and a heat exchange pipe 25 (see the attached figure 2 in the specification).
The upper end of the main cylinder 19 is communicated with a steam drum 20; the steam drum 20 communicates with the steam inlet manifold 5 via its own steam outlet and the steam supplementing valve 18 (see figure 1 of the specification). The steam drum 20 has the function of storing steam, and the steam generator 2 can provide boosting steam for the autoclave 7 through the steam supplementing valve 18, the steam inlet main pipe 5 and the steam inlet branch pipe 10 when in operation.
The steam drum 20 is connected with a safety valve 24 (see the attached figure 2 of the specification). When the steam pressure in the steam pocket 20 is higher than the safety pressure during operation, the steam is actively exhausted, so that the purpose of protecting the steam pocket 20 can be achieved, and the problem of 'burst' of the steam pocket 20 due to overlarge internal pressure is avoided.
The sealing partition plates 23 are symmetrically and fixedly arranged in the main cylinder 19; a plurality of heat exchange tubes 25 are arranged between the sealing partition plates 23 in a specification shape; a water replenishing valve 21 is connected on the main cylinder 19 between the sealing plates 23; the water replenishing valve 21 is communicated with an external water source (see the attached figure 2 in the specification); in operation, an external water source can provide desalted water for the steam generator 2 through the water replenishing valve 21.
Two ends of the main cylinder 19 are respectively and fixedly provided with a seal head 22; the seal head 22 at one end of the main cylinder 19 is communicated with a switch valve A13 through a heating inlet of the seal head (see the attached figures 1 and 2 of the specification); the head 22 at the other end of the main cylinder 19 is connected with a steam outlet valve 14 through a heating outlet of the head 22 (see the attached figures 1 and 2 of the specification).
The main steam outlet valve 14 is communicated with the tail gas purification mechanism 4 through a switch valve B15 (see the attached figure 1 in the specification). The steam outlet main pipe 6 is communicated with the exhaust gas purification mechanism 4 through a discharge valve 17 and a switch valve B15. When in work, tail gas generated when the still kettle 7 works can enter the tail gas purification mechanism 4 through the main gas outlet valve 14 and the switch valve B15; or directly enters the tail gas purification mechanism 4 through the steam outlet main pipe 6, the discharge valve 17 and the switch valve B15; the exhaust gas purification means 4 has a function of purifying exhaust gas.
The tail gas purification mechanism 4 is composed of a sealed cooling pool 26, a heat dissipation water pool 27, a conveying fan 28, a purifier 29 and a spray water pump 30 (see the attached figures 3, 4, 5 and 6 in the specification).
The sealed cooling pool 26 is arranged on the bank side of one side of the heat dissipation pool 27 (see the attached figures 3 and 4 in the specification).
The middle part of the sealed cooling pool 26 is provided with a partition wall 31; the upper surface of the partition wall 31 is hermetically connected with the top of the sealed cooling pool 26; the ends of the partition wall 31 are spaced from the ends of the sealed cooling pool 26 (see fig. 3 and 4).
An air inlet pipe 32 is connected to one end of the sealed cooling pool 26 on one side of the partition wall 31, and the air inlet pipe 32 is communicated with an on-off valve B15 (see the attached figure 3 in the specification). The purpose of the sealed cooling bath 26 is to: so that evaporate and press sand air entrainment building block brick to evaporate cauldron tail gas and enter into sealed cooling pond 26 back through intake pipe 32, can remove round partition wall 31 under self pressure and partition wall 31's guide effect, thereby increased and pressed sand air entrainment building block brick to evaporate the removal area of cauldron tail gas in sealed cooling pond 26, and then be convenient for sealed cooling pond 26 to evaporate and press sand air entrainment building block brick tail gas to cool off through spraying branch pipe 35, strengthened the cooling effect.
The intake pipe 32 is provided with an evacuation pipe 38 (see the description of fig. 2) via an evacuation valve 37. The purpose of so arranging the intake pipe 32 is: so that the exhaust valve 37 can be opened when the purification device for the tail gas of the still kettle is needed, and the tail gas is directly discharged outside through the exhaust pipe 38, thereby achieving the purpose of enhancing the safety of the purification device.
An overflow pipe A34 is connected to the side of the sealed cooling pool 26, and an overflow pipe A34 is communicated with the heat dissipation water pool 27 (see the attached figures 3 and 4 in the specification). In operation, water inside the sealed cooling reservoir 26 can overflow into the heat sink reservoir 27 via overflow pipe a 34.
The intake direction of the intake duct 32 coincides with the lateral direction of the partition wall 31 (see fig. 3 in the specification). The purpose of so setting is: after entering the sealed cooling tank 26, the tail gas of the autoclaved sand aerated block brick autoclave can transversely move around the partition wall 31 under the self pressure and the guiding action of the partition wall 31; thereby further enhancing the circulation path and time of the autoclaved sand aerated block brick autoclave tail gas in the sealed cooling pool 26, and achieving the purpose of enhancing the autoclaved sand aerated block brick autoclave tail gas cooling efficiency.
The vertical position of the intake pipe 32 is higher than the vertical position of the overflow pipe a 34: the height of the liquid level in the sealed cooling pond 26 is determined by the vertical position of the overflow pipe A34, namely the height of the liquid level in the sealed cooling pond 26 is consistent with the vertical position of the overflow pipe A34; after the position of the air inlet pipe 32 is set, the tail gas entering from the air inlet pipe 32 can be positioned above the liquid level of the sealed cooling pool 26; thereby avoiding the problem that the water in the sealed cooling pool 26 obstructs the circulation of the tail gas to cause the unsmooth flow of the tail gas and influence the normal work of the still kettle 7.
The sealed cooling pool 26 on the other side of the partition wall 31 is connected with the purifier 29 on the sealed cooling pool 26 through the exhaust pipe 33 and the delivery fan 28 (see the attached figures 3 and 4 in the specification). When the conveying fan 28 works, the autoclave tail gas in the sealed cooling pool 26 can be conveyed to the purifier 29 through the exhaust pipe 33 for purification treatment.
The purifier 29 is composed of an assembly box 39, a bracket 40 and a spray header 41 (see the description and the attached figure 6); an assembly box body 39 is fixedly arranged above the heat dissipation water tank 27 through a support 40 (see the attached figures 4 and 6 in the specification).
The inside of the assembly box 39 is divided into an air storage chamber 43 and an adsorption chamber 44 by a partition plate 42 (see the description and the attached figure 6); one side of the air storage chamber 43 is communicated with the outlet of the conveying fan 28; when the conveying fan 28 is operated, the autoclave tail gas cooled by the sealed cooling pool 26 can be input into the air storage chamber 43.
The top of the adsorption chamber 44 is provided with a spray head 41, and the spray head 41 is communicated with the heat dissipation water tank 27 through a pipeline and the spray water pump 30. When the spray water pump 30 is operated, water in the heat dissipation water pool 27 can be input into the spray header 41 through the pipeline and output in a spraying mode.
A plurality of activated carbon layers 45 are arranged in the adsorption chamber 44 below the spray header 41 at intervals through a grid; the partition plate 42 between the activated carbon layers 45 is provided with a vent hole 46 (see the description and the attached figure 6); when the air storage chamber 43 works, the tail gas of the autoclaved sand aerated block brick autoclave can enter the space between the activated carbon layers 45 through the vent holes 46.
A diatomite layer 47 is arranged below the active carbon layer 45; the assembly case 39 under the diatomite layer 47 is in an open state. Activated carbon layer 45 and diatom soil layer 47 all have the characteristic of stronger filter material and adsorbed material, and when autoclaved sand aerated block brick evaporates cauldron tail gas and passes activated carbon layer 45 and diatom soil layer 47, activated carbon layer 45 and diatom soil layer 47 can adsorb the dust in the tail gas and pungent smell and then reached the purpose of purifying tail gas.
The steam outlet main valve 14 is communicated with the waste heat utilization mechanism 3 through a switch valve C16 (see the attached figure 1 in the specification); the waste heat utilization mechanism 3 is composed of a gas separation cylinder, a heating coil A48, a heating coil B49, a pre-curing chamber 50, a static stop chamber 51, a water mixing tank 52, a booster pump A53 and a booster pump B54 (see the attached figures 7 and 8 of the specification).
The static stop chamber 51 is internally provided with a heating coil A48 and a water mixing tank 52; a heating coil B49 is arranged in the pre-curing chamber 50; the water mixing tank 52 is communicated with one end of a heating coil A48 through a booster pump A53; the water mixing tank 52 is communicated with one end of the heating coil B49 by a pressurizing pump B54. The other end of the heating coil a48 and the other end of the heating coil B49 are in communication with the mixing tank 52 (see the description of fig. 7).
The pre-curing chamber 50 and the static stopping chamber 51 are respectively provided with a temperature sensor 64; the temperature sensor 64 in the pre-curing chamber 50 is electrically connected with the pressure pump B54; the temperature sensor 64 in the static chamber 51 is electrically connected to the pressurizing pump a 53. The temperature sensors 64 corresponding to the pressure pump a53 and the pressure pump B54 can detect the indoor temperatures of the static stop room 51 and the pre-curing room 50; the operating power of the booster pump A53 and the booster pump B54 is controlled (see the description and the attached figure 7).
The booster pump a53 and the booster pump B54 are located outside the static chamber 51: the purpose of so setting is: the problem that the service life of the pressure pump A53 and the pressure pump B54 is influenced when the pressure pump A53 and the pressure pump B54 are in the high-temperature environment of the static chamber 51 for a long time is solved.
The mixing tank 52 must be filled with a certain amount of circulating water in its initial state to avoid the problem of "idling" of the pressurizing pump B54 and the pressurizing pump a 53.
The upper end of the water mixing tank 52 is provided with an overflow pipe B65 (see the description and the attached figure 7). As the tail gas of the still kettle is continuously supplemented into the water mixing tank 52 during the operation, the liquid level in the water mixing tank 52 continuously rises, and when the liquid level in the water mixing tank 52 rises to a certain height, the liquid level overflows to an external water system through the overflow pipe 28 and is reused after being treated by the external water system.
The mixing water tank 52 is communicated with the switch valve C16 through a steam conveying pipe 55 and a steam distributing cylinder (see the description and the attached figure 7). The cylinder is composed of a cylinder body 56 and a steam trap 61 (see the description of fig. 7).
One side of the cylinder body 56 is provided with a steam inlet 57, and the cylinder body 56 is communicated with a switch valve C16 through the steam inlet 57; the upper end of the steam-distributing cylinder body 56 is provided with a steam outlet 58, and the steam outlet 58 is communicated with the water mixing tank 52 through a switch valve D59 and a steam conveying pipe 55; the lower end of the cylinder body 56 is provided with a drain port 60, and a drain valve 61 is connected to the drain port 60 (see fig. 7 and 8 in the specification). Trap 61 is current equipment, and when having the comdenstion water in minute cylinder body 56, the comdenstion water can be arranged outward through trap 61, so can avoid the comdenstion water to exist for a long time in minute cylinder body 56, takes place "water hammer" accident.
A steam stop plate 63 is fixedly arranged in the cylinder body 56 at one side of the steam inlet 57 in an inclined manner through a support plate 62 (see the description and the attached figure 8). The purpose of providing the vapor barrier 63 is: when the tail gas of the still kettle is introduced into the steam distributing cylinder body 56 through the steam inlet 57, the tail gas can be directly sprayed on the steam blocking plate 63, and the spraying direction is changed under the action of the inclined surface of the steam blocking plate 63; therefore, the problem that the exhaust steam is directly injected to the cylinder body 56 to damage the cylinder body 56 can be avoided.
The working method of the autoclaved sand aerated block brick autoclave tail gas treatment device comprises the following steps:
(1) and carrying out steam discharge on the autoclave 7 which needs to discharge tail gas:
a. opening a tail gas discharge port of the still kettle 7 and a corresponding steam outlet valve 12; opening a switch valve A13 to enable tail gas discharged from the autoclave 7 to enter the interior of a seal head 22 at one end of the steam generator 2 (see the attached figures 1 and 2 in the specification) along a steam outlet branch pipe 11, a steam outlet valve 12, a steam outlet main pipe 6 and a switch valve A13;
b. opening the main steam outlet valve 14 and the switch valve C16 to enable the tail gas entering the interior of the end socket 22 at one end of the steam generator 2 to pass through the heat exchange tube 25 and enter the interior of the end socket 22 at the other end of the steam generator 2; the tail gas enters the inside of the waste heat utilization mechanism 3 along the steam outlet main valve 14 and the switch valve C16; in the process, water needs to be supplemented to the main cylinder 19 through the water supplementing valve 21 at any time; so that the tail gas can heat the water in the main cylinder 19 through the heat exchange pipe 25 to generate steam and store the steam in the steam drum 20;
c. the tail gas can generate certain condensed water after heat exchange in the steam generator 2, and the condensed water can be communicated with the tail gas to enter the waste heat utilization mechanism 3; in the process, the tail gas and the condensed water firstly enter the cylinder body 56 through the switch valve C16 and the steam inlet 57; the condensed water entering the cylinder body 56 is discharged outside through the drain valve 61; the exhaust gas entering the cylinder body 56 enters the water mixing tank 52 through the switch valve D59 and the steam transmission pipe 55; the exhaust gas entering the water mixing tank 52 will be mixed with the circulating water inside it; the temperature of the mixed circulating water is increased; in the process, the pressure pump A53 and the pressure pump B54 respectively convey the heated circulating water to the heating coil A48 and the heating coil B49 to heat the static stop chamber 51 and the pre-curing chamber 50, and then the circulating water flows back to the water mixing tank 52 to participate in circulation again; in the above process, when the temperature sensor 64 in the pre-curing chamber 50 senses that the temperature is higher than a certain temperature, the temperature sensor 64 will reduce the circulating speed of the circulating water in the heating coil B49 by reducing the operating power of the pressure pump B54, whereas when the temperature sensor 64 in the pre-curing chamber 50 senses that the temperature is lower than a certain temperature, the temperature sensor 64 will increase the circulating speed of the circulating water in the heating coil B49 by increasing the operating power of the pressure pump B54, so that the temperature in the pre-curing chamber 50 is always maintained within a certain range; similarly, the static stop chamber 51 controls the pressurizing pump a53 through the temperature sensor 64 to keep the temperature in the chamber within a certain range;
(2) and boosting and preheating the autoclave 7 needing boosting:
a. opening a steam supplementing valve 18 and a steam pressure regulating valve 9 connected with the still kettle 7 needing to be boosted, so that steam in a steam pocket 20 of the steam generator 2 can enter the still kettle 7 through the steam inlet main pipe 5, the steam inlet branch pipe 10 and the steam pressure regulating valve 9 to be boosted and preheated;
b. steam in the steam generator 2 enters the autoclave 7 through the steam pressure regulating valve 9 to be subjected to pressure boosting and preheating: if the steam in the steam drum 20 of the steam generator 2 is sufficient, the steam pressure entering the still kettle 7 needs to be adjusted through the steam pressure adjusting valve 9, so that the steam can enter the still kettle 7 at the standard pressure to complete the pressure-increasing preheating work; if the steam in the steam drum 20 of the steam generator 2 is insufficient, the steam source valve 8 needs to be opened, so that the steam in the steam source box 1 can enter the still kettle 7 through the steam inlet main pipe 5, the steam inlet branch pipe 10 and the steam pressure regulating valve 9 for preheating, and the purpose of making up the insufficient steam in the steam generator 2 is achieved;
(3) and, handling of occurrence of an abnormality of the steam generator 2:
a. when the steam generator 2 is abnormal, firstly, the steam outlet main valve 14, the steam supplementing valve 18, the switch valve A13 and the water supplementing valve 21 are closed, so that the steam generator 2 is completely isolated from the outside, and further, people can conveniently overhaul the steam generator 2; simultaneously opening the steam source valve 8 and the discharge valve 17; the steam source box 1 can replace the steam generator 2 to provide a boosting heat source for the still kettle 7, so that tail gas in the still kettle 7 can enter the inside of the waste heat utilization mechanism 3 through the steam outlet main pipe 6 and the switch valve C16 to provide a heat source for heat preservation of the static stop room 51 and the pre-curing room 50;
b. when the exhaust gas exhausted from the still kettle 7 cannot be consumed by the waste heat utilization mechanism 3, the switch valve B15 is opened, so that part of the exhaust gas exhausted from the still kettle 7 can enter the exhaust gas purification mechanism 4 along with the exhaust valve 17 and the switch valve B15 to be exhausted;
c. after the tail gas enters the tail gas purification mechanism 4, firstly, the spray water pump 30 is started to provide a spray water source for the spray header 41 in the purifier 29 and the spray branch pipe 35 in the sealed cooling tank 26 through pipelines; then the conveying fan 28 is started to enable tail gas to enter the sealed cooling pool 26 through the air inlet pipe 32; the exhaust gas then moves around the partition wall 31 under its own pressure and the guiding action of the partition wall 31; in the process, spray water sprayed by the spray branch pipes 35 is mixed with the tail gas to exchange heat with the tail gas, so that the tail gas is sprayed, cooled and decompressed, and meanwhile, part of dust in the tail gas is dissolved in water in a water washing mode and finally overflows to the heat dissipation water tank 27 through an overflow pipe A34; when the cooled and depressurized tail gas moves to the other side of the partition wall 31, the tail gas enters the gas storage chamber 43 of the purifier 29 through the exhaust pipe 33 under the suction action of the conveying fan 28; the tail gas entering the air storage chamber 43 enters the space between the activated carbon layers 45 through the vent holes 46; in the process, the spray water sprayed by the spray head 41 is fully mixed with the tail gas and is driven to pass through the activated carbon layer 45 and the diatomite layer 47 together, and then falls back into the heat-dissipation water tank 27; in the process that the tail gas passes through the activated carbon layer 45 and the diatomite layer 47 along with the spray water, the activated carbon layer 45 and the diatomite layer 47 absorb dust and pungent smell in the tail gas so as to achieve the purpose of purifying the tail gas;
d. when the tail gas is discharged from the plurality of still kettles 7 at the same time and the pressure in the gas outlet main pipe 6 exceeds a set value, opening an exhaust valve 37 in the tail gas purification mechanism 4 to enable part of the tail gas to pass through the exhaust valve to be discharged; when the pressure in the steam outlet main pipe 6 is restored to a normal value, the emptying valve 37 is closed.
The tail gas treatment device of the autoclaved sand aerated block brick autoclave has a compact structure and an ingenious design, can improve the waste heat utilization rate of the tail gas of the autoclave in a step-by-step utilization mode on the premise of ensuring the efficient operation of the autoclave, and can purify and recycle the tail gas, thereby solving the problems of low heat utilization rate, low working efficiency and high failure rate existing in the tail gas treatment mode of the autoclaved sand aerated block brick autoclave in the prior art; the requirement of autoclaved sand aerated block brick production and use is met.
Claims (8)
1. A tail gas treatment device of a still kettle for autoclaved sand aerated building block bricks comprises a steam source box (1), a steam generator (2), a waste heat utilization mechanism (3), a tail gas purification mechanism (4), a steam inlet main pipe (5), a steam outlet main pipe (6) and a plurality of still kettles (7); the steam source box (1) is communicated with the steam inlet main pipe (5) through a steam source valve (8); the steam inlet main pipe (5) is communicated with an inlet of the still kettle (7) through a steam inlet branch pipe (10) and a steam pressure regulating valve (9); the method is characterized in that: a tail gas outlet of the still kettle (7) is communicated with a steam outlet main pipe (6) through a steam outlet branch pipe (11) and a steam outlet valve (12); the steam outlet main pipe (6) is communicated with a heating inlet of the steam generator (2) through a switch valve A (13); a heating outlet of the steam generator (2) is connected with a main steam outlet valve (14) through a pipeline; the steam outlet main valve (14) is communicated with the tail gas purification mechanism (4) through a switch valve B (15); the steam outlet main valve (14) is communicated with the waste heat utilization mechanism (3) through a switch valve C (16); the steam outlet of the steam generator (2) is communicated with the steam inlet main pipe (5) through a steam supplementing valve (18); and the steam outlet main pipe (6) is communicated with the tail gas purification mechanism (4) through a discharge valve (17) and a switch valve B (15).
2. The autoclaved sand aerated block brick autoclaved kettle tail gas treatment device according to claim 1, which is characterized in that: the steam generator (2) is composed of a main cylinder body (19), a steam drum (20), a water replenishing valve (21), a sealing head (22), a sealing partition plate (23) and a heat exchange pipe (25); the upper end of the main cylinder body (19) is communicated with a steam drum (20); the steam pocket (20) is communicated with the steam inlet main pipe (5) through a steam outlet and a steam supplementing valve (18); sealing partition plates (23) are symmetrically and fixedly arranged in the main cylinder body (19); a plurality of heat exchange tubes (25) are arranged between the sealing partition plates (23) in a specification shape; a water replenishing valve (21) is connected on the main cylinder body (19) between the sealing partition plates (23); the water replenishing valve (21) is communicated with an external water source; two ends of the main cylinder body (19) are respectively and fixedly provided with seal heads (22); the end socket (22) at one end of the main cylinder body (19) is communicated with the switch valve A (13) through a heating inlet of the end socket; the end enclosure (22) at the other end of the main cylinder body (19) is communicated with the steam outlet main valve (14) through a heating outlet of the end enclosure; the steam pocket (20) is connected with and provided with a safety valve (24).
3. The autoclaved sand aerated block brick autoclaved kettle tail gas treatment device according to claim 1, which is characterized in that: the tail gas purification mechanism (4) consists of a sealed cooling pool (26), a heat dissipation water pool (27), a conveying fan (28), a purifier (29) and a spray water pump (30); a sealed cooling pool (26) is arranged on the bank side of one side of the heat dissipation pool (27); a partition wall (31) is arranged in the middle of the sealed cooling pool (26); the upper surface of the partition wall (31) is hermetically connected with the top of the sealed cooling pool (26); the end heads at the two ends of the partition wall (31) are respectively provided with a certain gap with the two ends of the sealed cooling pool (26); one end of the sealed cooling pool (26) at one side of the partition wall (31) is connected with an air inlet pipe (32); the air inlet pipe (32) is communicated with the switch valve B (15); the sealed cooling pool (26) at the other side of the partition wall (31) is connected with a purifier (29) on the sealed cooling pool (26) through an exhaust pipe (33) and a conveying fan (28); the purifier (29) is communicated with the heat dissipation water tank (27) through a pipeline and a spray water pump (30); the side surface of the sealed cooling pool (26) is connected with an overflow pipe A (34), and the overflow pipe A (34) is communicated with the heat dissipation water pool (27).
4. The autoclaved sand aerated block brick autoclaved kettle tail gas treatment device according to claim 3, characterized in that: spray branch pipes (35) are respectively arranged in the sealed cooling pools (26) at the two sides of the partition wall (31); one end of the spray branch pipe (35) is connected with a spray main pipe (36), and one end of the spray main pipe (36) penetrates out of the sealed cooling tank (26) and is communicated with the heat dissipation water tank (27) through a pipeline and a spray water pump (30); the air inlet direction of the air inlet pipe (32) is consistent with the transverse direction of the partition wall (31); the vertical position of the air inlet pipe (32) is higher than that of the overflow pipe A (34); the air inlet pipe (32) is provided with an emptying pipe (38) through an emptying valve (37).
5. The autoclaved sand aerated block brick autoclaved kettle tail gas treatment device according to claim 4, characterized in that: the purifier (29) is composed of an assembly box body (39), a bracket (40) and a spray header (41); an assembly box body (39) is fixedly arranged above the heat dissipation water pool (27) through a bracket (40); the inside of the assembly box body (39) is divided into an air storage chamber (43) and an adsorption chamber (44) through a partition plate (42); one side of the air storage chamber (43) is communicated with the outlet of the conveying fan (28); the top of the adsorption chamber (44) is provided with a spray head (41), and the spray head (41) is communicated with the heat dissipation water tank (27) through a pipeline and a spray water pump (30); a plurality of activated carbon layers (45) are arranged in the adsorption chamber (44) below the spray header (41) at intervals through a grid; the partition plate (42) between the activated carbon layers (45) is provided with a vent hole (46); a layer of diatomite (47) is arranged below the activated carbon layer (45); the assembly box (39) under the diatomite layer (47) is in an open state.
6. The autoclaved sand aerated block brick autoclaved kettle tail gas treatment device according to claim 1, which is characterized in that: the waste heat utilization mechanism (3) comprises a gas separation cylinder, a heating coil A (48), a heating coil B (49), a pre-curing chamber (50), a static stop chamber (51), a water mixing tank (52), a pressure pump A (53) and a pressure pump B (54): a heating coil A (48) and a water mixing tank (52) are arranged in the static stop chamber (51); a heating coil B (49) is arranged in the pre-curing chamber (50); the water mixing tank (52) is communicated with one end of the heating coil A (48) through a pressure pump A (53); the water mixing tank (52) is communicated with one end of the heating coil B (49) through a booster pump B (54); the other end of the heating coil A (48) and the other end of the heating coil B (49) are communicated with a water mixing tank (52); the water mixing tank (52) is communicated with the switch valve C (16) through a steam transmission pipe (55) and a steam separating cylinder.
7. The autoclaved sand aerated block brick autoclaved kettle tail gas treatment device according to claim 6, which is characterized in that: the cylinder is composed of a cylinder body (56) and a drain valve (61); a steam inlet (57) is formed in one side of the steam-dividing cylinder body (56), and the steam-dividing cylinder body (56) is communicated with the switch valve C (16) through the steam inlet (57); the upper end of the steam-distributing cylinder body (56) is provided with a steam outlet (58), and the steam outlet (58) is communicated with the water mixing tank (52) through a switch valve D (59) and a steam conveying pipe (55); the lower end of the cylinder body (56) is provided with a drain port (60), and the drain port (60) is connected with a drain valve (61).
8. The autoclaved sand aerated block brick autoclaved kettle tail gas treatment device according to claim 7, characterized in that: a steam blocking plate (63) is fixedly arranged in the steam distributing cylinder body (56) at one side of the steam inlet (57) in an inclined manner through a supporting plate (62); temperature sensors (64) are respectively arranged in the pre-curing chamber (50) and the static stopping chamber (51); a temperature sensor (64) in the pre-curing chamber (50) is electrically connected with the pressure pump B (54); a temperature sensor (64) in the static stop chamber (51) is electrically connected with the pressure pump A (53); an overflow pipe B (65) is arranged at the upper end of the water mixing tank (52).
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|---|---|---|---|
| CN202020765960.8U CN212193628U (en) | 2020-05-11 | 2020-05-11 | Evaporate and press sand air entrainment building block brick to evaporate and press cauldron tail gas processing apparatus |
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|---|---|---|---|
| CN202020765960.8U CN212193628U (en) | 2020-05-11 | 2020-05-11 | Evaporate and press sand air entrainment building block brick to evaporate and press cauldron tail gas processing apparatus |
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| CN212193628U true CN212193628U (en) | 2020-12-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643636A (en) * | 2022-03-11 | 2022-06-21 | 广东碧品居建筑工业化有限公司 | Hot gas mutual conduction system for concrete member maintenance and control method thereof |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643636A (en) * | 2022-03-11 | 2022-06-21 | 广东碧品居建筑工业化有限公司 | Hot gas mutual conduction system for concrete member maintenance and control method thereof |
| CN114643636B (en) * | 2022-03-11 | 2023-09-22 | 广东碧品居建筑工业化有限公司 | Hot gas mutual conductance system for concrete member maintenance and control method thereof |
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